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Service Manual TDS 500B, 600B & TDS 700A Digitizing

1. 5 13 Figure 5 7 Exposing the Probe Body 5 16 Figure 5 8 Initial Test Hookup 5 16 Figure 5 9 Locations of P6139A Probe Adjustments 5 18 Figure 5 10 Adjustments versus Front Corner Response 5 19 Figure 5 11 Five and Ten Percent Luminance Patches 5 21 Figure 6 1 External Modules 6 12 Figure 6 2 Outer Chassis Modules 6 13 Figure 6 3 Inner Chassis Modules 6 14 Figure 6 4 Knob 6 17 Figure 6 5 Line Fuse and Line Cord Removal 6 18 Figure 6 6 Rear Cover and Cabinet Removal 6 21 Figure 6 7 Front Cover Trim Ring Menu Buttons and Attenuator Panel Removal Front Cover not Shown 6 22 Figure 6 8 A12 Front Panel Assembly Removal 6 24 Figure 6 9 Disassembly of Front Panel Assembly 6 25 Figure 6 10 Cabinet Modules Removal 6 28 TDS 500B TDS 600B and TDS 700A Service Manual Table of Contents Figure 6 11 A14 D1 Bus and Analog Power and Digital Power Cables Removal EV En ERE ER E eise 6 30 Figure 6 12 Remove Circuit Board Assembly From Oscilloscope 6 31 Figure 6 13 Remove Circuit Board From Assembly 6 32 Figure 6 14 Circui
2. from 2 of the DRAM Processor Display Nene ine au VOIE module see Figure 6 36 and power back on dramatically decrease when the ON STBY button is toggled Replace the Al2 Front Panel module gt Probe J 26 and J 27 butDO NOT REMOVE the cables from the connector see pins Are jecur s V Figure 6 36 The voltages will 15 V 15 V 5 1 35V 5 1V and change if the A11 DRAM 5 V and 45 1 V End respectively Processor Display module is respectively not connected to the power supply P robe J 26 pins 7 11 17 and 35 and J 27 pin 17 There must be a problem with the Perform the Low communication link between the A11 Voltage Power Supply DRAM Processor Display and the A12 troubleshooting Front Panel The A12 Front Panel module procedure has most likely failed Replace this module Does the Front Pane Ww No zl work correctly now Y Yes Replace the A11 DRAM Processor Display module Figure 6 34 Processor Front Panel Troubleshooting Procedure TDS 500B TDS 600B and TDS 700A Service Manual 6 67 Troubleshooting Attach a probe to the PROBE COMPENSATION signal located on the front of the oscilloscope Connect the probe to a channel s BNC on the front select the channel and view the output on the display Do this for all the channels Setall the channels to the same vertical scale Do all and select a channel that works correctly the
3. Tek Run 5 00GS s Sample Width Lower Limit 2 0ns 00 1 1 O Pulse width Trig when Set upper E and lower Out of Limits limits that tinii ensure er Limi y triggering Then change Lower Limit limits until triggering 3 stops dO0mvo M10 0ns width Chi Source Polarity Level mE Type Class Jp Pn amp Pes widths Ch Positive amv Holdoft IDC O lO X Figure 4 15 Measurement of Time Accuracy for Pulse and Glitch Triggering 3 Confirm the trigger system is within time accuracy limits for pulse glitch or pulse width triggering horizontal scale gt 1 us a Set upper and lower limits that ensure triggering at 250 kHz Press the side menu button Upper Limit Use the keyboard to set the upper limit to 4 us m Press the side menu button Lower Limit Use the keypad to set the lower limit to 500 ns Display the test signal m Set the horizontal SCALE to 5 us m Set the output of the sine wave generator for a 250 kHz five division sine wave on screen Set the vertical SCALE to 20 mV the waveform will overdrive the display m Press SET LEVEL TO 50 Check against limits Do the following subparts in the order listed Press the side menu button Lower Limit m Use the general purpose knob to increase Lower Limit readout until triggering is lost TDS 500B TDS 600B and TDS
4. Push the front panel button that corresponds to the menu containing the function A main menu 14 for selecting among related functions appears Example Push VERTICAL MENU Note the two labels the top label is a function to choose from the bottom label tells you the current setting for that function Offset is currently set to 0 V d Select a function from the main menu using the main menu buttons 12 A side menu for selecting among that the available settings for that function appears Example Push Coupling 13 TDS 500B TDS 600B and TDS 700A Service Manual 2 11 Operating Instructions How to Set Complex Functions e Select the setting for the function from the side menu 9 using the side menu buttons 11 Example Push AC 10 A few functions require more than just two levels main and side of menus to completely specify their settings In such cases either the main menu the side menu or both are modified to supply additional choices The procedures that follow show both schemes 1 Setup a function using pop up menus Tek Run 5 00GS 5 Sample Holdoff 250ns Mode amp Holdoff Normal Default Holdoff 25 ns t M soops chi 27mv BREST 18 Source Coupling ui eh 25 2 Holdoff 16 For some selections pushing a main menu button pops up a
5. Figure 4 41 Sine Wave Generator Leveling Equipment Setup 1 Install the test hookup Connect the equipment as shown in Figure 4 41 2 Setthe Generator m Set the sine wave generator to a reference frequency of 10 MHz m Adjust the sine wave generator amplitude to the required number of divisions as measured by the digitizing oscilloscope 3 Record the reference level Note the reading on the level meter 4 Set the generator to the new frequency and reference level m Change the sine wave generator to the desired new frequency Input the correction factor for the new frequency into the level meter m Adjust the sine wave generator amplitude until the level meter again reads the value noted in step 3 The signal amplitude is now correctly set for the new frequency TDS 500B TDS 600B and TDS 700A Service Manual 4 85 Performance Tests Equipment Re Sine wave generator Item 19 quired Level meter and power sensor Item 20 Two male N to female BNC adapters Item 23 Two precision coaxial cables Item 5 Prerequisites See page 4 15 1 Install the test hookup Connect the equipment as shown in Figure 4 42 start with the sine wave generator connected to the digitizing oscilloscope Sine Wave Digitizing Oscilloscope Generator QO Output Level Meter Connect the sine wave generator to the
6. Power oscilloscope and the Sensor power sensor as O directed in the text Input Figure 4 42 Equipment Setup for Maximum Amplitude 2 Setthe Generator m Set the sine wave generator to a reference frequency of 10 MHz m Adjust the sine wave generator amplitude to the required number of divisions as measured by the digitizing oscilloscope 3 Record the reference level m Disconnect the sine wave generator from the digitizing oscilloscope m Connect the sine wave generator to the power sensor Note the level meter reading 4 86 TDS 500 TDS 600B and TDS 700 Service Manual Performance Tests 4 Set the generator to the new frequency and reference level Change the sine wave generator to the desired new frequency Input the correction factor for the new frequency into the level meter Adjust the sine wave generator amplitude until the level meter again reads the value noted in step 3 The signal amplitude is now correctly set for the new frequency Disconnect the sine wave generator from the power sensor Connect the sine wave generator to the digitizing oscilloscope TDS 500B TDS 600B and TDS 700A Service Manual 4 87 Performance Tests 4 88 TDS 500 TDS 600B and TDS 700 Service Manual EE I 5 Adjustment Procedures Description Purpose Adjustment Interval This section contains information needed to adjust the TDS 500B TDS 6
7. 101 0142 00 1 101 0142 01 1 334 9163 00 1 334 9164 00 1 334 9165 00 1 334 9095 00 1 334 9097 00 1 334 9098 00 1 334 9096 00 1 334 9166 00 1 334 9156 00 1 334 9289 00 1 334 9290 00 1 334 8551 01 1 214 4287 00 1 Name amp Description COVER REAR REAR COSMETIC COVER CABLE ASSY PWR 3 18 AWG 92 L SVT TAN STANDARD ACCESSORY CLAMP PWR CORD POLY MIDE STANDARD ACCESSORY CAP FUSEHOLDER 3AG FUSES AMERICAN EUROPEAN AMERICAN EUROPEAN CABINET ASSY CAP FUSEHOLDER 5 X 20MM FUSES FUSE CARTRIDGE 3AG 6A 250V FAST BLOW FUSE CART DIN 5 X 20MM 5AMP 250VSLOW HANDLE CARRYING 11 54 L W CLIP CAP RETAINER PLASTIC CABINET SCOPE FOOT CABINET PAD FOOT TEK BLACK SANTOPRENE FLIPSTAND CAB GASKET SHIELD 348 1109 00 CUT 45 01 COVER FRONT PLASTIC STANDARD ACCESSORY TRIM DECORATIVE FRONT TRIM DECORATIVE FRONT for use in Opt 1R rackmount instruments MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL MARKER IDENT FRONT LABEL TDS520B TDS540B TDS540B Opt 16 TDS620B TDS644B TDS680B TDS684B TDS724A TDS724A Opt 1G TDS754A TDS782A TDS784A ACTUATOR ELASTOMER MAT FRONT PANEL RBR for use in TDS 600B
8. Figure 6 22 Display Assembly Removal 5 Remove the display supply board Use Figure 6 23 as a guide a Remove the six screws that mount the display driver board to the main chassis b Grasp the display driver board Work from the front and top to tilt the board so its right edge is up and its left side is down and lift it out of the top of the oscilloscope s main chassis TDS 500B TDS 600B and TDS 700A Service Manual 6 49 Removal and Installation Procedures 6 50 Move circuit board forward to clear g main chassis Figure 6 23 Display Driver Board Removal 6 Reinstallation a Do in reverse order substeps 5a 5b reversing each step to reinstall Display Driver board Do in reverse order substeps 4a 4e reversing each step to reinstall the display tube if removed See step 3 to reinstall the supply fuse if it was removed See the following procedures in order to complete reassembly of the oscilloscope m Cover and Board Brackets top cover only on page 6 37 All Processor Display Board page 6 36 m If option 05 is installed A29 Video Trigger Board page 6 32 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures Wm A74 DI Bus and Analog Power Digital Power Cables page 6 29 m Display Frame Assembly m Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 m Rear Cover and Cabinet page 6 18
9. Operational Information Installation gt 02655 a Supplying Operating Operating Environment Applying and Interrupting Power Repackaging Instructions Installed Options cU RC te OS Operating Instructions Screen Layouts 44 5 el Le Reate pur due Coh quem ce n eue pom A e RT Basic Procedures ce etr Ip dea pe RE Mead uec S depen EA Theory of Operation Logic Conventions eere e e dos Module Overview LA RIS PR hase dha TDS 500B TDS 600B TDS 700 Service Manual ix xiii XV XV XVi xvii xix xix xix XX 2 1 2 1 2 3 2 3 2 4 2 7 2 7 2 7 WwW Table of Contents Performance Verification Input Channels vs Model 4 2 Conventions sonr NE E 4 2 Brief Procedures ota zer E Reena PCR Ee FER med n 4 5 Self Tests kt DR EL p beca a der i pO RC epar 4 5 Functional Tests Rege are Rec Eee 4 7 Performance Tests 4 15 Prerequisites eoe tu AP gd ER e NU T 4 15 Equipment Required esee
10. 4 2 TDS 500B TDS 600B and TDS 700A Service Manual Performance Verification Procedures Initialize the oscilloscope Press save recall SETUP Now press the main menu button Recall Factory Setup then the side menu button OK Confirm Factory Init Where instructed to use a front panel button or knob or select from a main or side menu or verify a readout or status message the name of the button or knob appears in boldface type press SHIFT then UTILITY press the main menu button System until Cal is highlighted in the pop up menu Verify that the status message is Pass in the main menu under the Voltage Reference label STOP The symbol at the left is accompanied by information you must read to do the procedure properly m Refer to Figure 4 Main menu refers to the menu that labels the seven menu buttons under the display side menu refers to the menu that labels the five buttons to the right of the display Pop up menu refers to a menu that pops up when a main menu button is pressed Position of waveform record relative to General purpose the screen and display knob readout Brief status dis information darin 0 Side menu Graticule and waveforms rL L area Readouts Set to TTL N for Waveform reference U measu
11. 01331 0909 MIS S p 9 0000 28 o 0 9 ZN 5900 o o o 9 951058 885 fach 080 S 99 9 I 0000 9 pp 9 Q 600 600 5 59509 Q 6060 S 9 6000000000000 0000 o lo o 6 5 9 6 0000000000000 o o 9 Q 0000 lo q Em m m m me tm at push 222 ei eae eee ko 0209 522 5 m B olo ego img 9 E B 0590 o Sw E E E z S JEJEJ E LOI 2 Pin 1 noogl Yo zu SS cfd EIS E E E E S85 zu a a ES E E E SEG EE EE IN a E 26 2 BS 8 SE ed Pin3 BUS e 8 SS oq z z ed Eo E B gt fa PEE SE dE E AS B B E E E B B B E 25 17 d od z c ed ote c E m 5 ed 127 E E E B oh S eq 6 B Bg B gd E BE v P Pin 3 Y d d ocu fet ey e Pin 4 E S d HU 2 8 3 I E oA RAS NI c 8
12. To avoid electric shock or injury use extreme caution when handling the CRT Only qualified personnel familiar with CRT servicing procedures and precautions should remove or install the CRT CRTs retain hazardous voltages for long periods of time after power is turned off Before attempting any servicing discharge the CRT by shorting the anode to chassis ground When discharging the CRT connect the discharge path to ground and then the anode Rough handling may cause the CRT to implode Do not nick or scratch the glass or subject it to undue pressure when removing or installing it When handling the CRT wear safety goggles and heavy gloves for protection Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacing components To avoid electric shock do not touch exposed connections To avoid x radiation exposure do not modify or otherwise alter the high voltage circuitry or the CRT enclosure X ray emissions generated within this product have been sufficiently shielded TDS 500B TDS 600B and TDS 700A Service Manual xiii Service Safety Summary xiv TDS 500B TDS 600B and TDS 700A Service Manual Preface Manual Structure This preface contains information needed to properly use this manual to service the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes as well as general information c
13. 4 80 Press the side menu Fields Use the keypad to set the number of fields to 1 press 1 then ENTER Press the side menu Sync Width Use the keypad to set the width to 400 ns press 400 SHIFT n then ENTER Press the side menu 1 of 2 Then press V1 Start Time Use the keypad to set V1 start time to 10 10 us press 10 10 SHIFT then ENTER Press the side menu V1 Stop Time Use the keypad to set V1 stop time to 10 50 us press 10 50 SHIFT then ENTER Press the main menu Type pop up to select Edge Press HORIZONTAL MENU Press the main menu Record Length Select the side menu 1000 points in 20div If needed first press the side menu more until you see the appropriate side menu item Turn the HORIZONTAL POSITION knob to position the trigger two divisions to the left of the center screen Press MEASURE If needed press the main menu Select Measrmnt Press the side menu Negative Width Press the side menu Period Set up the pulse generator for Sync Duty Cycle Test Set PULSE DURATION to 50 ns Set PERIOD to 10 us Set OUTPUT VOLTS to 1 for LOW LEVEL and 1 for HIGH LEVEL Depress the COMPLEMENT button Be sure BACK TERM is depressed in TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Check Sync Duty Cycle m Connect the pulse generator through a 50 cable and a 50 terminator to the oscilloscope input See Figure 4 38
14. CH 3 CH4 ee V Input waveforms into these channels 7 Example CH 1 Push any channel s button 8 to display its waveform The last channel turned on determines which waveform is positioned and scaled The indicator above the channel last selected is lighted Example Push CH 1 then CH 2 Vertically 1 and horizontally 2 scale and position the waveform s selected Example Set the scale to 100 mV div and center the waveform On screen Stop and start acquiring waveforms 3 Example Push RUN STOP if not acquiring TDS 500B TDS 600B and TDS 700A Service Manual Operating Instructions e Adjust trigger level 6 to trigger the waveform s selected or use these buttons 5 to either set a trigger level at the mid amplitude level of the selected waveform or to force a single trigger Example Push SET LEVEL 50 3 Setall other functions using menus a Choose the waveform source 8 first if setting a vertical function else skip to step b Example Push CH 2 b Push SHIFT 4 if the function to be set is highlighted in blue else skip to step c Run 100kS s Sample 10 gt 1 100mVv M 500 6 Cha 0 V oupling Bandvsiden Position Offset Cal Probe 14 PA initialized oO V 2 Y 12 CIO
15. Performance Tests Sine Wave To AUX TRIG INPUT Generator on Rear Panel Digitizing Oscilloscope 2402 Figure 4 18 Initial Test Hookup 2 Confirm Main and Delayed trigger systems are within sensitivity limits 50 MHz a Display the test signal m Set the generator frequency to 50 MHz m Press MEASURE Press the main menu button High Low Setup then press the side menu button Min Max Press the main menu button Select Measrmnt for Ch Press the side menu button more until Amplitude appears in the TEF side menu its icon is shown at the left Press the side menu button Amplitude m Press SET LEVEL TO 50 m Press CLEAR MENU m Set the test signal amplitude for about three and a half divisions on screen Now fine adjust the generator output until the CH 1 Amplitude readout indicates the amplitude is 350 mV Readout may fluctuate around 350 mV m Disconnect the 50 Q precision coaxial cable at CH 1 and reconnect it to CH 1 through a 10X attenuator b Check the Main trigger system for stable triggering at limits m Read the following definition A stable trigger is one that is consistent that is one that results in a uniform regular display triggered on the selected slope positive or negative This display should not have its trigger point switching between opposite slopes nor should it roll across the screen At horizontal scale settings of 4 54 TDS
16. The two levels of diagnostics are the short confidence set and the extended set that tests the oscilloscope circuitry in depth and takes more time At power on the oscilloscope automatically executes the short set The extended set is optional and is executed by using the following procedure Prerequisites Power on the oscilloscope and allow a 20 minute warm up before doing this procedure 1 Display the System diagnostics menu a Press SHIFT then press UTILITY b Repeatedly press the main menu button System until Diag Err is highlighted in the pop up menu 2 Run the System Diagnostics Press the main menu button Execute then press the side menu button OK Confirm Run Test 3 Wait The internal diagnostics do an exhaustive verification of proper oscilloscope function This verification will take about two minutes When finished the oscilloscope will display a report of any bad modules and or interfaces TDS 500B TDS 600B and TDS 700A Service Manual 6 57 Troubleshooting Firmware Updates Digitizing Oscilloscopes firmware updates are easy to do Simply install the firmware disks on your PC and follow the instructions in the README file located on the first disk NOTE You must set the Protection switch to the unprotected position before updating the Firmware Figure 6 25 shows how to set the switch After loading the Firmware be sure you set the switch back to the protected position and cycle power If you
17. 1 V offset CH1 5 mV Vert scale setting 1 0471 V 1 0329V 5 Div position setting 1 V offset 200 mV Vert scale setting 11 4165 V 11 7835 V 5 Div position setting 10 V offset CH1 200 mV Vert scale setting 11 7835 V 11 4165 V 5 Div pos ition setting 10 V offset CH1 1 V Vert scale setting 17 2425 V 18 7575 V 5 Div position setting 10 V offset CH1 1 V Vert scale setting 18 7575 V 17 2425 V 5 Div position setting 10 V offset CH2 5 mV Vert scale setting 5 Div position setting 1 V offset CH2 5 mV Vert scale setting 1 0329 V tion setting 1 V offset tion setting 10 V offset 5 Div posi CH2 200 mV Vert scale setting 5 Div posi CH2 200 mV Vert scale setting 5 Div pos TDS 500B TDS 600B and TDS 700A Service Manual ition setting 10 V offset 1 0471 V 11 4165 V 11 7835 V 1 0471 V 11 7835 V 11 4165 V 4 19 Performance Tests TDS 600B Test Record Cont Instrument S erial Num Temperature Date of Calibration ber TDS 600B Performance Test Certificate Number RH 96 Technician Minimum Incoming Outgoing Maximum CH2 1 V Vert scale setting 17 2425 V t 18 7575 V 5 Div position setting 10 V offset CH2 1 V Vert scale setting 18 7575 V 17 2425 V 5 Div position setting 10 V offset CH3 5 mV Vert scale setting 1 0329 V 1 0471V orAX1 5 Div position setting 1 V offse
18. 4 441 2043 00 1 CHASSIS SCOPE MAIN 0 05 ALUMINUM 0 9P9 441 2043 00 5 386 5871 01 1 SUBPANEL FRONT FINISHED ALUMINUM 5Y400 386 5871 01 10 10 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List 20 30 A30 shown Figure 10 3 Inner Chassis Modules 10 11 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Replaceable Parts List Fig amp Index Num Tektronix Serial No Serial No Mfr Mfr Part Num ber Part Number Effective Discontd Qty Name amp Description Code ber 4 1 174 2031 00 4 CABLE ASSY RF 50 OHM COAX 6 5 L W BLUE J KT TK2338 174 2031 00 10 1000 MAIN TO TRIGGER OUTPUT 10 1001 TO DELAYED TRIGGER OUTPUT 10 12 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Figure 10 4 Cables Bottom View TDS 500B TDS 600B and TDS 700A Service Manual 10 13 Mechanical Parts List Replaceable Parts List Fig amp Index Num Tektronix Serial No Serial No Mfr Mfr Part Num ber Part Number Effective Discontd Qty amp Description Code ber 5 1 174 1525 00 1 CA ASSY SP ELEC 2 X 8 13 28 AWG TK2469 ORDER BY DESC 2 174 1524 01 1 CA ASSY SP RIBBON GPIB IDC 24 28 AWG 4 0L TK2469 ORDER BY DESC 129 1439 00 2 SPACER P05T 0 17 L 4 40 BRS 0 25 RND TK0588 ORDER BY DESC USE WITH 174 1524 XX ONLY 3 174 2975 00 1 CA ASSY SP RIBBON CPR 16 28 AWG 4 0 L TK2469 OR
19. Performance Tests Deiay Time 10 000000115 1 Tek Run i MS s Sampie Time Base SN 7 Main only A Intensified Align the trigger T to the 1 center graticule line Set 2 horizontal mode Delayed Runs 10 000000 5 Delayed Triggerable see Delayed Trig Menu ooms Chi 200mVo 7 5001 Runs after ariz EET Base Del ET g ger Position C 5C 7 4 3 Check long term sample Set horizontal scale rates and delay time and delayed time accuracies against limits Figure 4 13 Measurement of Accuracy Long Term and Delay Time 3 Disconnect the hookup Disconnect the cable from the generator output at the input connector of CH 1 Trigger System Checks These procedures check those characteristics that relate to the Main and Delayed trigger systems and are listed as checked in Specifications Check Accuracy Time Equipment Re One medium frequency sine wave generator for Pulse Glitch or quired Item 19 or optionally item 25 Pulse Width Triggering One 10X attenuator Item 1 One 50 precision coaxial cable Item 5 Prerequisites See page 4 15 TDS 500B TDS 600B and TDS 700A Service Manual 4 45 Performance Tests 1 Install the test hookup and preset the instrument controls a Initialize t
20. Warranted Characteristics Table 1 10 Warranted Characteristics Signal Acquisition System Name Accuracy DC Gain Description TDS 600B 1 5 for all sensitivities from 2 mV div to 10 V div 2 0 at 1 mV div sensitivity TDS 500B 700A 1 for all sensitivities from 1 mV div to 10 V div with offset from 0 V to 100V Accuracy DC Voltage Measurement Averaged using Average mode Measurement Type DC Accuracy Average of 2 16 waveforms Delta volts between any two averages of gt 16 waveforms acquired under the same setup and ambient conditions TDS 600B 1 5 x reading Net Offset Offset Accuracy 0 06 div x V div TDS 500B 700A 1 0 x reading Net Offset Offset Accuracy 0 06 div x V div TDS 6008 1 5 x reading 0 1 div x V div 0 3 mV TDS 500B 700A 1 0 x reading 0 1 div x V div 0 3 mV Accuracy Offset Analog Bandwidth DC 50 Coupled and Bandwidth selection is FULL TDS 600B Analog Bandwidth DC 50 Coupled and Bandwidth selection is FULL TDS 500B 700A Volts Div Setting TDS 600B Offset Accuracy TDS 500B 700A set Accuracy 1 mV div 100 mV div 101 mV div 1 V div 1 01 V div 10 V div 0 2 x Net Off set 1 5 mV 0 6 div x V div 0 25 x Net Off set 15 mV 0 6 div x V div 0 25 x Net Off set 1 150 mV 0 2 x Net Off set 1
21. 0 state Signal states may also be described as true meaning their active state or false meaning their nonactive state The specific voltages that constitute a high or low state vary among the electronic devices Active low signals are indicated by a tilde prefixed to the signal name RE SET Signal names are considered to be either active high active low or to have both active high and active low states Module Overview This module overview describes the basic operation of each functional circuit block as shown in Figure 9 2 General TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes have four channels Each channel provides a calibrated vertical scale factor Input Signal Path signal enters the oscilloscope through a probe connected a BNC on the A10 Attenuator Acquisition board Attenuators Circuitry in the attenuator selects the input coupling termination and the attenuation factor The processor system by way of the acquisition system controls the attenuators For example if 50 Q input termination is TDS 500B TDS 600B and TDS 700A Service Manual 3 1 Theory of Operation Tube Assembly selected and the input is overloaded the processor system switches the input to the 1 MQ position Probe Coding Interface Probe coding interface signals pass through the attenuator portion of the A10 Attenuator Acquisition to the acquisition system where they are sensed and controlled Acquisition
22. 2 4 Table 4 1 Test Equipment 4 16 TDS 600 Test Record 4 19 TDS 500B 700A Test Record 4 23 Table 4 2 DC Offset Accuracy Zero Setting 4 28 Table 4 3 DC Voltage Measurement Accuracy 4 31 Table 4 4 Analog Bandwidth 4 35 Table 4 5 Delay Between Channels Worksheet 4 42 Table 5 1 Calibration Tests 5 3 Table 5 2 Adjustments Required for Module Replaced 5 4 Table 5 3 Adjustments and Dependencies 5 4 TDS 500B TDS 600B and TDS 700A Service Manual vii Table of Contents viii Table 5 4 Test Equipment Fixtures and Supplies 5 5 Table 5 5 GPIB Board Configuration 5 7 Table 6 1 Relative Susceptibility to Static Discharge Damage 6 2 Table 6 2 External Inspection Check List 6 5 Table 6 3 Internal Inspection Check List 6 6 Table 6 4 Tools Required for Module Removal 6 11 Table 6 5 Normal Supply Voltages Measured on J26 and J27 on the DRAM Processor Display Module 6 63 Table 6 6 No Load Supply Voltages Measured J5 J6 on the A17 Main LV Power Supply Module 6 63 Table 7 1 Options 15 RR heh eer SUE
23. For later field conversions order 016 1136 00 20 TCP202 CurrentProbe Add current probe calibrator Calibrator Option is only available for TDS 500B and TDS 700A models i 21 TCP202 CurrentProbe Add current probe calibrator probe and HV differential probe 7 2 Calibrator and HV Differential P robe Option is only available for TDS 500B and TDS 700A models TDS 500B TDS 600B and TDS 700A Service Manual Options and Accessories Table 7 1 Options Cont Option Label Description 22 Two passive probes Add two 500 MHz P 6139A passive probes Option applies only to TDS 520B and TDS 724A models 23 Two active probes Add two 1 GHz P6243 active probes Option applies only to TDS 500B TDS 724A and TDS 754A models 24 Four passive probes Add four 500 MHz P6139A passive probes Option applies only to TDS 600B TDS 782A and TDS 784A models 26 Four active probes Add four 1 5 GHz probe only P6245 active probes Option applies only to TDS 684B and TDS 784A models 27 Two active probes Add two 1 5 GHz probe only P6245 active probes USR Option applies only to TDS 680B and TDS 782A models nn 28 ADA 400A Differential Add one differential preamp switchable gain Preamplifier Option applies only to TDS 500B and TDS 700A models 2D Two active probes Delete two standard probes normally shipped with the oscilloscope Option applies only to TDS 520B TDS 620B and TDS 724A models TDS 500
24. TDS 680B amp 684B and Bandwidth selection is FULL TDS 600B 520B 540B 724A 754A 782A amp 784A Volts Div as Read Out on Screen Bandwidth 10 V div 100 V div 500 MHz 100 mV div 10 V div 500 MHz 50 mV div 99 5 mV div 500 MHz 20 mV div 49 8 mV div 500 MHz 10 mV div 19 9 mV div 500 MHz 620B amp 644B 680 amp 684 Volts Div as Read Out on Screen Bandwidth Bandwidth 10 V div 100 V div Not Applicable Not Applicable 100 mV div 10 V div DC 500 MHz DC 1GHz 50 mV div 99 5 mV div DC 450 MHz DC 750 MHz 20 mV div 49 8 mV div DC 300 MHz DC 600 MHz 10 mV div 19 9 mV div DC 250 MHz DC 500 MHz TDS 500B TDS 600B and TDS 700A Service Manual 1 23 Typical Characteristics Table 1 16 Typical Characteristics Signal Acquisition System Cont Name Accuracy Delta Time Measurement Conditions for accuracy listed at right are Single Shotor Sample mode or HiRes mode on the TDS 500B 700A with Full Bandwidth selected Conditions for accuracy listed at right are gt 100 Averages will Full Band width selected and for TDS 500B 700A repetitive mode Description The limits are given in the following table for signals having amplitude greater than 5 divisions reference level 50 filter set to sinX X acquired at 5 mV div or greater For the TDS 700A pulse duration 10 div Channel skew not included For the Single Shot condition 1 4 lt T S 4 where S is
25. completes reassembly Front Subpanel 1 Assemble equipment and locate modules to be removed a Have handy a screwdriver with a size 15 Torx tip Items 1 and 2 b Do the procedure A30 Display Assembly and Supply Fuse page 6 47 Do not remove the display driver board Locate the modules to be removed in the locator diagram Inner Chassis Modules Figure 6 2 page 6 13 2 Orient the oscilloscope Set the oscilloscope so its rear is down on the work surface and its bottom is facing you 3 Remove the front subpanel Remove the six screws securing the front subpanel to the main chassis See Figure 6 24 for screw locations Lift the front subpanel up away from the main chassis to complete the removal 4 Reinstallation Do the following substeps to reinstall the front subpanel and reassemble the remainder of the oscilloscope a Align the front subpanel to the main chassis taking care to ensure that the main chassis slips into its alignment slot on the front subpanel see magnified view Figure 6 24 Then reinstall the six screws removed in step 3 b See the procedure A30 Display Assembly and Supply Fuse page 6 47 to reinstall the display frame assembly and display tube Seethe following procedures in the order listed for instructions for reinstalling the remaining modules Cover and Board Brackets page 6 37 All Processor Display Board page 6 36 m If option 05 is installed A29 Video Tr
26. decrease the time required to adjust the oscilloscope The equipment list starting on page 5 5 lists all test equipment required to adjust this oscilloscope The following topics cover what is required of you when adjusting the oscillo scope and what is done by the software Also the performance of individual adjustments is discussed When using the adjustment software you will not be required to manually adjust any circuits As you run the calibration tests the software adjusts the circuits using external standards you provide in response to prompts on the computer TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures screen Your role then is to provide those test signals and to prompt the computer to continue Since the display assembly and 6139 probe adjustment require manual adjustment of circuit components they are not part of the adjustment software Written procedures for these adjustments start on page 5 6 If you are using the optional P6139A probe do the manual adjustment proce dures found at the end of this section Complete Adjustment complete adjustment is the performance of all adjustments on the TDS 600B Adjustment Software and the TDS 700A Adjustment Software in sequence plus the 6139 probe adjustment if you are using the 6139 probe Throughout this section complete adjustment is used as just defined Individual Adjustments The adjustment software contains thr
27. m To rapidly confirm that the oscilloscope functions and was adjusted properly just do the brief procedures under Self Tests which begin on page 4 5 Advantages These procedures are quick to do require no external equip ment or signal sources and perform extensive functional and accuracy testing to provide high confidence that the oscilloscope will perform properly They can be used as a quick check before making a series of important measurements m To further check functionality first do the Self Tests just mentioned then do the brief procedures under Functional Tests that begin on page 4 7 Advantages These procedures require minimal additional time to perform require no additional equipment other than a standard accessory probe and more completely test the internal hardware of the oscilloscope They can be used to quickly determine if the oscilloscope is suitable for putting into service such as when it is first received m If more extensive confirmation of performance is desired do the Perfor mance Tests beginning on page 4 15 after doing the Functional and Self Tests just referenced Advantages These procedures add direct checking of warranted specifica tions They require more time to perform and suitable test equipment is required See Equipment Required beginning on page 4 16 If you are not familiar with operating this oscilloscope read the TDS 500B TDS 600B amp TDS 700A Reference 070 9382 X X or the TDS
28. wee wee ee 7 1 Table 7 2 Standard Accessories 7 4 Table 7 3 Optional Accessories 7 5 Table 7 4 Accessory Software 7 1 TDS 500B TDS 600B and TDS 700A Service Manual fcc if General Safety Summary Injury Precautions Use Proper Power Cord Avoid Electric Overload Ground the Product Do Not Operate Without Covers Use Proper Fuse Do Not Operate in Wet Damp Conditions Do Not Operate in Explosive Atmosphere Keep Probe Surface Clean Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use the product only as specified Only qualified personnel should perform service procedures To avoid fire hazard use only the power cord specified for this product To avoid electric shock or fire hazard do not apply a voltage to a terminal that is outside the range specified for that terminal This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded To avoid electric shock or fire hazard do not operate this product with covers or panels removed To avoid fire hazard use only the
29. 0202148 DEM 1 COVER FRONT PLASTIC SEE FIG 10 1 14 016 1268 00 1 POUCH ACCESSORY TK2539 2122 063 2028 xx 1 DATA SHEET INSTALLING THE ACCESSORY POUCH TK2548 PER P N INSTRUCTION TDS TLS FAMILIES DP 10 18 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Figure 10 7 Accessories Replaceable Parts List Fig amp Index Num Tektronix Serial No Serial No ber Part Number Effective Discont d 003 1457 01 012 0991 00 012 0991 01 012 1214 00 012 1298 00 012 1388 00 016 0909 01 016 1135 00 016 1145 00 016 0099 00 070 9721 01 070 8432 02 Qty Name amp Description OPTIONAL ACCESSORIES BIT TORX DRIVER MODIFY THE T 20 CABLE INTCON SHLD CMPST GPIB CABLE GPIB LOW EMI 1 METER CABLE INTCON SHLD CMPST IBM TO PRINTER CABLE INTCON RS232C DB25M DB9F SERIAL CABLE ASSEMBLY OSCILLOSCOPE SECURITY CASE CARRYING SOFTSIDED FOR 3002C CASE CARRYING 26 X 22 X 15 HARD TRANSFER HOOD ASSEMBLY TDS SERIES HDW KIT ELEK EQ RACKMOUNTING HDW MANUAL TECH SERVICE TDS500B 600B 700A MANUAL TECH INSTR TDS FAMILY RACKMOUNT TDS 500B TDS 600B and TDS 700A Service Manual Mfr Code TK1465 22526 00779 6D224 TK2500 80009 TK2162 34416 80009 80009 80009 TK2548 Mfr Part Num ber 003 1457 01 81190 020 553577 2 2206 294 9 012138800 0587 2622RW 7T 7B 016114500 016009900 070972101 PER TEK P N 10 19 Mechanical Parts List 10 20 TDS 500B TDS 600B TD
30. 05 1 CA ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M 3109 198 010 OPTION A3 AUSTRALIAN 2 161 0104 06 1 ASSY PWR 3 1 0MM SQ 250V 10A 2 5 M 53109 198 010 OPTION Al EUROPEAN 3 161 0104 07 1 CA ASSY PWR 3 1 0MM SQ 240V 10A 2 5 53109 209010 OPTION A2 UNITED KINGDOM 4 161 0104 08 1 CA ASSY PWR 3 18 AWG 250 10A 98 INCH L 2W733 ORDER BY DESC OPTION A4 NORTH AMERICAN 5 161 0167 00 1 CA ASSY PWR 3 0 75MM SQ 250V 10A 2 5 M 53109 ORDER BY DESC OPTION A5 SWITZERLAND 1 CABLE ASSY PWER 3 18 AWG 92 L STANDARD CABLE SEE FIG 10 1 2 343 0170 00 1 RTNR CA TO CA U W 0 25 OD CABLES 0JROS ORDER BY DESC OPTIONS 1 2 4 5 nudo 1 CLAMP PWER CORD POLYMIDE SEE FIGURE 10 1 3 070 9556 xx 1 ANUAL TECH PROGRAMMER TDS 400A 500B 600B 700A 80009 0709556 070 9719 xx 1 MANUAL TECH USERS TDS 500B 600B 700A 80009 0709719 070 9579 xx 1 MANUAL TECH USERS TDS 500B 600B 700A 80009 0709579 L5 APANESE LANGUAGE 070 9580 xx 1 MANUAL TECH USERS TDS 500B 600B 700A 80009 0709580 OPT L1 FRENCH LANGUAGE 070 9581 1 ANUAL TECH USERS TDS 500B 600B 700A 80009 0709581 OPT L3 GERMAN LANGUAGE 070 9718 xx 1 MANUAL TECH SUPPLEMENT TDS 500B 600B 700A 80009 0709718 OPT L1 L3 L5 L9 LANGUAGE OPTIONS 070 9720 xx 1 MANUAL TECH PERF VERIF TDS 500 600 700 80009 0709720 020 2148 xx 1 MANUAL TECH REFERENCE SET TDS 500B 600B 700A 80009
31. 1 Interconnections Cont TDS 500B TDS 600B and TDS 700A Service Manual 9 3 Diagrams A10 Acquisition CH1 G 4 77 2 77 CH3 Attenuator 77 CH4 77 29 Video Triggers Trigger Option 05 A D Converters A12 FrontPanel 25 Front Panel ON STBY Menu Switches ON STBY Switches Front Panel PF LEDS Front Panel Pots SIGNAL 34 Probe GND Compensation Low Voltage Power Supply Power to All Circuits Floppy 26 Driver A17 Main LV Power Supply A18 Main Converter Control A19 Power Factor Control Figure 9 2 Block Diagram 9 4 TDS 500B TDS 600B and TDS 700A Service Manual Diagrams SIGNAL OUTPUT e 77 AUX TRIGGER e D INPUT 77 MAIN Oo TRIGGER OUTPUT 7 DELAYED Q Oo TRIGGER gt OUTPUT 27 A11 Dram Processor 77 Connector Display 26 Option 05 PORT 15 15 PIN VGA ANALOG OUTPUT Processor System A23 P COMPATIBLE A30 Display Driver CRT Anode Vert Yoke A32 Video VIDEO E LR e Display V1000 System 5 2 Horiz Yoke A31 Shutter FSYNC Driver VIDEO sex o gt L
32. 10X probe Item 16 1 Install the test hookup and preset the oscilloscope controls a Access Inner Probe Tip and Adjustment Ports m The probe tip should be exposed from the procedure Measure Probe Bandwidth If not follow the instructions in Figure 5 5 to expose the probe tip m Follow the instructions in Figure 5 7 to remove the probe body covers TDS 500B TDS 600B and TDS 700A Service Manual 5 15 Adjustment Procedures 5 16 Use a small standard screwdriver to pry between the cover and metal cord connector to pop off cover Repeat for lower cover Figure 5 7 Exposing the Probe Body b Hook up test signal source m Connect the high amplitude output of a calibration generator through a 50 Q precision cable to the input of a tunnel diode pulser See Figure 5 8 m Connect the output of the tunnel diode pulser through a 10X attenuator to CH 1 m Set the triggering level of the tunnel diode pulser to minimum Calibration NE Generator Digitizing Oscilloscope Output 10X Attenuator Tunnel Diode P ulser Precision Cable Figure 5 8 Initial Test Hookup c Initialize the oscilloscope W Press save recall SETUP TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init d Modify the initialized fro
33. 26 pin 17 49V 5 2V 15 V J 26 pin 11 14 7 V 15 3 V 15 V J 26 pin 7 14 7 V 15 3 V Table 6 6 No Load Supply Voltages Measured on J5 and J6 on the A17 Main LV Power Supply Module Supply Lower Limit Upper Limit Ground J 5 or J 6 pin 15 5 1 VA J 6 pin 5 4 95 V 5 25 V 5 1 VB J 6 pin 17 4 95 V 5 25 V 25 V J 6 pin 1 23 5 V 27 5 V 5 V J 5 pin 39 0 59 V 0 81 V 5 1 V J 5 pin 17 0 39 V 0 61 V 15 V J 5 pin 11 1 05 V 1 75 V 15V J5 pin 7 1 05 V 1 75 V Figure 6 29 Power Supply Voltage Measurement Locations TDS 500B TDS 600B and TDS 700A Service Manual 6 63 Troubleshooting This procedure helps you determine whether the color display or the A11 DRAM Processor Display module is bad Is the display legible but the horizontal 153 and or vertical sync do not look ok Power the oscilloscope off and disconnect the cable from J 5 on the A11 DRAM Processor Display module see Figure 6 38 then power back on Does J62 1 on the A11 DRAM Processor Display module see Figure 6 38 have a video signal with the same levels as Figure 6 32 J 5 pins 1 and 2 at 425 V and 5 pins 3 and 4 at 45 1 V On the A11 DRAM Processor Display module probe J 27 but DO NOT REMOVE the cable from the connector The voltages will change if the A11 DRAM Processor Display is not connected to the power su
34. 4 2 Verifying Adjustments and Signal Path Compensation TDS 500B TDS 600B and TDS 700A Service Manual Brief Procedures 2 Return to regular service Press CLEAR MENU to exit the system menus Functional Tests The purpose of these procedures is to confirm that the oscilloscope functions properly The only equipment required is one of the standard accessory probes and to check the file system a 3 5 inch 720 K or 1 44 Mbyte floppy disk oscilloscope provide an extremely low loading capacitance 1 pF to ensure the best possible signal reproduction These probes should not be used to measure signals exceeding 8 volts or errors in signal measurement will be observed Above 40 volts damage to the probe may result To make measurements beyond 10 volts use either the P6139A probe good to 500 volts or refer to the catalog for a recommended probe T CAUTION The optional P6243 and P6245 probes that can be used with this STOP These procedures verify functions that is they verify that the oscilloscope features operate They do not verify that they operate within limits Therefore when the instructions in the functional tests that follow call for you to verify that a signal appears on screen that is about five divisions in amplitude or has a period of about six horizontal divisions etc do NOT interpret the quantities given as limits Operation within limits is checked in Performance Tests which begin on page 4
35. 500B TDS 600B amp TDS 700A User Manual 070 9719 X X These contain instructions that will acquaint you with the use of the front panel controls and the menu system TDS 500B TDS 600B and TDS 700A Service Manual 4 1 Performance Verification Procedures Input Channels vs Model When performing the procedures in this section be aware that some TDS models refer to input channels Ch 3 and Ch 4 as Aux 1 and Aux 2 respectively Where appropriate both names will appear in the procedure for example Ch 3 Aux 1 The channel names for the various TDS models are shown below TDS Model Channel Names TDS 540B 644B 684B 754A and 784A Ch 1 Ch 2 Ch 3 and Ch 4 TDS 520B 620B 680B 724A and 782A Ch 1 Ch 2 Aux 1 and Aux 2 Conventions Throughout these procedures the following conventions apply Each test procedure uses the following general format Title of Test Equipment Required Prerequisites Procedure W Each procedure consists of as many steps substeps and subparts as required to do the test Steps substeps and subparts are sequenced as follows 1 First Step a First Substep m First Subpart m Second Subpart b Second Substep 2 Second Step In steps and substeps the lead in statement in italics instructs you what to do while the instructions that follow tell you how to do it as in the example step below Initialize the oscilloscope by doing Press save recall SETUP Now press the main menu button
