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1. 8 T 5 5 3 z 1 MALE T EL ASHROMN 1 FLASH 0 16 31 LCDDATAO S LCDDATAO R 1 P 5753 LCDDATAO R475 R421 L421 iz 3 47 aL 25MHZ 0E FF 0474 474 1 1 0 100nF LCDDATAi S LCDDATA R 1 3 ___ 1 R470 i 8420 2110 D 0 9 ROMAS 23 R422 L422 Ee 4 28 HBOMDI6 47E al 25 2 x 1 Not placed ROMAS oe ROMD17 C470 C471 C472 C473 s lt 1 ROMAG 33 HOMD18 LCDDATA2 S LCDDATA2 R 1 P PY LCDDATA2 R476 100nF 100nF 10012 1000F 83 282 322 8222252 2422943 EE INTEL OPTION ROMAT AS ROMD19 E 4 4500005 d Roas um
2. 8 7 6 5 4 3 2 1 205 R210 R282 x 10 pcBlAS cons Am 54 3 1345 67 2 15k GNDATr 1 100nF 10E C281 47uH 10uF R211 R212 R213 R214 22uF 10Meg 10Meg 10Meg 10Meg T R284 ih R205 i VATTN3V3 9 Cosi 4 3V3A 1 4 5 6 100 10E Ann 4JpF 147E 4JpF NC200 14 R220 SWHFO db R286 L283 10M9 12 GNDHFO VAMPPSUP 33 o 4 5 1 4 5 6 7 C213 8208 C214 R217 C216 alls 100nF 10E 16 T H 2 HFA EN 4JpF 0E 4JpF 215 4 7 201 17 34 _ ca R289 15 GNDHF1 VAMPN3V3 32 C218 C219 8225 mM R288 C289 10E R216 4 18 100nF HF2 295 4 7pF 6 20 SWHF2 C288 10E GNDHF2 100nF C287 E m 222 219 C223 m 22uF tl 21 ura r 464 4 TpF C231 SNDHES GNDDIG 35 30 EM _ c221 _ es T FBO VDIGN3V3 sare 33pF Hid 680fF T 290 Tom nd C232 1Meg 4 100nF 100nF 0283 i R218 R221 37 6258 1 1 22uF 68 1E 68 1E R232 C ASIC 150pF CHANNEL
3. 54 sank 2 S 553 2 608 El 8 amp E i E 354 ds g BU m 6511 g 25 2 g E un UU um 8 z Raa R134 Rigo 53 0134 2 es P amp ua 25 s H a a 89 2 N600 407 lg gm o Puppe T 3 z i 409 5 eg 2 SEE gt x pez 158 27 C190 m RAZA 40 8E Riel R157 9 m 1506 i gg 16 Rie 42 R507 d 8 k gt 0330 8m 158 RM 2 R416 E n 5 kadi 8 2 Gig C416 8 Mox 18 al al 68 e z Hi 2 R480 33 S E l E 8 436 431 441 344 Ne re g 5 a omn o 463 311 R371 s arcam 9 E ME rm gen SAREE ba 493 R433 434 B m z R434 438 39 x 6232 8236 253 FS a B Lm 65 lt lt 8490 R508 Bn N534 i cm 233 234 6591 494 1480 R390 0460 B o
4. 8 7 6 5 4 3 2 1 ene ee 3V3ADCA 3V3ADCD F ADC CHANNEL A R404 1E 1E C416 C408 100nF 100nF 4 VDDAA DDDA 4 REFADCT T ae E R400 C402 AD9280 98 100nF 0410 AVDD DRVDD JE 100 21 RefTS 22 1 MIDADC 44 C406 C407 24 Rete her R401 4 10uF 4 100nF 25 Rams DO 10k C405 e Di 1 deon Vref D2 E 4 RefSense D3 D4 nant 1 T 27 vin D5 06 C401 20 D7 4TpF 4181 Clamp DC A 00 7 5 23 Mode OTR STBY Three State 5 SMPCLK 15 Clock AGND DRGND lol L D Ea oe p k S 3V3ADCA 3V3ADCD l _ADC CHANNEL B R457 R454 C466 C458 100nF 100nF 17 VDDAB 4 REFADCT DDDB 1 t D451 R450 C452 AD9280 10K 100nF C460 AVDD DRVDD 100 21 Rens 22 2 _ 4 C456 C457 24 aca net R451 4 104 4 100nF 25 Reps DO 10k C455 E D1 REFADCB 4 nn Vref 2 t RefSense D3 D4 CORE 2 ADC B 27 Vin D5 D6 C451 20 07 4TpF 4181 Clamp DC 00 71 5 23 400 __ ADC A DO Mode SIR 401 ADC A D1 402 ADC A 02 SU suis NC403 ADC D3 4 5 SMPCLK 15 Clock NC405 ADE 55 DRGND
5. 7 7 7 5 Miscellaneous Functions 7 8 7 5 1 Display and Back Light 7 8 te Ae et eo nd 7 9 RIZ SLOW ADC t 7 10 TDA Keyboard i hak lana Q eR re eere ciere 7 11 7 5 5 Optical Port Serial RS232 Interface 7 11 7 5 6 Channel A Channel B Voltage easurements 7 11 7 5 7 Channel A Ohms and Capacitance Measurements 7 13 1 5 8 Trigger EUnCtlODs serere en ith 7 14 753 9 7 15 7 5 TO Buzzer ete reete eee ned 7 15 75 11 bee 7 16 Fil ZARA IL 7 16 TST Power ON OFF 7 16 MP 7 17 7 5 15 Randomize Circuits reb Her abe E Eee erstes 7 17 7 6 Loading SOfLWATe cien ete rte etr ee e HI ET oda laqay pa Peak cents 7 17 7 7 Configuration of CPLD chip 0470 sse ener 7 17 Corrective Maintenance 7 7 1 Introduction 7 1 Introduction This chapter describes troubleshooting procedures that can be used to isolate problems with the tes
6. 6 6 4 n i Y N 3 013 N AN 6665 77 7060641 2561 E as 5 3 H 3 1 ND N 969 16541 F 29641 1064 lt s a e c 3 J EET JILIN E E 524 1890 E i L 0640 i 227958 E OY O 5 gt lt q 5 4 Z m 09910 6092 2 694105 200 16 41 EI 18 91 S e lt gt 5 N m P T _ 8 p e 8 41 Uu m 105 eRe L 2 5 ie 96941 BS 8 5 lt Um 5 Egg eg Eu YC a B 8 2 N 1092 Jig geedl ree 5 gt gr ON o RS LAT 8 70 N r4 Bhran c T S EEEN JD B _ 1268 90 5 o EE amp S nnnnnnnnnnnnn E OvSN JE i
7. 4 5 4 5 1 Input A and B Base Line Jump Test 4 6 4 5 2 Input A Trigger Sensitivity 4 7 4 5 3 Input A Frequency Response Upper Transition Point Test 4 8 4 5 4 Input A Frequency Measurement Accuracy Test 4 9 4 5 5 Input B Frequency Measurement Accuracy Test 4 9 4 5 6 Input B Frequency Response Upper Transition Point Test 4 10 4 5 7 Input B Trigger Sensitivity Test 4 11 4 5 8 Input and B Trigger Level and Trigger Slope Test 4 12 4 5 9 Input A and B DC Voltage Accuracy Test 4 14 4 5 10 Input and B AC Voltage Accuracy Test 4 16 4 5 11 Input A and B AC Input Coupling Test 4 17 4 5 12 Input A and B Volts Peak Measurements Test 4 18 4 5 13 Input A and B Phase Measurements Test 4 19 4 5 14 Input A and B High Voltage AC DC Accuracy Test 4 20 4 5 15 Resistance Measurements Test sss 4 2 4 5 16 Continuity Function Test 4 22 4 5 17 Diode Test Function Test a 4 23 4 5 18 Ca
8. a s 5 13 5 9 Capacitance Gain Calibration Input 5 14 6 1 Fluke 123 Main Assembly ipininta innesi a enne ayah nennen 6 4 6 2 Flex Cable Connectors n eder tee 6 5 6 3 Main PCA Unit As sembly uu l a nm eere 6 7 6 4 Mounting the display shielding 2 1 1 2 4202020 2 2022 20 0000040000000000000000 6 9 6 5 Battery pack installation 6 10 7 1 Operative Test Tool without Case sess 7 3 9 1 Circuit Diagram 1 Channel A Circuit esee 9 3 9 2 Circuit Diagram 2 Channel B 9 4 9 3 Circuit Diagram 3 Analog to Digital Conversion essen 9 5 9 4 Circuit Diagram 4 Trigger 9 6 9 5 Circuit Diagram 5 Digital Circuit essen eene 9 7 9 6 Circuit Diagram 6 Power 9 8 9 7 Circuit Diagram 7 Slow ADC Backlight Converter 9 9 9 8 Circuit Diagram 8 Keyboard Circuit essen 9 10 9 9 PCA Large Component Side n sassa 9 11 9 10 Main PCA Small Component SMD 5 4 22 00 0 0 000000000000000044 9 12 Chapter 1 Safety Instructions Title Page Introduction iiie eoe IO are 1 3 1 2 Safety Precautions ne er repite ie eee t Pee 1 3 1 3 Cauti
9. aa 39 x r 4 FBC AC DC R104 zl TP153 K1718 3 R161 R156 9 ok DACTEST 24 gt DACTESTA 7 R160 100k C156 100k R137 R138 R139 R140 51 1k 1nF 2 GPROT c l 106 C102 C106 562k 56 2k 56 2k 56 2k L R165 Input block 400E 100nF 4 7nF ADDRESS 23 gt SENSE 4 100 R141 R143 154 2 4 REFATT P 38 GALSIG 8157 9 215k 909k ADC 9 R142 C142 43 162 PROTGND R144 C145 Ci46 8146 28 1 1 215k MIDADC Br 4 9 100nF TP156 158 TRIGGER 29 Tou gt TRIGA 4 5 0 Not placed R159 lt T cs lt _ TRACEROT 24 o 100pF 100E 4 L 44 SDAT 245 lt 245 4 0 X153 X152 Shield2 4411 8 7 6 5 4 4 3 2 1 Figure 9 1 Circuit Diagram 1 Channel A Circuit 9 3 123 124 Service Manual
10. Figure 3 8 C ASIC Block Diagram 3 15 123 124 Service Manual LF input The LF input pin 42 is connected to a LF decade attenuator in voltage mode or to a high impedance buffer for resistance and capacitance measurements The LF decade attenuator consists of an amplifier with switchable external feedback resistors R131 to R136 Depending on the selected range the LF attenuation factor which will be set to 1 10 100 1000 10 000 The C ASIC includes a LF pre amplifier with switchable gain factors for the 1 2 5 steps HF input The HF component of the input signal is supplied to four external HF capacitive attenuators via C104 and R108 Depending on the required range the C ASIC selects and buffers one of the attenuator outputs 1 10 100 HF2 or 1000 HF3 By attenuating the HF3 input internally by a factor 10 the C ASIC can also create a 10000 attenuation factor Inputs of not selected input buffers are internally shorted If required optional FETs V151 V153 can be installed They will provide an additional input buffer short for the not selected buffers to eliminate internal in the C ASIC cross talk To control the DC bias of the buffers inputs their output voltage is fed back via an internal feed back resistor and external resistors R115 R111 R120 R112 R113 and R114 The internal feed back resistor and filter R110 C105 will eliminate HF feed back to obtain a large HF gain The C ASIC i
11. for z7V If not correct check N501 pin 20 for z15V supplied via R502 If 15V on pin 20 is correct check C507 replace N501 P7VCHA is the supply voltage for the charger control circuit in N501 It is derived from VADAPTER 20 by an internal linear supply in 501 6 Check N501 pin 12 NETVALID for 2 7V and TP529 MAINVAL for 3 3V The NETVALID and MAINVAL signals indicate to the P ASIC and the D ASIC that a correct power adapter voltage is connected The signals enable control of the P ASIC CHARGE circuit controls V506 by 100 kHz 13Vpp square wave If correct continue at step 7 Corrective Maintenance 7 3 Charger Circuit If not correct then a Check TP571 3V3GAR for 3V3V If not correct possibly caused by V569 R580 TP571 short to ground loose pins of N501 N501 defective Check N501 pin 8 VADALOW for 1 1V If not correct 1 Check 2515 and connections The P ASIC supplies a current to R515 The current source uses REFPWM2 and IREF see 2 and 3 below 2 Check 501 73 REFPWM2 for 3 3 REFPWM2 is supplied by the P ASIC Check TP307 N501 pin 72 REFP for 1 22V check V301 and R307 3 Check N501 pin 74 IREF for 1 61V If not correct possibly caused by R528 loose pin 74 or N501 defective Check 3V3SADC on N501 pin 65 for 3 3V 7 Check TP531 CHARCURR The CHARCURR signal controls the battery charge current If TP531 2 7V continue at ste