36. 700A Service Manual Performance Tests m CHECK that the Lower Limit readout after the oscilloscope stops triggering is within 1 9 us to 2 1 us inclusive W Enter time on test record m Use the keypad to return the Lower Limit to 500 ns and reestablish triggering Press the side menu button Upper Limit then use the general purpose knob to slowly decrease the Upper Limit readout until triggering stops m CHECK that the Upper Limit readout after the oscilloscope loses triggering is within 1 9 us to 2 1 us inclusive m Enter time on test record 4 Disconnect the hookup Disconnect the cable from the generator output at the input connector of CH 1 Check Accuracy Equipment Re Trigger Level or quired Threshold DC Coupled One DC calibration generator Item 9 One BNC T connector Item 7 Two 50 Q precision coaxial cables Item 5 Prerequisites See page 4 15 Digitizing Oscilloscope DC Calibrator Dual Banana to BNC Adapters BNC T Connector 50 Coaxial Cables Figure 4 16 Initial Test Hookup 1 Install the test hookup and preset the instrument controls a Hook the test signal source m Set the output of the DC calibration generator to 0 volts TDS 500B TDS 600B and TDS 700A Service Manual 4 49 Performance Tests 4 50 Connect the output of the DC calibration generator through a dual banana connector followed by a 50 99 precision
37. CHI input of the TDS W Press the 100 FIELD control the fourth TSG121 front panel button from the left of the PAL signal source PAL Signal Source Digitizing Oscilloscope COMPST O OO N zsa Terminator 75 Q Cable Figure 4 26 Jitter Test Hookup b CHECK that the oscilloscope lights up its front panel TRIG D LED and it displays the waveform on screen See Figure 4 27 4 68 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Tek Run 250 5 5 Sample Main Scale 200ns Horizontal Scale Main Scale 50 Pts Div Delayed Scale 50 Pts Div aans 282mV COICOICOICOICO L m s T a S Time Base Position Length Scale Horte 50 500 div COICOSICOICOICOICOSIC Figure 4 27 Jitter Test Displayed Waveform TDS 684B Shown c Press SHIFT then press ACQUIRE MENU d Press the main menu Mode e Select the side menu Average It should be already set to 16 f Pressthe main menu Create Limit Test Template Press the side menu V Limit h Use the keypad to set V Limit to 180 mdiv press 180 SHIFT m then ENTER i Press the side menu OK Store Template j Press MORE k Press the main menu Refl l Press CHI m Press SHIFT then press ACQUIRE MENU n Press the main menu Limit Test Setup Toggle the side me
38. Cable Output COMPST BNC T Connector 50 Cable 75 Q Cable Figure 4 33 Subsequent 60 Hz Rejection Test Hookup m CONFIRM that the TRIG D LED stays lighted and that the waveform on screen is stable In other words be sure the waveform does not move horizontally or vertically Also confirm that the waveform on the screen has one positive pulse and a number of negative pulses See Figure 4 34 m Disconnect all test equipment from the digitizing oscilloscope TDS 500B TDS 600B and TDS 700A Service Manual 4 75 Performance Tests 4 76 Tek Run 1 00MS s Sample Fine Scale 300mV Coupling DC Che J Fine Scale M Fine Scale ag soomV dMso 0us Vid chi i 7 Bandwidth Position Offset Cal Probe Full div 0 div 0v initialized Figure 4 34 60 Hz Rejection Test Result TDS 684B Shown 6 Check Line Count Accuracy a Setup oscilloscope for Line Count Accuracy Test Press WAVEFORM OFF Press Press HORIZONTAL MENU Press the main menu Record Length Press the side menu more until you see the appropriate menu Press the side menu 5000 points in 100divs Press the main menu Horiz Scale div Use the keypad to set the horizontal scale to 200 ns press 200 SHIFT n then ENTER b Check Line Count Accuracy Connect a compos
39. Does the oscill power o al the yes dug V odds 1 i e faul Replace the A10 j isiti pass but sometime later troubleshooting procedure module Acquisition module powers down on its own Yes f Perform the Module Isolation troubleshooting procedure Figure 6 26 Primary Troubleshooting Procedure TDS 500B TDS 600B and TDS 700A Service Manual 6 59 Troubleshooting on again and Replace the observe the LED All DRAM DS1 Does it Figure 6 36 Processor Display only display module 1 8 on again and observe the LED DS1 Does it display E Perform the A16 Low Voltage Power Supply Module Isolation troubleshooting procedure 1 there 0 V on Replace the A17 26 Pin 4 See Main LV Power Supply module Replace the All DRAM Processor Display module Y J28 Pin 100 See Figure Power off the oscilloscope and remove its cabinet using the Rear Cover and Cabinet removal procedure On the A11 DRAM Processor Display module set 510015 eighth switch to the open position on U604 Pins 5 7 9 or 11 ofthe A10 Acquisition module See Figure 6 39 Replace the A15 Attenuator module No No Replace the A10 Acquisition module Does Press S1002 on the first flash 8 then DS1 flash 8 A11 DRAM display a sequence of hex then display th
40. EXECUTE then press the side menu button Ok Confirm Run Test b Make the contrast adjustment m Locate R572 It is one of two adjustments on the left side of the instrument located just ahead of the fan It is the adjustment nearest the front of the oscilloscope m Monitor the luminance at center screen using a J16 photometer and a luminance probe m Adjust R572 CONTRAST for a reading of 50 foot lamberts if the gray display shield is installed adjust for 110 foot lamberts if the shield is missing 4 Restore the oscilloscope to normal operation a Restore the dip switch to the settings that follow Open Closed X X X X X X X X b Power off the oscilloscope See Removal and Installation Procedures in Section 6 to reinstall the cabinet and other modules removed in step 1 Rotation Brightness and Equipment Re One 6X magnifier Item 14 foe Gas EE d aure One J 16 Photometer with a 6503 Luminance Probe Item 15 700A Color Only 1 Access the inside of the oscilloscope See Removal and Installation Procedures in Section 6 to remove the cabinet 2 Adjust the display rotation a Display the Composite test pattern Leave the oscilloscope powered off m Set the DIP switch located near the front of the All DRAM Processor Display as follows 5 22 TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures Switch No Open Closed W Power the oscilloscope m Press S
41. Figure 6 2 page 6 13 2 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its rear is facing you 3 Remove the low voltage power supply a Working from the rear of the oscilloscope remove the two screws securing the low voltage power supply to the rear chassis See Fig ure 6 21 b Now working from the top of the oscilloscope remove the seven screws indicated in Figure 6 21 that mount the supply to the main chassis Grasp the supply at the points indicated in Figure 6 21 and lift the board up out of the oscilloscope to complete removal 4 Reinstallation Do in reverse order substeps 3a through 3c reversing each step to reinstall the low voltage power supply Then see the following procedures to complete the reassembly Cover and Board Brackets page 6 37 All Processor Display Board page 6 36 If option 05 is installed A29 Video Trigger Board page 6 32 A14 DI Bus and Analog Power and Digital Power Cables page 6 29 m Rear Cover and Cabinet page 6 18 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures Rotate the edge of the board upward as indicated to clear the lip of the main chassis when lifting this board out Figure 6 21 A16 Low Voltage Power Supply Removal A30 Display Assembly NOTE The display and the display driver board are a single module and must be a
42. Gain access to the parts to be cleaned by removing easily accessible shields and panels see Removal and Installation Procedures 5 Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate 6 Use hot 120 F to 140 F deionized water to thoroughly rinse them 7 Dry all parts with low pressure deionized air 8 Dry all components and assemblies in an oven or drying compartment using low temperature 125 F to 150 F circulating air Lubrication There is no periodic lubrication required for this oscilloscope TDS 500B TDS 600B and TDS 700A Service Manual 6 7 Maintenance 6 8 TDS 500B TDS 600B and TDS 700A Service Manual E ee Removal and Installation Procedures This subsection contains procedures for removal and installation of all mechani cal and electrical modules Any electrical or mechanical module assembly or part listed in Section 10 of this manual is a module Preparation Please Read AN A List of Modules WARNING Before doing this or any other procedure in this manual read the Safety Summary found at the beginning of this manual Also to prevent possible injury to service personnel or damage to this oscilloscope s components read Installation in Section 2 and Preventing ESD in this section This subsection contains the following items m This preparatory information that you need to properly do the procedures that f
43. IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Table of Contents General Safety Summary Service Safety C Manual Str cture i n E ene seo tics ACER ote Manual Conventions Related Manuals E ae een nak BOR RON ee Introduction 5 4 9 rx e S PES Service Strategy end ee bei eR e d Service Offerings gt ERR AER RR Ae d Before You Specifications Product Description User Interface 5 oet es UR IRR bb AERA DU ng Signal Acquisition System Horizontal System cue o tac b e ERAT ER EROS Trigger Systeme stet OE EOM D EC a boe Eres Acquisition Control cu e o EE UE es On Board User Assistance Measurement Assistance SIOrAge as rau sae S b a RU MR ERR EEUU Display 5o Ouest a I Re E to a CR tdm Nominal Traits socs ever eek re os deise esee 4 Warranted Characteristics Typical Characteristics
44. Information NOTE Read all information and heed all warnings in this subsection before connecting the oscilloscope to a power source WARNING AC POWER SOURCE AND CONNECTION The oscilloscope operates from a single phase power source It has a three wire power cord and two pole three terminal grounding type plug The voltage to ground earth from either pole of the power source must not exceed the maximum rated operating voltage 250 volts Before making connection to the power source be sure the digitizing oscilloscope has a suitable two pole three terminal grounding type plug GROUNDING This instrument is safety Class 1 equipment IEC designation All accessible conductive parts are directly connected through the grounding conductor of the power cord to the grounded earthing contact of the power plug WARNING The power input plug must be inserted only in a mating receptacle with a grounding contact where earth ground has been verified by a qualified service person Do not defeat the grounding connection Any interruption of the grounding connection can create an electric shock hazard For electric shock protection the grounding connection must be made before making connection to the instrument s input or output terminals A power cord with the appropriate plug configuration is supplied with each Digitizing Oscilloscope Table 2 1 gives the color coding of the conductors in the power cord If you require a po
45. Press SHIFT then press the front panel DELAYED TRIG button Press the main menu button Level c Measure the test signal Press the side menu button SET TO 5046 Read the measurement results the side or main menu below the label Level d Check against limits Do the following subparts in the order listed CHECK that the Level readout in the side menu is within 9 863 V to 10 137 V inclusive for the TDS 600B or is within 9 9393 V to 10 1147 V inclusive for the TDS 500 700 Enter voltage on test record Press the main menu button Slope then press the side menu button for negative slope See icon at left Press the main menu button Level Repeat substep c CHECK that the Level readout in the side menu is within 9 863 V to 10 137 V inclusive for the TDS 600B or is within 9 9393 V to 10 1147 V inclusive for the TDS 500 700 Enter voltage on test record 4 Disconnect the hookup a First set the output of the DC calibration generator to 0 volts b Disconnect the cable from the generator output at the input connector of CH 1 4 52 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Sensitivity Edge Trigger Equipment Re DC Coupled quired One sine wave generator Item 19 or optionally items 25 and 26 Two precision 50 O coaxial cables Item 5 One 10X attenuator Item 1 One BNC T connector Item 7 One 5X attenuator Item 2 Prerequisites See page 4 15 1 I
46. Press the main menu button Signal Path then press the side menu button OK Compensate Signal Paths Wait Signal path compensation may take five minutes on the TDS 500 700 and fifteen minutes on the 600B to run While it progresses a clock icon shown at left is displayed on screen When compensation completes the status message will be updated to Pass or e f g Fai h lin the main menu See step h Confirm signal path compensation returns passed status Verify that the word Pass appears under Signal Path in the main menu See Figure 4 2 Tek Run 100kS s E ion SPC corrects for BC Signal Path Compensat inaccuracies caused bv temperature variations and or long term drift SPC be run time after the oscilloscope is should be run whenever the oscilloscope s ambient temperature has changed by more than 5 C or once a week if vertical settings of 5rmV div or less are used Config System iCal Diag Err Input signals AC components Disconnect or otherwise these signals prior to running SPC i ke 15 minutes to run oltage Frequency ulse Reference Response Trigger Pass Pass Pass 21 Signal Path ompensatio OK Compensate 4 Signal Paths CIJENE cc 3 2 Verify Pass Verify Pass OIOIOIOIO Figure
47. SELECT Turn the General Purpose knob to adjust the right cursor for a cursor delta reading of 6 780us Use the HORIZONTAL POSITION knob to position the right cursor to center screen Verify that the cursor is positioned on a positive slope of the burst signal See Figure 4 37 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Tek Run 250MS s 2 Function Mode ime p Units V Bars indep seconds Cursor Function Paired COICOICOICOICO S2mV amp 200ns Vid Chi 1 7 7 C Figure 4 37 Line Count Accuracy Correct Result Waveform Disconnect all test equipment TSG 121 from the digitizing oscilloscope Turn off cursors by pressing CURSOR then the main menu Function button and finally Off from the side menu 7 Check the Sync Duty Cycle a Setup digitizing oscilloscope for Sync Duty Cycle Test Press TRIGGER MENU Press the Standard pop up to select FlexFmt Trigger Type should already be set to Video Press the main menu Setup Press the side menu Field Rate Use the keypad to set the field rate to 60 05 Hz press 60 05 then ENTER Press the side menu Lines Use the keypad to set the field rate to 793 lines press 793 then ENTER TDS 500B TDS 600B and TDS 700A Service Manual 4 79 Performance Tests
48. Save Wfm Ch 1 W Press the side menu button To Ref 1 to save the probe compensation signal in reference 1 m Disconnect the cable from CH 1 and the clips from the probe compensation terminals m Press MORE then press the main menu button Ref 1 to displayed the stored signal m Press CH 1 d Hook up the DC standard source m Set the output of a DC calibration generator to 0 volts m Connect the output of a DC calibration generator through a dual banana connector followed by a 50 precision coaxial cable to one side of a BNC T connector See Figure 4 24 m Connect the Sense output of the generator through a second dual banana connector followed by a 50 precision coaxial cable to 4 64 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests the other side of the BNC T connector Now connect the BNC T connector to CH 1 See Figure 4 24 Digitizing Oscilloscope DC Calibrator Dual Banana to BNC Adapters BNCT Connector 50 Coaxial Cables Figure 4 24 Subsequent Test Hookup e Measure amplitude of the probe compensation signal m Press SHIFT then press ACQUIRE MENU Press the side menu button AVERAGE then enter 16 using the keypad or the general purpose knob m Adjust the output of the DC calibration generator until it precisely overlaps the top upper level of the stored probe compensation signal This value will be near 500 mV m Record the sett
49. System The acquisition system amplifies the input signals samples them converts them to digital signals and controls the acquisition process under direction of the processor system The acquisition system includes the trigger acquisition timing and acquisition mode generation and control circuitry Voltage Controlled Oscillator VCO Master clocks for the acquisition system are generated by the circuitry on the A10 Acquisition board The circuitry makes up a phase locked loop The master clock is divided down by the A10 Acquisition circuitry under control of the processor system D1 Bus The acquisition system passes the digital values representing the acquired waveform through the A14 D1 Bus to the A11 DRAM Processor Dis play board This happens after a waveform acquisition is complete if the digital signal processor in the processor system requests the waveform Processor System The processor system contains a 68020 microprocessor that controls the entire instrument This system also includes the firmware and a GPIB interface You can reprogram the firmware from a remote controller using the GPIB and an external software package The processor also includes a digital signal processor This signal processor processes each waveform as directed by the system processor Waveforms and any text to be displayed are passed on to the display system The All DRAM Processor Display board contains both the processor and display systems Display S
50. TDS 500B TDS 600B and TDS 700A Service Manual Mfr Code TK1163 TK2432 TK1163 61935 61935 75915 61857 0 9P9 80009 0 ROS 80009 80009 80009 TK0488 80009 80009 TK1163 TK1163 80009 80009 80009 80009 80009 80009 80009 80009 80009 0 05 0 05 0 05 TKOIK Mfr Part Num ber 200 3695 02 ORDER BY DESC ORDER BY DESC FEK 031 1666 FEK 031 1663 312006 ET 5 AMP 650 3039 00 367024701 ORDER BY DESC 431039901 348111002 348125401 ORDER BY DESC 348110901 200369601 ORDER BY DESC ORDER BY DESC 334 9095 00 334 9095 00 334 9095 00 334 9095 00 334 9097 00 334 9098 00 334 9096 00 334 9095 00 334 9095 00 334 9289 00 334 9290 00 334 8551 00 ORDER BY DESC 10 5 Mechanical Parts List Replaceable Parts List Cont Fig amp Index Num Tektronix Serial No Serial No Mfr Mfr Part Num ber Part Number Effective Discontd Qty amp Description Code ber 214 4287 01 1 ACTUATOR ELASTOMER MAT FRONT PANEL RBR TKOIK ORDER BY DESC for use in TDS 500B and 700A 18 366 2114 00 2 KNOB LARGE DETENTED TK1163 ORDER BY DESC 19 366 2111 00 3 KNOB SMALL FLUTED TK1163 ORDER BY DESC 20 650 2927 00 1 REPLACEABLE AS DISPLAY FRAME WITH FLEX 80009 650292700 21 386 5954 00 1 PANEL INPUT P LASTIC ATTE NUATOR 80009 386595400 22 614 0929 00 1 FNT PANEL ASSY 80009 614092900 TDS784A ONLY A12 EXCHANGE ITEM 614 0918 02 1 FNT PANEL A
51. and Analog Power and Digital Power Cables page 6 29 Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 Rear Cover and Cabinet page 6 18 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures Securing A14 D1 Bus Screws 6 AU s TRIGGER _ MAIN Digital Power Cable TRIGGER OUTPUT Analog DELAYED Power Cable TRIGGER Securing Screws 5 Figure 6 18 A10 Acquisition Board Removal TDS 500B TDS 600B and TDS 700A Service Manual 6 41 Removal and Installation Procedures Floppy Disk 1 Assemble equipment and locate modules to be removed Optional on the TDS 500B 620B and a Have handy a screwdriver with a small Phillips head 680 b Locate the modules to be removed including those listed under Additional Modules Removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 2 Do the procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 3 Orient the oscilloscope Set the oscilloscope so its top is down on the work surface and its front is facing you 4 Remove the Floppy Disk Use Figure 6 19 as a guide a Unplug the J38 floppy driver connector ribbon interconnect cable that connects the disk drive to the A11 Processor Display board b Remove the disk drive by unscrewing the two retaining Phillips screws on the sides of the disk Then
52. and Installation Procedures Fuse Cap Line Fuse Handle Handle Cap Pad f ootPa 2 x Frame Flip Stand TS E b di Front Panel Knobs EMI Gasket Menu Buttons QQ 00000 Q Attenuator Cover A12 Front Panel pue Assembly Trim Ring Front Cover Figure 6 1 External Modules 6 12 TDS 500 TDS 600B TDS 700A Service Manual Removal and Installation Procedures All DRAM Processor Display Board Rear Chassis Top Cover A23 SerPar Board Board Bracket Analog and Digital Power Cables A10 Acquisition Board Figure 6 2 Outer Chassis Modules TDS 500B TDS 600B and TDS 700A Service Manual 6 13 Removal and Installation Procedures A30 Display Assembly A16 Power Supply m wn Figure 6 3 Inner Chassis Modules TDS 500B TDS 600B and TDS 700A Service Manual 6 14 Removal and Installation Procedures Access Procedure Begin with this procedure when you have identified a module to be removed for service and have read General Instructions found earlier in this section 1 Locate module to be removed a Find the module to be removed in the module locator diagrams Figures 6 1 through 6 3 Once the module is found note from the title of the figure whether the module 15 an external outer chassis mounted or inner cha
53. chassis Now remove the five screws securing the rear chassis to the main chassis and separate the two chassis See Figure 6 20 for screw location 6 Reassembly Do the following substeps a Reassemble the chassis Align the rear chassis to the main chassis and reinstall the five screws removed in step 5 align the front subpanel to the main chassis and reinstall the six screws removed in step 5 NOTE The following substeps refer you to procedures for installing each module removed When reinstalling the modules ignore any instructions that require connecting a cable or bus to an module that you have not yet installed The necessary connections will be made when you install the missing module later b Reinstall the inner chassis modules Do in the order listed the following d procedures When doing these procedures do their steps in reverse order These procedures are found under Procedures for Inner Chassis Modules which start on page 6 46 m 430 Display Assembly and Supply Fuse page 6 47 W A16 Low Voltage Power Supply page 6 46 Reinstall the outer chassis modules Do in the order listed the following procedures When doing these procedures do their steps in reverse order These procedures are found under Procedures for Outer Chassis Modules which start on page 6 29 Cover and Board Brackets page 6 37 All Processor Display Board page 6 36 m 23 SerPar Board page 6 31 m A29 Video Trig
54. do this repeatedly press the side menu button more until High and Low appear in the side menu their icons are shown at the left Press both side menu buttons High and Low c Check Main Trigger output against limits CHECK that the Ch2 High readout is 22 5 volts and that the Ch2 Low readout is lt 0 7 volts See Figure 4 21 Enter high and low voltages on test record Press VERTICAL MENU then press the main menu button Coupling Now press the side menu button to toggle it to the 50 2 setting CHECK that the Ch2 High readout is 21 0 volt and that the Ch2 Low readout lt 0 25 volts Enter high and low voltages on test record TDS 500B TDS 600B and TDS 700A Service Manual 4 59 Performance Tests Check output 4 60 Tek Run 250 5 5 Average Select Measurement EH Remove Gating T Reference Measrmnt Setup Snapshot for Ch2 Measrmnt OFF Histogram Levels 4 100 77 200 6 Chi amv Figure 4 21 Measurement of Main Trigger Out Limits d Check Delayed Trigger output against limits See Figure 4 21 Move the precision 50 cable from the rear panel Main Trigger Output BNC to the rear panel Delayed Trigger Output BNC CHECK that the Ch2 High readout is 21 0 volt and that the Ch2 Low readout lt 0 25 volts Enter high and low voltages on test record Pre
55. eR 4 16 TDS 600B Test Record 2 2 22 252224222 ee Er 4 19 TDS 500 700 Test Record 4 23 Signal Acquisition System Checks 4 27 Time Base System Checks 4 43 Trigger System Checks 4 45 Output Signal 8 4 58 Option 05 Video Trigger Checks 4 67 Sine Wave Generator Leveling Procedure 4 84 Adjustment Procedures Requirements for Performance 5 1 icc e pL ECL CC E reese E UR 5 2 Equipment 5 5 Adjustment Instructions 5 6 Probe Adjustment for the P6139A 5 10 Display Assembly 5 20 Maintenance Related Maintenance Procedures 6 1 Preparation d deed etie eres 6 2 Inspection and Cleaning 6 4 Removal and Installation Procedures 6 9 Preparation Please Read 6 9 Access Procedure ue cR
56. function when turned or pushed Push HELP again to exit help mode To get help information on a menu item display the menu desired if you are in help mode exit help first Push HELP Now the menu buttons display informa tion about their function when pushed Push the SHIFT then the STATUS front panel buttons to display the status menu You will find messages reflecting the state of the acquisition system whether it is running or stopped and if it is stopped why as well as setup related information TDS 500B TDS 600B and TDS 700A Service Manual Operating Instructions How to Set Functions Most functions can be set either by using or two front panel button s or knob s or by pushing a front panel button to use a main menu and then a side menu button to set the function The following steps illustrate both procedures 1 Locate the block that contains the function to be set Vertical function controls Access all Horizontal function controls Trigger function controls vertical functions and inputs from Access all horizontal functions Access all trigger functions this front panel control block from this front panel block from this front panel block SAVE RECALL WAVEFORM APPLICATION MENU 34 ACQUIRE MENU MEASURE HARDCOPY RUN STOP SELECT cuum UTILITY DISPLAY ey DD S pecial function controls CAUTOSET Access all functions except ve
57. in a secure place Software Based Equipment Re All items that are listed for S oftware based Adjustments under Adjustments quired Purpose in Table 5 4 starting on page 5 5 1 Hook up the oscilloscope a Connect the GPIB cable Item 6 to the GPIB port at the computer rear panel When multiple GPIB cards are installed connect to the GPIBO card TDS 500B TDS 600B and TDS 700A Service Manual 5 7 Adjustment Procedures b c Connect the GPIB cable Item 6 to the GPIB port at the oscilloscope rear panel Power on the oscilloscope 2 Setup the oscilloscope a b c d Press SHIFT then press UTILITY Repeatedly press the main menu button System until I O is highlighted in the pop up menu Press the side menu button TALK LISTEN Use the keypad to set any address between 0 and 29 3 Let the oscilloscope warm up Allow a 20 minute warm up period before you begin step 4 4 Start the adjustment software a b Change drives to your hard drive Change directories to TDS600 ADJ for any TDS 600B oscilloscope or TDS700 ADJ for any TDS 500B or 700A oscilloscope Type ADJ600 for any TDS 600B oscilloscope or type ADJ700 for any TDS 500B or 700A oscilloscope Follow the instructions as prompted on your computer screen This will include the actions listed in step 5 shown below 5 Enable the adjustment constants to be written when prompted on your computer screen in step 4 abo
58. menu 18 of subfunctions Example Push Type 17 Note the pop up menu for Type is set to Edge All the main menu buttons to the right of the pop up menu are labeled with subfunctions of Edge Pushing the button that popped up the menu 17 toggles through the pop up menu choices Example Repeatedly push Type to move through the pop up menu Notice the other main menu button labels change accordingly Push Type to move back to Edge Complete the setting of the desired mode by selecting from the main menu and the side menu that results Example Push Mode amp Holdoff 16 and then push Normal 15 TDS 500B TDS 600B and TDS 700A Service Manual Operating Instructions 2 Setupa function using the general purpose knob 20 The examples of possible menu selections in the substeps that follow assume you have pushed TRIGGER MENU 19 SELECT TeK Stopped 29898 Acquisitions Trigger Level 20mv t T E Level Level 4 Set to TTL Set to ECL Set to 50 MM s00mvv P M5 00us Chi F 20mV Source Coupling Slope Level ode Type f amp chi DC nodo os a Pushing some main menu buttons displays a side menu with labels containing readouts that can be varied Example Push Level 21 b Pushing the side menu button Level assigns the general purpose knob to control the readout appearing
59. on four channels simultaneously TDS 620B 5 Samples sec to 2 5 GSamples sec on two channels simultaneously TDS 520B and 724A 5 Samples sec to 1 GSamples sec when acquiring 1 channel to 500 MSamples sec when acquiring 2 channels TDS 540B and 782A 5 Samples sec to 2 GSamples sec when acquiring 1 channel to 1G Sample sec when acquiring 2 channels or for TDS 540B only to 500 MS amples sec when acquiring 3 or 4 channels TDS 540B with option 1G 5 Samples sec to 1 GSamples sec when acquiring 1 channel to 1G Sample sec when acquiring 2 channels orto 500 MSamples sec when acquiring 3 or 4 channels TDS 754A 5 Samples sec to 2 GSamples sec when acquiring 1 or 2 channels to 1 GSamples sec when acquiring 3 or 4 channels TDS 784A 5 Samples sec to 4 GSamples sec when acquiring 1 channel to 26 Sample sec when acquiring 2 channels or to 1 GSamples sec when acquiring 3 or 4 channels TDS 600B 10 GSamples sec to 250 GSamples sec TDS 520B 540B 724A and 754A 1 GSamples sec to 100 GSamples sec TDS 782A and 784A 2 GSamples sec to 250 GSamples sec TDS 600B 0 2 ns div to 10 s div TDS 500B 724A and 754A 0 5 ns div to 10 s div TDS 782A and 784A 0 2 ns div to 10 s div 500 samples 1000 samples 2500 samples 5000 samples 15000 samples The TDS 520B 724A and 782A also offer 50000 samples and with option 1M 75000 100000 130000 1 or 2 channels or 250000 1 channel samples The TDS 540B 754A and 784A also offer 50000 samples a
60. press UTILITY m Repeatedly press the main menu button System until Diag Err is highlighted in the pop up menu m Repeatedly press the main menu button Area until Display is highlighted in the pop up menu m Repeatedly press the side menu button until Composite appears in the side menu Push Composite Press the main menu button EXECUTE then press the side menu button Ok Confirm Run Test b Make the brightness adjustment 5 20 TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures Locate R569 BRIGHTNESS It is one of the two adjustments on the left side of the instrument located just ahead of the fan It is the adjustment nearest the fan W Observe the luminance patches using a 6X magnifier m Adjust R569 BRIGHTNESS until the background raster lines in the 5 luminance patch see Figure 5 11 just disappear while the lines in the 10 luminance patch are just visible when both are viewed through the magnifier 10 Patch 5 Patch Figure 5 11 Five and Ten Percent Luminance Patches 3 Adjust the display contrast a Display the White Field test pattern Press the center main menu button to display the main menu Press the main menu button Tests m Repeatedly press the side menu button until White Field appears in the side menu Push White Field TDS 500B TDS 600B and TDS 700A Service Manual 5 21 Adjustment Procedures W Press the main menu button
61. pull out the disk 6 42 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures Figure 6 19 Floppy Disk Removal 5 Reinstallation Do in reverse order substeps 4b then 4a to reinstall the floppy disk Then see the following procedures in the order listed to complete reassembly of the oscilloscope m Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 W Rear Cover and Cabinet page 6 18 TDS 500B TDS 600B and TDS 700A Service Manual 6 43 Removal and Installation Procedures Rear Chassis 1 Assemble equipment and locate modules to be removed a Have handy a screwdriver with a size 15 Torx tip Items 1 and 2 b Locate the modules to be removed including those listed under Additional Modules Removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 Install the front cover if it s not already installed 2 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its rear is facing you 3 Remove the rear chassis Use Figure 6 20 as a guide when doing the following substeps a Unplug the GPIB interconnect cable at J35 of the processor display board b Unplug the video cable at J51 of the processor display board c Remove 6 screws securing the rear chassis to the main chassis and the two screws securing it to the low voltage power supply shield d Liftthe rear chassis up s
62. test signal Monitor the CH 1 Pk Pk readout while you set the output of the generator for a 3 0 V 6 division 6 MHz reference signal Set the horizontal SCALE to 1 ns and set the frequency of the generator to 500 MHz Read the measurement results at the CH 1 Pk Pk readout on screen b Check against limits CHECK that the CH 1 Pk Pk readout is greater than or equal to 2 1 V 3 Disconnect the hookup a Unplug the probe from BNC to probe tip adapter 5 14 TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures b Ifsubstep 2b was passed the probe adjustment is finished Reverse the instructions in Figure 5 5 page 5 13 to reinstall the retractable hook probe tip Ifsubstep 2b was not passed leave the probe tip exposed Remove the probe from CH 1 and go on to the next procedure Adjust the Probe High Frequency Response Adjust the Probe High Do not perform this procedure until you have first completed the procedures Frequency Response Compensate the Probe and Measure Probe Bandwidth on pages 5 10 and 5 12 respectively Do not perform this procedure if you have successfully completed Measure Probe Bandwidth Probe adjustment is complete Equipment Re One calibration generator Item 10 quired One 50 precision cable Item 8 One tunnel diode pulser Item 17 One BNC female to female adapter Item 1 One BNC to probe adapter Item 2 One 10X attenuator Item 4 One P6139A
63. the limits listed for the current vertical scale setting and position offset generator settings Enter value on test record 4 32 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Repeat substeps c through f until all vertical scale settings listed in Table 4 3 are checked for the channel under test g Testall channels Repeat substeps a through f for all four channels 3 Disconnect the hookup a Set the generator output to 0 V b Disconnect the cable from the generator output at the input connector of the channel last tested Check Analog Bandwidth Equipment Re One sine wave generator Item 19 quired One level meter and power sensor Item 20 One power splitter Item 21 One female N to male BNC adapter Item 24 Four male N to female BNC adapters Item 23 Two 50 precision cables Item 5 Two 10X attenuators Item 1 Optional One high frequency leveled sine wave generator and its leveling head Item 26 replaces items 19 20 21 23 24 and 5 Prerequisites See page 4 15 1 Install the test hookup and preset the instrument controls a Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup then press the side menu button OK Confirm Factory Init b Modify the default settings Press TRIGGER MENU Press the main menu button Coupling Then press the side menu button Noise Rej Turn the horizontal SCALE knob to 50 n
64. the module Select the extended diagnostics menu and run all the test suites the discussion of the Diagnostics on page 6 57 explains how to do this Do the Processor Acq tests pass now There is a problem in the communication link between the A10 Acquisition and the A11 DRAM Processor Display module The A10 Acquisition most likely failed so replace this module Run the Extended Diagnostics again Do the Processor Acq tests pass now Replace the All DRAM Processor Display module Figure 6 33 Processor Acquisition Troubleshooting Procedure 6 66 TDS 500B TDS 600B TDS 700A Service Manual Troubleshooting This procedure helps you determine if the A11 DRAM Processor Display or the A12 Front Panel module is bad the cable from the A11 DRAM Connect the cable and then Processor Display module to perform the Primary the A12 Front Panel module troubleshooting procedure securely connected Power off and remove the cable from J 2 on the A11 pins dramatically DRAM P rocessor Display decrease when th module Probe P2 pins 10 ON STBY button and 8 with an ohm meter is toggled Onthe DRAM Is the Processor Display ON STBY module probe 26 button working pins 3 and 5 with correctly an ohm meter see Figure 6 36 the resistance between these two pins Power off the oscilloscope remove the cable Yes
65. the sample interval and T is the displayed rise time TDS 600B For the averaged condition 1 4 lt T W x 40 where W is the Waveform Interval as described elsewhere in these specifications TDS 600B Extra error in the measurement will occur for two channel measurements due to channel to channel skew This is described elsewhere in these specifications Time Measurement Accuracy TDS 600B 0 20 x sample interval 100 ppm x Reading 0 05 x Wi TDS 600B example at 5 GS s 5 ns div measuring a 40 ns wide pulse accuracy 40 ps 4 ps 5 ps 2 49 ps TDS 500B 700A gt 0 15 sample interval 25 ppm x Reading t div 1000 TDS 500B 700A example at 4 65 5 accuracy 37 5 ps TDS 6008 10 ps 100 ppm x Reading 0 25 x Wi TDS 500B 700A 20 ps 25 ppm x Reading t div 1000 Calculated Rise Time TDS 60082 620 amp 644 680 amp 684 Volts Div Setting Rise Time Rise Time 10 mV div 1 V div 900 ps 450 ps 5 mV div 9 95 mV div lns 600 ps 2 mV div 4 98 mV div 1 5 ns 750 ps 1 mV div 1 99 mV div 1 8 ns 900 ps Calculated Rise Time 5208 540B 724A 782 amp 764A TDS 500B 700A2 Volts Div Setting 754A Rise Time Rise Time 10 mV div 1 V div 800 ps 400 ps 5 mV div 9 95 mV div 800 ps 530 ps 2 mV div 4 98 mV div 800 ps 600 ps 1 mV div 1 99 mV div 890 ps 800 ps Effective Bits TDS 600B Input Frequency Effective Bits The chart on the
66. 009 80009 80009 80009 80009 80009 80009 TK2597 80009 TK1163 TK1163 0J9P9 80009 Mfr Part Num ber ORDER BY DESC 119 4615 00 671318200 ORDER BY DESC 334 7966 02 28 R306 1 679243700 ORDER BY DESC 386 6182 00 205818 2 0098 0564 09 03 ORDER BY DESC 671284700 671284800 671373900 671374400 671331400 671346201 671395300 671394900 671374001 259010101 343008800 ORDER BY DESC ORDER BY DESC ORDER BY DESC 334 9110 00 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Figure 10 2 Outer Chassis Modules TDS 500B TDS 600B and TDS 700A Service Manual 10 9 Mechanical Parts List Replaceable Parts List Fig amp Index Num Tektronix Serial No Serial No Mfr Mfr Part Num ber Part Number Effective Discontd Qty Name amp Description Code ber 3 1 640 0077 04 1 DISPLAY MODULE TDS FAMILY FULL COLOR 80009 640 0077 03 A30 TDS 644B 684B amp 700A ONLY 640 0071 03 1 DISPLAY MONOCHR 7 INCH 80009 640 0071 01 A20 TDS 520B 540B 620B amp 680B ONLY 378 0366 01 1 FILTER LT CRT 6 525 X 5 225 ESP 11536 378 0366 01 TDS 520B 540B 620B amp 6808 ONLY 386 6211 02 1 RETAINER FILTER DUST SEAL ASSY LEXAN TK1163 386 6211 02 TDS 520B 540B 620B amp 680B ONLY 2 348 1300 00 2 SHLD GSKT ELEK 3 165 L CLIP ON 30817 0098 0564 09 03 3 620 0063 04 1 POWER SUPPLY 400W 5V 12A 5 1V 22A 15V 1 5A 1GM54 620 0063 02 A16 EXCHANGE ITEM
67. 00B and TDS 700A Digitizing Oscilloscopes The Adjustment Procedures are divided into six subsections m General information about adjusting the TDS 500B 600B and 700A Digitizing Oscilloscopes m A list of equipment required to perform the adjustments m The written procedures for installing and using both the TDS 600B Adjustment Software and the TDS 700A Adjustment Software The TDS 700A Adjustment Software works with both the TDS 500B and the TDS 700A oscilloscopes The TDS 600B and the TDS 700A Adjustment Software two disks included with this manual The material found in the subsections listed above should be read before using the adjustment software m A written procedure for manually adjusting the optional P6139A probe W A written procedure for manually adjusting the display assembly This procedure is used to return the digitizing oscilloscope to conformance with its Warranted Characteristics as listed in Section 1 Specification It can also be used to optimize the performance of the oscilloscope As a general rule these adjustments should be done every 2000 hours of operation or once a year if the oscilloscope is used infrequently Requirements for Performance Personnel Warm Up Period Before you do this procedure you need to address the following requirements This procedure is only to be performed by trained service technicians This oscilloscope requires a 20 minute warm up time in a 20 C to 30 C en
68. 10 ms or slower The minimum signal levels required for stable logic or pulse triggering of an acquisition or for stable counting of a DC coupled events delay signal Also see the footnote for Sensitivity Edge Type Trigger DC Coupled in this table Stable counting of events is counting that misses no events and produces no extra phantom events The minimum signal levels required for stable runt pulse triggering of an acquisition Also see the footnote for Sensitivity Edge Type Trigger DC Coupled in this table Stable counting of events is counting that misses no events TDS 500B TDS 600B and TDS 700A Service Manual 1 27 Typical Characteristics 6 The minimum signal levels required for stable pulse width or glitch triggering of an acquisition Also see the footnote for Sensitivity Edge Type Trigger DC Coupled in this table Stable counting of events is counting that misses no events 7 For Logic time between channels refers to the length of time a logic state derived from more than one channel must exist to be recognized For Events the time is the minimum time between a main and delayed event that will be recognized if more than one channel is used 8 For Slew Rate Triggering this is the minimum transition time defined to be the time the user s signal spends between the two trigger threshold settings 1 28 TDS 500B TDS 600B and TDS 700A Service Manual Installation Supplying Operating Power AN A Power Cord
69. 11 CSA 1010 Safety Certification Compliance Temperature operating 5 to 40 C Altitude maximum operating 200 meters Equipment Type Test and Measurement Safety Class Class as defined in IEC 1010 1 Annex grounded product Overvoltage Catregory Overvoltage Category Il as defined in IEC 1010 1 Annex J Pollution Degree Pollution Degree 2 as defined in IEC 1010 1 Note Rated for indoor use only Table 1 15 Certifications and Compliances EC Declaration of Conformity Meets intent of Directive 89 336 EEC for Electromagnetic Compatibility and Low Voltage Directive 73 23 ECC for Product Safety Compliance was demonstrated to the following specifications as listed in the Official J ournal of the European Communities EMC Directive 89 336 EEC EN 55011 Class A Radiated and Conducted Emissions EN 55011 Class B Radiated and Conducted Emissions EN 50081 1 Emissions EN 55022 Class B Radiated and Conducted Emissions EN 60555 2 AC Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity IEC 801 5 Power Line Surge Immunity Low Voltage Directive 73 23 EEC EN 61010 1 Safety requirements for electrical equipment for measurement control and laboratory use EN 61010 2 031 1994 Particular requirements for hand held probe assemblies for electrical measurement and test TDS 500B TDS 600B and TDS