12. enne nennen nennen nnns 32 3 2 Fluke 123 Start up Sequence Operating Modes 3 8 3 3 Power Supply Block Diagram essen nennen nnns 3 9 3 4 CHAGATE Control Voltage n nus 3 12 3 5 Fly Back Converter Current and Control Voltage 3 12 3 6 Fly Back Converter Block 3 13 3 7 Back Light Converter Voltages essen nenne 3 15 3 8 C ASIC Block naa enne enn nnne nnns 3 15 3 9 Capacitance 3 19 3 10 T ASIC Trigger Section Block Diagram eene 3 21 3 11 Random Repetitive Sampling 3 22 3 12 Reference Voltage Section 3 24 Controls So sete 3 27 4 1 Display Pixel Test Patteri uidere ete erret ntes 4 5 4 2 Menutem SeleCtiOn u y ba m u T u 4 6 4 3 Test Tool Input A to 5500A Scope Output 5009 4 8 4 4 Test Tool Input B to 5500A Scope Output 500 4 10 4 5 Test Tool Input to 5500A Normal Output eee 4 12 4 6 Test Tool Input to 5500A Normal Output for gt 300V
13. 1 090 H S 1 9 1 9 2 1 1 S 1 x 1 5 5 1 a 5 dal 1 gt 1 2 5 INZGUVE AHSLLVS 1 BON sssi i HVOEAE 1 2 1 1 REEF 1 AlddNs 0 1 1 1 Dr ie ee ee 1 TANNVHO SSeS a SKS SSS C SSS SSS SS SS SS SSS SS SSS SSS lt lt lt ss 1 1 1 1 1 j 1 OL Sng WMwdv 1 5 8 5 1vas 10449 882000 ED X dus 81385340 1 i H 1 1 1 ECC i x 800v 1 l 3dONOHMd 1 SH suani 1 uw p X t aaa WOO 1 WAHVOA 1 1 1 1 3ZINOGNVH 1 VIS3IOVG I I nods 1 1 33Oq1OH 1 1 Sir 8520 00 9rviva l mna 1 215 1 v oav 1 2 BVOEAE Snaoavs o eee emm 1 1 1 91 viva 2 1 WOH dW31 007 1 HSV14 097 1 Wz ssauaav sna ao espxl 1 1 1 1 1 1 I i 1 cmd E ST7965 WMF Figure 3 1 Fluke 123 124 Block Diagram 3 2 Circuit Descriptions 3 3
14. 4 20 4 7 Test Tool Input to 5500A Normal Output 4 WIre 4 21 4 8 Test Tool Input A to TV Signal Generator sss 4 24 4 9 Test Tool Screen for PAL SECAM line 622 sese 4 25 4 10 Test Tool Screen for NTSC line 525 nennen 4 25 4 11 Test Tool Screen for PAL SECAM line 310 1 1 0000000000000000 000504 4 26 4 12 Test Tool Screen for NTSC line 262 21 02000440000 00000000 000000000000 4 26 4 13 Test Tool Input A to TV Signal Generator Inverted 4 26 4 14 Test Tool Screen for PAL SECAM line 310 Negative Video 4 27 4 15 Test Tool Screen for NTSC line 262 Negative Video 4 27 5 1 Version amp Calibration 5 5 3 5 2 Display Test Pattern u as sa ete ente eh e ater e tee Her deeds 5 6 5 3 Gain Calibration Input Connections a s 5 7 5 4 5500A Scope Output to Input 5 9 5 5 5500A Scope Output to Input 5 10 123 124 Service Manual 5 6 Volt Gain Calibration Input Connections lt 300V sese 5 11 5 7 Volt Gain Calibration Input Connections 500V 5 12 5 8 Four wire Ohms calibration connections
15. i FLYSENSP R570 57 HMAXFLY 52 VCOIL l CONTROL 458 3V3A 51 VOUTHI R558 R552 COSC 43 I R554 54 VSENS PST 62 PWRONOFF R553 72 1 23 POWER ASIC Figure 3 6 Fly Back Converter Block Diagram Slow ADC Refer to Figure 9 7 The Slow ADC enables the D ASIC to measure the following signals BATCUR BATVOLT BATTEMP BATIDENT Battery current voltage temperature type DACTEST A DACTEST B and DACTEST T test output of the C ASIC s and the T ASIC De multiplexer D531 supplies one of these signals to its output and to the input of comparator 531 TP536 The D ASIC supplies the selection control signals SELMUXO 2 The Slow ADC works according to the successive approximation principle The D ASIC changes the SADCLEV signal level and thus the voltage level 3 13 123 124 Service Manual on pin 3 of the comparator step wise by changing the duty cycle of the PWM signal SADCLEVD The comparator output SLOWADC is monitored by the D ASIC who knows now if the previous input voltage step caused the comparator output to switch By increasing the voltage steps the voltage level can be approximated within the smallest possible step of the SADCLEV voltage From its set SADCLEVD duty cycle the D ASIC knows voltage level of the selected input 5232 Refer to Figure 9 6 The optical interface is used for two purposes enable serial communication RS232 between the test tool
16. CL 0600 2 Connect the test tool to the 5500A as shown in Figure 5 3 Do NOT use 500 terminations FLUKE 5500A CALIBRATOR PM9093 PM9091 001 1 5m PM9092 001 0 5m T8097 ST8097 WMF Figure 5 3 HF Gain Calibration Input Connections 5 7 123 124 Service Manual 3 Set the 55004 to source a 1 kHz fast rising edge square wave Output SCOPE MODE edge to the first calibration point in Table 5 1 Set the 5500A in operate OPR Press to start the calibration Wait until the display shows calibration status READY Press ZZ to select the next calibration step set the 5500A to the next calibration point and start the calibration Continue through all calibration points in Table 5 1 8 Set the 5500A to source 1 kHz square wave Output SCOPE MODE wavegen WAVE square to the first calibration point in Table 5 2 9 Press E to select the first step in Table 5 2 10 Press E to start the calibration 11 Wait until the display shows calibration status READY 12 Press E to select the next calibration step set the 5500A to the next calibration point and start the calibration Continue through all calibration points Table 5 2 13 When you are finished set the 5500A to Standby 14 Continue at Section 5 6 2 Table 5 1 HF Gain Calibration Points Fast Cal step 5500A Setting Test Tool Input Signal 1 Requirements 1 1 kHz no 1 kHz trise lt 100 ns 500 flatness after r
17. Operational amp Power adapter connected and test tool on Test tool operational and Charge mode batteries will be charged Operational mode No power adapter connected battery Test tool operational powered installed and test tool on by batteries 3 3 Detailed Circuit Descriptions 3 3 1 Power Circuit The description below refers to circuit diagram Figure 9 6 Power Sources Operating Modes Figure 3 3 shows a simplified diagram of the power supply and battery charger circuit SUPPLY FLY BACK CONVERTER 9V3G R VBAT FROM POWER CHARGER CONVERTER R503 VBATSUP 60 69 66 ADAPTER d ert 506 1501 z R513 VBATHGH 7 Vref R501 78 BATVOLT 79 epe mm Level shift 1 I 77 BATCUR 80 CHARCURR EE 2 R514 i IMAXCHA _ 6 Ios R502 _ 19 12 Vses LV566 SE C502 18 PCHA linear regulator linear regulator POWER ASIC Figure 3 3 Power Supply Block Diagram 3 9 123 124 Service Manual As described in Section 3 2 5 the test tool operating mode depends on the connected power source The voltage VBAT is supplied either by the power adapter via V506 L501 or by the battery pack It powers a part of the P ASIC via R503 to pin 60 VBATSUP If the test tool is off the Fly Back Converter is off and VBAT powers the D ASIC via transistor
18. IZH 1090 is 10954 ew qe N Ne Ut a _____ 3189 nmn d 2 99191 95041 Hz ow predi 5 52415 2 013 1012 BL ee 0000000 026241 cozy 9429 LCD EDT i py ye 0 010000000 0000000 1013 6 6 123 124 Service Manual
19. The T ASIC supplies a current via the relays to the unknown resistance Rx connected to the Input A and the COM input jacket The voltage drop across Rx is measured as for voltage measurements Capacitance measurements Input A only The T ASIC supplies a current via the Q F relays to the unknown capacitance Cx connected to the Input and the COM input jacket Cx is charged and discharged by this current The C ASIC converts the charging time and the discharging time into a pulse width signal This signal is supplied to the T ASIC via the C ASIC trigger output TRIG A The T ASIC shapes and levels the signal and supplies the resulting pulse width signal ALLTRIG to the D ASIC The D ASIC counts the pulse width and calculates the capacitance reading When the capacitance function is selected no other measurement or wave form display is possible There is only a numeric readout of the capacitance value Frequency pulse width and duty cycle measurements The input voltage is measured as described above From the ADC samples to built the trace also the frequency pulse width and duty cycle of the input signal are calculated Miscellaneous Control of the C ASIC e g selecting the attenuation factor is done by the D ASIC via the SDAT and SCLK serial communication lines An offset compensation voltage and a trace position control voltage are provided by the D ASIC via the APWM bus The C ASIC s also provide conditioned input
20. 569 3V3GAR This 3V3GAR voltage is controlled and sensed by the P ASIC If it is NOT OK 3 05V the output VGARVAL pin 64 is low The VGARVAL line is connected to the D ASIC and if the line is low the D ASIC is inactive the test tool is in the Idle mode A low VGARVAL line operates as a reset for the D ASIC If VGARVAL is high 3 V3GAR gt 3 05V the D ASIC becomes active and the Off mode is entered The D ASIC monitors the P ASIC output pin 12 MAINVAL and the test tool ON OFF status By pressing the ON OFF key a bit in the D ASIC indicating the test tool ON OFF status is toggled If neither a correct power adapter voltage is supplied MAINVAL is low or the test tool is turned on the Off mode will be maintained If a correct power adapter voltage is supplied MAINVAL high or if the test tool is turned on the mask software starts up The mask software checks if valid instrument software is present If not e g no instrument firmware 15 loaded the mask software will keep running and the test tool is not operative the test tool 1s in the Mask active state For test purposes the mask active mode can also be entered by pressing the and gt key when the test tool is turned on If valid software is present one of the three modes Operational Operational amp Charge or Charge will become active The Charger Converter circuit is active in the Operational amp Charge and in the Charge mode The Fly back converter is active