70. 15 STOP DO NOT make changes to the front panel settings that are not called out in the procedures Each verification procedure will require you to set the oscilloscope to certain default settings before verifying functions If you make changes to these settings other than those called out in the procedure you may obtain invalid results In this case just redo the procedure from step 1 When you are instructed to press a menu button the button may already be selected its label will be highlighted If this is the case it is not necessary to press the button TDS 500B TDS 600B and TDS 700A Service Manual 4 7 Brief Procedures Verify All Input Channels Equipment Re One probe such as the P 6243 P6245 or P6139A quired Prerequisites None 1 Install the test hookup and preset the oscilloscope controls a Hook up the signal source Install the probe on CH 1 Connect the probe to PROBE COMPENSATION SIGNAL on the front panel connect the probe ground typically black to PROBE COMPENSATION GND If using a P6243 or P6245 probe you may want to attach a Y lead connector and two SMD KlipChips as shown in Figure 4 3 Figure 4 3 Universal Test Hookup for Functional Tests TDS 600B Shown b Initialize the oscilloscope W Press save recall SETUP Press the main menu button R
71. 25 V 5 Div position setting 10 V offset 1 V Vert scale setting 18 2425 V 17 7575 V 5 Div position setting 10 V offset CH2 5 mV Vert scale setting 1 0355 V t 1 0445V 5 Div position setting 1 V offset CH2 5 mV Vert scale setting 1 0445 V 1 0355 V 5 Div position setting 1 V offset CH2 200 mV Vert scale setting 11 5195 V 11 6805 V 5 Div position setting 10 V offset CH2 200 mV Vert scale setting 11 6805 V 11 5195 V 45 Div position setting 10 V offset TDS 500B TDS 600B and TDS 700A Service Manual 4 23 Performance Tests TDS 500B 700A Test Record Cont Instrument Serial Number Certificate Number Temperature RH Date of Calibration Technician TDS 500B 700A Performance Test Minimum Incoming Outgoing Maximum CH2 1 V Vert scale setting 17 7575 V t 18 2425 V 5 Div position setting 10 V offset CH2 1 V Vert scale setting 18 2425 V 17 7575 V 5 Div position setting 10 V offset CH3 5 mV Vert scale setting 1 0355 V 1 0445 V orAX1 5 Div position setting 1 V offset CH3 5 mV Vert scale setting 1 0445 V 1 0355 V 5 position setting 1 V offset CH3 200 mV Vert scale setting 11 5195 V 11 6805 V orAX1 5 Div position setting 10 V offset CH3 200 mV Vert scale setting 11 6805 V 11 5195 V orAX1 5 Div position setting 10 V offset CH3 1 V Vert scale setting 17 7575 V 18 2425 V orAX1 5 Div position
72. 4B 684B 724A 754A 782A 784A CIRCUIT BD ASSY MONO PROCESSOR DISPLAY A11 EXCHANGE ITEM TDS 520B 540B 620B 680B CHASSIS SCOPE REAR MARKER IDENT MKD W CONN IDENT REARBNC CONN RF JACK BNC PNL 50 OHM FEMALE CIRCUIT BD ASSY RS232 CENTRONIC OPTION 13 ON TDS 520B 540B 620B amp 680B BRACKET CKT BD PLASTIC REAR PLATE REAR ALUMINUM RS232 CENTRONIC OPTION 13 ON TDS 520B 540B 620B amp 680B PLATE REAR STANDARD TDS 520B 540B 620B amp 680B WITHOUT OPTION 13 CONN HARDWARE DSUB J ACK SCREW OPTION 13 ON TDS 520B 540B 620B amp 680B SHLD GSKT ELEK 3 165 L CLIP ON SCR ASSEM WSHR 6 32 X 0 375 PNH STL T 15 CIRCUIT BD ASSY D1 BUS A14 EXCHANGE ITEM CIRCUIT BD ASSY D1 BUS A14 0PT 05 EXCHANGE ITEM CIRCUIT BD ASSY ACQUISITION TDS 5408 ONLY CIRCUIT BD ASSY ACQUISITION TDS 520B amp 724A ONLY CIRCUIT BOARD ACQUISITION TDS620B 644B ONLY CIRCUIT BOARD ACQUISITION TDS 680B 6848 ONLY A10 EXCHANGE ITEM KT BD ASSY ACQUISTION TDS754A ONLY CKT BD ASSY ACQUISTION TDS782A ONLY IRCUIT BD ASSY ACQUISITION TDS784A ONLY A10 EXCHANGE ITEM FLEX CIRCUIT TEK PROBE INTERFACE CLAMP CABLE 0 062 DIA PLASTIC BRACKET CKT BD PLASTIC BRACKET CKT BD PLASTIC CHASSIS SCOPE TOP MARKER IDENT REAR PANEL CONNECTORS OPTIONS GASKET RF SHIELDING Mfr Code 0 01 2469 80009 0 9P9 07416 24931 80009 TK1163 0 9P9 00779 30817 0 01 80009 80009 80
73. 4B Four P6243 probes TDS 620B Two P6243 probes TDS 540B Four P6139A 10X 500 MHz Passive probes TDS 520B Two P 6139A 10X 500 MHz Passive probes TDS 680B TDS 684B TDS 782A TDS 784A No probes standard Part Number P6139A P6139A P6243 P6243 P6139A P6139A Front Cover Accessory Pouch TDS 644B TDS 684B TDS 700A U S Power Cord 200 3696 01 016 1268 00 161 0230 01 You can also order the optional accessories listed in Table 7 3 Table 7 3 Optional Accessories Accessory Part Number Service Manual 070 9721 XX Plotter GPIB and Centronics Standard HC100 Oscilloscope Cart K420 Rack Mount Kit for field conversion 016 1236 00 Accessory Pouch TDS 500B TDS 620B TDS 680B 016 1268 00 Soft Sided Carrying Case 016 0909 01 Transit Case 016 1135 00 GPIB Cable 1 meter 012 0991 01 GPIB Cable 2 meter 012 0991 00 Centronics Cable 012 1214 00 RS 232 Cable 012 1298 00 The following optional accessory probes are recommended for use with your oscilloscope m P6245 Active high speed digital voltage probe FET DC to 1 5 GHz 50 Q input TDS 500B TDS 600B and TDS 700A Service Manual 7 5 Options and Accessories 7 6 P6243 Active high speed digital voltage probe FET DC to 1 0 GHz 50 Q input P6101B 15 MHz Passive probe P6156 10X 3 5 GHz Passive low capacitance low impedance Zo probe Provides 100X when ordered with Option 25 P6139A 10X 500 MHz Passive probe
74. 5 mV 0 1 div x V div 0 25 x Net Off set 15 mV 0 1 div x V div 0 25 x Net Off set 150 mV 0 6 div x V div 0 1 div x V div Bandwidth Bandwidth 10 mV div 1 V div DC 500 MHz DC 1GHz 5 mV div 9 95 mV div DC 450 MHz DC 750 MHz 2 mV div 4 98 mV div DC 300 MHz DC 600 MHz 1 mV div 1 99 mV div DC 250 MHz DC 500 MHz TDS 520B 540B 724A amp 754A TDS 782A amp 784A Volts Div Bandwidth2 Bandwidth 10 mV div 1 V div DC 500 MHz DC 1GHz 5 mV div 9 95 mV div DC 500 MHz DC 750 MHz 2 mV div 4 98 mV div DC 500 MHz DC 600 MHz 1 mV div 1 99 mV div DC 450 MHz DC 500 MHz Crosstalk Channel Isolation gt 100 1 at 100 MHz and 230 1 at the rated bandwidth for the channel s Volt Div setting for any two channels having equal Volts Div settings 1 16 TDS 500B TDS 600B and TDS 700A Service Manual Warranted Characteristics Table 1 10 Warranted Characteristics Signal Acquisition System Cont Description Delay Between Channels Full TDS 600B 100 ps for any two channels with equal Volts Div and Coupling settings and Bandwidth both channels deskew values setto 0 TDS 500B 700A lt 50 ps for any two channels with equal Volts Div and Coupling settings Input Impedance DC 1 MQ Coupled 1 0 5 in parallel with 10 pF 3 pF Input Impedance DC 50 Coupled 50 Q 1 with VSWR x1 3 1 from DC 500 MHz x1 5 1 f
75. 500B TDS 600B and TDS 700A Service Manual Performance Tests Press the front panel button that corresponds to the channel you are to confirm m Move the leveling output of the sine wave generator to the channel you selected b Match the trigger source to the channel selected m Press TRIGGER MENU Press the main menu button Source then press the side menu button that corresponds to the channel selected C Set its input impedance m Press VERTICAL MENU then press the main menu button Coupling W Press the side menu Q button to toggle it to the 50 Q setting d Set the vertical scale Set the vertical SCALE to one of the settings listed in Table 4 4 not yet checked Start with the 100 mV setting Table 4 4 Analog Bandwidth Test Frequency TDS 680B TDS 520B TDS 684B TDS 540B Horizontal TDS 782A TDS 620B TDS 724A Vertical Scale Reference Amplitude Scale TDS 784A TDS 644B TDS 754A Limits 100 mV 600 mV 6 divisions lns 1 GHz 500 MHz 500 MHz 2424 mV 1V 5 V 5 divisions 1GHz 500 MHz 23 535 V 1 gt 424 e Display the test signal Do the following subparts to first display the reference signal and then the test signal m Press MEASURE then press the main menu button Select Measrmnt for CHx TDS 500B TDS 600B and TDS 700A Service Manual 4 35 Performance Tests 4 36 W Press the side menu button more if needed until the menu label Frequency appears in the s
76. 500B TDS 600B and TDS 700A Service Manual Performance Tests 2 ms division and faster TRIG D will remain constantly lighted It will flash for slower settings m Press TRIGGER MENU then press the main menu button Slope m Press SET LEVEL TO 50 Adjust the TRIGGER LEVEL knob so that the TRIG D light is on Set the level to near the middle of the range where the TRIG D light is on CHECK that the trigger is stable for the test waveform on both the positive and negative slopes Use the side menu to switch between trigger slopes W Enter pass fail result for main trigger on the test record m Leave the Main trigger system triggered on the positive slope of the waveform before continuing to the next step Tek Run 2 50 05 5 Average Edge Slope Ampl 36mVv Check if stable trigger HAE ioomvc M 0ns Chi f giv Source Coupling Level ode Type amp Edge chi US T Holdoff CO Figure 4 19 Measurement of Trigger Sensitivity 50 MHz Results Shown on a TDS 684B Screen c Check Delayed trigger system for stable triggering at limits Do the following subparts in the order listed m Press HORIZONTAL MENU then press the main menu button Time Base Press the side menu button Delayed Only then press Delayed Triggerable in the same menu TDS 500B TDS 600B and TDS 700A Service
77. 600B and TDS 700A Service Manual 6 25 Removal and Installation Procedures 6 26 Cabinet Modules Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its front is facing you Remove the display frame assembly a Do procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 to remove the front cover and trim ring b Liftthe front panel assembly out of the front subpanel until you can reach J2 on the front panel assembly Disconnect the flex cable coming from the display frame assembly at J39 of the front panel assembly c Do the procedure Floppy Disk page 6 42 to remove the floppy disk drive d Remove the three screws securing the display frame assembly to the front subpanel and remove that assembly Reinstallation a Do in reverse order substeps 3b 3d reversing each step to reinstall the display frame assembly Then see the procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 to complete reassemb ly of the oscilloscope Assemble equipment and locate modules to be removed Have handy a pair of needle nose pliers Item 6 Locate the modules to be removed in the locator diagram External Modules see Figure 6 1 Orient the oscilloscope Set the oscilloscope so the left side is down on the work surface and its handle is facing upwards Remove the handle a Insert the tips of a pair of needle nose pliers Item 6
78. 600B and TDS 700A Service Manual iii Table of Contents Figure 4 29 Triggered Signal Range Test 300 mV 4 72 Figure 4 30 Triggered Signal Range Test 75 mV 4 73 Figure 4 31 60 Hz Rejection Test 4 74 Figure 4 32 60 Hz Rejection Test Setup Signal 4 74 Figure 4 33 Subsequent 60 Hz Rejection Test Hookup 4 75 Figure 4 34 60 Hz Rejection Test Result TDS 684B Shown 4 76 Figure 4 35 Line Count Accuracy Test Hookup 4 77 Figure 4 36 Line Count Accuracy Test Setup Waveform TDS 684B ShOW 255 GERA NEWER NES AR NU 4 78 Figure 4 37 Line Count Accuracy Correct Result Waveform 4 79 Figure 4 38 Setup for Sync Duty Cycle Test 4 81 Figure 4 39 Sync Duty Cycle Test One Div Neg Pulse Waveform 4 82 Figure 4 40 Sync Duty Cycle Test Critically Adjusted Pulse 4 83 Figure 4 41 Sine Wave Generator Leveling Equipment Setup 4 85 Figure 4 42 Equipment Setup for Maximum Amplitude 4 86 Figure 5 1 Accessing the Protection Switch 5 9 Figure 5 2 Hookup for Probe Compensation 5 10 Figure 5 3 Performing Probe Compensation 5 11 Figure 5 4 Proper and Improper Probe Compensation 5 12 Figure 5 5 Exposing the Inner Probe Tip 5 13 Figure 5 6 Initial Test Hookup
79. 700A Service Manual 1 21 Warranted Characteristics 1 22 TDS 500B TDS 600B and TDS 700A Service Manual Typical Characteristics This subsection contains tables that list the various typical characteristics which describe the TDS 500B TDS 600B and TDS 700A oscilloscopes Typical characteristics are described in terms of typical or average performance Typical characteristics are not warranted Table 1 16 Typical Characteristics Signal Acquisition System Name Analog Bandwidth DC 50 Coupled Description Volts Div as Read Out on Screen 520B 540B 724A amp 754A Bandwidth with P6243 or P6245 Probe and Bandwidth selection is FULL TDS 520B 540B 724A amp 754A 10 V div 100 V div 100 mV div 10 V div 50 mV div 99 5 mV div 20 mV div 49 8 mV div Not Applicable DC 500 MHz DC 500 MHz DC 500 MHz 10 mV div 19 9 mV div DC 450 MHz P6243 DC 500 MHz P 6245 Analog Bandwidth DC 50 Coupled Volts Div as Read Out on Screen TDS 782A amp 784A ei 10 Vidiv 100 V div Not Applicable TDS 782A amp 784A 100 mV div 10 V div DC 1GHz 50 mV div 99 5 mV div DC 750 MHz 20 mV div 49 8 mV div DC 600 MHz 10 mV div 19 9 mV div DC 500 MHz Analog Bandwidth DC 1M Coupled with P6139A Probe and Bandwidth selection is FULL TDS 520B 540B 724A 754A 782A amp 784A Analog Bandwidth DC 50 Coupled with P6243 Probe TDS 620B amp 644B or P6245 Probe
80. 88 E 8 cd ac RB B 378 B Ba RS E ed Pin 5 B puma E E ote EXE 8 5 5 roue a 8 U1097 2 126 iu i E E E IH DRIED d B 8 T 2 Loar u m EE RE E B c3 E EX EE E a oe a sg zi H ed les B E BE F _ cd D a E a E E TIU E EX 8 BB B e E E dum no E 8 oF cee 0000000000000000000000000 0000000000000000000000000 0000000000000000000000000 09000000000000000000000000 V M 51002 Figure 6 36 A11 DRAM Processor Display Module View of Right Side 6 70 TDS 500B TDS 600B and TDS 700A Service Manual Troubleshooting 006000 1 E Y 0000000000 0000000000 0000000000 Figure 6 37 A11 DRAM Processor Display Module View of Upper Left Corner 0000000000000 o Y Y nnnnnrn 0000000 0000000 0000000 OQ OO OQ OQ 0000000 NN NN 11 D 000000000000000010 Figure 6 38 A11 DRAM Processor Display Module View of Lower Left Corner
81. 931 SPECIALTY CONNECTOR CO INC 30817 INSTRUMENT SPECIALTIES CO INC Address 72 VERONICA AVE UNIT 4 UNIT A K 5 F GOLD KING IND BLDG NO 35 41 TAI LIN ROAD 9265 SW 5TH 1775 NW 216TH 9898 SW TIGARD ST 1800 NW 216TH AVE 24350 STATE ROAD 23 SOUTH 1800 NW 169TH PL SUITE B 300 ED SNYDER BLDG 38 302 15 F 1 FU SHING N ROAD 3000 LEWIS amp CLARK WAY SUITE 2 6370 NANCY RIDGE DR SUITE 109 315 SOUTH MONTGOMERY PO BOX 2231 14181 SW MILLIKAN WAY 1521 POPLAR LANE 3000 LEWIS AND CLARK HWY PO BOX 737 403 NORTH MAIN 810 SE SHERMAN 5750 NE MOORE COURT 2800 FULLING MILL PO BOX 3608 3191 CASITAS 7 INDUSTRIAL WAY 7575 MARKET PLACE DR 11866 SLATER AVE NE 2789 NORTHPOINT PARKWAY 2200 US HIGHWAY 27 SOUTH PO BOX 1980 857 OLD TRAIL RD 2100 EARLYWOOD DR PO BOX 547 EXIT 53 RT 80 BOXA TDS 500B TDS 600B and TDS 700A Service Manual City State Zip Code SUMMERSET 08873 KWAI CHUNG N T HONG KONG WILSONVILLE OR 97070 HILLSBORO OR 97123 TIGARD OR 97223 HILLSBORO OR 97124 6629 SOUTH BEND IN 46614 9696 BEAVERTON OR 97006 BEAVERTON OR 97077 TAIPEI TAIWAN ROC VANCOUVER WA 98601 SAN DIEGO CA 92121 SHERMAN TX 75091 2231 BEAVERTON OR 97077 FOREST GROVE OR 97116 VANCOUVER WA 98661 2999 NEWBERG OR 97132 PORTLAND OR 97214 HILLSBORO OR 97124 6474 HARRISBURG PA 17105 LOS ANGELES CA 90039 2410 SALEM NH 03079 EDEN PRAIRIE MN 55344 3637 KIRKLAND WA 98034 SANTA ROSA C
82. A 95407 RICHMOND IN 47375 0010 ETTERS PA 17319 FRANKLIN IN 46131 DELAWARE WATER GAP PA 18327 10 3 Mechanical Parts List Manufacturers Cross Index Cont Mfr Code 34416 5Y400 50356 53387 6D224 61857 61935 15915 80009 10 4 Manufacturer PARSONS MFG CORP TRIAX METAL PRODUCTS INC DIV OF BEAVERTON PARTS MFG CO TEAC AMERICA INC 3M COMPANY ELECTRONIC PRODUCTS DIV HARBOR ELECTRONICS COMPANY SAN 0 INDUSTRIAL CORP SCHURTER INC LITTELFUSE TRACOR INC SUB OF TRACOR INC TEKTRONIX INC Address 1055 OBRIAN DR 1800 NW 216TH AVE 7133 TELEGRAPH RD PO BOX 750 3M AUSTIN CENTER 14500 5 BROADWAY 91 3 COLIN DRIVE 1016 CLEGG COURT 800 E NORTHWEST HWY 14150 SW KARL BRAUN DR PO BOX 500 TDS 500B TDS 600B and TDS 700A Service Manual City State Zip Code MENLO PARK CA 94025 1408 HILLSBORO OR 97124 6629 MONTEBELLO CA 90640 6537 AUSTIN TX 78769 2963 GARDENA CA 90248 HOLBROOK NY 11741 PETALUMA CA 94952 1152 DES PLAINES IL 60016 3049 BEAVERTON OR 97077 0001 Mechanical Parts List Replaceable Parts List Fig amp Index Num ber 1 1 16 17 Tektronix Serial No Serial No Part Number Effective Discontd Qty 200 3695 02 1 161 0230 01 1 343 1213 00 1 200 2264 00 1 200 2265 00 1 159 0013 00 1 159 0210 00 1 650 3039 00 1 367 0247 01 1 200 2191 00 2 437 0399 01 1 348 1110 02 4 348 1254 01 4 348 0875 00 1 348 1109 01 2 200 3696 01 1
83. A Reference Tektronix part number 070 9382 XX contains a brief overview of oscilloscope operation TDS Family 400A 500B 600B and 700A Programmer Manual Tektronix part number 070 9556 X X contains information for programmed operation via the GPIB interface Included are the complete command set setup information and programming examples TDS 500B TDS 600B amp TDS 700A Technical Reference Tektronix part number 070 9729 contains performance verification procedures and specifications TDS 500B TDS 600B and TDS 700A Service Manual xvii Preface xviii TDS 500B TDS 600B and TDS 700A Service Manual Introduction Service Strategy Service Offerings Warranty Repair Service Repair or Calibration Service STOP Throughout this manual any field replaceable component assembly or part of this oscilloscope is referred to generically as a module This manual contains all the information needed for periodic maintenance of the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes Examples of such information are procedures for checking performance and for readjustment Further it contains all information for corrective maintenance down to the module level This means that the procedures diagrams and other troubleshoot ing aids help isolate failures to a specific module rather than to components of that module Once a failure is isolated replace the module with a fresh unit obtained from the factory A
84. At Depot Service Tektronix offers several standard priced adjustment calibra tion and repair services W A single repair and or adjustment m Calibrations using equipment and procedures that meet the traceability standards specific to the local area Annual maintenance agreements that provide for either calibration and repair or calibration only of the oscilloscope Of these services the annual maintenance agreement offers a particularly cost effective approach to service for many owners of the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes Such agreements be purchased to span several years On Site Service The annual maintenance agreement can be purchased with on site service with repair and calibration done at your facility This service reduces the time your oscilloscope is out of service when calibration or repair is required Tektronix supports repair to the module level by providing Module Exchange and Module Repair and Return Module Exchange This service reduces down time for repair by allowing you to exchange most modules for remanufactured ones Tektronix ships you an updated and tested exchange module from the Beaverton Oregon service center typically within 24 hours Each module comes with a 90 day service warranty Module Repair and Return This service returns to you within 10 days the same module that you shipped to Tektronix The module shipped is repaired tested and returned to you from t
85. B TDS 600B and TDS 700A Service Manual 7 3 Options and Accessories Table 7 1 Options Cont Option Label 2F FFT INTG DIFF Advanced DSP math 3l and 3P Color printer Description Add advanced DSP math features such as FFT integration and differentiation Option applies only to TDS 520B TDS 540B TDS 620B and TDS 680B models Tektronix P haser 140 360 dpi inkjet color printer Order option 31 for 220V use or option 3P for 110 V use 4D L1 L3 L5 L9 Standard Accessories 7 4 Four probes Manuals in French Manuals in German Manuals in J apanese Manuals in Korean Delete the four standard probes shipped with the model Option applies only to TDS 540B TDS 644B and TDS 754A models Provides Language versions of User and Reference Manuals according to option number chosen The oscilloscope comes standard with the accessories listed in Table 7 2 Table 7 2 Standard Accessories Accessory Part Number User Manual 070 9719 XX Programmer Manual 070 9556 XX Reference 070 9382 XX Technical Reference Performance Verification and Specifications 070 9720 XX TDS 500B TDS 600B and TDS 700A Service Manual Options and Accessories Optional Accessories Accessory Probes Table 7 2 Standard Accessories Cont Accessory Probes TDS 754A Four P6139A 10X 500 MHz Passive probes TDS 724A Two P 6139A 10X 500 MHz Passive probes TDS 64
86. CS CLK J560 1570 00 Figure 9 2 Block Diagram Cont TDS 500B TDS 600B and TDS 700A Service Manual 9 5 Diagrams 9 6 TDS 500B TDS 600B and TDS 700A Service Manual E 1 Mechanical Parts List This section contains a list of the replaceable modules for the oscilloscope Use this list to identify and order replacement parts Parts Ordering Information Module Servicing Replacement parts are available through your local Tektronix field office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements Therefore when ordering parts it is important to include the following information in your order m Part number m Instrument type or model number Instrument serial number Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Modules can be serviced by selecting one of the following three options Contact your local Tektronix service center or representative for repair assistance Module Exchange In some cases you may exchange your module for a reman ufactured module These modules cost significantly les
87. Compensate the Probe Measure the Probe Bandwidth and Adjust the Probe High Frequency Response If probe bandwidth is within required limits you will be instructed to not do the high frequency response adjustment Compensate the Probe Equipment Re One P6139A probe Item 16 quired 1 Install the test hookup and preset the oscilloscope controls a Hook up test signal source Install the optional accessory probe to CH 1 Connect the probe tip to PROBE COMPENSATION SIGNAL on the front panel connect the probe ground to PROBE COMPENSATION GND See Figure 5 2 co Ff 3 q 20595200 D E a a am a 0 cc j L 0 c5 0 A 5 gt Figure 5 2 Hookup for Probe Compensation b Initialize the oscilloscope W Press save recall SETUP TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init c Modify the initialized front panel control settings Press AUTOSET Set the horizontal SCALE to 250 us m Press SET LEVEL 50 as required to trigger the signal m Press SHIFT then press ACQUIRE MENU Press the main menu button Mode Then pre
88. DER BY DESC 131 0890 01 2 CONN HARDWARE DSUB ACK SCREW 00779 205818 2 4 346 0266 00 1 STRAP CABLE PLASTIC 0KB05 346 0266 00 5 174 3053 00 1 CA ASSY SP ELEC 50 28 AWG 5 85 L F LAT 53387 174 3053 00 6 174 3052 00 2 CA ASSY SP ELEC 50 28 AWG 5 85 L F LAT 53387 174 3052 00 7 174 1728 00 1 ASSY SP RIBBON IDC 26 28 AWG 6 0 L 53387 ORDER BY DESC OPTION 05 CABLES 174 0655 00 1 CABLE ASSY COAX RFP 50 OHM 9 2 22 4 L 80009 174 0655 00 174 3089 00 1 CA ASSY OPTICAL RIBBON IDC 40 28 AWG 4 875 L 80009 174 3089 00 174 3090 00 1 CA ASSY OPTICAL RIBBON IDC 50 28 AWG 4 851 80009 174 3090 00 10 14 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Figure 10 5 Cables Top View 10 15 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Replaceable Parts List Fig amp Index Num Tektronix Serial No Serial No Mfr Mfr Part Num ber Part Number Effective Discontd Qty amp Description Code ber 10 6 1 407 4460 1 SHIELD FDD NOISE SHIELD DISK DRIVE TOP 80009 407 4460 2 211 0840 xx 2 SCREW MACHINE M2 6 X 0 45MM PITCH X 4 0L 0 01 26 4 OPTION 1F ON TDS 520B 540B 620B amp 680B 3 211 0730 00 2 SCR ASSEM WSHR 6 32 X 0 375 PNH STL 0 01 ORDER BY DESC OPTION 1F ON TDS 520B 540B 620B amp 680B 4 174 2964 00 1 WIRE ELECTRICAL FLAT FLEX UMPER 1DM20 1 00MM 26 7 B OPT
89. DS 700A Service Manual 4 13 Brief Procedures e Save the settings Press SETUP Press the main menu button Save Current Setup then press the side menu button To File m Turn the general purpose knob to select the file to save Choose starting with TEK then containing 5 numbers and a SET extension For example the first time you run this on a blank formatted disk or on the Example Programs Disk the oscilloscope will assign the name TEK00000 SET to your file If you ran the procedure again the oscilloscope would increment the name and call the file TEK00001 SET W Press the side menu button Save To Selected File 2 Verify the file system works Press the main menu button Recall Factory Setup and the side menu button OK Confirm Factory Init to restore the 500 us time base and the five cycle waveform Press the main menu button Recall Saved Setup then press the side menu button From File Turn the general purpose knob to select the file to recall For example if you followed the instructions above and used a blank disk you had the oscilloscope assign the name 00000 5 to your file Press the side menu button Recall From Selected File Verify that Digitizing Oscilloscope retrieved the saved setup from the disk Do this by noticing the horizontal SCALE for the M main time base is again 200 us and the waveform shows only two cycles just as it was when you saved the setup 3 Remove the test hoo
90. Did the Processor pass but something Replace the A11 DRAM Processor Display module the Front Panel and or FP Proc Interface tests fail Did the Of the two the Front Panel Interface test must have failed Replace the A12 Front Panel module ail Yes Perform the Processor F ront Panel troubleshooting procedure The oscilloscope should be ok Run Are there the extended diagnostics the Did The Acquisition tests any failures with the discussion of the Diagnostics on the Attn Acq must have been the only Acquisition andor its page 6 57 explains how to do this Interface failure Replace the A10 interfaces and verify that all the modules pass fail Acquisition module Perform the Attenuator Acquisition troubleshooting procedure Regardless Perform the of other failures did Processor Acquisition the Interface troubleshooting test fail procedure Figure 6 27 Module Isolation Troubleshooting Procedure TDS 500B TDS 600B and TDS 700A Service Manual 6 61 Troubleshooting Use this procedure to determine if an oscilloscope problem is caused by the Low Voltage Power Supply Connect the oscilloscope to the correct power source Turn on the principal power switch Does the oscilloscope but sometime later it powers off on its own power on all the diagnostics pass The oscillo
91. Figure 4 10 Initial Test Hookup 4 39 Figure 4 11 Measurement of Channel Delay TDS 684B Shown 4 41 Figure 4 12 Initial Test Hookup 4 43 Figure 4 13 Measurement of Accuracy Long Term and Debary Rer ERES 4 45 Figure 4 14 Initial Test Hookup 4 46 Figure 4 15 Measurement of Time Accuracy for Pulse and Glitch Triggering 4 48 Figure 4 16 Initial Test Hookup 4 49 Figure 4 17 Measurement of Trigger Level Accuracy 4 51 Figure 4 18 Initial Test Hookup 4 54 Figure 4 19 Measurement of Trigger Sensitivity 50 MHz Results Shown on a TDS 684B Screen 4 55 Figure 4 20 Initial Test Hookup 4 58 Figure 4 21 Measurement of Main Trigger Limits 4 60 Figure 4 22 Initial Test Hookup 4 62 Figure 4 23 Measurement of Probe Compensator Frequency 4 64 Figure 4 24 Subsequent Test Hookup 4 65 Figure 4 25 Measurement of Probe Compensator Amplitude 4 66 Figure 4 26 Jitter Test Hookup 4 68 Figure 4 27 Jitter Test Displayed Waveform TDS 684B Shown 4 69 Figure 4 28 Jitter Test When Completed TDS 684B Shown 4 70 TDS 500B TDS
92. H3 and to CH4 use AXI and AX2 instead of CH3 and CH4 if your TDS model is so equipped Write down these three numbers in the first measurement column of Table 4 5 Note that these numbers may be either positive or negative TDS 500B TDS 600B and TDS 700A Service Manual 4 41 Performance Tests p Repeat the procedure from step 1 c through 2 e Again use the cursors to measure the skew from to CH2 CHI to CH3 and CHI to CH4 Write down these numbers in the second measurement column of Table 4 5 Note that these numbers may be either positive or negative Add the first CH1 to CH2 skew measurement to the second CH1 to CH2 skew measurement and divide the result by 2 Use Table 4 5 Add the first to CH3 AX1 on some TDS models skew measure ment to the second CH1 to CH3 skew measurement and divide the result by 2 Use Table 4 5 Add the first to CHA AX2 on some TDS models skew measure ment to the second CH1 to skew measurement and divide the result by 2 Use Table 4 5 Check against limits CHECK that the largest of the three results from steps 1 m and n is between 100 ps and 100 ps for the TDS 600B or between 50 ps and 50 ps for the TDS 500 700 Enter time on the test record Table 4 5 Delay Between Channels Worksheet Add First and First Second Second Divide Sum Coupling Measurement Measurement Measurements by 2 CH1 to CH2 skew CH1 to CH3 s
93. HIFT then press UTILITY m Repeatedly press the main menu button System until Diag Err is highlighted in the pop up menu m Repeatedly press the main menu button Area until Display is highlighted in the pop up menu m Repeatedly press the side menu button more until Composite appears in the side menu Push Composite Press the main menu button EXECUTE then press the side menu button Ok Confirm Run Test b Adjust R401 TRACE ROTATION to minimize the display s tilt Use the frame around the display as a reference 401 is the second adjustment from the fan 3 Adjust the display brightness Wm Locate R403 BRIGHTNESS It is one of the adjustments on the left side of the instrument located just ahead of the fan It is the fourth adjustment from the fan W Observe the luminance patches using a 6X magnifier m Adjust 403 BRIGHTNESS until the background raster lines in the 5 luminance patch see Figure 5 11 just disappear while the lines in the 10 luminance patch are just visible when both are viewed through the magnifier 4 Adjust the display contrast a Display the White Field test pattern Press the center main menu button to display the main menu W Press the main menu button Tests m Repeatedly press the side menu button until White Field appears in the side menu Push White Field Press the main menu button EXECUTE then press the side menu button Ok Confirm Run Test TDS 500B TD
94. ION 1F ON TDS 520B 540B 620B amp 680B 5 276 0849 xx 1 CORE EM EMI SUPPRESS RBN CA 1J96 BFS 33 5X 8X OPTION 1F ON TDS 520B 540B 620B amp 680B 6 407 4230 xx 1 BRKT DISK DRIVE ALUMINUM 0J9P9 4074230 OPTION 1F ON TDS 520B 540B 620B amp 680B 7 337 3935 1 SHLD DISK DRIVE 0 05 3373935 OPTION 1F ON TDS 5208 540B 6208 amp 6806 8 119 5677 01 1 DISK DRIVE FLOPPY 3 5 INCH 1 44MB 0 5 INH 0500 50356 FD 04HF 2300 OPTION 1F ON TD 520B 540B 620B amp 680B 9 105 1081 xx 1 ADAPTER FLOPPY DISK DRIVE BRACKET SPACER TK1163 105 1081 211 0866 xx 1 SCREW PHIL M2 5X10 PHIL PNH BRZN 0 01 211 0866 Not 200 4095 00 1 COV DISK DRIVE COSMETIC TK1163 ORDER BY DE shown TDS 520B 540B 620B amp 6808 WITHOUT OPTION 1F SCRIPTION Not 337 3956 00 1 SHIELD DISK DRIVE HOLE 0 005 STAINLESS STEEL 80009 337 3956 00 shown TDS 520B 540B 620B amp 680B WITHOUT OPTION 1F 10 16 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List 9 xe Ly e LV V NM 2 fca Jt ff NER ya C fl 4 MIN _ Ww ENG Figure 10 6 Floppy Disk 10 17 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Replaceable Parts List Fig amp Index Num Tektronix Serial No Serial No Mfr Mfr Part Num ber Part Number Effective Discontd Qty Name amp Description Code ber STANDARD ACCESSORIES 7 1 161 0104
95. LE knob counterclockwise decreases the amplitude of the waveform on screen turning the knob clockwise increases the amplitude and returning the knob to 200 mV returns the amplitude to about 2 5 divisions e Verify that the channel acquires in all acquisition modes Press SHIFT then press ACQUIRE MENU Use the side menu to select in turn each of the three hardware acquire modes and confirm that the following statements are true Refer to the icons at the left of each statement as you confirm those statements TDS 500B TDS 600B and TDS 700A Service Manual 4 9 Brief Procedures m Sample mode displays an actively acquiring waveform on screen Note that there is noise present on the peaks of the square wave lb Peak Detect mode displays an actively acquiring waveform on screen with the noise present in Sample mode peak detected m Hi Res mode TDS 500B and 700A only displays an actively acquiring waveform on screen with the noise that was present in Sample mode reduced a dh m Envelope mode displays an actively acquiring waveform on screen with the noise displayed W Average mode displays an actively acquiring waveform on screen with the noise reduced f Testall channels Repeat substeps a through e until all four input channels are verified 3 Remove the test hookup Disconnect the probe from the channel input and the probe compensation terminals Verify the Time Base Equipment Re One pro
96. Manual 4 55 Performance Tests 4 56 m Press SHIFT then press DELAYED TRIG Press the main menu button Level Press the side menu button SET TO 50 CHECK that a stable trigger is obtained for the test waveform for both the positive and negative slopes of the waveform Use the TRIGGER LEVEL knob to stabilize the Main trigger Use the general purpose knob to stabilize the Delayed trigger Press the main menu button Slope then use the side menu to switch between trigger slopes See Figure 4 19 W Enter pass fail result for delayed trigger on the test record m Leave the Delayed trigger system triggered on the positive slope of the waveform before continuing to the next step Also return to the main time base Press HORIZONTAL then press the main menu button Time Base Press the side menu button Main Only Press CLEAR MENU 3 Confirm the AUX Trigger input a Display the test signal m Remove 10X attenuator and reconnect the cable to CH 1 m Set the test signal amplitude for about 2 5 divisions on screen m Now fine adjust the generator output until the CH 1 Amplitude readout indicates the amplitude is 250 mV Readout may fluctuate around 250 mV Check the AUX trigger source for stable triggering at limits Do the following in the order listed W Use the definition for stable trigger from step 2 m Press TRIGGER MENU then press the main menu button Source Press the side menu button
97. O 1000 G9 7 77 11001 G 77 15 Pins J1002 NC 4 77 Attenuator 1003 NC A18 Main Converter Control Board A19 Power Factor Control Board P6 12 Main LV Power Supply Board Figure 9 1 Interconnections 9 2 77 100 100 1500 Ot r D Analog J5 2 10 40 Qa Digital CH Power m s Video 2 Trigger Board Option 05 J4 TDS 500B TDS 600B and TDS 700A Service Manual Diagrams E 0 1 3 2 cL f INPUT e 77 MAIN RIGGER OUTPUT SE 3 29 11 Dram xl Processor 26 ERA rds Display 5 oe 15 15 PIN VGA ANALOG OUTPUT 20 Cartridge Console A23 Serpar Service Port Board 20 p1 CENTRONIICS COMPATIBLE A30 Displa Board CRT Anode 100 NC jn Vert Yoke 16 399 A32 Video 150 B Board J 285 J501 Floppy 2 J60 500 1 6 Driver J 400 e A V1000 J70 E 500 2 280 m 500 3 Analog Power 150 500 4 300 500 5 Digital P ower 190 555 100 350 2 Horiz Yoke nn ae A31 Shutter i Driver udi 152 1505 Board 85 J560 570 12 Figure 9
98. P6217 Active high speed digital voltage probe FET DC to 4 GHz DC offset 50 input Use with 1103 TekProbe Power Supply for offset control P6204 Active high speed digital voltage probe FET DC to 1 GHz DC offset 50 Q input Use with 1103 TekProbe Power Supply for offset control 6563 5 Passive SMD probe 20X 500 MHz P5100 High Voltage Passive probe 2 5 kV DC to 250 MHz P5205 High Voltage differential probe 1 kV DC to 100 MHz AM 5035 DC AC Current probe system AC DC Uses 6302 Current Probe AM 5035 Option 03 DC AC Current probe system AC DC Uses A6303 Current Probe TCP 202 Current Probe DC to 100 Mhz P6021 AC Current probe 120 Hz to 60 MHz P6022 AC Current probe 935 kHz to 120 MHz CT 1 Current probe designed for permanent or semi permanent in circuit installation 25 kHz to 1 GHz 50 input CT 2 Current probe designed for permanent or semi permanent in circuit installation 1 2 kHz to 200 MHz 50 Q input 4 Current Transformer for use with the AM 5035 6302 and P6021 Peak pulse 1 kA 0 5 Hz to 20 MHz with AM 5035 A6302 P6701A Opto Electronic Converter 500 to 950 nm DC to 850 MHz V mW P6703A Opto Electronic Converter 1100 to 1700 nm DC to 1 GHz 1 V mW P6711 Opto Electronic Converter 500 to 950 nm DC to 250 MHz 5 V mW P6713 Opto Electronic Converter 1100 to 1700 nm DC to 300 MHz 5 V mW TDS 500B TDS 600B and TDS 700A Service Manual Options and Accessorie
99. PUT 50 Probe Compensator Output Signal Frequency CH1 Freq Voltage difference Certificate Number RH Technician Minimum Incoming Outgoing Maximum 1 050 2 4 22 TDS 500 TDS 600B and TDS 700A Service Manual Performance Tests TDS 500B 700A Test Record Photocopy this and the next three pages and use them to record the performance test results for your TDS 500 700 TDS 500B 700A Test Record Instrument Serial Number Certificate Number Temperature RH Date of Calibration Technician TDS 500B 700A Performance Test Minimum Incoming Outgoing Maximum Offset Accuracy CH1 Offset 1 mV 1 6 mV 101 mV 25 1 1 01 V 251 mV CH2 Offset 1 mV 1 6 mV 101 mV 25 1 mV 1 01 V 251 mV CH3 or AX1 Offset 1 mV 1 6 mV 101 mV 25 1 mV 1 01 V 251 mV CH4 or AX2 Offset 1 mV 1 6 mV 101 mV 25 1 1 01 V 251 mV DC Voltage Measurement Accuracy Averaged CH1 5 mV Vert scale setting 1 0355 V 1 0445 V 5 Div position setting 1 V offset CH1 5 mV Vert scale setting 1 0445 V 1 0355 V 5 Div position setting 1 V offset CH1 200 mV Vert scale setting 11 5195 V 11 6805 V 5 Div position setting 10 V offset CH1 200 mV Vert scale setting 11 6805 V 11 5195 V 5 Div position setting 10 V offset CH1 1 V Vert scale setting 17 75 15 V 18 24
100. Pulse Generator Digitizing Oscilloscope O O Output E3 AC 500 Terminator 50 Cable Figure 4 38 Setup for Sync Duty Cycle Test m Turn the pulse generator OUTPUT VOLTS control until the signal on the oscilloscope shows a one division negative going pulse See Figure 4 39 NOTE You may need to adjust the trigger level control to obtain a stable trigger TDS 500B TDS 600B and TDS 700A Service Manual 4 81 Performance Tests 4 82 Tek Run 250MS s Sample Select Measurement C1 width 404 0ns Low signal amplitude Period cs 2 No period 1 Frequency found Positi width width lE iszuvow Ew ign CREE Ue Tae more H ir ii Testez MES iu Remove Gating Reference Measrmnt Setup Snapshot NEU EEE Measrmnt OFF Histogram Levels Gpe Figure 4 39 Sync Duty Cycle Test One Div Neg Pulse Waveform m Turn the pulse generator PULSE DURATION variable control to adjust the negative pulse so the oscilloscope s CH1 Width measurement displays 400ns 10 ns m Turn the HORIZONTAL SCALE knob to set the oscilloscope time base to 5ps div m Turn the pulse generator PERIOD variable control to adjust the period until the oscilloscope CH1 Period measurement reads 21 000us 25 50 ns See Figur
101. Rp REIR RR ROS 6 15 Procedures for External 6 16 Procedures for Outer Chassis Modules 6 29 Procedures for Inner Chassis Modules 6 46 Disassembly for Cleaning 6 53 Troubleshooting 6 57 Diagnostics ree pepe ue PEE Cep TES 6 57 Firmware Updates gocce Res don eR EN 6 58 Options Electrical Parts List Diagrams Mechanical Parts Llst il TDS 500B TDS 600B and TDS 700A Service Manual Table of Contents List of Figures Figure 2 1 Map of Display Functions 2 8 Figure 4 1 Map of Display Functions 4 3 Figure 4 2 Verifying Adjustments and Signal Path Compensation 4 6 Figure 4 3 Universal Test Hookup for Functional Tests TDS 600B 8 4 8 Figure 4 4 Measurement of DC Offset Accuracy at Zero Setting 4 29 Figure 4 5 Initial Test Hookup 4 30 Figure 4 6 Measurement of DC Accuracy at Maximum Offset Position 2 zy ex RUP NOR RR UR eA AIRES 4 32 Figure 4 7 Initial Test Hookup 4 34 Figure 4 8 Optional Initial Test Hookup 4 34 Figure 4 9 Measurement of Analog Bandwidth 4 37
102. S 600B and TDS 700A Service Manual 1 13 Nominal Traits 1 14 TDS 500B TDS 600B and TDS 700A Service Manual Warranted Characteristics This section lists the various warranted characteristics that describe the TDS 500B TDS 600B and TDS 7004 oscilloscopes Electrical and environmen tal characteristics are included Warranted characteristics are described in terms of quantifiable performance limits which are warranted NOTE In these tables those warranted characteristics that are checked in the procedure Performance Verification appear in boldface type under the column Name As stated above this section lists only warranted characteristics A list of typical characteristics starts on page 1 23 Performance Conditions The performance limits in this specification are valid with these conditions m The oscilloscope must have been calibrated adjusted at an ambient tempera ture between 4 20 C and 30 C m oscilloscope must be in an environment with temperature altitude humidity and vibration within the operating limits described in these specifications The oscilloscope must have had a warm up period of at least 20 minutes m The oscilloscope must have had its signal path compensation routine last executed after at least a 20 minute warm up period at an ambient temperature within 5 C of the current ambient temperature TDS 500B TDS 600B and TDS 700A Service Manual 1 15
103. S 600B and TDS 700A Service Manual 5 23 Adjustment Procedures b Make the contrast adjustment m Locate 404 It is one of the adjustments on the left side of the instrument located just ahead of the fan It is the fifth adjustment from the fan m Monitor the luminance at center screen using a J16 photometer and a luminance probe m Adjust R404 CONTRAST for a reading of 36 foot lamberts for 640 0077 display assemblies where equals 06 or above Use a reading of 40 foot lamberts for 640 0077 assemblies where equals 05 or below NOTE The adjustments for contrast and brightness interact with each other 5 Restore the oscilloscope to normal operation a Restore the dip switch to the settings that follow Open Closed X b Power off the oscilloscope See Removal and Installation Procedures in Section 6 to reinstall the cabinet and other modules removed in step 1 5 24 TDS 500B TDS 600B and TDS 700A Service Manual Maintenance This section contains the information needed to do periodic and corrective maintenance on the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes The following subsections are included Preparation Introduction plus general information on preventing damage to internal modules when doing maintenance Inspection and Cleaning Information and procedures for inspecting the oscilloscope and cleaning its external and internal modules Remo
104. S 700A Service Manual