21. Ig n ZIF CONNECTOR 22nF 1 VDDVAL 8888 ENABLEMAIN G TP480 C493 a 3885 1Meg vo S555 yo R488 100nF TP495 ion ores eb in 1 338 475 CPLD OFF 485 cs I 1 2222 m Not placed R495 M CONTRAST wH x ameo 8 E 1 474 8486 vo 24 TP481 Nol placed vec 3 16k MAINVAL 6 2 80 9 PWRONOFF 6 R481 R482 R483 MAINXTALO a E5 TCK C TP484 R499 1 Tk 1 VDDVAL 4 VGARVAL 9 CONTRAST CONTR_D 1Meg 825 C490 1Meg R484 Not placed CLK TCK 1 Not placed 4 RST H495 BATIDENT 67 38 30 E 180pF 511E ROMRST TDLC TP485 En ND TDI GND R496 B402 TP486 BAT74 3 16k We TXD 6 R405 f eas L i 1 0473 MED e 1k 511E i D2 TMS CO TP488 TPS3823 25DBVR 4002 IL DEBUG 4 3 6864MHz acp s R491 23487 2 y ev voz Pen olen ce BTA 4 A BES VDDVAL VGARVAL 1 sva 12 46 7 lt 4 3 30 3 6 7 XIMS 18pF 18pF 18pF v c ceu 1 30VD 6 lt 7 XTDI TP455 NC7WZ17P6X C489 WATCHDOG d C404 5 o TP454 22nF MS d 403 470 1014 TP453 SN20 1013 5 F psuzo 1012 C491 ol TXD2 100nF 3 1002 ____ 0 TP450 R407 3 16k 4 R489 X400 Not
22. 50 MHz in Autorange Full Scale Reading Duty Cycle DUTY Range Frequency Range for Continuous Autoset Accuracy Q1 Hz to MHz 21 MHz to 10 MHz Pulse Width PULSE Frequency Range for Continuous Autoset Accuracy Q1 Hz to 1 MHz 21 MHz to 10 MHz 010 MHz to 40 MHz Full Scale reading Amperes AMP Ranges Scale Factor Accuracy Temperature TEMP Range Scale Factor Accuracy Decibel dB 0 dBV 0 dBm 6000 50Q dB on Full Scale Reading Crest Factor CREST Range Accuracy Characteristics 2 2 3 Dual Input Meter 0 5 2 counts 1 0 2 counts 2 5 2 counts 2 5 2 counts 10 000 counts 2 to 98 15Hz 1Hz to 30 MHz 0 5 2 counts 1 0 2 counts 15Hz 1Hz to 30 MHz 0 5 2 counts 1 0 2 counts 2 5 2 counts 1000 counts with optional current probe same as VDC VAC VAC DC or PEAK 1 mV A 10 mV A 100 mV A and 1 V A same as VDC VAC VAC DC or PEAK add current probe uncertainty with optional temperature probe 200 C div 200 F div 1 mV C and 1 mV F as VDC add temperature probe uncertainty 1V 1 mW referenced to 600Q or 50Q VDC VAC or VAC DC 1000 counts 1 to 10 5 1 count 2 7 123 124 Service Manual Full Scale Reading Phase Modes Range Accuracy Resolution 2 3 2 Input A Ohm Ranges Accuracy Full Scale Reading 5000 to 5 30 Measurement Current Open Circui
23. 7 5 3 Slow ADC Check the following signals 1 BATCUR 501 pin 77 must be 1 63 6 7 x IBATP Volt If not correct replace N501 Measure IBATP on X503 pin 3 7 N501 pin 9 IBATP senses the battery current 2 BATVOLT 501 pin 78 must be 0 67 x VBAT 3 27 Volt If not correct replace N501 Measure VBAT on TP504 N501 pin 3 VBAT senses battery the voltage 3 01 pin 79 must be TEMP IBATP Volt If not correct replace N501 Measure TEMP on N501 pin 5 2X503 pin 6 TEMP senses the battery temperature Measure IBATP on X503 pin 3 7 N501 pin 9 IBATP senses the battery current 4 3V3SADC must be 3 3V supplied by N501 pin 65 If not correct check if the 3V3SADC line is shorted to ground If it is not then replace N501 5 SELMUXn TP591 TP592 TP593 supplied by the D ASIC must show LF pulses OV to 3 3V 0 5 3 seconds period 6 Check TP536 TP537 and TP534 for signals shown below typical examples measured signals may have different pulse amplitude and repetition rate TP536 if at a fixed level replace D531 TP537 if not correct trace signal to PWM circuit on the Digital part TP534 if at a fixed level replace N531 mM oen 4 536 537 534 0 5 lt 500 ms Corrective Maintenance 7 7 5 Miscellaneous Functions 7 5 4 Keyboard Proceed as follows 1f one or more keys cannot be operated 1 Replace
24. Note The ALLTRIG signal is also used for frequency pulse width and capacitance measurements Section 3 3 2 The Synchronize Delta t part provides an output pulse TRIGDT The front edge of this pulse is the real trigger moment The pulse width is a measure for the time between the trigger moment and the moment of the first sample after the trigger This pulse width information is required in random repetitive sampling mode see below The HOLDOFF signal supplied by the D ASIC releases the trigger system The sample clock SMPCLK B also provided by the D ASIC is used for synchronization Real time sampling TRIGDT signal For time base settings of 1 us div and slower the pixel distance on the LCD is 240 ns 1 division is 25 pixels As the maximum sample rate is 25 MHz a sample is taken each 40 ns So the first sample after a trigger can be assigned to the first pixel and successive samples to each next pixel So a trace can be built up from a single period of the input signal Random repetitive equivalent sampling TRIGDT signal For time base settings below 1 us div the time between two successive pixels on the screen is smaller than the time between two successive samples For example at 20 ns div the time between two pixels 1s 20 25 0 8 ns and the sample distance is 40 ns sample rate 25 MHz A number of sweeps must be taken to reconstruct the original signal see Figure 3 11 As the samples are taken randomly with respect
25. Observe the Input A trace and check to see if it is set to the same position after changing the sensitivity The allowed difference is 0 04 division 1 pixel 7 Using toggle the sensitivity of Input B between 5 and 10 mV div After changing the sensitivity wait some seconds until the trace has settled Observe the Input B trace and check to see if it is set to the same position after changing the sensitivity The allowed difference is 0 04 division 1 pixel 8 When you are finished remove the Input A and Input B short 4 5 2 Input A Trigger Sensitivity Test Proceed as follows to test the Input A trigger sensitivity 1 Connect the test tool to the 5500A as shown in Figure 4 3 FLUKE 5500A CALIBRATOR ST8004 WMF Figure 4 3 Test Tool Input A to 5500A Scope Output 500 2 Select the following test tool setup 4 7 123 124 Service Manual 4 8 10 11 12 e Press to select auto ranging AUTO in top of display Do not press EC anymore e Using ES change the sensitivity to select manual sensitivity ranging and lock the Input A sensitivity 200 mV div Set the 5500A to source a 5 MHz leveled sine wave of 100 mV peak to peak SCOPE output MODE levsin Adjust the amplitude of the sine wave to 0 5 division on the display Verify that the signal is well triggered If it is not press to enable the up down arrow keys for Trigger Level adjustment adjust the trigger level
26. WITH 120 200 100 50 1 0 01 0 02 0 05 01 02 05 1 2 5 10 20 50 100 FREQUENCY 2 ST8112 CGM Figure 2 1 Maximum Input Voltage vs Frequency 2 12 Characteristics 2 2 8 Safely Input Voltage limitation for CAT II for CAT 1000 100 01 0 1 0 1 1 10 100 100 f MHz Figure 2 2 Max Input Voltage v s Frequency for VP40 10 1 Voltage Probe 123 124 Service Manual 2 9 EMC Immunity The Fluke 123 124 including standard accessories conforms with the EEC directive 89 336 for EMC immunity as defined by IEC1000 4 3 with the addition of tables 2 1 to 2 3 Trace Disturbance with STL120 See Table 2 1 and Table 2 2 Table 2 1 No Visible Trace Disturbance No visible disturbance E 3 V m E 10 V m Frequency range 10 kHz to 27 MHz 100 mV div to 500 V div 500 mV div to 500 V div Frequency range 27 MHz to 1 GHz 100 mV div to 500 V div 100 mV div to 500 V div Table 2 2 Trace Disturbance lt 10 Disturbance less than 10 of full scale E 3 E 10 V m Frequency range 10 kHz to 27 MHz 20 mV div to 50 mV div 100 mV div to 200 mV div range 2 MHz to 1 GHz 10 mV div to 20 mV div no visible disturbance Test tool ranges not specified in Table 2 1 and Table 2 2 may have a disturbance of more than 10 of full scale Multimeter disturbance See Table 2 3 VDC VAC DC with STL 120 and short ground lead e
27. 1 Single shot triggering The DUALTRIG signal is supplied to the synchronization delta T circuit The trigger levels TRIGLEV1 and are set just above and below the DC level of the input signal A trigger is generated when the signal crosses the trigger levels A trigger will occur on both a positive or a negative glitch This mode ensures triggering when the polarity of an expected glitch is not known 2 Qualified triggering e g TV triggering The ALLTRIG signal is supplied to T ASIC output pin 35 which is connected to the D ASIC input pin A16 B15 The D ASIC derives a qualified trigger signal 3 21 123 124 Service Manual 3 22 TRIGQUAL from ALLTRIG e g on each 10th ALLTRIG pulse a TRIGQUAL pulse is given The TRIGQUAL is supplied this to the synchronize delta T circuit via the select logic 3 Normal triggering The ALLTRIG signal is supplied to the synchronization delta T circuit The ALLTRIG signal includes all triggers It is used by the D ASIC for signal analysis during AUTOSET Traditionally a small trigger gap is applied for each the trigger level In noisy signals this small gap triggering would lead to unstable displaying of the wave form if the noise is larger than the gap The result is that the system will trigger randomly This problem is solved by increasing the trigger gap TRIGLEV1 TRIGLEV2 automatically to 80 10 to 90 of the input signal peak to peak value This 80 gap is used in AUTOSET
28. 1 iind 3 1 gt PROBE 5 4 V LMC7101BIM5X D V600 NTMS3PO3R2 Loo HER 2 fc NEAT pe 2 9602 HV OUTPUT 75602 47nF MS453 TP601 TP602 MBRS340T3 1 C609 X601 al 1 1 33pF 1 MOD 7 MALE S TR 1600 5454 R601 N600 68 1E 16 TP603 P TP600 2 AU BEND 15 tole V603 C603 cour 1 601 1 BAS16 4 TLON DF3N04 alge E 100nF T 88 od 11 1 3930 356 R605 1uF Nic 10 C607 C606 um A E 10k 26 10nF 100nF 678XN 1081 V605 6605 B BC858CLT1 C611 inF les 1 EM JT UGSBI2DW TP604 4 veot2 R606 DF3NO4 5 TLON a 6 19k 5 2 R602 R604 B 4 1k 10k R603 605 R600 p 10 PAL 1 I BACKBRIG 5 M V604 BACKLIGHT CONVERTER 7 8 7 6 5 4 4 3 2 1 Figure 9 7 Circuit Diagram 7 Slow ADC Backlight Converter 9 9 123 124 Service Manual ROWO ROW ROW2 ROWS3 ROWA ROWS KEYPAD FOIL 58 IS SX PS Se So So SP SO SO SOS 55525555555 X 222 SHIELDI s MS445 MS444 5443 MS442 MS441 MS440 MS439 438 5437 5436 5435 5434 5433 5432 MS431 USER OPTIONS 78108 20030206 Figure 9 8 Circuit Diagram 8 Keyboard Circuit Lb 6 epis