105. SSY TDS520A TDS620A TDS 524A 80009 614 0918 02 614 0914 03 1 FNT PANEL ASSY TDS 540A TDS 544A TDS 640A TDS 644A 80000 614 0914 03 614 0937 00 1 FNT PANEL ASSY TDS540B TDS754A 80009 614 0937 00 614 0934 03 1 FNT PANEL ASSY TDS520B TDS 724A TDS 782A 80009 614 0934 03 23 366 2170 00 1 KNOB DIMP LED GPK 1 7 DIA TK1163 ORDER BY DESC 10 6 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List X boo 3 Co 9 00 0 Q0 8S 0000000 Figure 10 1 External Modules 10 7 TDS 500B TDS 6 TDS 700 Service Manual Mechanical Parts List Replaceable Parts List Fig amp Index Num ber 2 1 2 3 10 11 12 13 14 15 16 17 18 19 NOT SHOWN 10 8 Serial No Effective Tektronix Part Number 212 0189 00 119 4615 00 671 3488 00 Discont d 671 3693 00 441 1902 01 334 7966 02 131 1315 01 679 2437 00 407 3825 00 386 6182 00 386 5872 00 131 0890 01 348 1300 00 211 0730 00 671 2841 00 671 2848 00 671 3739 01 671 3744 00 671 3314 00 671 3462 01 671 3953 00 671 3949 00 671 3740 01 259 0101 01 343 0088 00 407 3878 00 407 3877 00 441 1901 00 334 9110 00 348 1422 00 Serial No Qty PrP FP N O N Name amp Description SCR ASSEM WSHR 8 32 X 0 500 P NH STL T 20 FAN DC TUBEAXIAL AS SY 24V 6W 2800 1600 RPM CIRCUIT BD ASSY COLOR PROCESSOR DISPLAY All EXCHANGE ITEM TDS 64
106. Service Manual Tektronix TDS 500B 600B amp TDS 700A Digitizing Oscilloscopes 070 9721 02 ce Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to the Safety Summary prior to performing service Copyright Tektronix Inc All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc Box 1000 Wilsonville 97070 1000 TEKTRONIX and are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three 3 years from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designate
107. Set the horizontal SCALE to 200 us Press SET LEVEL TO 50 Use the vertical POSITION knob to center the display on screen Press SHIFT then press ACQUIRE MENU Press the main menu button Mode then press the side menu button Average Select 128 averages with the keypad or the general purpose knob 2 Confirm that the Probe Compensator signal is within limits for frequency a Measure the frequency of the probe compensation signal Press MEASURE then press the main menu button Select Measrmnt for Ch Repeatedly press the side menu button more until Frequency appears in the side menu its icon is shown at the left Press the side menu button Frequency b Check against limits CHECK that the CH 1 Freq readout is within 950 Hz to 1 050 kHz inclusive See Figure 4 23 Enter frequency on test record Press MEASURE then press the main menu button Remove Measrmnt for Ch1 Press the side menu Measurement 1 TDS 500B TDS 600B and TDS 700A Service Manual 4 63 Performance Tests Run 250kS s Average C1 Freq 1 0000kHz M 20005 Chi 7 242mV feb 1994 11 32 40 COICOCO CO C9 C9 cC Figure 4 23 Measurement of Probe Compensator Frequency Save the probe compensation signal in reference memory m Press SAVE RECALL WAVEFORM then press the main menu button
108. TDS 500B TDS 600B and TDS 700A Service Manual 6 71 Troubleshooting dbdbdbHp 88230088 Q 01540 5 ae expl db mnnnn Cc 1 ym p 0000707 UUUUUUU Pin5 Pin Pin 9 Pin 11 5 Figure 6 39 A10 Acquisition Module View of Lower Right Corner 6 72 TDS 500B TDS 600B and TDS 700A Service Manual E ssSH Options and Accessories This section describes the various options as well as the standard and optional accessories that are available for the TDS 500B TDS 600B and TDS 700A Oscilloscope Options Tektronix will ship the options shown in Table 7 1 Table 7 1 Options Option Label Description 1 Universal European 220 V 50 Hz power cord power cord A2 UK power cord 240 V 50 Hz power cord gt A3 Australian power cord 240 V 50 Hz power cord A4 North American power 240 V 60 Hz power cord cord A5 Switzerland power cord 220 V 50 Hz power cord 05 Video trigger Oscilloscope comes with tools for investigating events that occur when a video signal generates a horizontal or vertical sync a pulse These tools allow investiga
109. TDS 680B 684B 782A amp 784A 1GHz TDS 520B 540 620B 644B 724A amp 754A 500 MHz Set the test signal amplitude for about five divisions on screen Now fine adjust the generator output until the CH 1 Amplitude readout indicates the amplitude is 500 mV Readout may fluctuate around 500 mV Disconnect the leveling head at CH 1 and reconnect it to CH 1 through a 5X attenuator d Repeat step 2 substeps b and c only since only the full bandwidth is to be checked here NOTE You just checked the trigger sensitivity If desired you may repeat steps 1 through 4 for the other channels CH2 CH3 5 Disconnect the hookup Disconnect the cable from the channel last tested TDS 500B TDS 600B and TDS 700A Service Manual 4 57 Performance Tests Output Signal Checks The procedure that follows checks those characteristics of the output signals that are listed as checked under Warranted Characteristics in Specifications The oscilloscope outputs these signals at its front and rear panels Check Outputs CH 3 Equipment Re AX1 on some models quired Main and Delayed Trigger Two 50 precision cables Item 5 One calibration generator Item 10 Prerequisites See page 4 15 Also the Digitizing Oscilloscope must have passed Check DC Voltage Measurement Accuracy on page 4 29 See Inout Channels vs Model on page 4 2 1 Install the test hookup and preset the instrument controls Calib
110. Table 1 13 Warranted Characteristics Output Ports Probe Compensator and Power Requirements Name Description Characteristic Vout HI Vout LO Logic Levels Main and Delayed Trigger Outputs Limits 22 5 V open circuit 21 0 V into a 50 Q load to ground lt 0 7 V into a load of lt 4 mA 0 25 V into a 50 load to ground 1 18 TDS 500B TDS 600B and TDS 700A Service Manual Warranted Characteristics Table 1 13 Warranted Characteristics Output Ports Probe Compensator and Power Requirements Cont Description Limits 0 5 V base top 1 into a 250 load Frequency 1 kHz 5 For TDS 600B 20 mV division 20 into a 1 load 10 mV division 20 into a 50 load For TDS 500B 700A 22 mV division 20 into a 1 MQ load 11 mV division 20 into a 50 load 90 to 250 continuous range CAT Il Source Frequency 45 Hz to 440 Hz Power Consumption lt 300 W 450 VA 1 CH3 signal out is present at the rear panel if CH 3 AUX 1 on the TDS 620B or 680B is selected as the trigger source for the main and or delayed trigger systems It is not available when a channel other than CH3 AUX 1 on the TDS 620B or 680B is the source for the Video Trigger when Option 05 is installed Characteristic Output Voltage Output Voltage and Frequency Probe Compensator Output Voltage Signal Out CH 31 Source Voltage Table 1 14 Warranted Chara
111. able That is it does not move horizontally or vertically Also CONFIRM that the waveform on the screen has one positive pulse and a number of negative pulses See Figure 4 30 4 72 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Tek Run 1 00MS s Sample Fine Scale 5 0 Chi j Fine Scale 25 0mV Positive pulse 4 50 Vid Chi 1 Bandwidth MEE position offset Cal Probe 250 MHZ ie 0 div 0v initialized Figure 4 30 Triggered Signal Range Test 75 mV p Disconnect all test equipment TSG121 from the digitizing oscilloscope 5 Check 60 Hz Rejection a Setup oscilloscope for 60 Hz Rejection Test m Use the keypad to set the Fine Scale to 282 mV press 282 SHIFT m then ENTER m Press WAVEFORM OFF m Press CH2 m Press VERTICAL MENU W Use the keypad set the fine scale to 2 V press 2 then ENTER m Press HORIZONTAL MENU m Use the keypad to set the horizontal scale div to 5 ms press 5 SHIFT m then ENTER b Setup 60 Hz signal generator Connect the output of the signal generator to the CH2 input through a 50 2 cable See Figure 4 31 TDS 500B TDS 600B and TDS 700A Service Manual 4 73 Performance Tests Digitizing Oscilloscope Signal Generator 50 O Cable Figure 4 31 60 Hz Rejection Tes
112. ad the following operating instructions These instruc tions are at the level appropriate for servicing these Digitizing Oscilloscopes The User Manual contains more complete operating instructions Additional instructions are integrated into the service procedures found in later sections of this manual For instance the procedures found in the section Performance Verification contain instructions for making the front panel settings required to check each instrument characteristic included there Also the general instructions for operating these Digitizing Oscilloscopes internal diagnostic routines are found in Section 6 Maintenance You may also find the Product Description in Section 1 useful for understanding how the oscilloscope functions Figure 2 1 on page 2 8 shows the screen layout This figure illustrates a full graticule You may also select a grid crosshair or frame graticule from the display menu Push the principal power switch found on the rear panel of the oscilloscope then push the ON STBY standby switch to toggle the oscilloscope into operation The switch at the rear panel is the true power disconnect switch The ON STBY standby switch simply toggles operation on and off WARNING The principal power switch at the rear panel is the true power disconnect switch The ON STBY standby switch simply toggles operation on and off When connected to a power source and when the principal power switch is on the interna
113. allation Procedures b care not to bind or snag the cabinet on internal cabling redress cables an necessary c When sliding the cabinet be sure that the front edge of the cabinet aligns with the groove containing the EMI shield on the front casting d Be sure that the ridge around the rear chassis slides into the groove containing a second EMI cable on the rear of the cabinet e When reinstalling the four screws at the rear panel tighten them to 16 foot Ibs torque f Seethe procedure Line Fuse and Line Cord to reinstall the line cord which completes the oscilloscope reassembly 6 20 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures 5555555555 55 55555959550 5 555595555555 555565555565 Figure 6 6 Rear Cover and Cabinet Removal 6 21 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures Front Cover Trim Ring 6 22 Menu Buttons and Attenuator Panel 1 Assemble equipment and locate modules to be removed No tools are needed Locate the modules to be removed in the locator diagram External Modules Figure 6 1 2 Orient the oscilloscope Set the oscilloscope so its rear is down on the work surface and its bottom is facing you 3 Remove the front cover Grasp the front cover by its left and right edges and snap it off of the front subpanel When r
114. and 3 in Figure 6 15 make sure that they remain plugged in on both ends TDS 500B TDS 600B and TDS 700A Service Manual 6 35 Removal and Installation Procedures A11 Processor Display 6 36 b See the procedures 414 D1 Bus and Analog Power and Digital Power Cables page 6 29 A23 SerPar Board page 6 31 and Rear Cover and Cabinet page 6 18 to complete reassembly of the oscilloscope To ensure the Video Trigger is working correctly perform the Diagnos tics procedure on page 6 57 Additional Modules Removed D1 bus and analog and digital power cables A23 Board SerPar Board and if option 05 is installed A29 Video Trigger Board 1 Assemble equipment locate modules to be removed a b Have handy a screwdriver with a size 15 Torx 9 tip Items 1 and 2 Locate the modules to be removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 Do the procedure A74 DI Bus and Analog Power and Digital Power Cables that precedes this procedure to remove those interconnect cables Do the procedure A23 SerPar Board and if option 05 is installed do the procedure A29 Video Trigger Board Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its rear is facing you Disconnect the fan from processor display board Unplug the fan s power cable from J20 Remove the processor display board Use Figure 6 16 as a guide while doing the following subs
115. ariable amplitude of at least 60 V Wavetek 9100 with options 100 and 250 or Tektronix PG 506A Calibration Generator Probe Adjustment 11 Generator DC Calibration Variable amplitude to 104 V accuracy to 0 1 Wavetek 9100 or Data Precision 8200 Software based Adjustments 12 Generator Leveled Sine Wave Medium F requency 200 kHz to 250 MHz Variable amplitude from 5 mV to 4 Vp p into 50 flatness lt 3 96 harmonic content 274 harmonic down 30 dB from fundamental all others down 40 dB TDS 500B TDS 600B and TDS 700A Service Manual Rohde amp Schwarz SMY Sine Wave Generator URV 35 Level Meter with NRV Z8 Power Sensor and RVZ Power Splitter Or Tektronix SG 5031 or SG50301 Leveled Sine Wave Generator Software based Adjustments Adjustment Procedures Table 5 4 Test Equipment Fixtures and Supplies Cont Item Number and Description 13 Generator Leveled Sine Wave High F requency Minimum Requirements 250 MHz to 1 GHz Variable amplitude from 0 5 V to 4 Vp p into 50 6 MHz reference harmonic content 274 harmonic down 25 dB from fundamental all others down 40 dB Example Rohde amp Schwarz SMY Sine Wave Generator URV 35 Level Meter with NRV Z8 Power Sensor and RVZ Power Splitter Or Tektronix SG 5041 Leveled Sine Wave Generator with its leveling head or a Tektronix 56 50301 Programmable Leveled Sine Wave Generator with its leveling
116. be such as the P6243 P6245 or P6139A quired Prerequisites None 1 Install the test hookup and preset the oscilloscope controls a Hook up the signal source Install the probe on CH 1 Connect the probe to PROBE COMPENSATION SIGNAL on the front panel connect the probe ground to PROBE COMPENSATION GND See Figure 4 3 on page 4 8 b Initialize the oscilloscope W Press save recall SETUP Press the main menu button Recall Factory Setup then press the side menu button OK Confirm Factory Init c Modify default settings m Set the vertical SCALE to 200 mV m Set the horizontal SCALE to 200 us m Press CLEAR MENU to remove the menus from the screen 2 Verify that the time base operates Confirm the following statements 4 10 TDS 500B TDS 600B and TDS 700A Service Manual Brief Procedures a One period of the square wave probe compensation signal is about five horizontal divisions on screen for the 200 us horizontal scale setting set in step 1c b Rotating the horizontal SCALE knob clockwise expands the waveform on screen more horizontal divisions per waveform period counter clockwise rotation contracts it and returning the horizontal scale to 200 us returns the period to about five divisions The horizontal POSITION knob positions the signal left and right on screen when rotated 3 Remove the test hookup Disconnect the probe from the channel input and the probe compensation terminals Verify th
117. been done within the recommended calibration interval and at a temperature within 5 C of the present operating temperature If at the time you did the prerequisite Self Tests the temperature was within the limits just stated consider this prerequisite met m The Digitizing Oscilloscope must have been last adjusted at an ambient temperature between 20 C and 430 C must have been operating for warm up period of at least 20 minutes and must be operating at an ambient temperature between 4 and either 4 45 C for the TDS 600B or 450 C for the TDS 500B and 700A The warm up requirement is usually met in the course of meeting the Self Tests and Functional Tests prerequisites listed above TDS 500B TDS 600B and TDS 700A Service Manual 4 15 Performance Tests Equipment Required Table 4 1 Test Equipment Item Number and These procedures use external traceable signal sources to directly check warranted characteristics The required equipment list follows this introduction Description Minimum Requirements Example Purpose 1 Attenuator 10X Ratio 10X impedance 50 connec Tektronix part number Signal Attenuation two required tors female BNC input male BNC 011 0059 02 output 2 Attenuator 5X Ratio 5X impedance 50 connec Tektronix part number Signal Attenuation tors female BNC input male BNC 011 0060 02 output 3 Adapter BNC female to BNC female to Clip Leads Tektronix part numbe
118. bly of the oscilloscope TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures All Processor Display Board page 6 36 m If option 05 is installed A29 Video Trigger Board page 6 32 Wm A74 DI Bus and Analog Power and Digital Power Cables page 6 29 m 23 SerPar Board page 6 31 m Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 W Rear Cover and Cabinet page 6 18 Rear Panel Cables 1 Assemble equipment and locate modules to be removed Have available a pair of needle nose pliers Item 6 and a inch nut driver Item 7 2 If removing the GPIB cable do the following substeps a Unplug the GPIB cable from its jack J35 on the processor display board b Working from the rear panel and using the inch nut driver unscrew the two hex headed mounting posts that secure the cable to the rear chassis Working from inside the oscilloscope lift the cable out of the rear chassis 3 If removing any cable connected to the rear panel BNC connectors do the following substeps a Do the procedure 0 Acquisition Board on page 6 39 b Pull out the cables for SIGNAL OUTPUT AUX TRIGGER INPUT MAIN TRIGGER OUTPUT and DELAYED TRIGGER OUTPUT from J1201 J1001 J1000 and J1550 on A10 4 Reinstallation Reverse substeps in step 2 and 3 to reinstall any cables removed A10 Acquisition Board 1 Assemble equipment and locate modules to be removed a Hav
119. bration TDS 600B Performance Test Delay Between Channels Delay Between Channels Time Base System Long Term Sample Rate Delay Time 500 ns 10 ms Trigger System Accuracy Pulse Glitch or P ulse Width Hor scale lt 1 us Lower Limit Upper Limit Certificate Number R H 96 Technician Minimum Incoming Outgoing Maximum ERN CNN N A 6 5 ns 6 5 ns Pulse Glitch or Pulse Width Hor scale gt 1 us Lower Limit Upper Limit Main Trigger DC Coupled Positive Slope Main Trigger DC Coupled Negative Slope Delayed Trigger DC Coupled Positive Slope Delayed Trigger DC Coupled Negative Slope CH1 Sensitivity 50 MHz Main CH1 Sensitivity 50 MHz Delayed CH1 AUX Trigger Input CH1 Sensitivity 1 GHz Main CH1 Sensitivity 1 GHz Delayed Output Signal Checks MAIN TRIGGER OUTPUT 1 MQ High Low MAIN TRIGGER OUTPUT 50 High Low Pass Fai 2 1 us 2 1 us 10 137 V 10 137 V 10 137 V 10 137 V Pass Fai Pass Fai Pass Fai Pass Fai Low lt 0 7 V Low x 0 25 V DELAYED TRIGGER OUTPUT 50 DELAYED TRIGGER OUTPUT 1MO gt IV Un lt Low lt 0 25 V Low x 0 7 V TDS 500B TDS 600B and TDS 700A Service Manual 4 21 Performance Tests TDS 600B Test Record Cont Instrument Serial Number Temperature Date of Calibration TDS 600B Performance Test CH 3 or AX1 SIGNAL OUTPUT 1MQ CH 3 or AX1 SIGNAL OUT
120. cale Set the vertical SCALE to one of the settings listed in Table 4 2 that is not yet checked Start with the first setting listed Wm Press VERTICAL MENU Press the main menu button Fine Scale m Use the keypad to enter the vertical scale For the 1 mV setting press 1 SHIFT m then ENTER For the 101 mV setting press 101 SHIFT m then ENTER For the 1 01 V setting press 1 01 then ENTER W Press CLEAR MENU Table 4 2 DC Offset Accuracy Zero Setting Vertical TDS 500B 700A Vertical Scale Position and TDS 600B Offset Offset Accuracy Setting Offset Setting Accuracy Limits Limits 1 21 mV 1 6 mV 101 mV 75 6 mV 25 1 mV 1 01 V 0 756 mV 251 mV 1 Vertical position is set to 0 divisions and vertical offset to 0 V when the oscilloscope is initialized in step 1 c Display the test signal The waveform position and offset were initial ized for all channels in step 1 and are displayed as you select each channel and its vertical scale d Measure the test signal Align the active cursor over the waveform by rotating the general purpose knob Ignore the other cursor See Figure 4 4 e Read the measurement results at the absolute cursor readout not the delta A readout on screen That is read the offset relative to the ground reference See Figure 4 4 f Check against limits Do the following subparts in the order listed m CHECK that the measurement results are within the limits listed f
121. channels 50000 1 000 di 10 divs TDS 500B amp TDS 700A all channels 75000 1 500 di 15 divs Option 1M equipped only TDS 500B amp TDS 700A all channels 100000 2 000 divs 10 divs Option 1M equipped only TDS 500B amp TDS 700A all channe 130000 2 600 divs 13 divs Option 1M equipped only ivs TDS 5208 TDS 724A amp TDS 782A 250000 5 000 d 10 divs channel only TDS 540B TDS 754A amp TDS 784A two channels only Option 1M equipped only TDS 540B TDS 754A amp TDS 784A one 500000 10 000 divs 10 divs channel only Option 1M equipped only 1 Fit to Screen setting 2 Fitto Screen off preserves 50 samples division in a 1 2 5 sec division sequence 3 Fit to Screen on lets the samples division and the sec division sequence vary 4 All channels means all that may be displayed at one time four channels for some models two for others See Table 1 1 and its footnote on page 1 1 Trigger System The triggering system supports a varied set of features for triggering the signal acquisition system Trigger signals recognized include m Edge main and delayed trigger systems This familiar type of triggering is fully configurable for source slope coupling mode auto or normal and holdoff 1 4 TDS 500B TDS 600B and TDS 700A Service Manual Specifications Acquisition Control m Logic main trigger system This type of triggering can be based on pattern asynchronous or sta
122. channels Attach the PROBE COMPENSATION signal to display defective a defective channel s BNC on the front of the waveforms oscilloscope and swap these two channels coaxes to the A10 Acquisition module For all the channels is the signal on the display a 1 kHz 0 250 V square wave The Acquisition Attenuator Interface is ok Attach the PROBE COMPENSATION signal to the CH 1 BNC on the front of the oscilloscope Remove the coax connector from J 1400 on the A10 Acquisition module Is a 1 kHz 0 250 V square wave displayed now Replace the A10 Acquisition module the detached end of the coax Is there a 1 kHz 0 250 V square wave on the coax Power the oscilloscope off and disconnect the cable attached to J 1153 on the A10 Acquisition module Power on and probe J 1153 pins 14 16 18 and 20 Probe 700 butDO NOT Are these REMOVE the cable from the pins 15 V 45 V connector The voltages will 16 and 8 Are these Power Supply 5 1 V and 15 V change if the A10 Acquisition pins 15 V 5 V troubleshooting respectively module is not connected to 5 1 V and 15 V procedure the power supply respectively Yes While turning the vertical SCALE knob does J 1153 pin 22 pulse swing between 45 V and While turning the vertical SCALE knob again does J 1153 pin 26 swing between 45 V turning the vertica
123. coaxial cable to one side of a BNC T connector Connect the Sense output of the generator through a second dual banana connector followed by a 50 2 precision coaxial cable to other side of the BNC T connector Now connect the BNC T connector to CH 1 b Initialize the oscilloscope Press save recall Setup Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init 2 Confirm Main trigger system is within limits for Trigger level Threshold accuracy a Display the test signal Set the vertical SCALE to 200 mV Press VERTICAL MENU then press the main menu button Position Set vertical position to 3 divisions press 3 then ENTER on the keypad The baseline level will move down three divisions See Figure 4 17 on page 4 51 Press the main menu button Offset Set vertical offset to 10 volts with the keypad The baseline level will move off screen Set the standard output of the DC calibration generator equal to the offset 10 volts The DC test level will appear on screen See Figure 4 17 Measure the test signal Press SET LEVEL 50 Press TRIGGER MENU Read the measurement results from the readout below the label Level in the main menu not the trigger readout in the graticule area TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests c Read results Check against limits See Figure 4 17 m CHECK that the Level readout i
124. connect the cables from the channel inputs and the rear panel outputs TDS 500B TDS 600B and TDS 700A Service Manual 4 61 Performance Tests Check Probe Equipment Re Compensator Output quired One female BNC to clip adapter Item 3 Two dual banana connectors Item 6 One BNC T connector Item 7 Two 50 precision cables Item 5 One DC calibration generator Item 9 Prerequisites See page 4 15 Also the Digitizing Oscilloscope must have passed Check Accuracy For Long Term Sample Rate Delay Time and Delta Time Measurements on page 4 43 1 Install the test hookup and preset the instrument controls a Hook test signal m Connect one of the 50 Q cables to CH 1 See Figure 4 22 m Connect the other end of the cable just installed to the female BNC to clips adapter See Figure 4 22 m Connect the red clip on the adapter just installed to the PROBE COMPENSATION SIGNAL on the front panel connect the black clip to PROBE COMPENSATION GND See Figure 4 22 Digitizing Oscilloscope Black Lead to GND Female BNC to Clip Adapter 50 Coaxial Cable Figure 4 22 Initial Test Hookup b Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init 4 62 TDS 500 TDS 600B and TDS 700A Service Manual Performance Tests c Modify the initialized front panel control settings
125. contains a collection of procedures for adjusting these Digitizing Oscilloscopes to meet warranted limits m Maintenance contains information and procedures for doing preventive and corrective maintenance of these Digitizing Oscilloscopes Instructions for TDS 500B TDS 600B and TDS 700A Service Manual XV Preface Manual Conventions Modules Channels Safety Symbols xvi cleaning for module removal and installation and for fault isolation to a module are found here W Options contains information on servicing any of the factory installed options that may be present in your oscilloscope Electrical Parts List contains a statement referring you to Mechanical Replaceable Parts where both electrical and mechanical modules are listed m Diagrams contains a block diagram and an interconnection diagram useful for isolating failed modules m Mechanical Parts List includes a table of all replaceable modules their descriptions and their Tektronix part numbers This manual uses certain conventions which you should become familiar with before doing service Throughout this manual any replaceable component assembly or part of these Digitizing Oscilloscopes is referred to generically as a module In general a module is an assembly like a circuit board rather than a component like a resistor or an integrated circuit Sometimes a single component is a module for example each chassis part of the oscilloscope is a modu
126. controls a Hook up the test signal source m Set the output of a DC calibration generator to 0 volts m Connect the output of a DC calibration generator through a dual banana connector followed by a 50 99 precision coaxial cable to one side of a BNC T connector See Figure 4 5 m Connect the Sense output of the generator through a second dual banana connector followed by a 50 99 precision coaxial cable to the other side of the BNC T connector Now connect the BNC T connector to CH 1 See Figure 4 5 Output Sense Digitizing Oscilloscope DC Calibrator Dual Banana to BNC Adapters BNC T Connector 50 Coaxial Cables Figure 4 5 Initial Test Hookup b Initialize the oscilloscope W Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init c Modify the default settings m Press SHIFT then press ACQUIRE MENU Press the main menu button Mode then press the side menu button Average 16 2 Confirm input channels are within limits for DC accuracy at maximum offset and position Do the following substeps test CH 1 first skipping substep 2a since CH 1 is already selected from step 1 4 30 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests a Select an unchecked channel Press WAVEFORM OFF to remove the channel just confirmed from the display Press the
127. cteristics Environmental Description Atmospherics Temperature no diskette in floppy drive TDS 600B Operating 4 C to 5 C TDS 500B 700A Operating 4 C to 450 C Nonoperating 22 C to 460 C Relative humidity no diskette in floppy drive Operating 20 to 80 ator below 432 upper limit derates to 30 relative humidity at 45 Nonoperating 5 to 90 ator below 441 C upper limit derates to 30 relative humidity at 60 C Altitude To 4570 m 15 000 ft operating 12190 m 40 000 ft nonoperating Dynamics Random vibration floppy diskette not installed 0 31 g rms from 5 to 500 Hz 10 minutes each axis operating 3 07 g rms from 5 to 500 Hz 10 minutes each axis nonoperating TDS 500B TDS 600B and TDS 700A Service Manual 1 19 Warranted Characteristics Table 1 14 Warranted Characteristics Environmental Cont Name Description Emissions TDS 500B 700A 1 2 Meets or exceeds the requirements of the following standards FCC Code of Federal Regulations 47 CFR Part 15 SubpartB Class A European Community Requirements EN 55011 Class A Radiated Emissions EN 55011 Class A Conducted Emissions EN 50081 1 EN60555 2 Power Line Harmonic Emissions Emissions TDS 600B 2 Meets or exceeds the requirements of the following standards FCC Code of Federal Regulations 47 CFR Part 15 SubpartB Class A EN 50081 1 European Community Requirements 55022 Radiated Emissions Cla
128. d for signals having rise and fall times 2 20 ns Description Trigger Source Any Channel Auxiliary Accuracy 2 x Setting Net Offset 0 3 div x Volts div Setting Offset Accuracy Not calibrated or specified Input Auxiliary Trigger The input resistance is 21 5 kO the maximum safe input voltage is 20 V DC AC Trigger Position Error Edge Triggering Acquisition Mode Trigger Position Error Sample Average Envelope 1 Waveform Interval 1 ns 2 Waveform Intervals 1 ns Holdoff Variable Main Trigger For all Time Division ranges the minimum ho doff is 250 ns and the maximum holdoff is 12 seconds The minimum resolution is 8 ns for settings lt 1 2 ps Lowest Frequency for Successful Operation of Set Level to 50 Function Sensitivity Edge Trigger Not DC Coupled Sensitivities Logic Trigger and Events Delay DC Coupled4 Sensitivities Pulse Type Runt Trigger Sensitivities Pulse Type Trigger Width and Glitch Width Minimum Pulse and Rearm for Logic Triggering or Events Delay 30 Hz Trigger Source AC Noise Reject High Frequency Reject Low Frequency Reject Typical Signal Level for Stable Triggering Same as the DC coupled limits for frequen cies above 60 Hz Attenuates signals below 60 Hz Three times the DC coupled limits One and one half times the DC coupled limits from DC to 30 kHz A
129. d by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES
130. d rotate it 90 degrees counterclockwise Pull the line cord and clamp away to complete the removal Reverse procedure to reinstall TDS 500B TDS 600B and TDS 700A Service Manual 6 17 Removal and Installation Procedures 5 Reinstallation Do in reverse steps 3 and 4 to reinstall the line cord and then the line fuse Line Fuse Fuse Cap Figure 6 5 Line Fuse and Line Cord Removal EMI Gaskets See Rear Cover and Cabinet procedure on page 6 18 Rear Cover and Cabinet 1 Assemble equipment and locate modules to be removed a Have handy a screwdriver with a size T 20 Torx tip Items 1 and 3 b Make sure the oscilloscope s front cover is installed if it s not install it by snapping its edges over the trim ring Locate the rear cover and cabinet in the locator diagram External Modules Figure 6 1 2 Orient the oscilloscope Set the oscilloscope so its face is down with its front cover on the work surface and its bottom facing you 6 18 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures 3 Disconnect the line cord Unplug the line cord from its receptacle at the rear cover 4 Remove rear cover Remove the four screws securing the rear cover to the oscilloscope Lift off the rear cover 5 Remove the cabinet a At the rear of the cabinet grasp its left and right edges b Pull upward to slide the cabinet off the oscilloscope Take care not
131. d under Warranted Characteristics in Specifica tions Check Offset Accuracy Equipment Re Zero Setting quired None Prerequisites The oscilloscope must meet the prerequisites listed on page 4 15 See Input Channels vs Model on page 4 2 1 Preset the instrument controls a Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init Press CLEAR MENU to remove the menus from the screen b Modify the default settings Press SHIFT then press ACQUIRE MENU On the TDS 600B press the main menu button Mode then press the side menu button Average 16 On the TDS 500B and 700A press the main menu button Mode then press the side menu button Hi Res Press CURSOR Press the main menu button Function then press the side menu button H Bars Press CLEAR MENU Be sure to disconnect any input signals from all four channels 2 Confirm input channels are within limits for offset accuracy at zero offset Do the following substeps test CH 1 first skipping substep a since CH 1 is already set up to be checked from step 1 a Select an unchecked channel Press WAVEFORM OFF to remove the channel just confirmed from the display Then press the front panel button that corresponds to the channel you are to confirm TDS 500B TDS 600B and TDS 700A Service Manual 4 27 Performance Tests b Set the vertical s
132. ding time reference point for the right most waveform See Figure 4 11 on page 4 41 W Press CURSOR Press the main menu button Function then press the side menu button V Bars Press CLEAR MENU TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests m Align one V bar cursor to the time reference point of the left most waveform edge and the other cursor to the time reference point of the right most waveform edge by rotating the General Purpose knob Press SELECT to switch between the two cursors See Figure 4 11 on page 4 41 Read the measurement results at the A cursor readout not the readout on screen Tek Run 5 00GS s Cursor Function Read results 4 Display the waveforms 1 gt chi TO0mV E _ 100 E __ 500 Function Units seconds 2 3 Locate the time reference Align each cursor to the time points for these waveforms reference points Figure 4 11 Measurement of Channel Delay TDS 684B Shown g Check against limits CHECK that the cursor readout on screen is lt 100 ps for the TDS 600B or lt 50 ps for the TDS 500 700 h If the channel skew is within the limits enter time on the test record and proceed to step 3 Otherwise proceed with steps i through p i Use the cursors to measure the skew from to CH2 CH1 to C
133. dules are listed in Section 10 Mechanical Parts List Refer to that section for part numbers when using this manual TDS 500B TDS 600B and TDS 700A Service Manual 8 1 Electrical Parts List 8 2 TDS 500B TDS 600B and TDS 700A Service Manual E IE Diagrams This contains the block diagram and the interconnection diagram for the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes Symbols Graphic symbols and class designation letters are based on ANSI Standard Y32 2 1975 Abbreviations are based on ANSI 1 1 1972 Logic symbology is based on ANSI IEEE Std 91 1984 terms of positive logic Logic symbols depict the logic function performed and can differ from the manufacturer s data The tilde preceding a signal name indicates that the signal performs its intended function when in the low state Other standards used in the preparation of diagrams by Tektronix Inc are m Tektronix Standard 062 2476 Symbols and Practices for Schematic Drafting m ANSI Y14 159 1971 Interconnection Diagrams ANSI Y32 16 1975 Reference Designations for Electronic Equipment MIL HDBK 63038 1A Military Standard Technical Manual Writing Handbook TDS 500B TDS 600B and TDS 700A Service Manual 9 1 Diagrams A12 Front Panel Board Front Panel Menu S witches Switches Front Panel Knobs 26 A10 Acquisition P2 e Board 1201 gt 4 77 1550
134. dules need to be replaced Operating Environment Operating Temperature Ventilation Requirements A The following environmental requirements are provided to ensure proper operation and long instrument life Operate Digitizing Oscilloscopes where the ambient air temperature is from 4 C to 45 C 50 C for the TDS 500B and 700A with no diskette in the floppy drive Store the oscilloscopes in ambient temperatures from 22 C to 60 C with no diskette in the floppy drive After storage at temperatures outside the operating limits allow the chassis to stabilize at a safe operating temperature before applying power The Digitizing Oscilloscopes are cooled by air drawn in and exhausted through their cabinet side panels by an internal fan To ensure proper cooling of the oscilloscope allow at least two inches clearance on both sides and 3 4 inch on the bottom of the oscilloscope The feet on the bottom of the oscilloscope provide the required clearance when set on flat surfaces The top of the oscilloscope does not require ventilation clearance CAUTION If air flow is restricted the Digitizing Oscilloscopes s power supply may temporarily shut down Applying and Interrupting Power Power On Consider the following information when you power on or power off the instrument or when power is interrupted due to an external power failure Upon power on the oscilloscope runs a power on self check If it passes the oscil
135. dures Table 5 5 GPIB Board Configuration Board Settings GPIB PCII GPIB PCIIA Base 1 0 Address hex 2B8 2E1 Interrupt Line 7 DMA Channel 1 1 Systems using the combination card GPIB PCII IIA can be configured as either a GPIB PCII or a GPIB PCIIA Software Installation STOP ALWAYS use this installation procedure when installing this software on a new computer This installation program uses parameters you supply see step 2 substep a to create a custom start up file on your hard disk directory After installation the software will instruct you to run this start up batch file whenever you do software based adjustments so it can configure your computer properly before it runs the adjustment program Do not simply copy the software files from one computer to another since the start up batch file you copy may not match the computer you copy it to 1 Create a working disk Using the proper DOS commands copy the Adjustment Software disk to a working disk 2 Install the software to the hard disk a Install your working disk in a floppy drive and type install The software will ask you to specify the hard disk on which to install the adjustment software It will also prompt you to specify several GPIB card configura tion parameters b The adjustment software will be installed in a directory called TDS600 ADJ or TDS700 ADJ on your hard drive 3 Store your installation disk Remove your installation disk and store
136. e Processor Display numbers from 1 e with no of hex numbers module towards the period preceding pausing to back of the them flash c oscilloscope and cycle power 1 Perform the Display troubleshooting Does Yen 1Note Set all the switches on S1001 back to procedure 1 DS1 flash 8 tne then display the sequence All DRAM of hex numbers Processor Display pausing to module 1 flash the closed position and cycle power before performing another procedure Replace the All DRAM Processor Display module 1 i es Note The replacement module may not have the correct firmware loaded See page 6 58 for details on firmware updates Figure 6 26 Primary Troubleshooting Procedure Cont 6 60 TDS 500B TDS 600B TDS 700A Service Manual Troubleshooting This procedure assumes that the oscilloscope is up and running and you can read the display Select the extended diagnostics Does the menu and run all the test suites the Are any display report discussion of the Diagnostics on faes any errors page 6 57 explains how to do this reported The oscilloscope is ok Regardless of other failures did the Processor fail but the roc Interface and FP Proc Interface pass Yes S Perform the P rocessor Acquisition you VE faulty module using these troubleshooting procedures procedures
137. e 4 40 Read note shown below NOTE The pulse duration and period adjustments are critical in making this measurement If the pulse duration and or the duty cycle are not stable the FLEXFMT function may not function You must take care when making these adjustments TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Run 10 0MS s Sample Select Measurement chi width 400ns i ow resolution Ch1 Period 21 0005 Low signal Frequency amplitude Positi width Negative width MIU 252mv w Ms oous Chi 135mV eres i ir Hatte iis i4 s Remove Gating Reference Measrmnt Setup Snapshot for Ch Measrmnt OFF Histogram Levels Figure 4 40 Sync Duty Cycle Test Critically Adjusted Pulse m Press TRIGGER MENU Press the main menu Type pop up until you select Video If the TRIG D LED is not lighted check that the CH1 Width and CHI Period measurements are adjusted correctly See note above CONFIRM that the setup is correct and the oscilloscope will trigger m CONFIRM that the TRIG D LED is lighted and the waveform is stable m Disconnect the signal source from wait a few seconds then reconnect the signal m CONFIRM that the TRIG D LED is lighted and the
138. e Main and Equipment Re Delayed Trigger Systems quired One probe such as the P 6243 P6245 or P6139A Prerequisites None 1 Install the test hookup and preset the oscilloscope controls a Hook up the signal source Install the probe on CH 1 Connect the probe to PROBE COMPENSATION SIGNAL on the front panel connect the probe ground to PROBE COMPENSATION GND See Figure 4 3 on page 4 8 b Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init c Modify default settings m Set the vertical SCALE to 200 mV m Set the horizontal SCALE for the M main time base to 200 us m Press TRIGGER MENU Press the main menu button Mode amp Holdoff Press the side menu button Normal m Press CLEAR MENU to remove the menus from the screen TDS 500B TDS 600B and TDS 700A Service Manual 4 11 Brief Procedures 4 12 Verify that the main trigger system operates Confirm that the following statements are true The trigger level readout for the main trigger system changes with the trigger LEVEL knob The trigger LEVEL knob can trigger and untrigger the square wave signal as you rotate it Leave the signal untriggered which is indicated by the display not updating Pressing SET LEVEL TO 50 triggers the signal that you just left untriggered Leave the signal triggered Verify that the delayed trigger s
139. e display circuit board J170 J305 and J570 Loosen the screw on the video board that holds the CRT sockets Then pull back on the video board slightly This separates the board from the socket c Remove the two screws that secure the band circling the front of display tube to the front subpanel Carefully guide display tube forward to partially remove it from the front subpanel and to access the anode lead connected to the display tube WARNING High voltage is present on the anode lead Before unplugging the anode in the following substep you must discharge it ground a flat bladed screwdriver Item 5 with an insulated handle to the chassis through a suitable grounding strap Next probe under the insulating cap of the anode lead and touch the lead s metal conductor to discharge Repeat After unplugging the anode in substep d touch its metal conductor to the chassis for a few minutes to further ensure discharge d Discharge the anode lead as described in the immediately proceeding WARNING unplug it from the display tube and discharge that lead again see WARNING e Besure you have read the WARNING on display tube handling and storage found at the start of this display tube removal procedure Then pull the display tube out through the front subpanel to complete removal Store as directed in the previous WARNING message TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures
140. e handy a screwdriver with a size T 15 Torx tip Items 1 and 2 b Locate the modules to be removed including those listed under Additional Modules Removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 c Do the procedure A74 DI Bus and Analog Power and Digital Power Cables page 6 29 to remove the D1 bus and the interconnect cables TDS 500B TDS 600B and TDS 700A Service Manual 6 39 Removal and Installation Procedures 6 40 d Do the procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 Orient the oscilloscope Set the oscilloscope so its top is down on the work surface and its front is facing you Remove the Acquisition Board Use Figure 6 18 as a guide a Disconnect the cables from CH 3 SIGNAL OUT at J1201 AUX TRIG INPUT at J1550 MAIN TRIG OUTPUT at J1000 DELAYED TRIG OUTPUT at J1001 If the option 05 video board is installed disconnect the coax cable attached to J1500 Remove the six screws that mount the acquisition board to the main chassis Remove the five front panel screws that attach the frame to the attenua tor portion of the A10 Acquisition board Lift the board away from the main chassis to complete removal Reinstallation Do in reverse order substeps 3a to 3d reversing each step to reinstall the acquisition board Then see the following procedures in the order listed to complete reassembly of the oscilloscope A14 DI Bus
141. e low voltage power supply The front panel also generates the probe compensation signals SIGNAL and GND Rear Panel The GPIB connector provides access to stored waveforms and allows external control of the oscilloscope You can make hardcopies on the GPIB RS 232 and Centronics ports Low Voltage Power low voltage power supply is a switching power converter with active power Supply factor control It supplies power to all of the circuitry in the oscilloscope The principal POWER switch located on the rear panel controls all power to the oscilloscope including the Low Voltage Power Supply The ON STBY switch located on the front panel also controls all of the power to the oscillo scope except for part of the circuitry in the Low Voltage Power Supply The power supply sends a power fail PF warning to the processor system if the power is going down Fan The fan provides forced air cooling for the oscilloscope It connects to 25 V from the Low Voltage Power Supply by way of the 11 DRAM Processor Dis play module TDS 500B TDS 600B and TDS 700A Service Manual 3 3 Theory of Operation 3 4 TDS 500 TDS 600B TDS 700A Service Manual M DU D ea C Performance Verification Procedures Two types of Performance Verification procedures can be performed on this product Brief Procedures and Performance Tests You may not need to perform all of these procedures depending on what you want to accomplish
142. ecall Factory Setup W Press the side menu button OK Confirm Factory Init 4 8 TDS 500B TDS 600B and TDS 700A Service Manual Brief Procedures 2 Verify that all channels operate Do the following substeps test CH 1 first skipping substep a and b since CH 1 is already set up for verification and as the trigger source from step 1 a Select an unverified channel m Press WAVEFORM OFF to remove the channel just verified from display Press the front panel button that corresponds to the channel you are to verify m Move the probe to the channel you selected b Match the trigger source to the channel selected m Press TRIGGER MENU Press the main menu button Source Press the side menu button that corresponds to the channel selected Ch2 or Ch4 Some TDS models use Ax1 Ax2 instead of Ch3 and c Setup the selected channel Set the vertical SCALE to 200 mV m Set the horizontal SCALE to 200 us Press CLEAR MENU to remove any menu that may be on the screen d Verify that the channel is operational Confirm that the following statements are true m The vertical scale readout for the channel under test shows a setting of 200 mV and a square wave probe compensation signal about 2 5 divisions in amplitude is on screen See Figure 4 1 on page 4 3 to locate the readout m The vertical POSITION knob moves the signal up and down the screen when rotated m Turning the vertical SCA
143. ee classes of adjustments as shown in Table 5 1 Each class contains one or more individual calibration tests CATS and an internal compensation routine SPC The Adjustment Software provides you with instructions for running each of the tests these software based adjustments are made internally by the adjustment software and all adjustments can be done without removal of the oscilloscope cabinet Signal Path Compensation SPC This internal routine is not an adjustment It is a temperature compensation routine that compensates for the current operating temperature to optimize oscilloscope performance Table 5 1 Calibration Tests Class of Adjustment CATS Tests Voltage Reference CVR CAL TEMPERATURE SET SPC Frequency Response SPC HF_CAL Pulse Trigger SPC TRIG_POS CAL PNP_LATENCY GLITCH_TRIG_CAL Partial Adjustment adjustment software will allow you to make individual adjustments However usually all adjustments are made unless you are adjusting circuits in the course of troubleshooting the oscilloscope Read the information under TDS 500B TDS 600B and TDS 700A Service Manual 5 3 Adjustment Procedures Adjustment After Repair Adjustment Dependencies 5 4 Complete Adjustment Adjustment After Repair and Adjustment Dependencies before doing an individual adjustment After the removal and replacement of a module due to electrical failure you must either do a complete adjustment or no adjust
144. eference Waveforms Waveform Lost Saved Setups Setup Lost Repackaging Instructions 2 4 Use a corrugated cardboard shipping carton having a test strength of at least 2775 pounds and with an inside dimension at least six inches greater than the instrument dimensions If the instrument is being shipped to a Tektronix Service Center enclose the following information the owner s address name and phone number of a contact person type and serial number of the instrument reason for returning and a complete description of the service required TDS 500B TDS 600B and TDS 700A Service Manual Installation Seal the shipping carton with an industrial stapler or strapping tape Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations Installed Options Your instrument may be equipped with one or more instrument options Except for the line cord options described by Table 2 2 on page 2 2 of this section all options and optional accessories are listed and described in Section 7 Options For further information and prices of instrument options see your Tektronix Products catalog or contact your Tektronix Field Office TDS 500B TDS 600B and TDS 700A Service Manual 2 5 Installation 2 6 TDS 500B TDS 600B and TDS 700A Service Manual Er aS SS Operating Instructions Screen Layout Basic Procedures How to Power On A Before doing service re
145. einstalling align and snap back on See Figure 6 7 Trim Ring When removing the trim ring grasp its back edge and vigorously flex it upward before pulling it forward Buttons Attenuator Panel Figure 6 7 Front Cover Trim Ring Menu Buttons and Attenuator Panel Removal Front Cover not Shown STOP DO NOT touch the carbon contact points on the menu buttons installed in the trim ring Also do not touch the contacts on the flex circuit exposed when you remove the trim ring TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures 4 Remove the trim ring Grasp the trim ring by its top edge and pry it up and lift it forward to snap it off of the front subpanel If servicing the menu buttons lift them out of the trim ring When reinstalling reinsert the menu buttons align the trim ring to the front subpanel and press it back on 5 Remove the attenuator panel Gently pry using your fingers the snap off snap on attenuator panel away from the front subpanel to remove it When reinstalling use your hands to press it back on 6 Reinstallation Do in reverse steps 3 5 to reinstall the attenuator panel menu buttons trim ring and the front cover following the reinstallation instruc tions found in each step A12 Front Panel NOTE This procedure includes removal and reinstallation ins
146. ement Assistance 1 6 Cursor Measure Once you have set up to make your measurements the cursor and measure features can help you quickly make those measurements Three types of cursors are provided for making parametric measurements on the displayed waveforms Horizontal bar cursors H Bar measure vertical parame ters typically volts Vertical bar cursors V Bar measure horizontal parameters typically time or frequency Paired cursors measure both amplitude and time simultaneously These are delta measurements that is measurements based on the difference between two cursors Both H Bar and V Bar cursors can also be used to make absolute measurements For the H Bars either cursor can be selected to read out its voltage with respect to any channel s ground reference level For the V Bars the cursors measure time with respect to the trigger point event of the acquisition The cursors can also control the portion of the waveform on which automatic measurements are made For time measurements units can be either seconds or hertz for 1 time With the video trigger option installed Option 05 you can measure the video line number using the vertical cursors You can measure IRE amplitude NTSC using the horizontal cursors with or without the video trigger option installed Measure can automatically extract parameters from the signal input to the Digitizing Oscilloscope Any four out of the 25 parameters available can be disp
147. er through a BNC fe male to BNC female adapter to a BNC to probe tip adapter Install the probe on CH 1 Plug the probe tip from the probe into the BNC to probe tip adapter Press VERTICAL MENU then press CH 1 Press the main menu button Coupling Then press the side menu button to toggle to 1 coupling Push SET LEVEL 50 as required to trigger the signal Adjust the triggering level of the tunnel diode pulser until a five to six division square wave appears on screen Do not advance the knob any further than required to achieve stable amplitude Make the adjustments Locate the various adjustments in Figure 5 9 Manually adjust the front corner response of the probe to best match the response of the Ref 1 waveform It is more important to match the response during the first 5 ns than during the entire first 20 ns the adjustments affect R1 Not Used R2 Figure 5 9 Locations of P6139A Probe Adjustments TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures m See Figure 5 10 to see what areas on the front corner that the various adjustments affect d Recheck Probe Bandwidth m Redo the procedure Adjust Probe High Frequency Response to check if probe now meets its bandwidth requirement m If the bandwidth requirement is met adjustment is complete Skip to step 3 m If the bandwidth requirement is not met redo this procedure increasing front corner overshoot slightly relative t
148. etained Data is maintained by small lithium thionyl chloride batteries internal to the memory ICs The amount of lithium is so small in these ICs that they can typically be safely disposed of with ordinary garbage in a sanitary landfill 2 1 12 TDS 500B TDS 600B and TDS 700A Service Manual Nominal Traits Table 1 9 Nominal Traits Mechanical Name Description Cooling Method Forced air circulation with no air filter Clearance is required Construction Material Chassis parts constructed of aluminum alloy front panel constructed of plastic laminate circuit boards constructed of glass laminate Cabinetis aluminum and is clad in Tektronix Blue vinyl material Finish Type Tektronix Blue vinyl clad aluminum cabinet Weight Standard Digitizing Oscilloscope 14 1 kg 31 105 with front cover 24 0 kg 53 Ibs when packaged for domestic shipment Rackmount Digitizing Oscilloscopes 14 1 kg 31 105 plus weight of rackmount parts for the rackmounted Digitizing Oscilloscopes Option 1R Rackmount conversion kit 2 3 kg 5 lbs parts only 3 6 kg 8 Ibs parts plus package for domestic shipping Overall Dimensions Standard Digitizing Oscilloscope Height 193 mm 7 6 in with the feet installed Width 445 mm 17 5 in with the handle Depth 434 mm 17 1 in with the front cover installed Rackmount Digitizing Oscilloscope Height 178 mm 7 0 in Width 483 mm 19 0 in Depth 558 8 mm 22 0 in TDS 500B TD
149. f the four channels to be displayed simultaneously Channels not displayed can be used to couple a triggering signal to the oscilloscope TDS 500B TDS 600B and TDS 700A Service Manual Specifications User Interface Menus Indicators General Purpose Knob GUI Use a combination of front panel buttons knobs and on screen menus to control the many functions of the oscilloscope The front panel controls are grouped according to function vertical horizontal trigger and special Set a function you adjust often such as vertical positioning or the time base setting directly by its own front panel knob Set a function you change less often such as vertical coupling or horizontal mode indirectly using a selected menu Pressing one sometimes two front panel button s such as vertical menu displays a main menu of related functions such as coupling and bandwidth at the bottom of the screen Pressing a main menu button such as coupling displays a side menu of settings for that function such as AC DC or GND ground coupling at the right side of the screen Pressing a side menu button selects a setting such as DC On screen readouts help you keep track of the settings for various functions such as vertical and horizontal scale and trigger level Some readouts use the cursors or the automatic parameter extraction feature called measure to display the results of measurements made or the status of the instru
150. front panel button that corresponds to the channel you are to confirm Set the generator output to 0 V Move the test hookup to the channel you selected b Turn on the measurement Mean for the channel Press MEASURE then press the main menu button Select Measrmnt for CHx Press the side menu button more until the menu label Mean appears in the side menu its icon is shown at the left Press the side menu button Mean Press CLEAR MENU Set the vertical scale Set the vertical SCALE to one of the settings listed in Table 4 3 that is not yet checked Start with the first setting listed Table 4 3 DC Voltage Measurement Accuracy Scale Position Set Offset Generator TDS 600B TDS 500B 700A Setting ting Divs Setting Setting Accuracy Limits Accuracy Limits 5 mV 5 1V 1 040 V 1 0329 V to 41 0471 V 41 0355 V to 41 0445 V 1V 1 040 V 1 0471 V to 1 0329 V 1 0445 V to 1 0355 V 200 mV 5 10 V 11 6 V 11 4165 V to 11 7835 V 11 5195 V to 11 6805 V 45 11 6 V 11 7835 V to 11 4165 V 11 6805 V to 11 5195 V 1V 5 10 V 18V 17 2425 V to 418 7575 V 317 7575 V to 418 2425 V 18V 18 7575 V to 17 2425 V 18 2425 V to 17 7575 V TDS 500B TDS 600B and TDS 700A Service Manual d Display the test signal Wm Press VERTICAL MENU Press main menu button Position m Use the keypad to set vertical position to 5 divisions press 5 then ENTER on the keypad The baseline level
151. fuse type and rating specified for this product To avoid electric shock do not operate this product in wet or damp conditions To avoid injury or fire hazard do not operate this product in an explosive atmosphere To avoid electric shock and erroneous readings keep probe surface clean Product Damage Precautions Use Proper Power Source Do not operate this product from a power source that applies more than the voltage specified TDS 500B TDS 600B and TDS 700A Service Manual ix General Safety Summary Provide Proper Ventilation Do Not Operate With Suspected Failures Do Not Immerse in Liquids To prevent product overheating provide proper ventilation If you suspect there is damage to this product have it inspected by qualified service personnel Clean the probe using only a damp cloth Refer to cleaning instructions Safety Terms and Symbols Terms in This Manual A A Terms on the Product These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a
152. g Bandwidth Trigger Sensitivity Sample rate External Clock and Delay Time Accuracy 20 21 Rohde amp Schwarz URV 35 with NR V Z8 power sensor Rohde amp Schwarz RVZ3 Meter Level and Power Sensor Splitter Power Frequency range 10 MHz to 400MHz Amplitude range 6 mVp p to 2 Vp Frequency range DC to 1 GHz Tracking 22 096 Checking Analog Bandwidth and Trigger Sensitivity Checking Analog Bandwidth 22 23 24 25 26 3 Generator Function Frequency range 5 MHz to 10 MHz Tektronix CFG280 Square wave transition time lt 25 ns Amplitude range 0 to 10 Vp p into 50 Q Adapter four required Male N to female BNC Tektronix 103 0045 00 Adapter Female N to male BNC Tektronix 103 0058 00 Generator 200 kHz to 250 MHz Variable ampli Tektronix SG 503 Leveled Leveled Sine Wave Sine Wave Generator 3 Medium F requency optional tude from 5 mV to 4 Vp p into 50 Q Generator Leveled Sine Wave High Frequency 250 MHz to 1 GHz Variable amplitude Tektronix SG 504 Leveled from 500 mV to 4 Vp p into 50 Sine Wave Generator with optional 6 MHz reference SG 504 Output Head Requires a TM 500 or TM 5000 Series Power Module Mainframe Checking External Clock Checking Analog Bandwidth Checking Analog Bandwidth Checking Trigger Sensitivity at low frequencies Checking Analog Bandwidth and Trigger Sensitivity at high frequencies Warning The opti
153. g DC AC or GND Input Impedance Selections 1 007500 Ranges Offset Volts Div Setting Offset Range 1 mV div 100 mV div 101 mV div 1 V div 10 V 1 01 V div 10 V div 100 V Range Position 5 divisions Range 1 MQ Sensitivity 1 mV div to 10 V div2 Range 50 O Sensitivity 1 mV div to 1 V div 1 Displayed vertically with 25 digitization levels DLs per division and 10 24 divisions dynamic range with zoom off A DL is the smallest voltage level change of the oscilloscope input that can be resolved by the 8 bit A D Converter Expressed as a voltage a DL is equal to 1 25 of a division times the volts division setting The sensitivity ranges from 1 mV div to 10 V div for 1 MQ or to 1 V div for 50 in a 1 2 5 sequence of coarse settings with Fit to Screen off Between coarse settings the sensitivity can be finely adjusted with a resolution equal to 1 of the more sensitive coarse setting For example between 50 mV div and 100 mV div the volts division can be set with 0 5 mV resolution TDS 500B TDS 600B and TDS 700A Service Manual 1 9 Nominal Traits Table 1 4 Nominal Traits Time Base System Name Range Sample R ate Range Interpolated Waveform Rate23 Range Seconds Division Record Length Selection Description TDS 684B 5 Samples sec to 5 GSamples sec on four channels simultaneously TDS 680B 5 Samples sec to 5 GSamples sec on two channels simultaneously TDS 644B 5 Samples sec to 2 5 GSamples sec
154. ger Board with option 05 page 6 32 Wm A74 DI Bus and Analog Power and Digital Power Cables page 6 29 m Fan page 6 29 m Acquisition Board page 6 39 Reinstall external modules Do in the order listed the following procedures When doing these procedures do the steps in reverse order TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures These procedures are found under Procedures for External Modules which starts on page 6 16 Front Subpanel page 6 51 Display Frame Assembly page 6 47 Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 Rear Cover and Cabinet page 6 18 Line Fuse and Line Cord page 6 17 TDS 500B TDS 600B and TDS 700A Service Manual 6 55 Removal and Installation Procedures 6 56 TDS 500B TDS 600B and TDS 700A Service Manual Troubleshooting Diagnostics This subsection contains information and procedures designed to help you isolate faulty modules in the oscilloscope If a module needs to be replaced follow the Removal and Installation Procedures located in this section The oscilloscope has two levels of internal diagnostics that focus on verifying adjusting and if need be isolating faulty modules Both levels of internal diagnostics report any bad modules and or interfaces If a bad module and or interface is found use the troubleshooting procedures in this section to determine which module needs to be replaced
155. hazard to property including the product TDS 500B TDS 600B and TDS 700A Service Manual General Safety Summary Symbols on the Product following symbols may appear on the product 4 A o DANGER Protective Ground ATTENTION Double High Voltage Earth Terminal Refer to Insulated Manual Certifications and Compliances CSA Certified Power CSA Certification includes the products and power cords appropriate for use in Cords the North America power network other power cords supplied are approved for the country of use Certifications and Refer to the specifications section for a listing of certifications and compliances Compliances that apply to this product TDS 500B TDS 600B and TDS 700A Service Manual xi General Safety Summary Xii TDS 500B TDS 600B and TDS 700A Service Manual Service Safety Summary Do Not Service Alone Disconnect Power Use Caution When Servicing the CRT Use Care When Servicing With Power On X Radiation Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary before performing any service procedures Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present To avoid electric shock disconnect the main power by means of the power cord or if provided the power switch
156. he Beaverton Oregon service center It is not updated to match current modules of the same type Again each module comes with a 90 day service warranty For More Information Contact your local Tektronix service center or sales engineer for more information on any of the repair or adjustment services just described This manual is for servicing the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes To prevent injury to yourself or damage to the oscilloscope do the following tasks before you attempt service TDS 500B TDS 600B and TDS 700A Service Manual Introduction m Besure you are a qualified service person m Read the Safety Summary found at the beginning of this manual m Read Service Strategy in this section and Supplying Operating Power in section 2 When using this manual for servicing be sure to heed all warnings cautions and notes TDS 500B TDS 600B and TDS 700A Service Manual xxi Introduction xxii TDS 500B TDS 600B and TDS 700A Service Manual Specifications Product Description This section begins with a general description of the traits of the TDS 500B TDS 600B and TDS 700A oscilloscopes Three sections follow one for each of three classes of traits nominal traits warranted characteristics and typical character istics The TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes are portable four channel instruments suitable for use in a variety of test and measurement application
157. he instrument Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init b Modify the default setup m Press VERTICAL MENU W Press the main menu button Coupling then press the side menu Q button to select 50 Q coupling Set the horizontal SCALE to 10 ns on the TDS 600B and 12 5 ns on the TDS 500B 700A Hook up the test signal source Connect the output of a medium frequency leveled sine wave generator Item 25 to CH 1 Do this through a 50 Q precision coaxial cable followed by a 10X attenua tor See Figure 4 14 Medium F requency Sine Wave Generator Digitizing Oscilloscope 10 Attenuator 50 Coaxial Cable Figure 4 14 Initial Test Hookup 2 Confirm the trigger system is within time accuracy limits for pulse glitch or pulse width triggering Horizontal Scale lt 1 us a Display the test signal Set the output of the sine wave generator for a 100 MHz five division sine wave on screen Press SET LEVEL TO 50 4 46 TDS 500 TDS 600B and TDS 700 Service Manual Performance Tests b Setthe trigger mode Press TRIGGER MENU Now press the main menu button Mode amp Holdoff then press the side menu button Normal Set upper and lower limits that ensure triggering See Figure 4 15 Press the main menu button Type then repeatedly press the same button until Pulse is highlighted i
158. head Purpose Software based Adjustments 14 Magnifier 6X Standard Tool Brightness and Focus Adjust ment 15 Photometer 0 1to 200 Footlamberts Tektronix 16 Photometer with 16503 Luminance Probe Contrast Adjustment 16 Probe 10X optional ac cessory 17 Pulser Tunnel Diode P6139A Probe Tektronix part number 067 0681 01 Tektronix P6139A Tektronix part number 067 0681 01 1 Requires a TM 500 or TM5000 Series Power Module Mainframe Adjustment Instructions The following instructions describe installing the software on your system setting up the oscilloscope for adjustment and starting the adjustment of the oscilloscope by the software Hardware Installation 5 6 Probe Adjustment Probe Adjustment 1 Install the proper GPIB card see System on page 5 2 Use the manual accompanying your GPIB card to install and configure that card 2 Configure the GPIB card a This software is compatible with cards configured for PCII and PCIIA operation The following table lists the default card settings b Ifthese settings conflict with your hardware setup see your GPIB card manual for alternate settings Ifyou have more than one GPIB card installed this adjustment software assumes the first card referenced 0 See your GPIB card manual for information on how to determine which card is your 0 card TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Proce
159. ide menu its icon is shown at the left Press the side menu button Frequency Press the side menu button more until the menu label Pk Pk appears in the side menu its icon is shown at the left Press the side menu button Pk Pk m Press CLEAR MENU m Set the generator output so the CHx Pk Pk readout equals the reference amplitude in Table 4 4 that corresponds to the vertical scale set in substep d Press the front panel button SET LEVEL 50 as necessary to trigger a stable display At full bandwidth you may also want to make small manual adjustments to the trigger level You can use the TRIGGER LEVEL knob to do this Full bandwidth varies with TDS model as is shown in Table 4 4 Measure the test signal m Set the frequency of the generator as shown on screen to the test frequency in Table 4 4 that corresponds to the vertical scale set in substep d See Figure 4 9 m Set the horizontal SCALE to the horizontal scale setting in Table 4 4 that corresponds to the vertical scale set in substep d Press SET LEVEL TO 50 as necessary to trigger the signal m Read the results at the CHx Pk Pk readout which will automatically measure the amplitude of the test signal See Figure 4 9 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Tek Run 5 00GS 5 Average Read results 3 gt C1 Pk Pk 542 Setthe generator CIF reference frequency to 999 62MH
160. identification 1 Mfr Code This indicates the code of the actual manufacturer of the part Code to name and address cross reference is located after this page 8 Mfr Part Number This indicates the actual manufacturer s or vendor s part number Abbreviations Abbreviations conform to American National Standard ANSI Y 1 1 1972 Mfr Code to Manufacturer The following table cross indexes codes names and addresses of manufacturers Cross Index vendors of components listed in the parts list 10 2 TDS 500B TDS 600B and TDS 700A Service Manual Mechanical Parts List Manufacturers Cross Index Mfr Code Manufacturer 53109 FELLER TKOIK MODERN METALS TK0488 CURRAN COIL SPRING INC TK0588 UNIVERSAL PRECISION PRODUCTS TK1163 POLYCAST INC TK1465 BEAVERTON PARTS MFG CO TK2162 DERBY MFG TK2248 WESTERN MICRO TECHNOLOGY TK2338 MATERIALS TK2432 UNION ELECTRIC TK2469 UNITREK CORPORATION TK2500 SOLECTEK ACCESSORIES CORP TK2539 ROYAL CASE CO INC TK2548 XEROX BUSINESS SERVICES DIV OF XEROX CORPORATION TK2597 CORPORATION 0 R05 TRIQUEST CORP 0 9 9 GEROME MFG CO INC 0 01 STAUFFER SUPPLY 0 05 NORTH STAR NAMEPLATE 00779 AMP INC 07416 NELSON NAME PLATE CO 1DM20 PARLEX CORPORATION LAMINATED CABLE DIV 16 54 ZYTEC CORPORATION 1J96 KAM ELECTRIC CO 11536 OPTICAL COATING LABORATORY INC 2W733 COOPER INDUSTRIES INC BELDEN DIVISION 22526 BERG ELECTRONICS INC DUPONT 24
161. igger Board page 6 32 A74 DI Bus and Analog Power and Digital Power Cables page 6 29 m Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 TDS 500B TDS 600B and TDS 700A Service Manual 6 51 Removal and Installation Procedures W Rear Cover and Cabinet page 6 18 Figure 6 24 Front Subpanel Removal Main Chassis Additional Modules Removed All 1 Remove the main chassis Since the removal of the main chassis requires the removal of virtually all modules do the procedure Disassembly for Cleaning that follows While doing Disassembly for Cleaning you will remove the front panel assembly Ignore the instructions to disassemble that assembly 2 Reinstallation See reinstallation instructions in Disassembly for Cleaning Disassembly for Cleaning This procedure is for disassembly of the Digitizing Oscilloscopes into its individual modules so they can be cleaned For the cleaning instructions see Inspection and Cleaning which begins this section 6 52 TDS 500B TDS 600 TDS 700A Service Manual Removal and Installation Procedures 1 Assemble equipment and locate modules to be removed a Have handy a screwdriver with a size T 15 Torx tip Items 1 and 2 a 20 Torx tip Item 3 a flat bladed screwdriver Item 6 11 and a pair of angle tip tweezers Item 6 11 b Familiarize yourself with the modules illustrated in figures 6 1 6 2 and 6 3 2 Rem
162. in the button label It also copies the readout to the general purpose knob readout area in the right corner of the screen Example Push Level 19 c Use the general purpose knob 20 to adjust the trigger level to the setting desired Example Turn the knob to 20 mV More About the General Purpose Knob As you ve just seen the general purpose knob can be used to extend the number of choices available to a side menu button The general purpose knob can also be assigned to control the following functions Cursor positioning m Display intensities m Delay time TDS 500B TDS 600B and TDS 700A Service Manual 2 13 Operating Instructions 2 14 Gated measurements Number of events Template generation Trigger position Holdoff Offset Variable persistence In all cases the menus are used to select the function to which the general purpose knob is assigned The following attributes apply to this knob Depending on the function it is assigned to control the general purpose knob may vary numerical readouts position objects cursors on screen or select between icon label settings that show up in side menu labels The general purpose knob has a readout area at the upper right corner of the screen See Figure 2 1 This readout always reflects the name and value of the function that the general purpose knob is currently controlling Whenever the general purpose knob assignment is changed a knob icon appears immediately t
163. ing of the DC generator m Adjust the output of the DC calibration generator until it precisely overlaps the base lower level of the stored probe compensation signal This value will be near zero volts m Record the setting of the DC generator f Press CLEAR MENU to remove the menus from the display See Figure 4 25 TDS 500 TDS 600B and TDS 700A Service Manual 4 65 Performance Tests Tek Run 250 5 5 Average OIOOIOIO io mv M 200gs Chi 7 242mV 28 Feb 1994 100mv 200 11 39 36 Figure 4 25 Measurement of Probe Compensator Amplitude g Check against limits m Subtract the value just obtained base level from that obtained previously top level m CHECK that the difference obtained is within 495 mV to 505 mV inclusive W Enter voltage difference on test record 3 Disconnect the hookup Disconnect the cable from CH 1 4 66 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Option 05 Video Trigger Checks Check Video Trigger Equipment Re quired Prerequisites PAL signal source Item 14 60 Hz sine wave generator Item 15 Pulse generator Item 16 Two 75 cables Item 17 Two 75 terminators Item 18 One BNC T connector Item 7 50 cable Item 5 50 Q terminator Item 4 See page 4 15 These pre
164. into the hole of either handle cap Push and hold to depress the handle release b While holding the handle released pull it out of the slot in the handle cap Repeat procedure to remove the handle from the other handle cap c Reverse procedure to reinstall Remove the handle caps a Insert the retaining ring pliers Item 8 into the opening created in the handle cap when you removed the handle b While using the pliers to expand the handle cap outward grasp it and snap it off TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures c Repeat procedure to remove the remaining cap as needed push the cap s back on to reinstall 5 Remove the flip stand Grasp the flip stand by both sides near where it joins each flip stand foot Now compress the flip stand until the flip stand ends clear the flip stand feet to complete the removal 6 Remove the flip stand foot or feet a Do Rear Cover and Cabinet procedure page 6 18 to gain access to inside of the cabinet b Working from inside the cabinet push the two retainers to release the flip stand foot you wish to remove and lift it away from the outside of the cabinet c Repeat procedure to remove as many of the remaining feet as needed insert the two retainers back in their slots in the cabinet and snap into place any flip stand foot removed 7 Reinstallation If any flip stand feet were removed reinstall as directed in step 6c then
165. it TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests b Modify the initialized front panel control settings m Do not adjust the vertical position of any channel during this procedure Set the horizontal SCALE to 500 ps m Press SHIFT then press ACQUIRE MENU Press the main menu button Mode and then press the side menu button Average 16 c Hook the test signal source m Connect the sine wave output of a sine wave generator item 19 optionally 25 to a 50 precision coaxial cable followed by a 50 termination and a dual input coupler See Figure 4 10 m Connect the coupler to both CH 1 and CH 2 See Figure 4 10 Sine Wave Generator Digitizing Oscilloscope Output Dual Input Coupler 50 Q Terminator Figure 4 10 Initial Test Hookup 2 Confirm all four channels are within limits for channel delay a Setup the generator Set the generator frequency to 250 MHz and the amplitude for about six divisions in CH 1 Hint As you are adjusting the generator amplitude push SET LEVEL TO 50 frequently to speed up the updating of the waveform amplitude On screen TDS 500B TDS 600B and TDS 700A Service Manual 4 39 Performance Tests 4 40 The horizontal SCALE should already be set to 500 ps On the TDS 782A 784A and 600B now set it to 200 ps On the TDS 520 540B 724A and 754A push the front panel ZOOM button
166. ite output signal from the rear of the PAL signal source labeled COMPST on the TSG 121 to the input through a 75 Q cable and a 75 terminator See Figure 4 35 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests PAL Signal Source Digitizing Oscilloscope Gre O One 75 Cable 750 Figure 4 35 Line Count Accuracy Test Hookup Press the main menu Trigger Position Press the side menu to Set to 50 Press the main menu to Horiz Pos Press the side menu to Set to 50 m Use the HORIZONTAL POSITION knob to move the falling edge of the sync pulse to two divisions to the left of center screen See Figure 4 36 TDS 500B TDS 600B and TDS 700A Service Manual 4 77 Performance Tests Tek Run 250MS s Sample eua 2 L ix Haus ii m Ph Honz i NA position Length Scale 50 5000 div Horizontal Position 1 Set to 10 Set to 50 Set to 90 Bamv 277 0 007 ES M 200ns vid Chi 1 7 COICOICOICOICO IC Figure 4 36 4 78 Line Count Accuracy Test Setup Waveform TDS 684B Shown Press CURSOR Press the main menu Function Press the side menu V Bars Using the General Purpose knob place the left cursor directly over the trigger T icon Press
167. iv 1 V div 1 01 V div 10 V div Settling Error 96 at 20 ns 100 ns 20 ms 0 196 0 296 0 296 1 The limits given are for the ambient temperature range of 0 C to 30 C Reduce the upper bandwidth frequencies by 5 MHz for the TDS 600B or by 2 5 MHz for the TDS 500B 700A for each C above 30 C TDS 600B Rise Time ns BW MHz 450 The numbers given valid 0 C to 30 C and will increase as the temperature increases due to the degradation in bandwidth Rise time is calculated from the bandwidth It is defined by the following formula TDS 500B 700A Rise Time ns 400 BW MHz Note that if you measure rise time you must take into account the rise time of the test equipment signal source etc that you use to provide the test signal That is the measured rise time RT is determined by the instrument rise time RT and the rise time of the test signal source RTgen according to the following formula RT RT gen 3 The values given are the maximum absolute difference between the value at the end of a specified time interval after the midlevel crossing of the step and the value one second after the midlevel crossing of the step expressed as a percentage of the step amplitude TDS 500B TDS 600B and TDS 700A Service Manual 1 25 Typical Characteristics Table 1 17 Typical Characteristics Triggering System Name Accuracy Trigger Level or Threshold DC Couple
168. kew CH1 to CH4 skew 3 Disconnect the hookup Disconnect the cable from the generator output at the input connectors of the channels 4 42 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Time Base System Checks These procedures check those characteristics that relate to the Main and Delayed time base system and are listed as checked under Warranted Characteristics in Specifications Check Accuracy for Equipment Re Long Term Sample Rate quired Delay Time and Delta Time Measurements One time mark generator Item 11 One 50 precision coaxial cable Item 5 Prerequisites See page 4 15 Time Mark Generator Digitizing Oscilloscope Output 50 Coaxial Cable Figure 4 12 Initial Test Hookup 1 Install the test hookup and preset the instrument controls a Hook up the test signal source Connect through a 50 Q precision coaxial cable the time mark output of a time mark generator to CH 1 Set the output of the generator for 10 ms markers b Initialize the oscilloscope W Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init c Modify the initialized front panel control settings m Set the vertical SCALE to 200 mV or 500 mV with the optional Tektronix TG 501A Time Mark Generator m Press VERTICAL MENU then press the main menu button Coupling Press the side menu butt
169. kup 4 14 Disconnect the probe from the channel input and the probe compensation terminals Remove the disk from the disk drive Do this by pushing in the tab at the bottom of the disk drive TDS 500B TDS 600B and TDS 700A Service Manual I Performance Tests This section contains a collection of procedures for checking that the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes perform as warranted The procedures are arranged in four logical groupings Signal Acquisition System Checks Time Base System Checks Triggering System Checks and Output Ports Checks They check all the characteristics that are designated as checked in Specifications The characteristics that are checked appear in boldface type under Warranted Characteristics in Specifications STOP These procedures extend the confidence level provided by the basic procedures described on page 4 5 The basic procedures should be done first then these procedures performed if desired Prerequisites The tests in this section comprise an extensive valid confirmation of perfor mance and functionality when the following requirements are met m The cabinet must be installed on the Digitizing Oscilloscope You must have performed and passed the procedures under Self Tests found on page 4 5 and those under Functional Tests found on page 4 7 A signal path compensation must have
170. l SCALE knob does 1153 pin 24 pulse low swinging between Yes No Replace the A15 Attenuator module Figure 6 35 Attenuator Acquisition Troubleshooting Procedure 6 68 TDS 500B TDS 600B TDS 700A Service Manual Troubleshooting CAUTION Only probe points specified in the procedures You can cause catastrophic damage if you attempt to probe other points TDS 500B TDS 600B and TDS 700A Service Manual 6 69 Troubleshooting Pin 100 1 T 2x T 559 oco 2o99 te jer _ st oco RI 1 ORO s 9 E k 0959 ooooooooooooo 0 09099 9 S
171. l Parts List lists all field replaceable modules by part number TDS 500B TDS 600B and TDS 700A Service Manual 6 1 Maintenance Preparation 6 2 A Preventing ESD Susceptibility to ESD Before servicing this product read the Safety Summary and Introduction at the front of the manual and the ESD information below CAUTION Static discharge can damage any semiconductor component in this oscilloscope When performing any service which requires internal access to the oscilloscope adhere to the following precautions to avoid damaging internal modules and their components due to electrostatic discharge ESD 1 Minimize handling of static sensitive modules 2 Transport and store static sensitive modules in their static protected containers or on a metal rail Label any package that contains static sensitive modules 3 Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Do service of static sensitive modules only at a static free work station 4 Nothing capable of generating or holding a static charge should be allowed on the work station surface 5 Handle circuit boards by the edges when possible 6 Do not slide the modules over any surface 7 Avoid handling modules in areas that have a floor or work surface covering capable of generating a static charge Table 6 1 lists the relative susceptibility of various classes of semiconductors S
172. l power supplies and much of the other circuitry of these Digitizing Oscilloscopes are energized regardless of the setting of the ON STBY switch TDS 500B TDS 600B and TDS 700A Service Manual 2 7 Operating Instructions Graticule and waveforms 41 Waveform reference symbols shows ground levels and waveform Sources Vertical scale horizontal scale and trigger level readouts Pop up menu gt How to Use Help How to Use the Status Menu 2 8 Position of waveform record relative to General purpose the screen and display knob readout Brief status information eere Tie IDE Level Side menu area Readouts for measurements move here when CLEAR MENU is pressed Set to TTL Set to ECL S d 1 logicc g v 7 7 20 Chi f 400mV Pulse i Video Type Source Coupling Slope Level Fuge cht DC f 400MV VL 955 Holdott EY cococ tcpie cco Main menu display area Readouts in lower graticule area move here when CLEAR MENU is pressed Figure 2 1 Map of Display Functions Push the HELP front panel button to enter help mode Front panel knobs and buttons now display information about their
173. layed to the screen The waveform parameters are measured continuously with the results updated on screen as the Digitizing Oscilloscope continues to acquire waveforms TDS 500B TDS 600B and TDS 700A Service Manual Specifications Digital Signal Processing Storage 05 An important component of the multiprocessor architecture of this Digitizing Oscilloscope is Tektronix s proprietary digital signal processor the DSP This dedicated processor supports advanced analysis of your waveforms when doing such compute intensive tasks as interpolation waveform math and signal averaging It also teams with a custom display system to deliver specialized display modes See Display later in this description Acquired waveforms may be saved in any of four nonvolatile REF reference memories or on a 3 5 inch DOS 3 3 or later compatible disk Any or all of the saved waveforms may be displayed for comparison with the waveforms being currently acquired The source and destination of waveforms to be saved may be chosen You can save any of the four channels to any REF memory or move a stored reference from one REF memory to another Reference waveforms may also be written into a REF memory location via the GPIB interface The oscilloscope is fully controllable and capable of sending and receiving waveforms over the GPIB interface IEEE Std 488 1 1987 IEEE Std 488 2 1987 standard This feature makes the instrument ideal for making au
174. le Some TDS models have two auxiliary channels called AUX 1 and AUX 2 instead of CH 3 and CH 4 References to these channels default to CH 3 and CH 4 if your oscilloscope is one of models TDS 520B TDS 620B TDS 680B TDS 724A or TDS 782A read AUX 1 and AUX 2 respectively for all references to CH 3 and CH 4 in this manual Symbols and terms related to safety appear in the Safety Summary found at the beginning of this manual Besides the symbols related to safety this manual uses the following symbols STOP The stop labels information which must be read in order to correctly do service and to avoid incorrectly using or applying service procedures D The clock icon labels procedure steps which require a pause to wait for the oscilloscope to complete some operation before you can continue TDS 500B TDS 600B and TDS 700A Service Manual Preface Various icons such as the example icon at the left are used in procedures to help identify certain readouts and menu functions on screen Related Manuals The TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes come with the following manuals TDS 500B TDS 600B amp 700A User Manual Tektronix part number 070 9719 XX contains a tutorial to quickly show you how to operate the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes and an in depth discussion of how to more completely use their features Applications are also discussed TDS 500 TDS 600B amp TDS 700
175. lightly to access the cables connected to it Disconnect those cables from CH 3 SIGNAL OUT at J1201 AUX TRIG IN at J1550 MAIN TRIG OUT at J1000 DELAYED TRIG OUT at J1001 all found on the acquisition board 4 Reinstallation Do in reverse order substeps 3 reversing each step to reinstall the rear chassis Then see the following procedures in the order listed to complete reassembly of the oscilloscope Wm A74 DI Bus and Analog Power and Digital Power Cables page 6 29 W Rear Cover and Cabinet page 6 18 6 44 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures DELAY TRIGGER to J 1001 MAIN TRIGGER to J 1000 AUXILIARY TRIGGER to J 1550 CH3 OUT to J 1201 EMI Gaskets Figure 6 20 Rear Chassis Removal TDS 500B TDS 600B and TDS 700A Service Manual 6 45 Removal and Installation Procedures Procedures for Inner Chassis Modules A16 Low Voltage Power 6 46 Supply You should have completed the Access Procedure page 6 15 before doing any of the procedures for the Inner Chassis modules The procedures are presented in the following order A16 Low Voltage Power Supply A30 Display Assembly and Supply Fuse Front Subpanel Main Chassis 1 Assemble equipment and locate modules to be removed Have handy a screwdriver with a size T 15 Torx tip Items 1 2 Locate the modules to be removed in the locator diagram Inner Chassis Modules
176. ll modules are listed in Mechanical Parts List To isolate a failure to a module use the fault isolation procedures found in Section 6 Maintenance Information To remove and replace any failed module follow the instructions in Removal and Installation Procedures also found in Section 6 Tektronix provides service to cover repair under warranty as well as other services that may provide a cost effective answer to your service needs Whether providing warranty repair service or any of the other services listed below Tektronix service technicians trained on Tektronix products are best equipped to service your TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes Tektronix technicians are appraised of the latest information on improvements to the product as well as the latest new options to the product Tektronix warrants this product for three years from date of purchase excluding probes for which the warranty is one year The warranty appears after the title page and copyright page in this manual Tektronix technicians provide warranty service at most Tektronix service locations worldwide Your Tektronix product catalog lists all service locations worldwide The following services may be purchased to tailor repair and or calibration of your TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes to fit your requirements TDS 500B TDS 600B and TDS 700A Service Manual xix Introduction Self Service Before You Begin XX
177. lloscopes that appear to have been dropped or otherwise abused should be checked thoroughly to verify correct operation and performance Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope TDS 500B TDS 600B and TDS 700A Service Manual Maintenance Table 6 2 External Inspection Check List Item Inspect For Repair Action Cabinet front panel and Cracks scratches deformations Repair or replace defective cover damaged hardware or gaskets module Front panel knobs Missing damaged or loose Repair or replace missing or knobs defective knobs Connectors Broken shells cracked insulation Repair or replace defective and deformed contacts Dirt in modules Clear or wash out dirt connectors Carrying handle bail Correct operation Repair or replace defective cabinet feet module Accessories Missing items or parts of items Repair or replace damaged or bent pins broken or frayed missing items frayed cables and cables and damaged connectors defective modules Cleaning Procedure Exterior To clean the oscilloscope exterior do the following steps 1 Remove loose dust on the outside of the oscilloscope with a lint free cloth 2 Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not use abrasive cleaners 3 Clean the light filter protecting the monitor screen with a lint free c
178. loscope displays a passed status message and a prompt to press CLEAR MENU to continue If it fails the oscilloscope displays a diagnostic log that identifies the area s that failed and a prompt to press CLEAR MENU to TDS 500B TDS 600B and TDS 700A Service Manual 2 3 Installation Power Off A continue See Section 6 Maintenance for information on diagnostics and fault isolation CAUTION DO NOT power off the oscilloscope when either running a signal path compensation or when doing any of the adjustments described in Section 5 Adjustment Procedures To do so might result in the loss of internally stored adjustment constants In general do not power off the instrument when doing operations that affect the data types listed in Table 1 1 Wait for the instrument to finish the operation when doing adjustments saving waveforms or saving setups Improper power off or unexpected loss of power to the oscilloscope can result in the following corruptions of nonvolatile RAM NVRAM The following table describes the messages displayed when power is restored after an abnormal power off Table 2 3 Effects of Corrupted Data Corrupted Data Type Results Adjustment Constants Signal Path Compensation A signal path compensation is required Voltage Reference A voltage reference adjustment is required Section 5 Frequency Response A frequency response adjustment is required Section 5 Error Log Errors logged are lost R
179. loth dampened with either isopropyl alcohol or preferably a gentle general purpose detergent and water solution CAUTION To prevent getting moisture inside the oscilloscope during external cleaning use only enough liquid to dampen the cloth or applicator Inspection Interior To access the inside of the oscilloscope for inspection and cleaning refer to the Removal and Installation Procedures in this section Inspect the internal portions of the oscilloscope for damage and wear using Table 6 3 as a guide Defects found should be repaired immediately If any electrical module is replaced check Table 5 2 in Section 5 to see if it is necessary to adjust the oscilloscope CAUTION To prevent damage from electrical arcing ensure that circuit boards and components are dry before applying power to the oscilloscope TDS 500B TDS 600B and TDS 700A Service Manual 6 5 Maintenance 6 6 Table 6 3 Internal Inspection Check List Item Circuit boards Inspect For Loose broken or corroded solder connections Burned circuit boards Burned broken or cracked circuit run plating Repair Action Remove failed module and replace with a fresh module Resistors Burned cracked broken blis Remove failed module and tered condition replace with a fresh module Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Capacitors Damaged or leaking cases Remove da
180. maged module and Corroded solder on leads or replace with a fresh module from terminals the factory Semiconductors Loosely inserted in sockets Firmly seatloose semiconduc Wiring and cables Chassis Distorted pins Loose plugs or connectors Burned broken or frayed wiring Dents deformations and dam aged hardware tors Remove devices that have distorted pins Carefully straight en pins as required to fit the socket using long nose pliers and reinsert firmly Ensure that straightening action does not crack pins causing them to break off Firmly seat connectors Repair or replace modules with defective wires or cables Straighten repair or replace defective hardware Cleaning Procedure Interior To clean the oscilloscope interior do the following steps 1 Blow off dust with dry low pressure deionized air approximately 9 psi 2 Remove any remaining dust with a lint free cloth dampened in isopropyl alcohol 75 solution and rinse with warm deionized water cotton tipped applicator is useful for cleaning in narrow spaces and on circuit boards STOP If after doing steps I and 2 a module is clean upon inspection skip the remaining steps 3 Ifsteps 1 and 2 do not remove all the dust or dirt the oscilloscope may be spray washed using a solution of 75 isopropyl alcohol by doing steps 4 through 8 TDS 500B TDS 600B and TDS 700A Service Manual Maintenance 4
181. ment Assign the general purpose knob to adjust a selected parameter function More quickly change parameters by toggling the SHIFT button Use the same method as for selecting a function except the final side menu selection assigns the general purpose knob to adjust some function such as the position of measure ment cursors on screen or the setting for a channel fine gain The user interface also makes use of a GUI or Graphical User Interface to make setting functions and interpreting the display more intuitive Some menus and status are displayed using iconic representations of function settings such as those shown here for full 250 MHz and 20 MHz bandwidth Such icons allow you to more readily determine status or the available settings Signal Acquisition System The signal acquisition system provides four full featured vertical channels with calibrated vertical scale factors from 1 mV to 10 V per division channels be acquired simultaneously Each of the full featured channels can be displayed vertically positioned and offset can have their bandwidth limited 250 MHz or 20 and their vertical coupling specified Fine gain can also be adjusted TDS 500B TDS 600B and TDS 700A Service Manual Specifications Besides these channels up to three math waveforms and four reference waveforms are available for display A math waveform results when you specify dual waveform operations such as add on any two cha
182. ment at all depending on the module replaced See Table 5 2 Table 5 2 Adjustments Required for Module Replaced Module Replaced Adjustment Required Acquisition Board Complete Adjustment FrontPanel Assembly None Required Low Voltage Power Supply Complete Adjustment Processor Board None Required Display Assembly Display Adjustment Only 1 Optionally you may first do the complete performance verification all procedures in Chapter 4 If all procedures are passed you can skip the complete adjustment if any procedures fail you must do a complete adjustment Some adjustments depend on successful prior completion of other adjustments For example all the CATS tests associated with the Voltage Reference Adjust ment class must be passed before any other adjustments can be successfully completed Table 5 3 lists the adjustments and their dependencies Table 5 3 Adjustments and Dependencies Class of Adjustment Prior Completion Requirements Voltage Reference Adjustment None Frequency Response Adjustment Voltage Reference SPC and all tests Pulse Trigger Adjustment Voltage Reference SPC and all tests P6139A Probe Adjustment Voltage Reference and Frequency Response SPC and all tests Display Adjustment None TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures Equipment Required Table 5 4 lists the test equipment required to adjust the TDS 500B TDS 600B and TDS 700A Digitizing Oscillosco
183. more until the side menu label DC Aux appears then press DC Aux m Press SET LEVEL TO 50 CHECK that a stable trigger is obtained for the test waveform on both the positive and negative slopes Press the main menu button Slope then use the side menu to switch between trigger slopes Use the TRIGGER LEVEL knob to stabilize the trigger if required m Enter the pass fail result on the test record TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Leave the Main trigger system triggered on the positive slope of the waveform before proceeding to the next check Press the main menu button Source then press the side menu button more until CH 1 appears Press CH 1 4 Confirm that the Main and Delayed trigger systems are within sensitivity limits full bandwidth a Hook the test signal source Disconnect the hookup installed in step 1 Connect the signal output of a high frequency sine wave generator item 19 or optionally item 26 to CH 1 b Set the Main and Delayed Horizontal Scales Set the horizontal SCALE to 500 ps for the M Main time base Press HORIZONTAL MENU Now press the main menu button Time base then press the side menu button Delayed Triggerable Press the side menu button Delayed Only Set the horizontal SCALE to 500 ps for the D Delayed time base Press the side menu button Main Only c Display the test signal Set the generator frequency to full bandwidth as follows
184. moving a module for service begin by doing the procedure Access Procedure page 6 15 By following the instructions in that procedure you remove the module to be serviced while removing the minimum number of additional modules The procedures are described in the order in which they appear in this section In addition you can look up any procedure for removal and reinstallation of any module in the Table of Contents of this manual m The Access Procedure on page 6 15 first directs you to the procedure s if any that are required to access the module to be serviced then it directs you to the procedure to remove that module m Procedures for External Modules on page 6 16 are procedures for removing modules the removal of which do not require internal access to the oscillo scope m Procedures for Outer Chassis Modules on page 6 29 are procedures for removing modules the removal of which require access internal to the instrument but external to the chassis Wm Procedures for Inner Chassis Modules on page 6 46 are procedures for removing modules the removal of which require access internal to the instrument and internal to the chassis m Disassembly for Cleaning on page 6 52 is a procedure based on the removal procedures just described that removes all modules for cleaning Instructions for cleaning are found in nspection and Cleaning which begins this section NOTE Read the cleaning procedure before disassembling the oscill
185. n the main menu is within 9 863 V to 10 137 V inclusive for the TDS 600B or is within 9 9393 V to 10 1147 V inclusive for the TDS 500 700 W Enter voltage on test record UM Press the main menu button Slope then press the side menu button for negative slope See icon at left Repeat substep b m CHECK that the Level readout in the main menu is within 9 863 V to 10 137 V inclusive for the TDS 600B or is within 9 9393 V to 10 1147 V inclusive for the TDS 500 700 Enter voltage on test record Tek Run 100 5 5 Sample Edge Slope Set vertical position to 3 divs Set vertical offset to 10 volts 1 bs Source Coupling Level ode Type amp rupes chi DC 9 960 2 3 Set DC calibration Read results generator to equal offset 10 V Figure 4 17 Measurement of Trigger Level Accuracy 3 Confirm Delayed trigger system is within limits for Trigger level Threshold accuracy a Select the Delayed time base TDS 500B TDS 600B and TDS 700A Service Manual 4 51 Performance Tests Press HORIZONTAL MENU Press the main menu button Time Base Press the side menu buttons Delayed Only and Delayed Trigger able Set D delayed horizontal SCALE to 500 us b Select the Delayed trigger system
186. n the menu that pops up Press the main menu button Class then repeatedly press the same button until Width is highlighted in the menu that pops up Press the main menu button Trig When then press the side menu button Within Limits Press the side menu button Upper Limit Use the keyboard to set the upper limit to 10 ns press 10 then SHIFT then n and ENTER Press the side menu button Lower Limit Use the keypad to set the lower limit to 2 ns d Change limits until triggering stops Press SET LEVEL TO 50 While doing the following subparts monitor the display it will stop acquiring and the front panel light TRIG it will extinguish to determine when triggering is lost Press the side menu button Lower Limit Use the general purpose knob to increase the Lower Limit readout until triggering is lost CHECK that the Lower Limit readout after the oscilloscope loses triggering is within 3 5 ns to 6 5 ns inclusive Enter time on test record Use the keypad to return the Lower Limit to 2 ns and reestablish triggering Press the side menu button Upper Limit then use the general purpose knob to slowly decrease the Upper Limit readout until triggering is lost CHECK that the Upper Limit readout after the oscilloscope loses triggering is within 3 5 ns to 6 5 ns inclusive Enter time on test record TDS 500B TDS 600B and TDS 700A Service Manual 4 47 Performance Tests 4 48
187. nd with option 1M 75000 100000 130000 250000 1 or 2 channels or 500000 1 channel samples 1 The range of real time rates expressed in samples second at which a digitizer samples signals at its inputs and stores the samples in memory to produce a record of time sequential samples The range of waveform rates for interpolated or equivalent time on the TDS 700A waveform records 3 The Waveform Rate WR is the equivalent sample rate of a waveform record For a waveform record acquired by real time sampling of a single acquisition the waveform rate is the same as the real time sample rate for a waveform created by interpolation of real time samples from a single acquisition or on applicable products the equivalent time sampling of multiple acquisitions the waveform rate created is faster than the real time sample rate For all these cases the waveform rate is 1 Waveform Interval for the waveform record where the waveform interval WI is the time between the samples in the waveform record 1 10 TDS 500B TDS 600B and TDS 700A Service Manual Nominal Traits Table 1 5 Nominal Traits Triggering System Name Description Range Delayed Trigger Time Delay 16 to 2505 Range Events Delay TDS 600B 2 to 10 000 000 TDS 500B 700A 1 to 10 000 000 Range Time for Pulse Glitch Pulse Width 1 ns 015 Time Qualified Runt Timeout or Slew Rate Trigger Delta Time Ranges Setup and Hold for Min to max TimeS et
188. nd Analog Power and Digital Power Cables and A23 SerPar Board that precede this procedure to remove those items It is not necessary to pull the A23 board assembly out entirely nor is it necessary to remove the cable connector from the A23 SerPar board to the A11 Processor Display board 2 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its front is facing you 3 Remove the A29 Video Trigger board Figure 6 14 shows the A29 Video Trigger board option 05 installed a Remove or pull loose the A27 Connector board see number 3 on Figure 6 15 b Slide back and lift up the Video Trigger circuit board see Figure 6 15 TDS 500B TDS 600B and TDS 700A Service Manual 6 33 Removal and Installation Procedures Coax Cable Figure 6 14 Circuit Board Installed TDS 500B TDS 600B and TDS 700A Service Manual 6 34 Removal and Installation Procedures Coax Cable g 2000099 amp 9 2020 To 1500 Figure 6 15 Circuit Board Removal 4 Reinstallation a Do in reverse order steps a through e Reverse the removal instructions of each step to reinstall the A29 Video Trigger Board NOTE For the TDS 600B be sure to arrange the coax cable as shown in Figures 6 14 and 6 15 Failure to do this may impair performance Also when plugging in the digital bus boards 1
189. nd Supply Fuse removed and replaced as such They are listed as a single module in the Replaceable Parts List 1 Assemble equipment and locate modules to be removed Have handy a screwdriver with a size T 15 Torx tip Items 1 and 2 Locate the modules to be removed in the locator diagram Inner Chassis Modules Figure 6 2 page 6 13 TDS 500B TDS 600B and TDS 700A Service Manual 6 47 Removal and Installation Procedures 6 48 2 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its rear is facing you 3 Remove the high voltage fuse If you are servicing this fuse remove the fuse from its fuse holder Reverse the procedure to reinstall WARNING Display tube handling Use care when handling a display tube If you break a display tube it may implode scattering glass fragments with high velocity and possibly injuring you Wear protective clothing including safety glasses preferably a full face shield Avoiding striking the display tube with or against any object Display tube storage Store the display tube face down in a protected location placing it on a soft nonabrasive surface to prevent scratching the face plate 4 Remove the display tube a Take the precautions outlined in the warning above Reference Fig ure 6 22 while doing the following substeps b Unplug the display tube connector from the back of the display tube and the display tube yoke connector from th
190. ngle Graticule 401 x 501 pixels 8 x10 divisions where divisions are 1 cm by 1 cm Waveform Display Levels Colors TDS 520B 540B 620B and 680B Sixteen levels in infinite persistence or variable persistence display TDS 644B 684B 724A 754A 782A and 784A Sixteen colors in infinite persistence or variable persistence display Table 1 7 Nominal Traits GPIB Interface Output Ports and Power Fuse Name Description Interface GPIB GPIB interface complies with IEEE Std 488 1987 Interface RS 232 RS 232 interface complies with EIA TIA 574 talk only Optional on the TDS 520B and 540B Interface Centronics 1 interface complies with Centronics interface standard C332 44 Feb 1977 REV Interface Video VGA video output with levels that comply with EIA RS 343A standard DB 15 connector Logic Polarity for Main and Delayed Negative TRUE High to low transition indicates the trigger occurred Trigger Outputs Fuse Rating Either of two fuses may be used a 0 25 x 1 25 UL 198 6 6A FAST 250 V ora 5 mm x 20 mm 127 5 T 250 V Each fuse type requires its own fuse cap 1 Table 1 8 Nominal Traits Data Handling and Reliability Name Description Time Data Retention Nonvolatile Memory Battery life gt 5 years 2 Floppy disk 3 5 inch 720 K or 1 44 Mbyte DOS 3 3 or later compatible optional on the TDS 520B and 540B 1 The times that reference waveforms stored setups and calibration constants are r
191. nnels A reference waveform results when you save a waveform in a reference memory Horizontal System There are three horizontal display modes main only main intensified and delayed only You can select among various horizontal record length settings A feature called Fit to Screen allows you to view entire waveform records within the 10 division screen area Waveforms are compressed to fit on the screen See Table 1 2 Both the delayed only display and the intensified zone on the main intensified display may be delayed by time with respect to the main trigger Both can be set to display immediately after the delay delayed runs after main mode The delayed display can also be set to display at the first valid trigger after the delay delayed triggerable modes The delayed display or the intensified zone may also be delayed by a selected number of events In this case the events source is the delayed trigger source The delayed trigger can also be set to occur after a number of events plus an amount of time TDS 500B TDS 600B and TDS 700A Service Manual 1 3 Specifications Table 1 2 Record Length and Divisions per Record vs TDS Model Divisions per Record Record Models Length FTS Off FTS On All TDS 500B TDS600B amp TDS 700A 500 10 divs 10 divs 4 models all channels 1000 20 divs 10 divs Option 1M equipped or not 2500 10 divs 5000 10 divs 15000 300 divs 15 divs TDS 500B amp TDS 700A all
192. nstall the test hookup and preset the instrument controls a Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init b Modify the initialized front panel control settings Set the horizontal SCALE for the M main time base to 20 ns on the TDS 600B or 25 ns on the TDS 500 700 Press HORIZONTAL then press the main menu button Time Base Press the side menu button Delayed Only then press the side menu button Delayed Triggerable Set the horizontal SCALE for the D delayed time base to 20 ns on the TDS 600B or 25 ns on the TDS 500 700 then press the side menu button Main Only Press TRIGGER MENU then press the main menu button Mode amp Holdoff Press the side menu button Normal Press VERTICAL MENU then press the main menu button Coupling Press the side menu button to select the 50 setting Press SHIFT then press ACQUIRE MENU Press the main menu button Mode then press the side menu button Average 16 c Hook up the test signal source Connect the signal output of a medium frequency sine wave generator item 19 or optionally item 25 to a BNC T connector Connect one output of the T connector to CH 1 through a 50 9 precision coaxial cable Connect the other output of the T connector to the AUX TRIG INPUT at the rear panel See Figure 4 18 TDS 500B TDS 600B and TDS 700A Service Manual 4 53
193. nt Re One probe such as the P6243 P6245 or P6139A quise One 720 K or 1 44 Mbyte 3 5 inch DOS compatible disk You can use a disk of your own or you can use the Programming Examples Software 3 5 inch disk Tektronix part number 063 1134 XX contained in the TDS Family Programmer Manual Tektronix part number 070 9556 Prerequisites None 1 Install the test hookup and preset the oscilloscope controls a Hook up the signal source Install the probe on CH 1 Connect the probe to PROBE COMPENSATION SIGNAL on the front panel connect the probe ground to PROBE COMPENSATION GND See Figure 4 3 on page 4 8 b Insert the test disk Insert the disk in the disk drive to the left of the monitor Position the disk so the metal shutter faces the drive Position the disk so the stamped arrow is on the top right side In other words place the angled corner in the front bottom location Push the disk into the drive until it goes all the way in and clicks into place c Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init d Modify default settings m Set the vertical SCALE to 200 mV m Set the horizontal SCALE for the M main time base to 200 us Notice the waveform on the display now shows two cycles instead of five W Press CLEAR MENU to remove the menus from the screen TDS 500B TDS 600B and T
194. nt panel control settings Set vertical SCALE to 5 mV Push SET LEVEL 50 as required to trigger the signal Press VERTICAL MENU Then press the main menu button Coupling Press the side menu button to toggle to 50 Q coupling Press CLEAR MENU 2 Adjust the Probe a Display and store the reference signal Set the high amplitude output of the generator to 60 V at the input to the tunnel diode pulser Set the Period repetition rate to 10 kHz Advance the triggering level of the tunnel diode pulser until a five to six division square wave appears on screen Do not advance the knob any further than required to achieve stable amplitude Use the vertical POSITION to center the displayed waveform on screen Press SHIFT then press ACQUIRE MENU Press the main menu button Mode Then press the side menu button Average 16 Push SET LEVEL 50 as required to trigger the signal Advance the horizontal SCALE to 5 ns Press HORIZONTAL MENU Press the main menu button Trigger Position press the side menu button Set to 20 Press SAVE WAVEFORM Press the main menu button Save Waveform Then press the side menu button To Ref 1 Press MORE Then push the main menu button Ref 1 TDS 500B TDS 600B and TDS 700A Service Manual 5 17 Adjustment Procedures 5 18 Display the test signal Disconnect the tunnel diode pulser at CH 1 and remove the 10X attenuator Connect the output of the tunnel diode puls
195. ntive maintenance consists of visually inspecting and cleaning the oscilloscope and using general care when operating it How often to do maintenance depends on the severity of the environment in which the oscilloscope is used A proper time to perform preventive maintenance is just before oscilloscope adjustment The cabinet helps keep dust out of the oscilloscope and should normally be in place when operating the oscilloscope The oscilloscope s front cover protects the front panel and display from dust and damage Install it when storing or transporting the oscilloscope Inspect and clean the oscilloscope as often as operating conditions require The collection of dirt on components inside can cause them to overheat and break down Dirt acts as an insulating blanket preventing efficient heat dissipation Dirt also provides an electrical conduction path that could cause an oscilloscope failure especially under high humidity conditions CAUTION Avoid the use of chemical cleaning agents which might damage the plastics used in this oscilloscope Use only deionized water when cleaning the menu buttons or front panel buttons Use a 75 isopropyl alcohol solution as a cleaner and rinse with deionized water Before using any other type of cleaner consult your Tektronix Service Center or representative Inspection Exterior Inspect the outside of the oscilloscope for damage wear and missing parts using Table 6 2 as a guide Osci
196. nu Limit Test to ON p Toggle the side menu Ring Bell if Condition Met to ON TDS 500B TDS 600B and TDS 700A Service Manual 4 69 Performance Tests q Press the main menu Mode r Press the side menu Envelope s Usethe keypad to set envelope to use 100 acquisitions press 100 then ENTER t Press the main menu Stop After button u Press the side menu Single Acquisition Sequence v Confirm that the oscilloscope successfully makes 100 acquisitions If not successful the oscilloscope bell will ring When the word Run in the top left corner of the display changes to STOP the test is complete See Figure 4 28 B single Seq 125MS s Stop After ME o RUN STOP Stop shows test complete EE Euro only Single ES Acquisition Sequence Limit Test Condition Met fi 2s2mv w 1 M 200ns VidChi i 7 Refl _ 282mv 20008 Mode Limit Test Limit Test E eate t limit Test Envelope Setup Sources Template ICOICOICOICOICOICOICO Figure 4 28 Jitter Test When Completed TDS 684B Shown w Press the main menu Limit Test Setup x Toggle the side menu Ring Bell if Condition Met to OFF y Toggle the side menu Limit Test to OFF 4 Check Triggered Signal Range Set up oscilloscope for Triggered Signal Test a Press MORE 4 70 TDS 500B TDS 600B and TDS 700A Service Man
197. o 100 limits You can specify a mode and manner to acquire and process signals that matches your measurement requirements m Select the mode for interpolation linear or sin x x This can increase the apparent sample rate on the waveform when the maximum real time rate is exceeded Use sample envelope average and peak detect modes to acquire signals With the TDS 500 700 also use high resolution mode Set the acquisition to stop after a single acquisition or sequence of acquisi tions if acquiring in average or envelope modes or after a limit condition has been met Select channel sources for compliance with limit tests You can direct the TDS to signal you or generate hard copy output either to a printer or to a floppy disk file based on the results Also you can create templates for use in limit tests TDS 500B TDS 600B and TDS 700A Service Manual 1 5 Specifications On Board User Assistance Help Autoset Help and autoset can assist you in setting up the Digitizing Oscilloscope to make your measurements Help displays operational information about any front panel control When help mode is in effect manipulating any front panel control causes the Digitizing Oscilloscope to display information about that control When help is first invoked an introduction to help is displayed on screen Autoset automatically sets up the Digitizing Oscilloscope for a viewable display based on the input signal Measur
198. o the left of the general purpose knob readout to notify you of the assignment change The icon is removed as soon as you use the general purpose knob to change the value of the function it is assigned to To assign the general purpose knob to control a function display the menu containing the function then select the function Note that not all functions can be controlled by the general purpose knob Whenever the menu is removed the general purpose knob is not assigned and doesn t control any function An exception is the cursor function If cursors are turned on removing the menu leaves the knob assigned to control the cursors until reassigned by selecting another menu and function that uses the knob When the SHIFT button is lighted the general purpose knob becomes a coarse adjustment When the SHIFT button is not lighted the general purpose knob becomes a fine adjustment The general purpose knob also has a SELECT button This button is used to toggle the knob between the control of either of the two cursors displayed when H bar or V bar cursors are turned on in the cursor menu TDS 500B TDS 600B and TDS 700A Service Manual Operating Instructions Display and Utility Menus Using the techniques described for using menus you can access and change functions in the display menu and utilities menu In the Display menu you can set the following functions m Color waveforms readouts graticule Intensity waveforms read
199. o the stored waveform m Repeat this step d until the bandwidth requirement is met 20 ns R1 10 ns R2 e ns C1 Adjust R1 for best overall match 2 Adjust R2 and C1 for best match between front corners 3 Repeat the first two steps as needed due to interaction between adjustments Figure 5 10 Adjustments versus Front Corner Response 3 Disconnect the hookup Unplug the probe from the BNC to probe tip adapter Reverse the instructions in Figure 5 5 page 5 13 to reinstall the retractable probe tip TDS 500B TDS 600B and TDS 700A Service Manual 5 19 Adjustment Procedures Display Assembly Adjustment STOP It is not necessary to do this procedure to perform a complete adjustment Only use this procedure to adjust the display assembly if it has been repaired or if brightness and contrast have become unsatisfactory Brightness and Contrast Equipment Re One 6X magnifier Item 14 TDS quie 16 Photometer with a 6503 Luminance Probe Item 15 680B Monochrome Only 1 Access the inside of the oscilloscope See Removal and Installation Procedures in Section 6 to remove the cabinet 2 Adjust the display brightness a Display the Composite test pattern Leave the oscilloscope powered off m Set the DIP switch located near the front of the All DRAM Processor Display as follows Switch No Open Closed m Power on the oscilloscope m Press SHIFT then
200. oard mount a flat bladed screwdriver Item 5 TDS 500B TDS 600B and TDS 700A Service Manual 6 37 Removal and Installation Procedures 6 38 2 3 4 b Locate the modules to be removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 Do the procedures A74 D1 Bus and Analog Power and Digital Power Cables page 6 29 23 SerPar Board page 6 31 if option 05 is installed A29 Video Trigger Board page 6 32 and A11 Processor Dis play Board page 6 36 to remove those modules Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its front is facing you Remove the top cover Remove the 12 screws securing the top cover to the main chassis then slide it back until its front edge clears the retainers in the front subpanel Lift the top cover away to complete removal Remove the board mount s From the top side of the top cover use the flat bladed screwdriver to pry up the retainer lug until it clears the slot in the front cover While holding the lug clear of the slot push the mount towards the rear until it releases When reinstalling be sure to align the lug properly and be sure it snaps into its slot Figure 6 17 Board Bracket Removal 5 Reinstallation a Do in reverse order steps 3 and 4 reversing the procedure outlined in each step to reinstall the assembly Then see the following procedures in the order listed to complete reassem
201. ollow List of tools required to remove all modules Three module locator diagrams for finding the External Modules see Figure 6 1 Outer Chassis Modules see Figure 6 2 and Inner Chassis Modules see Figure 6 3 in this oscilloscope Procedures for removal and reinstallation of the electrical and mechanical modules A disassembly procedure for removal of all the major modules from the oscilloscope at one time and for reassembly of those modules into the oscilloscope Such a complete disassembly is normally only done when completely cleaning the oscilloscope Instructions for doing the actual cleaning are found under Inspection and Cleaning at the beginning of this section WARNING Before doing any procedure in this subsection disconnect the power cord from the line voltage source Failure to do so could cause serious injury or death Section 10 lists all modules TDS 500B TDS 600B and TDS 700A Service Manual 6 9 Removal and Installation Procedures General Instructions Summary of Procedures 6 10 STOP READ THESE GENERAL INSTRUCTIONS BEFORE REMOVING A MODULE First read over the Summary of Procedures that follows to understand how the procedures are grouped Then read Equipment Required for a list of the tools needed to remove and install modules in this oscilloscope If you are disassembling this oscilloscope for cleaning go to the procedure Disassembly for Cleaning on page 6 52 If you are re
202. on Q to toggle it to the 50 O setting m Press SET LEVEL TO 50 TDS 500B TDS 600B and TDS 700A Service Manual 4 43 Performance Tests m Use the vertical POSITION knob to center the test signal on screen m Set the horizontal SCALE of the Main time base to 1 ms m Press TRIGGER MENU then press the main menu button Mode amp Holdoff Press the side menu button Normal 2 Confirm Main and Delayed time bases are within limits for accuracies a Display the test signal m Align the trigger T to the center vertical graticule line by adjusting the horizontal POSITION See Figure 4 13 on page 4 45 m Press HORIZONTAL MENU m Set horizontal modes To do this press the main menu button Time Base Press the side menu buttons Delayed Only and Delayed Runs After Main See Figure 4 13 b Measure the test signal m Set the horizontal SCALE of the D delayed time base to 500 ns for the TDS 600B or to 100 ns for the TDS 500B 700A m Set delayed time to 10 ms Do this on the keypad by pressing 10 then SHIFT then m followed by ENTER c Check long term sample rate and delay time accuracies against limits m CHECK that the rising edge of the marker crosses the center horizontal graticule line at a point within either 2 0 divisions for the TDS 600B or 2 5 divisions for the TDS 500B 700A of center graticule See Figure 4 13 Enter number of divisions on test record 4 44 TDS 500B TDS 600B and TDS 700A Service Manual
203. onal P6243 and P6245 probes that may be used with this oscilloscope provide an extremely low loading capacitance lt 1 pF to ensure the best possible signal reproduction These probes should not be used to measure signals exceeding 8 V or errors in signal measurement will be observed Above 40 V damage to the probe may result To make measurements beyond 8 V use either the P6139A probe good to 500 V or refer to the catalog for a recommended probe You can replace items 19 20 or 21 with a Tektronix SG503 item 25 or SG504 item 26 if available TDS 500B TDS 600B and TDS 700A Service Manual 4 17 Performance Tests 4 18 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests TDS 600B Test Record Photocopy this and the next three pages and use them to record the performance test results for your TDS 600B TDS 600B Test Record Instrument Serial Number Temperature Date of Calibration TDS 600B Performance Test Certificate Number RH 96 Technician Minimum Incoming Outgoing Maximum Offset Accuracy CH1 Offset 1 mV 145 mV 101 mV 69 1 mV H 01V 691 mV CH2 Offset 1 mV 1 45 mV 101 mV 69 1 mV 1 01V 691 mV CH3 or AX1 1 mV 1 45 mV Offset 101 mV 69 1 mV 1 01V 691 mV CH4 or AX2 1 mV 1 45 mV Offset 101 mV 69 1 mV 1 01 V 691 mV DC Voltage Measurement Accuracy Averaged CH1 5 mV Vert scale setting 1 0329 V 1 0471 V 5 Div position setting