29. The P ASIC is directly powered by the battery or power adapter voltage VBAT Initially the Fly Back Converter is off and the D ASIC is powered by VBAT via transistor V569 3 V3GAR If the voltage 3V3GAR is below 3 05V the P ASIC keeps its output signal VGARVAL supplied to the D ASIC low and the D ASIC will not start up The test tool is not working and is in the Idle mode If the voltage 3 V3GAR is above 3 05V the P ASIC makes the line VGARVAL high and the D ASIC will start up The test tool is operative now If it is powered by batteries only and not turned on it is in the Off mode In this mode the D ASIC is active the real time clock runs and the ON OFF key is monitored to see if the test tool will be turned on If the power adapter is connected P ASIC output MAINVAL high and or the test tool is turned on the embedded D ASIC program called mask software starts up The mask software checks if valid instrument software is present in the Flash 5 If not the test tool does not start up and the mask software continues running until the test tool is turned off or the power is removed This is called the Mask active mode The mask active mode can also be entered by pressing the and 7 key when turning on the test tool If valid instrument software is present one of the following modes will become active Charge mode The Charge mode is entered when the test tool is powered by the power adapter and is turned o
30. ot pae te Rd 3 20 3 3 4 Digital Circuit and 1 000020 0000000000000000000000501 3 25 Performance VerifiCatiOri uu uu uuu aussi 4 1 4 T InttodUctiOD suite erro eget te eet deg eR HERE 4 3 4 2 Equipment Required For 4 3 43 How VerlEy nier ere HI Dime aene a Lt etn t ters 4 3 4 4 Display and Backlight Test sss 4 4 4 5 Input A and Input B 4 5 4 5 1 Input A and B Base Line Jump Test 4 6 4 5 2 Input A Trigger Sensitivity 4 7 4 5 3 Input A Frequency Response Upper Transition Point Test 4 8 4 5 4 Input A Frequency Measurement Accuracy Test 4 9 4 5 5 Input B Frequency Measurement Accuracy Test 4 10 4 5 6 Input B Frequency Response Upper Transition Point Test 4 10 4 5 7 Input B Trigger Sensitivity Test 4 11 4 5 8 Input and B Trigger Level and Trigger Slope Test 4 12 4 5 9 Input A and B DC Voltage Accuracy Test 4 14 4 5 10 Input A and AC Voltage Accuracy Test 4 16 4 5 11 Input A and B AC Input Coupling
31. zero voltage switched ZVS resonant push pull converter to transform the variable regulated voltage into a high voltage AC output V601 T600 The PWM buck regulator consists of FET V600 V602 L600 C602 and a control circuit in N600 FET V600 is turned on and off by a square wave voltage on the COUT output of N600 pin 14 By changing the duty cycle of this signal the output on C602 provides a variable regulated voltage The turn on edge of the COUT signal is synchronized with each zero detect Outputs AOUT and BOUT of N600 provide complementary drive signals for the push pull FETs V601a b dual FET If V601a conducts the circuit consisting of the primary winding of transformer T600 and C608 will start oscillating at its resonance frequency After half a cycle a zero voltage is detected on pin 9 ZD of N600 V601a will be turned off and V601b is turned on This process goes on each time a zero is detected The secondary current is sensed by R600 R604 and fed back to N600 pin 7 and pin 4 for regulation of the PWM buck regulator output voltage The BACKBRIG signal supplied by the D ASIC provides a pulse width modulated variable duty cycle square wave By changing the duty cycle of this signal the average on resistance of V604 can be changed This will change the secondary current and thus the back light intensity The voltage on the cold side of the lamp is limited by V605 and V603 This limits the emission of Circuit Descript