204. ont Panel S Assembly Ni S S z lt eA o d Sz Ua Ground Figure 6 8 A12 Front Panel Assembly Removal 4 Further disassembly of front panel assembly If the front panel or the front panel buttons are to be serviced do the following substeps a Remove the front panel control knobs from the front panel assembly using the method described in Front Panel Knobs on page 6 16 b Remove the eight screws mounting the front panel board to the front panel TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures c Now hand disassemble the front panel assembly components using Figure 6 9 as a guide Reverse procedure to reassemble again using Figure 6 9 as a guide 9 Figure 6 9 Disassembly of Front Panel Assembly 5 Reinstallation If the front panel assembly was further disassembled step 4 then reverse substeps 4a 4c to reassemble using Figure 6 9 as a guide Then do step 3 reversing the procedure outlined in each substep Last reinstall the trim ring and if desired the front cover referring to the procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 Display Frame Assembly 1 Assemble equipment and locate modules to be removed Have handy screwdriver with a size T 15 Torx Items 1 and 2 Locate the modules to be removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 TDS 500B TDS
205. or the current vertical scale setting W Enter voltage on test record m Repeat substeps b through f until all vertical scale settings listed in Table 4 2 are checked for the channel under test 4 28 TDS 500B TDS 600B TDS 700A Service Manual Performance Tests Run 100k8 s Average Read the measurement 2 results Align the active cursor 1 over the waveform oom BSS OV 23 Feb 1994 09 36 18 Figure 4 4 Measurement of DC Offset Accuracy at Zero Setting 6 Test all channels Repeat substeps a through f for all input channels 3 Disconnect the hookup No hookup was required Check DC Voltage Measurement Accuracy WARNING The generator is capable of outputting dangerous voltages Be sure to set the DC calibration generator to 0 volts before connecting disconnecting and or moving the test hookup during the performance of this procedure Two dual banana connectors Item 6 One BNC T connector Item 7 Equipment Re quired One DC calibration generator Item 9 Two precision coaxial cables Item 5 Prerequisites The oscilloscope must meet the prerequisites listed on page 4 15 See Input Channels vs Model on page 4 2 TDS 500B TDS 600B and TDS 700A Service Manual 4 29 Performance Tests 1 Install the test hookup and preset the instrument
206. oscope for cleaning Equipment Required Most modules in this oscilloscope can be removed with a screwdriver handle mounted with a size T 15 Torx 9 screwdriver tip Use this TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures tool whenever a procedure step instructs you to remove or install a screw unless a different size screwdriver is specified in that step All equipment required to remove and reinstall each module is listed in the first step of its procedure Table 6 4 Tools Required for Module Removal Item Tektronix Part No Description Number 1 Screwdriver handle Accepts Torx driver bits 003 0301 00 2 T 15 Torx tip Torx driver bitfor T 15 size screw 003 0966 00 heads 3 T 20 Torx tip Torx driver bit for T 20 size screw 003 0866 00 heads 4 T 20 Torx tip S pecial Tool Narrow Torx driver bit 003 1457 01 for 20 size screw heads fan removal only 5 Flat bladed screwdriver Screwdriver for removing standard headed screws 6 Needle Nose Pliers Standard too 7 Nutdriver inch Standard too 8 Retaining Ring Pliers Standard too throw 9 Angle Tip Tweezers Standard too 10 Soldering Iron Standard too 1 inch minimum 11 Pliers Standard too 12 Solder Wick Standard too 13 84 hex tip Bit for 845 hex set screw 14 Adhesive TRA CON Tra Bond BA 2114 TDS 500B TDS 600B and TDS 700A Service Manual 6 11 Removal
207. ou Disconnect the fan from processor display board Unplug the fan s power cable from J20 Remove the fan Remove the two screws securing the fan to the main chassis and lift the fan away from the chassis Reinstallation Do in reverse order substeps 3 and 4 reversing the removal instructions in each substep to reinstall the assembly See the procedure Rear Cover and Cabinet page 6 18 to complete reassembly of the oscilloscope Assemble equipment and locate modules to be removed Have handy a screwdriver with a size T 15 Torx 9 tip Items 1 and 2 Find the modules to be removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 Orient the oscilloscope Set the oscilloscope so its left side is down on the work surface and its front is facing you Remove the D1 bus Grasp the D1 bus and pull it up from the oscilloscope to unplug it from its two plug in connectors J28 is the connector on the TDS 500B TDS 600B and TDS 700A Service Manual 6 29 Removal and Installation Procedures processor display board J100 is on the acquisition board Reverse these removal instructions to reinstall 4 Remove the analog power and digital power interconnect cables a Unplug the analog power cable at J26 on the display processor board at J5 on the low voltage power supply and at J700 on the acquisition board b Unplug the digital power cable at J27 on the display processor board at J6 on the low voltage power suppl
208. ound under Procedures for External Modules Do in the order listed the three procedures A74 D1 Bus and Analog Power and Digital Power Cables A11 Processor Display Board and Top Cover found under Procedures for Outer Chassis Modules page 6 29 TDS 500B TDS 600B and TDS 700A Service Manual 6 15 Removal and Installation Procedures 6 d Find and do the procedure whose title matches the name of the module to be removed under Procedures for Inner Chassis Modules page 6 46 Reinstall all modules removed Read the instructions found at the end of the procedure that removes the module to be serviced they will guide you in reinstalling all modules removed Procedures for External Modules Do the Access Procedure page 6 15 before doing any procedure in this collection The following procedures are found here and are listed in order presented Front Panel Knobs 1 6 16 Front Panel Knobs Line Fuse and Line Cord EMI Gaskets Rear Cover and Cabinet Front Cover Trim Ring Menu Buttons and Attenuator Panel A12 Front Panel Assembly Display Frame Assembly Cabinet Modules Assemble equipment and locate modules to be removed Have an angled tip tweezers Item 9 handy Find the knob s to be removed on the front panel Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its front is facing you Remove the knob s Grasp any knob you want to remove and pull it straight ou
209. outs graticule etc m Style of waveform display s vectors or dots intensified or nonintensified samples and infinite or variable persistence m Display format XY or YT m Graticule format type m Waveform interpolation filter and readout options From the Utility menu you can configure the GPIB port talk listen address etc and access internal routines for self diagnostics and self compensation Instructions for setting up communication over the GPIB are found in Section 5 Adjustment Procedures TDS 500B TDS 600B and TDS 700A Service Manual 2 15 Operating Instructions 2 16 TDS 500B TDS 600B and TDS 700A Service Manual E C 8 Theory of Operation This section describes the electrical operation of the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes using the major circuit blocks or modules This section has two main parts W Logic Conventions describes how logic functions are discussed and represented in this manual m Module Overview describes circuit operation from a functional circuit block perspective Logic Conventions The Digitizing Oscilloscopes contain many digital logic circuits This manual refers to these circuits with standard logic symbols and terms Unless otherwise stated all logic functions are described using the positive logic convention the more positive of the two logic levels is the high 1 state and the more negative level is the low
210. ove external modules Do in order the following procedures They are found under Procedures for External Modules which starts on page 6 16 a Line Fuse and Line Cord page 6 17 b Rear Cover and Cabinet page 6 18 c Front Cover Trim Ring Menu Buttons and Attenuator Panel page 6 22 d Front Subpanel page 6 51 and Display Frame Assembly 3 Remove the outer chassis modules Do in order the following procedures They are found under Procedures for Outer Chassis Modules which start on page 6 29 a Fan page 6 29 b 14 DI Bus and Analog Power and Digital Power Cables page 6 29 c A23 SerPar Board page 6 31 d A29 Video Trigger Board with option 05 page 6 32 e All Processor Display Board page 6 36 f Top Cover and Board Brackets page 6 37 g AIO Acquisition Board page 6 39 4 Remove the inner chassis modules Do in order the following procedures They are found under Procedures for Inner Chassis Modules which start on page 6 46 a 16 Low Voltage Power Supply page 6 46 b A30 Display Assembly and Supply Fuse page 6 47 5 Disassemble the chassis a Setthe assembly so its bottom is down on the work surface and its front is facing you TDS 500B TDS 600B and TDS 700A Service Manual 6 53 Removal and Installation Procedures 6 54 Remove the six screws securing the front subpanel to the main chassis See Figure 6 24 for screw location Lift the front subpanel up away from the main
211. pes Table 5 4 Test Equipment Fixtures and Supplies Item Number and Description 1 Adapter BNC Female to BNC Female 2 Adapter Probe Tip to BNC 50 O termination 3 Adjustment Tool 4 Attenuator 10X Two required 5 Attenuator 2X Minimum Requirements Tektronix part number 013 0028 00 Tektronix part number 013 0227 00 Less than 1 8 inch diameter and over 2 inches long Ratio 10X impedance 50 O connectors female BNC input male BNC output Ratio 2X impedance 50 connectors female BNC input male BNC output Example Tektronix part number 013 0028 00 Tektronix part number 013 0227 00 Tektronix part number 003 0675 00 Tektronix part number 011 0059 02 Tektronix part number 011 0069 02 Purpose Probe Adjustment Probe Adjustment Software based Adjustments used as a probe and Manual Adjustments Software based Adjustments Software based Adjustments 6 Cable GPIB IEEE Std 488 1 1987 Tektronix part number Software based Adjustments IEEE Std 488 2 1987 002 0991 01 7 Coupler Dual Input Tektronix part number Software based Adjustments 067 0525 02 8 Cable Precision 50 36 in male to male BNC Tektronix part number Software based Adjustments Coaxial connectors 012 0482 00 9 Connector Dual Female BNC to dual banana Tektronix part number Software based Adjustments Banana 103 0090 00 10 Generator Calibration High Amplitude pulse with v
212. pply Are J 27 pin 1 at 425 V and J 27 Yes Y 18 pins 1 and 2 on the All DRAM Processor Display module see Figure 6 38 have Signals similar to Figure 6 31 Replace the A30 Display Assembly No z pin 17 at 5 1 V See Figure 6 36 Perform the Low Voltage Power Supply troubleshooting procedure Figure 6 30 Color Display Troubleshooting Procedure 6 64 Y Replace the All DRAM Processor Display module TDS 500B TDS 600B and TDS 700A Service Manual Troubleshooting 10 0 5 5 8 Acqs J 18 pin 1 Horizontal Sync J 18 pin 2 Vertical Chi 2 00V ME 2 00V M5 00gs Ch2X 4V Figure 6 31 Horizontal and Vertical Sync Signals Color Display 25 0 5 5 835 Acqs White Level gt h 0 2 qe 62 1 Video Black Levels Loan rd 1 1 i EN Blanking ducc n pou NE tomy Wzo0gs Chi 7 524mV Figure 6 32 A Video Signal with White Black and Blanking Levels Color Display TDS 500B TDS 600B and TDS 700A Service Manual 6 65 Troubleshooting This procedure helps you determine whether the A10 Acquisition or the All DRAM Processor Display module is bad Replace the A14 D1 Bus module Be sure you connectthe A14 D1 Bus module correctly the Silkscreen on the module will help you correctly orient
213. press the side menu On button set the horizontal SCALE to 250 ps and be sure the vertical scale factor is kept at 1 0X and the horizontal scale factor is 2 0X Save a CH 2 waveform Press CH 2 Be sure the vertical scale factor is kept at 1 0X Then press save recall WAVEFORM Now press the main menu button Save Wfm then press the side menu button To Ref 2 Save CH 3 on some TDS models waveform m Move the coupler from CH 2 to CH 3 so that CH 1 and CH 3 are driven Press WAVEFORM OFF Press CH 3 Be sure the vertical scale factor is kept at 1 0X Then press the side menu button To Ref 3 Display all test signals m Press WAVEFORM OFF to remove CH 3 AXI on some TDS models from the display m Display the live waveform Move the coupler from CH 3 to CH 4 so that CH 1 and CH 4 are driven Press CH 4 to display Be sure the vertical scale factor is kept at 1 0X See Figure 4 11 on page 4 41 Use AX1 AX2 instead of CH3 and CH4 if your TDS model is so equipped m Display the reference waveforms To do this press the front panel button MORE Press the main menu buttons Ref 2 and Ref 3 You may notice their overlapping ground reference indicators See Figure 4 11 on page 4 41 Measure the test signal W Locate the time reference points for these waveforms Do this by first identifying the point where the rising edge of the left most waveform crosses the center horizontal graticule line Next note the correspon
214. r Signal Coupling for P robe Clip Leads 013 0076 00 Compensator Output Check 4 Terminator 50 O Impedance 50 connectors female Tektronix part number Signal Termination for BNC input male BNC output 011 0049 01 Channel Delay Test 5 Cable Precision 50 O 50 36 in male to male BNC Tektronix part number Signal Interconnection Coaxial two required connectors 012 0482 00 6 Connector Dual Banana Female BNC to dual banana Tektronix part number Various Accuracy Tests two required 103 0090 00 1 Connector BNC T Male BNC to dual female BNC Tektronix part number Checking Trigger S ensitivity 103 0030 00 8 Coupler Dual Input Female BNC to dual male BNC Tektronix part number Checking Delay Between 067 0525 02 Channels 9 Generator DC Calibra Variable amplitude to 104 V accura Data Precision 8200 Checking DC Offset Gain tion Cy to 0 196 and Measurement Accuracy 10 Generator Calibration 500 mV square wave calibrator Wavetek 9100 with options To check accuracy of CH 3 amplitude accuracy to 0 2596 100 and 250 or optionally Signal Out Tektronix PG 506A Calibration Generator ll Generator Time Mark Variable marker frequency from 10 ms Wavetek 9100 with options Checking Sample Rate and to 10 ns accuracy within 2 ppm 100 and 250 or optionally Delay time Accuracy Tektronix TG 501A Time Mark Generator 12 Probe 10X A P6139A P6243 or P6245 probe Tektronix part number P 61394 Signal Interconnec
215. ration To MAIN Generator TRIGGER OUT Digitizing Oscilloscope 50 Coaxial Cables Figure 4 20 Initial Test Hookup a Hook up test signal source 1 m Connect the standard amplitude output of a calibration generator through a 50 precision coaxial cable to CH 3 on some TDS models m Set the output of the calibration generator to 0 500 V b Hook up test signal source 2 Connect the Main Trigger Out at the rear panel to CH 2 through a 50 2 precision cable c Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init 4 58 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests d Modify the initialized front panel control settings Set the horizontal SCALE to 200 us Press SHIFT then press ACQUIRE MENU Press the main menu button Mode then press the side menu button Average Select 64 averages Do this with the keypad or the general purpose knob 2 Confirm Main and Delayed Trigger outputs are within limits for logic levels a Display the test signal Press WAVEFORM OFF to turn off CH 1 Press CH 2 to display that channel Set the vertical SCALE to 1 V Use the vertical POSITION knob to center the display on screen b Measure logic levels Press MEASURE then press the main menu button Select Measurement for Ch2 Select high and low measurements To
216. rements symbols show ground levels move here and waveform sources Seo EEL 0 when CLEAR MENU is Vertical scale horizontal scale EE 1 oU uu 0 pressed and trigger level readouts N Edge Logic E nV Pop up menu me d2o 0ms Chi oon gt Video 2 r source Coupling Slope Level Dx amp 2 UAE stor TD Sree Main menu display area Readouts in lower graticule area move here when CLEAR MENU is pressed Figure 4 1 Map of Display Functions TDS 500B TDS 600B and TDS 700A Service Manual 4 3 Performance Verification Procedures 4 4 TDS 500 TDS 600B TDS 700A Service Manual eT O J Brief Procedures The Self Tests use internal routines to confirm basic functionality and proper adjustment No test equipment is required to do these test procedures The Functional Tests utilize the probe compensation output at the front panel as a test signal source for further verifying that the oscilloscope functions properly A probe such as the P6243 or P6245 is required to do these test procedures Self Tests This procedure uses internal routines to verify that the oscilloscope functions and was adjusted properly No test equipment or hookups are required Verify Internal Equipment Re Adjustment Self quired Compensation and Prerequisites Power on the Digitizing Oscilloscope and allow a 20 minute warm
217. requisites include running the signal path compensation routine 1 Setup digitizing oscilloscope to factory defaults by completing the following steps a b Press save recall SETUP Press the main menu Recall Factory Setup Press the side menu OK Confirm Factory Init Wait for the Clock Icon to leave the screen CONFIRM the digitizing oscilloscope is setup as shown below Channel Volt div 100 mV Horizontal scale 500 us div 2 Setup digitizing oscilloscope for TV triggers by completing the following steps a b Press TRIGGER MENU Press the main menu Type pop up until you select Video Press the main menu Standard pop up until you select 625 PAL Press the main menu Line Use the keypad to set the line number to 7 press 7 then ENTER Press VERTICAL MENU TDS 500B TDS 600B and TDS 700A Service Manual 4 67 Performance Tests Press the main menu Bandwidth h Select 250 MHz from the side menu Press the main menu Fine Scale j Use the keypad to set the fine scale to 282mV press 282 SHIFT m then ENTER k Pres HORIZONTAL MENU l Press the main menu Horiz Scale m Use the keypad to set the horizontal scale to 200 ns press 200 SHIFT n then ENTER 3 Check Jitter vs Signal Amplitude a Setup equipment for Jitter Test See Figure 4 26 m Connect one of the rear panel composite outputs marked COMPST the TSG121 through a 75 cable and a 75 Q terminator to the
218. right gives the typical 98 MHz 6 3 bits 1 10 nsidiv 5 GS s with a record length of 1000 490 MHz 5 5 bits points 1 24 990 MHz 5 2 bits TDS 680B amp 684B only TDS 500B TDS 600B and TDS 700A Service Manual Typical Characteristics Table 1 16 Typical Characteristics Signal Acquisition System Cont Name Description Effective Bits TDS 520B amp 724A Sample Rate The chart on the right gives the typical Input Frequency 1 GS s 10 MS s amp HiRes effective bits for a sine wave adjusted to 9 2 divisions at 1 MHz 50 mV div 6 8 bits 9 7 bits 25 C 500 MHz 6 8 bits N A Effective Bits TDS 540B amp 754A Sample Rate The chart on the right gives the typical Input Frequency 2 GS s 10 MS s amp HiRes effective bits for a sine wave adjusted F to 9 2 divisions at 1 MHz 50 mV div 9 Hae dus 6 8 bits 9 7 bits 25 C 500 MHz 6 8 bits N A Effective Bits TDS 782A amp TDS 784A Sample Rate The chart on the right gives the typical 265 5 782A effective bits for a sine wave adjusted Input Frequency 4 GS s 784A 10 MS s amp HiRes to 9 2 divisions at 1 MHz 50 mV div 1 MHz 9 2 divs 6 6 bits 9 7 bits 25 C 1 GHz 6 5 divs 5 5 bits N A Frequency Limit Upper 250 MHz Band 250 MHz width Limited Frequency Limit Upper 20 MHz Bandwidth 20 MHz Limited Step Response Settling Errors Volts Div Setting t Step Amplitude 1 mV div 100 mV div 101 mV d
219. ritical to safe and effective servicing of this oscilloscope The following models are covered TDS 500B TDS 520B and TDS 540B TDS 600B TDS 620B TDS 644B TDS 680B and TDS 684B TDS 700A TDS 724A TDS 754A TDS 782A and TDS 784A This manual is divided into sections such as Specification and Theory of Operation Further it is divided into subsections such as Product Description and Removal and Installation Procedures Sections containing procedures also contain introductions to those procedures Be sure to read these introductions because they provide information needed to do the service correctly and efficiently The following is a brief description of each manual section W Specification contains a product description of the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes and tables of the characteristics and descriptions that apply to it m Operating Information includes general information and operating instruc tions at the level needed to safely power on and service this oscilloscope A statement of the service strategy that this manual supports and instructions for shipment of the Digitizing Oscilloscopes are found in this section m Theory of Operation contains circuit descriptions that support general service and fault isolation Performance Verification contains a collection of procedures for confirming that these Digitizing Oscilloscopes function properly and meet warranted limits m Adjustment Procedures
220. rom 500 MHz 1 GHz Input Voltage Maximum DC 1 MO 300 V DC AC 400 V peak derate at 20 dB decade above 1 MHz CAT II AC 1MQ or GND Coupled Input Voltage Maximum DC 50 or 5 with peaks lt 30 V AC 50 O Coupled Lower Frequency Limit AC Coupled lt 10 Hz when 1 MQ Coupled lt 200 kHz when AC 50 Coupled 1 Net Offset Offset Position x Volts Div Net Offset is the nominal voltage level at the oscilloscope input that corre sponds to the center of the A D converter s dynamic range Offset Accuracy is the accuracy of this voltage level The limits given are for the ambient temperature range of 0 C to 30 C Reduce the upper bandwidth frequencies by 5 MHz for the TDS 600B or by 2 5 MHz for the TDS 500B 700A for each C above 30 C 3 The Coupled Lower Frequency Limits are reduced by a factor of 10 when 10X passive probes are used Table 1 11 Warranted Characteristics Time Base System Description Accuracy Long Term Sample Rate and TDS 600B 100 ppm over any 21 ms interval uy dime TDS 500B 700A 25 ppm over any 21 ms interval TDS 500B TDS 600B and TDS 700A Service Manual 1 17 Warranted Characteristics Table 1 12 Warranted Characteristics Triggering System Name Description Sensitivity Edge Type Trigger Coupling Trigger Source set to DC Any Channel Auxiliary Accuracy Time for Pulse Glitch or Time Range Pulse Width Triggering Ins to 1
221. rtical horizontal and STATUS trigger functions from this front panel control block AEN VERTICAL HORIZONTAL ZEB TRIGGER CH1 POSITION 4 ad MAIN LEVEL TRIG D C M m CH2 READY DELAYED TRIG VERTICAL 2509 HORIZONTAL TRIGGER D E F me A SCALE dem SCALE gt SET LEVEL 57 50 B eus SINGLE TRIG x ENTER Co PROBE COMPENSATION SIGNAL GND 205 ADJUST PROBE kHz SL AT ims CH 4 T0pF CH2 sov AMS CH3 TDS 500B TDS 600B and TDS 700A Service Manual 2 9 Operating Instructions 2 10 2 Select the waveform source s Position scale and set trigger level for waveform source s directly from the front panel The steps that follow provide examples of possible control selections SAVE RECALL APPLICATION ACQUIRE AUTOSET WAVEFORM MEASURE HARDCOPY CRUN SWP SELECT STATUS UTILITY SHIFT HELP CURSOR DISPLAY AES VERTICAL HORIZONTAL AB TRIGGER C CH1 Aromon 27 4 MAIN LEVEL CAL HORIZONTAL TRIGGER n VERTI CoD CD D E 2 A SCALE aa SET LEVEL 2 8 lt 57 TO 50 2 Cy wu X ENTER SINGLE TRIG FORCE TRIG lt PROBE COMPENSATION SIGNAL GND 0 5V ADJUST wer ZN
222. s Accessory Software optional accessories listed in Table 7 4 are Tektronix software products recommended for use with your oscilloscope Table 7 4 Accessory Software Software Part Number Wavewriter AWG and waveform creation S3FT400 WaveStar Waveform capture and documentation WSTR31 LabWindows DOS version LWDOS CVI version LWCVI Telecommunication Package and i Pattern Software TTiP Warranty Information Check for the full warranty statements for this product and the products listed above on the first page after the title page of each product manual Service Assurance Tektronix offers the following services that you can purchase any time during the warranty period of this product m provides one year of post warranty repair support It is available in one year increments up to three years Wm CALXXXX provides one year of calibration support It is available in one year increments up to five years TDS 500B TDS 600B and TDS 700A Service Manual 7 7 Options and Accessories This section describes the various options as well as the standard and optional accessories that are available for the TDS 500B TDS 600B and TDS 700A Oscilloscope 7 8 TDS 500B TDS 600B and TDS 700A Service Manual Electrical Parts List The modules that make up this instrument are often a combination of mechanical and electrical subparts Therefore all replaceable mo
223. s Lower Limit Upper Limit Main Trigger DC Coupled Positive Slope Main Trigger DC Coupled Negative Slope Delayed Trigger DC Coupled Positive Slope Delayed Trigger DC Coupled Negative Slope CH1 Sensitivity 50 MHz Main CH1 Sensitivity 50 MHz Delayed CH1 AUX Trigger Input CH1 Sensitivity full bandwidth Main CH1 Sensitivity full bandwidth Delayed Output Signal Checks MAIN TRIGGER OUTPUT 1 MQ High Low MAIN TRIGGER OUTPUT 50 High Low 2 1 us 2 1 us 10 1147 V 10 1147 V 10 1147 V 10 1147 V Pass Fai Pass Fai Pass Fai Pass Fai Pass Fail Low 0 7 V Low x 0 25 V DELAYED TRIGGER OUTPUT 50 igh x Low x 0 25 V Low 0 7 V TDS 500B TDS 600B and TDS 700A Service Manual 4 25 Performance Tests TDS 500B 700A Test Record Cont Instrument Serial Number Temperature Date of Calibration TDS 500B 700A Performance Test CH 30rAX 1 SIGNAL OUTPUT 1 MQ CH 3 or AX 1 SIGNAL OUTPUT 50 Probe Compensator Output Signal Frequency CH1 Freq Voltage difference Certificate Number RH Technician Minimum Incoming Outgoing Maximum 1 050 2 4 26 TDS 500 TDS 600B and TDS 700A Service Manual Performance Tests Signal Acquisition System Checks These procedures check those characteristics that relate to the signal acquisition system and are listed as checke
224. s Press SHIFT then press ACQUIRE MENU Press the main menu button Mode then press the side menu button Average 16 Press MEASURE Press the main menu button High Low Setup then press the side menu button Min Max TDS 500B TDS 600B and TDS 700A Service Manual 4 33 Performance Tests 4 34 NOTE Refer to the Sine Wave Generator Leveling Procedure on page 4 64 if your sine wave generator does not have automatic output amplitude leveling c Hook the test signal source Connect the sine wave output of a leveled sine wave generator to CH 1 Set the output of the generator to a reference frequency of 10 MHz or less See Figure 4 7 For the optional setup using a leveled sine wave generator with a leveling head item 26 see Figure 4 8 and if using this optional setup with the example Tektronix SG 504 set the generator output to 6 MHz Sine Wave Digitizing Oscilloscope Generator Output Figure 4 7 Initial Test Hookup High Frequency Sine Wave Generator example Tek SG 504 Digitizing Oscilloscope Leveling Head Figure 4 8 Optional Initial Test Hookup 2 Confirm the input channels are within limits for analog bandwidth Do the following substeps test CH 1 first skipping substeps and b since 1 is already set up for testing from step 1 a Select an unchecked channel m Press WAVEFORM OFF to remove the channel just confirmed from display TDS
225. s and systems Table 1 1 lists key features Table 1 1 Key Features of the TDS 500B 600B and 700A Oscilloscopes Feature Digitizing rate maximum Analog bandwidth No of Channels Record lengths maximum Acquisition modes TDS 600B TDS 684B 5 GS s on each of 4 ch TDS 680B 5 GS s on each of 2 ch TDS 644B 2 5 GS s on each of 4 ch TDS 620B 2 5 GS s on each of 2 ch TDS 680B 684B 782A and 784A 1G TDS 520B 540B 620B 644B 724A a TDS 644B amp 684B 4 TDS 620B amp 680B 2 21 15 000 samples Sample envelope peak detect and average TDS 500B amp TDS 700A TDS 784A 4 65 5 TDS 540B 754A 782A 2 GS s TDS 520B 724A 1 GS s Opt 16 TDS 540B 1 GS s Hz nd 754A 500 MHz TDS 540B 754A amp 784A 4 TDS 520B 724A amp 782A 2 21 50 000 samples 500 000 with option 1M Sample envelope average high resolution and peak detect Trigger modes Display Storage Include edge logic and pulse Video trigger with option 05 modes include NTSC SECAM PAL HDTV and FlexF ormat TDS 520B 540B 620B 680B Monochrome TDS 644B 684B 724A 754A 782A 784A Color 1 44 Mbyte 3 5 inch DOS 3 3 or later 540B 620B amp 680B floppy disk optional on TDS 520B NVRAM storage for saving waveforms hardcopies and setups 1 0 Full GPIB programmability Hardcopy output using GPIB RS 232 or Centronics ports 1 Two plus Two channel operation allows up to two o
226. s than new modules and meet the same factory specifications For more information about the module exchange program call 1 800 TEK WIDE extension 6630 Module Repair and Return You may ship your module to us for repair after which we will return it to you New Modules You may purchase replacement modules in the same way as other replacement parts TDS 500B TDS 600B and TDS 700A Service Manual 10 1 Mechanical Parts List Using the Replaceable Parts List This section contains a list of the mechanical and or electrical components that are replaceable for the oscilloscope Use this list to identify and order replace ment parts The following table describes each column in the parts list Parts List Column Descriptions Column Description 1 Figure amp Index Number Items in this section are referenced by component number 2 Tektronix Part Number Use this part number when ordering replacement parts from Tektronix 3and4 Serial Number Column three indicates the serial number at which the part was first effective Column four indicates the serial number at which the part was discontinued No entries indicates the part is good for all serial numbers 5 This indicates the quantity of parts used 6 Name amp Description An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name
227. s8 TDS 600B 7 ns 5 of Delta Time Setting TDS 700A 8 5 ns 5 of Delta Time Setting Input Signal Sync Amplitude for Stable All field selections 0 6 division to 4 divisions Triggering HDTV and FLEXFMT modes Option 05 Video Trigger J itter for HDTV mode 17 nSp p Option 05 Video Trigger Sync Width Flex Format and HDTV min 400 ns modes Option 05 Video Trigger Sync Duty Cycle Flex Format and HDTV min 50 to 1 modes Option 05 Video Trigger Hum Rejection NTSC and PAL 20 dB without any trigger spec deterioration Triggering will continue Option 05 Video Trigger down to 0 dB with some performance deterioration 1 The trigger position errors are typically less than the values given here These values are for triggering signals having a slew rate at the trigger point of gt 0 5 division ns The waveform interval WI is the time between the samples in the waveform record Also see the footnote for the characteristics Sample Rate Range or Interpolated Waveform Rates in Table 1 4 on page 1 10 The minimum sensitivity for obtaining a stable trigger A stable trigger results in a uniform regular display triggered on the selected slope The trigger point must not switch between opposite slopes on the waveform and the display must not roll across the screen on successive acquisitions The TRIG D LED stays constantly lighted when the SEC DIV setting is 2 ms or faster but may flash when the SEC DIV setting is
228. scope may have powered off because it over heated Wait 5 minutes and power on the oscilloscope Are the front panel lights on the ON STBY button Are the front panel lights on Is fuse blown Replace fuse Does fuse blow again Does the oscilloscope work No Yes Turn off the principal power switch Disconnect the line cord from its power Source Remove the oscilloscope rear cover and cabinet using the Rear Cover and Cabinet removal procedure Connect the oscilloscope to the correct power source Tum on the principal power switch Check the power supply voltages on J 26 and 27 on the DRAM Processor Display module see Table 6 5 and Figure 6 36 If necessary temporarily short pins 3 and 5 of J 26 to toggle the On Standby Control circuit Are the voltages ok Yes Turn off the principal power switch Remove the two power cables from the right side of the oscilloscope Turn on the principal power switch Without a power supply load check the power supply voltages on the A17 Main LV Power Supply module see Table 6 6 and Figure 6 36 If necessary temporarily short pins 3 and 5 of J 26 to toggle the On Standby Control circuit Are the voltages ok Turn off the power switch Disconnect the line cord from its power source Replace the Low Voltage Power Supply Yes Does it po
229. scopes 1 1 Table 1 2 Record Length and Divisions per Record vs TDS Model 1 4 Table 1 3 Nominal Traits Signal Acquisition System 1 9 Table 1 4 Nominal Traits Time Base System 1 10 Table 1 5 Nominal Traits Triggering System 1 11 Table 1 6 Nominal Traits Display System 1 12 Table 1 7 Nominal Traits GPIB Interface Output Ports and Power R se 2 2 RR ee Re Sos ow es 1 12 Table 1 8 Nominal Traits Data Handling and Reliability 1 12 Table 1 9 Nominal Traits Mechanical 1 13 Table 1 10 Warranted Characteristics Signal Acquisition des 1 16 Table 1 11 Warranted Characteristics Time Base System 1 17 Table 1 12 Warranted Characteristics Triggering System 1 18 Table 1 13 Warranted Characteristics Output Ports Probe Compensator and Power Requirements 1 18 Table 1 14 Warranted Characteristics Environmental 1 19 Table 1 15 Certifications and Compliances 1 21 Table 1 16 Typical Characteristics Signal Acquisition System 1 23 Table 1 17 Typical Characteristics Triggering System 1 26 Table 2 1 Power Cord Conductor Identification 2 2 Table 2 2 Power Cord Identification 2 2 Table 2 3 Effects of Corrupted Data
230. see Rear Cover and Cabinet procedure page 6 18 to reinstall the rear cover and cabinet Do in reverse order steps 3 and 5 reversing each step to reinstall the flip stand then the handle caps if removed then the handle TDS 500B TDS 600B and TDS 700A Service Manual 6 27 Removal and Installation Procedures Push down to flex handle and flatten against cabinet then pull it out Handle Cap Removal Handle Removal Flip Stand Removal Foot Removal 2 Ss Figure 6 10 Cabinet Modules Removal 6 28 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures Procedures for Outer Chassis Modules You should have completed the Access Procedure before doing any procedure in this collection The procedures found here listed in order presented follow Fan 1 A14 D1 Busand 1 Analog Power and Digital Power Cables Fan A14 DI Bus and Analog Power and Digital Power Cables A23 SerPar Board A29 Video Trigger Board Processor Display Board Top Cover and Board Brackets Rear Panel Cables A10 Acquisition Board Rear Chassis Assemble equipment and locate module to be removed Have handy a screwdriver with a size T 20 Torx 9 tip Items 1 and 3 Locate the fan in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its left side is facing y
231. setting 10 V offset CH3 1 V Vert scale setting 18 2425 V 17 7575 V orAX1 5 Div position setting 10 V offset CH4 5 mV Vert scale setting 1 0355 V 1 0445 V orAX2 5 Div position setting 1 V offset CH4 5 mV Vert scale setting 1 0445 V 1 0355 V orAX2 5 Div position setting 1 V offset CH4 200 mV Vert scale setting 11 5195 V 11 6805 V orAX2 5 Div position setting 10 V offset CH4 200 mV Vert scale setting 11 6805 V 11 5195 V orAX2 5 Div position setting 10 V offset ale setting 17 7575 V orAX2 5 Div position setting 10 V offset ale setting 18 2425 V orAX2 5 Div position setting 10 V offset CH4 1V Vertsc 18 2425 V CH4 1 V Vert sc 17 7575 V Analog Bandwidth CH1 100 mV N A CH2 100 mV N A CH3 N A orAX1 100 CH4 424 mV N A orAX2 100 mV 4 24 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests TDS 500B 700A Test Record Cont Instrument Serial Number Temperature Date of Calibration TDS 500B 700A Performance Test Delay Between Channels Delay Between Channels Time Base System Long Term Sample Rate Delay Time Q 100 ns 10 0 ms Trigger System Accuracy Pulse Glitch or P ulse Width Hor scale lt 1 us Lower Limit Upper Limit C R ertificate Number H 96 Technician Minimum Incoming Outgoing Maximum pun N A 6 5 ns 6 5 ns Pulse Glitch or Pulse Width Hor scale gt 1 u
232. source m Connect the output of a high frequency sine wave generator through its leveling head to a female to female adapter See Figure 5 6 m Connect the female to female adapter to a BNC to probe tip adapter m Plug the probe tip from the probe on CH 1 into the BNC to probe tip adapter Levelled Sine Wave Generator Digitizing Oscilloscope BNC F emale to F emal BNC to Probe BNC Adapt Tip Adapter Figure 5 6 Initial Test Hookup TDS 500B TDS 600B and TDS 700A Service Manual 5 13 Adjustment Procedures c Initialize the oscilloscope Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory Init d Modify the initialized front panel control settings Set the vertical SCALE to 500 mV Set the horizontal SCALE to 100 ns Push SET LEVEL 50 as required to trigger the signal Press SHIFT Then press ACQUIRE MENU Press the main menu button Mode Then press the side menu button Average 16 Press MEASURE Press the main menu button Hi Low Setup Then press the side menu button Min Max Press the main menu button Select Measrmnt for 1 Repeatedly press the side menu button more until Pk Pk appears in the side menu Press the side menu button Pk Pk Press CLEAR MENU 2 Confirm that the Probe Compensator signal is within limits for bandwidth a Display and measure the
233. ss 55022 Class B Conducted Emissions EN60555 2 Power Line Harmonic Emissions Susceptibility 2 Meets or exceeds the EMC requirements of the following standards 50082 1 European Community Requirements IEC 801 2 Electrostatic Discharge Performance Criteria IEC 801 3 Radiated Susceptibility 3 V meter from 27 MHz to 500 MHz unmodulated IEC 801 4 FastTransients Performance Criteria B IEC 801 5 AC Surge Performance Criteria B 1 20 TDS 500B TDS 600B and TDS 700A Service Manual Warranted Characteristics Table 1 14 Warranted Characteristics Environmental Cont Name Third Party Certification Description Conforms to and is certified where appropriate to UL 3111 13 CSA 22 2 no 1010 13 1 VGA output cable needs to be terminated if connected at all for the Instrument to meet these standards The test will pass with LCOM part CTL3VGAMN 5 2 The GPIB cable connected to the instrument for certain of the emissions tests must be low EMI having a high quality outer shield connected through a low impedance to both connector housings Acceptable cables are Tektronix part numbers 012 0991 00 01 02 and 03 In order to maintain the EMI performance conforming to the above regulations the following cables or their equivalent should be used a shielded Centronics cable 3 meters in length part number 012 1214 00 and a shielded RS 232 cable 2 7 meters in length CA part number 0294 9 3 IEC 1010 UL 31
234. ss the side menu button Average 16 2 Compensate the Probe a Locate the probe compensation hole in the side of the probe body b Using the probe compensation tool adjust the probe for best square wave compensation flat as possible across its top See Figures 5 3 and 5 4 Figure 5 3 Performing Probe Compensation TDS 500B TDS 600B and TDS 700A Service Manual 5 11 Adjustment Procedures Probe compensated correctly Probe overcompensated Probe undercompensated Figure 5 4 Proper and Improper Probe Compensation 3 Disconnect the hookup Disconnect the probe from the probe compensator terminals leave probe installed on CH 1 and leave the oscilloscope control setup as is for doing the next part of probe adjustment Measure Probe Bandwidth Equipment Re One high frequency sine wave generator with its leveling head Item 13 quie One BNC female to female BNC adapter Item 1 One BNC to probe tip adapter Item 2 One P6139A 10X probe Item 16 1 Install the test hookup and preset the oscilloscope controls a Expose the Inner Probe Tip Follow the instructions in Figure 5 5 5 12 TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures Pull forward to remove the ground lead Unscrew the assembly ribbed 3 ferrule tip cover and pull forward to remove Pull forward to remove the retractable hook tip 1 Figure 5 5 Exposing the Inner Probe Tip b Hook up test signal
235. ss the side menu button Q to select the 1 MQ setting Press CLEAR MENU CHECK that the Ch2 High readout is 22 5 volts and that the Ch2 Low readout is lt 0 7 volts Enter high and low voltages on test record 3 Confirm CH 3 Axl on some TDS models output is within limits for gain a Measure gain Move the precision 50 cable from the rear panel DELAYED TRIGGER OUTPUT BNC to the rear panel SIGNAL OUT BNC Push TRIGGER MENU TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Press the main menu button Source Press the side menu button Ch3 Ax1 on some TDS models Set vertical SCALE to 100 mV Press SET LEVEL 50 Press MEASURE then press the main menu button Select Measrmnt for Ch2 Repeatedly press the side menu button more until Pk Pk appears in the side menu its icon is shown at the left Press the side menu button Pk Pk Press CLEAR MENU b Check against limits CHECK that the readout Ch2 Pk Pk is between 80 mV and 120 mV inclusive for the TDS 600B or is between 88 mV and 132 mV inclusive for the TDS 500B 700A Enter voltage on test record Press VERTICAL MENU then press the side menu button to toggle to the 50 Q setting Press CLEAR MENU CHECK that the readout Ch2 Pk Pk is between 40 mV and 60 mV inclusive for the TDS 600B or is between 44 mV and 66 mV inclusive for the TDS 500B 700A Enter voltage on test record 4 Disconnect the hookup Dis
236. ssis mounted part If the module is externally mounted no internal access is required remove the module Find and do the procedure whose title matches the name of the module to be removed under Procedures for External Modules page 6 16 If the module is an outer or inner chassis module access the inside of the instrument a First do the procedure Line Fuse and Line Cord then do the procedure Rear Cover and Cabinet Both are found under Procedures for External Modules immediately following this procedure After completing those procedures return to this procedure and continue with step 4 If the module is an outer chassis module remove it a If removing the attenuator or display frame assembly first do the procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel found under Procedures for External Modules page 6 16 Find and do the procedure whose title matches the name of the module to be removed under Procedures for Outer Chassis Modules on page 6 29 If the module is an inner chassis module access the inner chassis a If removing the display tube display driver board or the front subpanel first do the procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel found under Procedures for External Modules Also remove the display frame assembly found under Procedures for External Modules on page 6 16 Also if removing the front subpanel do 72 Front Panel Assembly also f
237. t CH3 5 mV Vert scale setting 10471 1 0329V orAX1 5 position setting 1 V offset CH3 200 mV Vert scale setting 11 4165 V 11 7835 V orAX1 5 Div position setting 10 V offset CH3 200 mV Vert scale setting 11 7835 V 11 4165 V orAX1 5 Div positi CH3 1V Vertsc on setting 10 V offset le setting on setting 10 V offset 17 2425 V 18 7575 V CH3 1V Vertsc a orAX1 5 Div positi a orAX1 ti 5 Div posi le setting jon setting 10 V offset 4 5 mV Vert scale setting orAX2 5Div positi on setting 1 V offset 4 5 mV Vert scale setting orAX2 5 Div posit on setting 1 V offset CH4 200 mV Vert scale setting orAX2 5 Div positi on setting 10 V offset CH4 200 mV Vert scale setting 18 7575 V B Pee ee Tae men Taur EUN euer ecu 17 2425 V 1 0471V 1 0329V 11 4165 V orAX2 5 Div position setting 10 V offset 4 1 V Vert scale setting 17 2425 V 18 7575 V orAX2 5Div position setting 10 V offset 4 1 V Vert scale setting 18 7575 V 17 2425 V orAX2 5 Div position setting 10 V offset Analog Bandwidth CH1 100 mV N A CH2 100 mV N A CH3 100 mV N A or AX1 CH4 100 mV 424mV 0 N A or AX2 4 20 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests TDS 600B Test Record Cont Instrument Serial Number Temperature Date of Cali
238. t Board Installed 6 34 Figure 6 15 Circuit Board Removal 6 35 Figure 6 16 A11 Processor Display Removal 6 37 Figure 6 17 Board Bracket Removal 6 38 Figure 6 18 A10 Acquisition Board Removal 6 41 Figure 6 19 Floppy Disk Removal 6 43 Figure 6 20 Rear Chassis Removal 6 45 Figure 6 21 A16 Low Voltage Power Supply Removal 6 47 Figure 6 22 Display Assembly Removal 6 49 Figure 6 23 Display Driver Board Removal 6 50 Figure 6 24 Front Subpanel Removal 6 52 Figure 6 25 Accessing the Protection Switch 6 58 Figure 6 26 Primary Troubleshooting Procedure 6 59 Figure 6 27 Module Isolation Troubleshooting Procedure 6 61 Figure 6 28 A16 Low Voltage Power Supply Module Isolation Troubleshooting Procedure 6 62 Figure 6 29 Power Supply Voltage Measurement Locations 6 63 Figure 6 30 Color Display Troubleshooting Procedure 6 64 Figure 6 31 Horizontal and Vertical Sync Signals Color Display 6 65 Figure 6 32 A Video Signal with White Black and Blanking Levels Color Display gt tmr eem ESTERI PUE 6 65 Figure 6 33 Processor Acquisition Troubleshooting Proced
239. t Hookup m Adjust the signal generator for three vertical divisions of 60 Hz signal See Figure 4 32 The signal will not be triggered That is it will run free Tek Run 10 0 5 5 Sample Main Scale 3ms Horizontal A Scale Main Scale 50 Pts Div 1 Delayed Scale 50 Pts Div 20097 5 00 Vid Chi i 7 ecord Scale 0 div OIOOIOIO Figure 4 32 60 Hz Rejection Test Setup Signal Check 60 Hz rejection m Use the keypad to set the horizontal scale div to 50 us press 50 SHIFT then ENTER m Reconnect the output of the signal generator Connect the composite signal connector of the PAL signal source labeled COMPST on the 4 74 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests TSG 121 to a 75 Q cable and a 75 Q terminator Connect both signals to the CH1 input through a BNC T See Figure 4 33 m Press VERTICAL MENU If needed press the main menu Fine Scale m Use the keypad to set fine scale to 500 mV press 500 SHIFT m then ENTER Connect another composite signal connector of the PAL signal source labeled COMPST on the TSG 121 through a 75 Q cable and a 75 Q terminator to the CH2 input See Figure 4 33 PAL Signal 15 Source Digitizing Oscilloscope Terminators Signal Generator EP 2 COMPST f G O p D mo 15 Q
240. t from the front panel slightly to create some clearance between the base of the knob and the front panel Insert the tweezers between the knob and front panel and use them to remove the knob See Figure 6 4 Reinstallation To reinstall align knob to shaft and push it in until it snaps TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures When reinstalling the knobs note there are three sizes Be sure to reinstall the proper size knob in the proper location Figure 6 4 Knob Removal Line Fuse and Line Cord 1 Assemble equipment and locate modules to be removed Have a flat bladed screwdriver Item 5 handy Locate the line fuse and line cord in the locator diagram External Modules Figure 6 1 2 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its rear is facing you If you are servicing the line fuse do the next step if you are servicing the line cord skip to step 4 3 Remove line fuse Find the fuse cap on the rear panel See Figure 6 5 Now remove the fuse cap by turning it counterclockwise using a flat bladed screwdriver and remove the line fuse Reverse procedure to reinstall 4 Remove line cord Find the line cord on the rear cover See Figure 6 5 Now remove the line cord retaining clamp by first unplugging the line cord from its receptacle Next grasp both the line cord and the retaining clamp an
241. tatic voltages of 1 to 30 are common in unprotected environments Table 6 1 Relative Susceptibility to Static Discharge Damage Relative Susceptibility Semiconductor Classes Levels MOS or CMOS microcircuits or discrete circuits or linear microcircuits with MOS inputs most sensitive ECL TDS 500B TDS 600B and TDS 700A Service Manual Maintenance Table 6 1 Relative Susceptibility to Static Discharge Damage Cont Relative Susceptibility Semiconductor Classes Levels Schottky signal diodes 3 Schottky TTL 4 High frequency bipolar transistors 5 JFET 6 Linear microcircuits 1 Low power Schottky TTL 8 TTL least sensitive 9 Voltage equivalent for levels voltage discharged from a 100 pF capacitor through resistance of 100 ohms 1 100 to 500 V 6 600 to 800 V 2 200 to 500 V 7 2 400 to 1000 V est 3 250 V 8 900 V 4 500 V 9 1200 V 5 400 to 600 V TDS 500B TDS 600B and TDS 700A Service Manual 6 3 Maintenance Inspection and Cleaning General Care Inspection and Cleaning Procedures A 6 4 Inspection Cleaning describes how to inspect for dirt and damage It also describes how to clean the exterior and interior of the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes Inspection and cleaning are done as preventive maintenance Preventive maintenance when done regularly may prevent oscilloscope malfunction and enhance its reliability Preve
242. te synchronous In either case logic triggering is configurable for sources for boolean operators to apply to those sources for logic pattern or state on which to trigger for mode auto or normal and for holdoff Time qualification may be selected in pattern mode Another class of logic trigger setup hold triggers when data in one trigger source changes state within the setup and hold times that you specify relative to a clock in another trigger source Pulse main trigger system Pulse triggering is configurable for triggering on runt or glitch pulses or on pulse widths or periods inside or outside limits that you specify It can also trigger on a pulse edge that has a slew rate faster or slower than the rate you specify The timeout trigger will act when events do not occur in a defined time period The pulse trigger is also configurable for source polarity mode and holdoff Video with option 05 Video Trigger Video triggering is compatible with standard NTSC PAL SECAM and HDTV formats An additional feature called FlexFormat flexible format allows the user to define the video format on which to trigger You can choose where the trigger point is located within the acquired waveform record by selecting the amount of pretrigger data displayed Presets of 10 50 and 90 of pretrigger data can be selected in the horizontal menu or the general purpose knob can be assigned to set pretrigger data to any value within the 096 t
243. teps a Unplug the interconnect cable from the GPIB connector on the rear cover at J35 of the processor display board Disconnect the monitor cable at J5 Unplug J62 video signal connector J51 RS 232 connector and J38 floppy driver connector Grasp the board by its right and left sides and pull it towards the rear of the oscilloscope This will disconnect the processor display board from the eight board mounts securing the board above the top cover Lift the board up away from the oscilloscope chassis to complete the removal Reinstallation a Do in reverse order steps 3 through 4 reversing the removal instructions of each step to reinstall the processor display board See the procedures A74 DI Bus and Analog Power and Digital Power Cables page 6 29 23 SerPar Board page 6 31 if option 05 is TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures installed A29 Video Trigger Board and Rear Cover and Cabinet page 6 18 to complete reassembly of the oscilloscope 7 ja lt NN 137 Slide the A11 DRAM Processor Display board to 2 the rear to release it from the board mounts then lift up to complete removal ToJ2 Figure 6 16 A11 Processor Display Removal Top Cover and Board 1 Assemble equipment and locate modules to be removed Brackets a Have handy a screwdriver with a size T 15 Torx 9 tip Items 1 and 2 and if removing any b
244. that control the bandwidth for each vertical scale setting have not changed h Check remaining vertical scale settings against limits optional m If desired finish checking the remaining vertical scale settings for the channel under test by repeating substeps d through g for each of the remaining scale settings listed in Table 4 4 for the channel under test m When doing substep e skip the subparts that turn on the CHx Pk Pk measurement until you check a new channel m Install remove 10X attenuators between the generator leveling head and the channel input as needed to obtain the six division reference signals listed in the table i Testall channels Repeat substeps a through g for all four channels 3 Disconnect the hookup Disconnect the test hook up from the input connector of the channel last tested Equipment Re One sine wave generator Item 19 or optionally item 25 uired 27 4 One precision coaxial cable Item 5 One 50 terminator Item 4 One dual input coupler Item 8 Prerequisites See page 4 15 See Input Channels vs Model on page 4 2 STOP DO NOT use the vertical position knob to reposition any channel while doing this check To do so invalidates the test 1 Install the test hookup and preset the instrument controls a Initialize the front panel W Press save recall SETUP Press the main menu button Recall Factory Setup Press the side menu button OK Confirm Factory In
245. tion or P6245 13 3 5 inch 720 K or Programming Examples Checking File System Basic 1 44 Mbyte DOS com Software Disk Tektronix part Functionality patible floppy disk number 063 1134 XX that comes with the TDS Family Programmer Manual Tektro nix part number 070 9556 XX 14 Generator Video Signal Provides PAL compatible outputs Tektronix TSG 121 Used to Test Video Option 05 Equipped Instruments Only 4 16 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Table 4 1 Test Equipment Cont Item Number and Description 15 16 17 60 Hz Sine wave Wavetek 9100 with options 100 and 250 or optionally Tektronix SG 502 Tektronix CF G280 or optionally PG 502 15 Q 36 in male to male BNC Tektronix part number connectors 012 1338 00 Oscillator Leveled Sine wave Generator Pulse Generator Cable Coaxial two required Purpose Used to Test Video Option 05 Equipped Instruments Only Used to Test Video Option 05 Equipped Instruments Only Used to Test Video Option 05 Equipped Instruments Only 18 Terminator 75 two required Impedance 75 connectors female Tektronix part number BNC input male BNC output 011 0102 01 Used to Test Video Option 05 Equipped Instruments Only 19 Rohde amp Schwarz SMY3 100 kHz to atleast 400 MHz Variable Generator Sine Wave amplitude from 12 mV to 2 Vy Frequency accuracy 22 096 Checking Analo
246. tion of a range of NTSC PAL SECAM and high definition TV signals IF Floppy disk drive Add 3 5 inch 1 44 MByte floppy disk drive L 3 Option applies to TDS 500B TDS 620B amp TDS 680B only 16 1G second sample max Limitsample rate to 1 GS s maximum This option allows sales in export controlled countries Option is only available for the TDS 540B TDS 500B TDS 600B and TDS 700A Service Manual 7 1 Options and Accessories Table 7 1 Options Cont Option Label Description 13 RS 232 Centronics Hard Add RS 232 C and Centronics interface ports CEE o copy Interface Ports Option applies to TDS 500B TDS 620B amp TDS 680B only 1K Scope cart K420 scope cart This cart can help transport the oscilloscope Jt around many lab environments i 1M 130 000 record length Extend record length from 50 000 samples standard as follows a TDS 520B TDS 724A amp TDS 782A To 250 000 samples on one channel and 130 000 on two channels TDS 540B TDS 754A amp TDS 784A To 500 000 samples on one channel 250 000 on two channels and 130 000 samples on three or four channels Option is only available for the models listed above 1R Rackmount Oscilloscope comes configured for installation in a 19 inch wide instrument rack
247. to bind or snag the cabinet on the oscilloscope s internal cabling as you remove it STOP DO NOT do steps 6 through 8 to remove the EMI gasket s unless they must be replaced due to damage If you are not replacing those gaskets skip to Step 9 When reinstalling EMI gaskets and or the oscilloscope cabinet carefully follow the instructions given Unless they are performed properly the oscilloscope may not meet its emissions requirements EMI 6 Assemble equipment and locate modules to be removed a Have handy a pair of needle nose pliers Item 6 b Locate the modules to be removed in the locator diagram External Modules Figure 6 1 7 Remove the EMI gaskets a Look for the point where the ends of the gasket touch in the channel at the rear edge of the cabinet b Use a pair of needle nose pliers to pry up one of the ends c Grasp the EMI gasket and gently pull it out of the its channel d Repeat substeps a through c to remove the gasket from its channel on the front casting 8 Reinstallation of EMI gaskets Press each EMI gasket back into its groove at the rear edge of the cabinet or front casting Make sure the ends of the gasket touch but do not overlap when installing Cut off excess length if required to prevent overlap 9 Reinstallation of cabinet and rear cover a Do in reverse order steps 3 and 4 to reinstall the cabinet TDS 500B TDS 600B and TDS 700A Service Manual 6 19 Removal and Inst
248. tomated measurements in a production or research and development environment that calls for repetitive data taking Self compensation and self diagnostic features built into the Digitizing Oscilloscope to aid in fault detection and servicing are also accessible using commands sent from a GPIB controller The oscilloscope can also output copies of its display using the hardcopy feature This feature allows you to output waveforms and other on screen information to a variety of graphic printers and plotters from the TDS front panel providing hard copies without requiring you to put the TDS into a system controller environment You can make hardcopies in a variety of popular output formats such as PCX TIFF BMP RLE EPS Interleaf and EPS mono or color You can also save hardcopies in a disk file in any of the formats above The hardcopies obtained are based on what is displayed on screen at the time hardcopy is invoked The hardcopies can be stamped with date and time and spooled to a queue for printing at a later time You can output screen information via GPIB RS 232C or Centronics interfaces TDS 500B TDS 600B and TDS 700A Service Manual 1 7 Specifications Display 1 8 Zoom The TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes offer flexible display options You can customize the following attributes of your display Color TDS 644B TDS 684B and TDS 700A Waveforms readouts graticule and variable persistence
249. tructions for the Assembly front panel and front panel buttons Unless either of those modules are being serviced do not do step 4 Further disassembly of front panel assembly 1 Assemble equipment and locate modules to be removed a Have handy a screwdriver with a size 15 Torx tip Items 1 and 2 b Locate the modules to be removed in the locator diagram External Modules Figure 6 1 c Do the procedure Front Cover Trim Ring Menu Buttons and Attenuator Panel steps 1 5 immediately preceding this procedure 2 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its front is facing you 3 Remove the front panel assembly a Liftthe front panel assembly out of the front subpanel until you can reach the interconnect cable connecting it to the processor display board b Disconnect that cable at J2 of the processor display board Disconnect the flex board connector at P3 of the front panel assembly The flex board is part of the display frame assembly Disconnect cable W76 See Figure 6 8 c Finally lift the front panel assembly out of the front subpanel to complete the removal TDS 500B TDS 600B and TDS 700A Service Manual 6 23 Removal and Installation Procedures 6 24 Disconnect Stud Mount Torxdrive Screw T 15 W76 Cable Power Assembly DN 22073 a Sem Front P anel Assembly Backof 25 Fr
250. ttenuates signals above 30 kHz One and one half times the DC coupled limits for frequencies above 80 kHz Attenuates signals below 80 kHz 1 0 division from DC to 500 MHz at vertical settings gt 10 mV div and lt 1 V div at the BNC input 1 0 division from DC to 500 MHz at vertical settings gt 10 mV div and x 1 V div at the BNC input 1 0 division at vertical settings gt 10 mV div and lt 1 V div at the BNC input For vertical settings gt 10 mV div and lt 1 V div at the BNC input Minimum Minimum Pulse Minimum Re Arm Time Between Triggering Type Width Width Channels Logic Not Applicable lns lns Events Delay 1 ns for either or Not Applicable 2 ns pulse widths 1 26 TDS 500B TDS 600B and TDS 700A Service Manual Typical Characteristics Table 1 17 Typical Characteristics Triggering System Cont Name Description Width Minimum Pulse and Rearm for For vertical settings gt 10 mV div and 3 1 V div at the BNC input Pulse Triggering Minimum Pulse The minimum pulse widths and rearm Pulse Class Width Minimum Re Arm Width widths and transition times required for Glitch 1ns 2 ns 5 of Glitch Width Setting Pulse Type triggering Runt 2 ns 2 ns Time Qualified Runt 2 ns TDS 600B 7 ns 5 of Width Setting TDS 700A 8 5 ns 5 of Width Setting Width lns 2 ns 5 of Width Upper Limit Setting Timeout lns 2 ns 5 of Width Upper Limit Setting Slew Rate 600 p
251. ual Performance Tests b Press WAVEFORM OFF Press HORIZONTAL MENU d Use the keypad to set horizontal scale div to 50 us press 50 SHIFT then ENTER e Press SHIFT then press ACQUIRE MENU f Press the main menu Stop After Press the side menu RUN STOP button only h Press the main menu Mode i Press the side menu Sample j Press RUN STOP k Press VERTICAL MENU 1 Use the keypad to set fine scale to 300 mV press 300 SHIFT m then ENTER m CONFIRM that the TRIG D LED stays lighted and that the waveform on screen is stable That is it does not move horizontally or vertically Also CONFIRM that the waveform on the screen has one positive pulse and a number of negative pulses See Figure 4 29 TDS 500B TDS 600B and TDS 700A Service Manual 4 71 Performance Tests Tek Run 1 00MS s Sample Fine Scale 300mV E Chi j Fine Scale Fine Scale 1 Positive pulse Negative pulses UE soomi 1 M50 0us VidChi i 7 27 Coupling Bandwidth RR Position offset Cal Probe bc 250 mHz MERO initialized DIGIC OIC G Figure 4 29 Triggered Signal Range Test 300 mV n Use the keypad to set the fine scale to 75 mV press 75 SHIFT m then ENTER o CONFIRM that the TRIG D LED stays lighted and that the waveform on screen is st
252. up Diagnostics before doing this procedure None 1 Verify that internal diagnostics pass Do the following substeps to verify passing of internal diagnostics a Display the System diagnostics menu m Press SHIFT then press UTILITY m Repeatedly press the main menu button System until Diag Err is highlighted in the pop up menu b Run the System Diagnostics First disconnect any input signals from all four channels W Press the main menu button Execute then press the side menu button OK Confirm Run Test D c Wait The internal diagnostics do an exhaustive verification of proper oscilloscope function This verification will take up to three and a half minutes on some models At some time during the wait a clock icon shown at left will appear on screen When the verification is finished the resulting status will appear on the screen d Confirm no failures are found Verify that no failures are found and reported on screen TDS 500B TDS 600B and TDS 700A Service Manual 4 5 Brief Procedures Highlight Cal 1 4 6 Press SHIFT then press UTILITY Confirm the three adjustment sections have passed status Highlight Cal in the pop up menu by repeatedly pressing the main menu button System See Figure 4 2 Verify that the word Pass appears in the main menu under the following menu labels Voltage Reference Frequency Response and Pulse Trigger See Figure 4 2 Run the signal path compensation
253. up Hold Violation Trigger Setup Time 100 ns to 100 ns Hold Time 1nsto 100 ns Setup Hold Time 2 ns ForSetup Time positive numbers mean a data transition before the clock edge and negative means a transition after the clock edge For Hold Time positive numbers mean a data transition after the clock edge and negative means a transition before the clock edge Setup Hold Time is the algebraic sum of the Setup Time and the Hold Time programmed by the user Ranges Trigger Level or Threshold Source Range Any Channel 12 divisions from center of screen Auxiliary 8 V Line 400 V Video Trigger Modes of Operation Supports the following video standards TIG m NTSC 525 60 2 field mono or 4 field m PAL 625 50 2 field mono or SECAM 8 field m HDTV 787 5 60 1050 60 1125 60 1250 60 m FlexFormat user definable standards User can specify field rate number of lines sync pulse width and polarity line rate and vertical interval timing TDS 500B TDS 600B and TDS 700A Service Manual 1 11 Nominal Traits Table 1 6 Nominal Traits Display System Name Description Video Display 7 inch diagonal with a display area of 5 04 inches horizontally by 3 78 inches vertically TDS 520B 540B 620B and 680B Monochrome display TDS 644B 684B 724A 754A 782A and 784A Color display Video Display Resolution 640 pixels horizontally by 480 pixels vertically Waveform Display Graticule Si
254. ure 6 66 Figure 6 34 Processor Front Panel Troubleshooting Procedure 6 67 Figure 6 35 Attenuator Acquisition Troubleshooting Procedure 6 68 Figure 6 36 A11 DRAM Processor Display Module View of Right Side oper o e re tee oe we eis 6 70 Figure 6 37 A11 DRAM Processor Display Module View of Upper Left 6 71 Figure 6 38 A11 DRAM Processor Display Module View of Lower Left 6 71 Figure 6 39 A10 Acquisition Module View of Lower Right Corner 6 72 Figure 9 1 Interconnections 9 2 Figure 9 2 Block 9 4 Figure 10 1 External Modules 10 7 TDS 500B TDS 600B and TDS 700A Service Manual V Table of Contents vi Figure 10 2 Outer Chassis Modules 10 9 Figure 10 3 Inner Chassis Modules 10 11 Figure 10 4 Cables Bottom 10 13 Figure 10 5 Cables Top 10 15 Figure 10 6 Floppy Disk 10 17 Figure 10 7 Accessories 10 19 TDS 500B TDS 600B and TDS 700A Service Manual Table of Contents List of Tables Table 1 1 Key Features of the TDS 500B 600B and 700A Oscillo
255. ures b Separate the circuit board with attached cable number 1 from the rear plate with attached brackets number 2 Figure 6 13 Remove Circuit Board From Assembly 3 Replace circuit board Equipment Required One 6 inch nutdriver a Replace the failed circuit board with a replacement A23 SerPar Board ordered from the factory see Replaceable Parts List for detailed ordering information Do in reverse order steps a and b of the Circuit Board Removal From Assembly procedure on the previous page b Reinstall the A23 SerPar Board assembly in the oscilloscope Do in reverse order steps a and b of the Remove circuit board from assembly procedure shown above Then see the following procedure to complete reassembly of the oscilloscope W Rear Cover and Cabinet page 6 18 d To ensure the A23 SerPar Board is working correctly perform the power up short diagnostics procedure described on page 6 57 A29 Video Trigger Board Additional modules Removed D1 bus and analog and digital power cables 1 Assemble equipment and locate modules to be removed a Have handy a screwdriver with a size T 15 Torx tip Items 1 and 2 6 32 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures b Locate the modules to be removed in the locator diagram Outer Chassis Modules Figure 6 2 page 6 13 See also the A29 Video Trigger Board on Figure 6 15 page 6 35 Do the procedures A74 D1 Bus a
256. us 1 02 us tols Sensitivity TDS 620B amp 644B 0 35 division from DC to 50 MHz increasing to 1 division at 500 MHz TDS 680B amp 684B 0 35 division from DC to 50 MHz increasing to 1 division at 1 GHz TDS 500B 724A amp 754A 0 35 division from DC to 50 MHz increasing to 1 division at 500 MHz TDS 782A amp 784A 0 35 division from DC to 50 MHz increasing to 1 division at1 GHz TDS 600B 250 mV from DC to 50 MHz increasing to 500 mV at 100 MHz TDS 500B 724A amp 754A 400 mV from DC to 50 MHz increasing to 750 mV at 100 MHz TDS 782A amp 784A 250 mV from DC to 50 MHz increasing to 500 mV at 100 MHz Accuracy 20 of setting 0 5 ns 100 ns 0 01 of Setting Input Signal Sync Amplitude for Stable Field selection Odd Even or All 0 6 division to 4 divisions Triggering NTSC and PAL modes Option 05 Video Trigger Field selection Numeric 1 division to 4 divisions NTSC mode Jitter Option 05 Video Trigger 60 on NTSC or PAL signal 1 The minimum sensitivity for obtaining a stable trigger A stable trigger results in a uniform regular display triggered on the selected slope The trigger point must not switch between opposite slopes on the waveform and the display must not roll across the screen on successive acquisitions The TRIG D LED stays constantly lighted when the SEC DIV setting is 2 ms or faster but may flash when the SEC DIV setting is 10 ms or slower
257. val and Installation Procedures Procedures for the removal of defective modules and replacement of new or repaired modules Also included is a procedure for disassembly of the oscilloscope for cleaning Troubleshooting Information for isolating failed modules Included are instructions for operating the oscilloscope s internal diagnostic routines and troubleshooting trees Most of the trees make use of these internal diagnostic routines to speed fault isolation to a module Related Maintenance Procedures The following sections contain information and procedures related to mainte nance Section 2 Operating Information covers instructions useful when operating the oscilloscope in order to troubleshoot it It also details the service strategy and lists options for obtaining maintenance service and for replacing failed modules Section 3 Theory of Operation contains a circuit description at the module or block level Section 4 Performance Verification contains procedures that may be useful in isolating problems to modules by testing oscilloscope performance Section 5 Adjustment Procedures addresses after repair adjustment and the interval between periodic adjustments It contains a procedure for adjusting the internal circuits of the oscilloscope Section 9 Diagrams contains a block diagram using individual modules as blocks and an interconnection diagram showing connections between the modules Section 10 Mechanica
258. ve a 5 8 Locate the two small access holes on the right side of the oscilloscope cabinet near the front Insert the adjustment tool Item 3 in the hole nearest the front of the oscilloscope about 1 2 inch to engage the rocker switch Push to rock the switch to its unprotected enabled position See Figure 5 1 TDS 500B TDS 600B and TDS 700A Service Manual Adjustment Procedures Unprotected Protected Figure 5 1 Accessing the Protection Switch 6 When adjustment has been completed to protect the adjustment constants against alteration CAUTION Be sure to disable the NVRAM Protection switch as instructed below a Locate the two small access holes on the right side of the oscilloscope cabinet near the front See Figure 5 1 b Insert the adjustment tool Item 3 in the hole nearest the rear of the oscilloscope about 1 2 inch to engage the rocker switch Pushto rock the switch to its protected disabled position d Todo a complete adjustment as defined on page 5 3 you must also do the procedure Compensate the Probe on page 5 10 if you are using the optional P6139A probe TDS 500B TDS 600B and TDS 700A Service Manual 5 9 Adjustment Procedures Probe Adjustment for the P6139A Probe STOP It is not necessary to do this procedure to perform a complete adjustment unless you are using the optional P6139A probe This probe adjustment is divided into three parts
259. vironment before it is adjusted Adjustments done before the operating temperature has stabilized may cause errors in performance TDS 500B TDS 600B and TDS 700A Service Manual 5 1 Adjustment Procedures Access System Optional Peripherals Usage Test Equipment Performing the Adjustments Except when adjusting the display assembly the cabinet is not removed Instead you enable the internal adjustment constants of the oscilloscope to be written Two small holes in the chassis allow service personnel to insert a tool and push a switch to enable or disable the writing of new adjustment constants to nonvolatile RAM The procedure that follows will tell you how and when to enable and disable the writing of adjustment constants Be sure to disable the switch when you have finished adjusting the oscilloscope The following computer and peripherals are required to adjust this oscilloscope An IBM compatible computer equipped as follows m Eight MHz clock speed or faster m DOS 3 2 or higher m 640K Resident RAM with 580 Available RAM m A hard drive m A high density floppy drive 3 5 inch 1 44 M or 5 25 inch 1 2 M A GPIB board National Instruments GPIB PCII GPIB PCIIA or A PC GPIB Package that includes the is available Tektronix part number S3FG210 m Suitable keyboard and monitor Installation of a math coprocessor in your system is strongly recommended to
260. want to order a firmware update contact your Tektronix service center Unprotected Protected Figure 6 25 Accessing the Protection Switch 6 58 TDS 500B TDS 600B TDS 700A Service Manual Troubleshooting Press on the principal power switch on the back of the oscilloscope Power off and remove the cover using the Rear Cover and Cabinet removal No procedure Check all the cables coming outofthe Low Voltage Power Supply and the cabling between modules Be Press the ON STBY button Can you hear the Can you N hear the fan p Yes sure every cable is attached securely Yes Perform the A16 Low Voltage Power Supply Module A il Isolation troubleshooting e oscilloscope rocedure powers on do the front No Perform the Processor Front Panel panel lights come on and then go off about 30 troubleshooting procedure There is something Seconds wrong with the ON STBY later button P erform the system power Processor F ront Panel um on now troubleshooting procedure Does Yes the display seemw Vo E to be working at all Yes Is the display No readable and m stable Yes the oscilloscope respond correctly when the front panel buttons are pushed No Perform the Processor F ront Panel troubleshooting procedure Yes
261. waveform is stable Press Sync Polarity Press Pos Sync Push the pulse generator COMPLEMENT button out m CONFIRM that the TRIG D LED is lighted and the waveform is stable TDS 500B TDS 600B and TDS 700A Service Manual 4 83 Performance Tests m Disconnect the signal source from wait a few seconds then reconnect the signal m CONFIRM that the TRIG D LED is lighted and the waveform is stable m Disconnect all test equipment from the digitizing oscilloscope Press save recall SETUP the main menu button Recall Factory Setup and the side menu OK Confirm Factory Init Sine Wave Generator Leveling Procedure Some procedures in this manual require a sine wave generator to produce the necessary test signals If you do not have a leveled sine wave generator use one of the following procedures to level the output amplitude of your sine wave generator Equipment Re quired Sine wave generator Item 19 Level meter and power sensor Item 20 Power splitter Item 21 Two male N to female BNC adapters Item 23 One precision coaxial cable Item 5 Prerequisites See page 4 15 4 84 TDS 500B TDS 600B and TDS 700A Service Manual Performance Tests Sine Wave Dices Level Generator Digitizing Oscilloscope Meter Power Splitter Output Attenuators if necessary Power Sensor
262. wer cord other than the one supplied refer to Table 2 2 Power Cord Identification TDS 500B TDS 600B and TDS 700A Service Manual 2 1 Installation Operating Voltage Table 2 1 Power Cord Conductor Identification Alternate Color Ungrounded Line Black Grounded Neutral Light Blue White Conductor Grounded Earthing Green Yellow Green Table 2 2 Power Cord Identification Plug Configuration Normal Usage Option Number North America Standard 125V Europe 230V United Kingdom 230 V North America 230V S witzerland A5 230V This oscilloscope operates with any line voltage from 90 250 VACgys with line frequency from 45 440 Hz There are two fuses either of which may be used throughout the line voltage and frequency ranges The two fuses are not totally interchangeable as each requires a different fuse cap TDS 500B TDS 600B and TDS 700A Service Manual Installation Memory Backup Power Memory modules with on board batteries allow the TDS 500B TDS 600B and TDS 700A Digitizing Oscilloscopes to retain some types of data upon loss of the AC power source The stored adjustment constants saved front panel settings current front panel settings instrument status and waveforms saved in memory are retained The on board batteries of the memory modules have a shelf life of about five years Partial or total loss of stored settings upon power on may indicate that the memory mo
263. wer on normally and pass all the diagnostics Turn off the principal power switch oscilloscope have adequate ventilation as specified in Section 2 Operating Information on page 2 3 Yes Disconnect the line cord from its power source Remove the oscilloscope rear cover and cabinet using the Rear Cover and Cabinet removal procedure Create adequate ventilation across 27 pins 1 and 3 on the All DRAM Processor Display module See Figure 6 36 Replace the DRAM Processor Display module The Low Voltage Power Suppl is ok Perform the P rimary troubleshooting procedure Replace the A10 Acquisition module Connect the fan fan s connector securely attached to J 20 on DRAM Processor Display module See Figure 6 37 Yes Unplug the fan power on the oscilloscope and probe J 20 Is Replace the fan Figure 6 28 A16 Low Voltage Power Supply Module Isolation Troubleshooting Procedure 6 62 TDS 500B TDS 600B and TDS 700A Service Manual Troubleshooting Table 6 5 Normal Supply Voltages Measured on J26 and J27 on the A11 DRAM Processor Display Module Supply Lower Limit Upper Limit Ground 26 27 pin 15 45 1 VA J 27 pin 5 5 0 V 5 2 V 5 1 VB 27 pin 17 5 0 V 5 2 V 25 V J 27 pin 1 23 5 V 27 5 V 5 V J 26 pin 39 44 9 V 51V 5 1 V J
264. will move off screen W Press the main menu button Offset 4 31 Performance Tests m Use the keypad to set vertical offset to the positive polarity setting listed in the table for the current vertical scale setting The baseline level will remain off screen m Set the generator to the level and polarity indicated in the table for the vertical scale position and offset settings you have made The DC test level should appear on screen If it doesn t return the DC accuracy check is failed for the current vertical scale setting of the current channel e Measure the test signal Press CLEAR MENU Read the measurement results at the Mean measurement readout See Figure 4 6 ag D Tek Run 100 5 5 Average 1 1 03820 V Turm on the measurement called mean and read the results here COICOICOICOICO M soogs Chi J 965M 23 Feb 1994 12 20 36 Figure 4 6 Measurement of DC Accuracy at Maximum Offset and Position f Check against limits m CHECK that the readout for the measurement Mean readout on screen 1s within the limits listed for the current vertical scale and position offset generator settings Enter value on test record m Repeat substep d reversing the polarity of the position offset and generator settings as is listed in the table m CHECK that the Mean measurement readout on screen is within
265. with color coding Intensity waveforms readouts and graticule m Style of waveform display s vectors or dots intensified or nonintensified samples infinite persistence and variable persistence Interpolation method Sin x x or Linear m Display format xy or yt with various graticule selections including NTSC and PAL to be used with video trigger option 05 This oscilloscope also provides an easy way to focus in on those waveform features you want to examine up close By invoking zoom you can magnify the waveform using the vertical and horizontal controls to expand or contract and position it for viewing TDS 500B TDS 600B and TDS 700A Service Manual Nominal Traits This section contains a collection of tables that list the various nominal traits that describe the TDS 500B TDS 600B and TDS 700A oscilloscopes Electrical and mechanical traits are included Nominal traits are described using simple statements of fact such as Four all identical for the trait Input Channels Number of rather than in terms of limits that are performance requirements Table 1 3 Nominal Traits Signal Acquisition System Name Bandwidth S elections Description 20 MHz 250 MHz and FULL Samplers Number of TDS 540B 644B 684B 754A and 784A Four simultaneous TDS 520B 620B 680B 724A and 782A Two simultaneous Digitized Bits Number of 8 bits Input Channels Number of Four Input Couplin
266. y and at J101 on the acquisition board Analog and Digital Power Cables Interchangeable Figure 6 11 A14 D1 Bus and Analog Power and Digital Power Cables Removal 5 Reinstallation a Do in reverse order steps 3 and 4 reversing the procedure outlined in each step to reinstall the assembly b When installing the D1 bus be sure to orient it so the single connector at the bottom of the bus plugs into the acquisition board Seethe procedure Rear Cover and Cabinet page 6 18 to complete reassembly of the oscilloscope 6 30 TDS 500B TDS 600B and TDS 700A Service Manual Removal and Installation Procedures A23 SerPar Board 1 Remove circuit board assembly RS232 Centronics Hardcopy Interface Optional on the TDS 500B 620B and 680B b Disconnect the cable connector number 2 from the processor display circuit board connector number 1 a Using a screwdriver with size T 15 Torx tip remove the two screws number 4 in Figure 6 12 securing the rear plate of the circuit board assembly c Pull out the A23 SerPar Board assembly number 3 Figure 6 12 Remove Circuit Board Assembly From Oscilloscope 2 Remove circuit board from assembly a Using a inch nutdriver remove the four lock connectors number 3 in Figure 6 13 securing the circuit board to the rear plate TDS 500B TDS 600B and TDS 700A Service Manual 6 31 Removal and Installation Proced
267. ystem Text and waveforms are processed by different parts of the display circuitry The display system sends the text and waveform information to the tube assembly as a video signal The display system also generates and sends vertical VSYNC and horizontal HSYNC sync signals to the tube assembly A VGA compatible video output is at the rear of the TDS 500B TDS 600B and TDS 700A All information waveforms text graticules and pictographs is displayed by the A30 31 32 Display system The A30 generates the high voltages necessary to drive the display tube It also contains the video amplifier horizontal oscillator and the vertical and horizontal yoke driver circuitry TDS 500B TDS 600B and TDS 700A Service Manual Theory of Operation Front Panel The processor system sends instructions to and receives information from the Front Panel Processor on the A12 Front Panel board The Front Panel Processor reads the front panel switches and potentiometers Any changes in their settings are reported to the processor system The Front Panel Processor also turns the LEDs on and off and generates the bell signal Front panel menu switches are also read by the Front Panel Processor The processor sends any changes in menu selections to the processor system The ON STBY switch is one of the menu switches However it is not read by the Front Panel Processor but passes through the A12 Front Panel board and the A11 DRAM Processor Display board to th
268. ystem operates a Select the delayed time base m Press HORIZONTAL MENU W Press the main menu button Time Base Press the side menu button Delayed Triggerable then press the side menu button Delayed Only m Set the horizontal SCALE for the D delayed time base to 200 us Select the delayed trigger level menu m Press SHIFT then press DELAYED TRIG Press the main menu button Level then press the side menu button Level Confirm that the following statements are true m The trigger level readout for the delayed trigger system changes as you turn the general purpose knob W As you rotate the general purpose knob the square wave probe com pensation signal can become triggered and untriggered Leave the signal untriggered which is indicated by the display not updating W Pressing the side menu button Set to 50 triggers the probe com pensation signal that you just left untriggered Leave the signal triggered Verify the delayed trigger counter Press the main menu button Delay by Time m Use the keypad to enter a delay time of 1 second Press 1 then press ENTER TDS 500B TDS 600B and TDS 700A Service Manual Brief Procedures m Verify that the trigger READY indicator on the front panel flashes about once every second as the waveform is updated on screen 4 Remove the test hookup Disconnect the probe from the channel input and the probe compensation terminals Verify the File System Equipme
269. z the test frequency from Table 4 4 1 0015 Chit 40mV 23 reb 1994 15 38 29 Setthe horizontal scale 2 from Table 4 4 COICOICOICO CO CO Figure 4 9 Measurement of Analog Bandwidth g Check against limits m CHECK that the Pk Pk readout on screen is within the limits listed in Table 4 4 for the current vertical scale setting Enter voltage on test record m When finished checking set the horizontal SCALE back to the 50 ns setting STOP Checking each channel s bandwidth at all vertical scale settings is time consuming and unnecessary You may skip checking the remaining vertical scale settings in Table 4 4 that is skip the following substep h if this digitizing oscilloscope has performed as follows m Passed the 100 mV vertical scale setting just checked in this procedure W Passed the Verify Internal Adjustment Self Compensation and Diagnostics procedure found under Self Tests on page 4 5 TDS 500B TDS 600B and TDS 700A Service Manual 4 37 Performance Tests 4 38 Check Delay Between Channels NOTE Passing the signal path compensation confirms the signal path for all vertical scale settings for all channels Passing the internal diagnostics ensures that the factory set adjustment constants

Service Manual TDS 500B, 600B & TDS 700A Digitizing

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Service Manual TDS 500B, 600B &amp; TDS 700A Digitizing

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Service Manual TDS 500B, 600B & TDS 700A Digitizing