32. 124 Mechanical Size Weight 2 10 8 divisions of 20 pixels 9 6 divisions of 25 pixels Cold Cathode Fluorescent CCFL via Power Adapter PM8907 10 to 21V DC 5W typical 5 mm jack Rechargeable Ni Cd 4 8V 4 hours with bright backlight 4 25 hours with dimmed backlight 5 hours with test tool off 40 hours with test tool on 9 14 hours with refresh cycle Rechargeable Ni MH 4 8V 6 hours with bright backlight 6 3 hours with dimmed backlight 7 hours with test tool off 60 hours with test tool on 12 19 hours with refresh cycle 0 to 45 C 32 to 113 F 10 20 232 x 115 x 50mm 9 1 x 4 5 x 2 in 1 2 kg 2 5 Ibs including battery pack Interface To Printer To PC 2 6 Environmental Environmental Temperature Operating Storage Humidity Operating 0 to 10 C 32 to 50 F 010 to 30 50 to 86 F 2230 to 40 86 to 104 F 040 to 50 C 104 to 122 F Storage 20 to 60 C 4 to 140 F Altitude Operating Storage Vibration Sinusoidal Shock Fungus Resistance Salt Exposure Electromagnetic Compatibility EMC Emission Immunity Characteristics 2 6 Environmental RS 232 optically isolated supports Epson FX LQ and HP Deskjet Laserjet and Postscript Serial via PM9080 optically isolated RS232 adapter cable optional Parallel via PAC91 optically isolated print adapter cable optional Dump and load settings and data Serial v
33. 5 9 5 6 3 Pulse Adjust 2 1 ener 5 10 5 6 4 Gain DMM Gain Volt nas 5 10 5 6 5 sonuit 5 12 5 6 6 Zero t e E Sa e PE reet 5 12 P 5 13 5 6 8 Capacitance Gain Low High sse 5 14 5 6 9 Capacitance Clamp amp 5 14 5 6 10 Cap citance dte ee ae eee eene 5 15 5 7 Save Calibration Data and 5 15 Contents continued Disassembling the Test Tool cui kn hne ini diner n tni Ron na n aria 6 1 6 1 Introd ction e cdi e acea e eet 6 3 6 2 Disassembling Procedures sse 6 3 6 1 1 Required Tools ettet te ec e edet teer ede ete lanis 6 3 6 2 2 Removing the Battery 6 3 6 2 3 Removing the Ball eene 6 3 6 2 4 Opening the Test Tool sse 6 3 6 2 5 Removing the Uhnit esses 6 5 6 2 6 Removing the Display Assembly 6 6 6 2 7 Removing the Keypad and Keypad Foll 6 6 6 3 Disassembling the Main Unit seen 6 6 6 4 Reassembling the Main PCA Unit sese 6 8 6 5 Reassembling the 6 8 Cor
34. 5500A voltage slowly in 0 1V steps using the 5500A EDIT FIELD function until the test tool is triggered and the traces are shown Verify that the 5500A voltage is between 1 5V and 2 5V when the test tool is triggered To repeat the test start at step 12 Set the 5500A to Standby Press to clear the display Select the following test tool setup Press open the SCOPE INPUTS menu Press to open the TRIGGER menu and choose INPUT SCREEN UPDATE FREE RUN AUTO RANGE gt 15HZ Press to enable the arrow keys for Trigger Level and Slope adjustment e Using 90 select positive slope triggering trigger icon Using 622 set the trigger level to 2 divisions from the screen center For positive slope triggering the trigger level is the top of the trigger icon T Set the 55004 to source 0 4V DC 4 13 123 124 Service Manual 4 14 20 2 22 23 24 25 26 27 28 29 30 31 32 Verify that no trace is shown on the test tool display and that the status line at the display bottom shows Wait B T If the display shows the traces and status Hold B then press to re arm the test tool for a trigger Increase the 5500A voltage slowly in 0 1V steps using the 55004 EDIT FIELD function until the test tool 1s triggered and the traces are shown Verify that the 5500A voltage is between 1 5V and 2 5V when the test tool is triggered To repeat t
35. 7 8 Corrective Maintenance 7 7 5 Miscellaneous Functions 5 Backlight brightness control not correct Check the TP605 BACKBRIG supplied by D ASIC D471 for a 25 kHz 3 3 V pulse signal The duty cycle of the pulses controls the back light brightness The backlight brightness increases with an increasing length of the high pulse Check V604 R604 6 Measure the voltage on the collctro of V605 correct voltage 1 5 V gt 1 5 N600 defect lt 1 5 V secundary circuit defect V606 V603 replace both if one is defective 7 5 2 Fly Back Converter 1 Check the voltages on TP572 5V TP573 3 3V TP574 3 3V TP576 3 3V TP577 30V on the POWER part a more voltages are correct then check the rectifier diodes V561 V564 and coils L562 L567 of the incorrect voltage b Ifnone ofthe voltages is correct then the fly back converter does not run correctly continue at step 2 2 Check 504 VBATT for gt 4 8 3 Check TP552 FLYGATE for a square wave voltage of at least some volts for a correct Fly Back Converter 50 100 kHz z10 Vpp a square wave is present on TP552 may be not the correct value then 1 Check the voltage on N501 pin 55 FLYSENSP For a correct converter this 1s a saw tooth voltage of 50 100 kHz 50 150 mVpp P d Pd 50 150 mV a sawtooth voltage is present on R501 no current or a DC current flows in FET V554 The primary coil or V554 may be defe
36. C 3 Bottom B 4 Bottom C 4 Bottom B 4 Bottom C 4 Bottom A 4 Bottom B 5 Bottom A 4 Bottom A 4 Bottom B 4 Bottom B 4 Bottom C 4 Bottom C 4 Bottom C 4 Bottom C 4 Bottom B 4 Bottom C 3 Bottom C 3 Bottom C 4 Bottom C 4 Bottom 5 C 4 Bottom B 4 Bottom D 3 Top D 3 Top C 4 Top D 4 Top C 4 Top D 4 Bottom D 5 Bottom D 5 Bottom Ordering Code List of Replaceable Parts 8 8 5 Main PCA Parts PCA Location Reference Description Designator C509 C511 C512 C528 C529 C531 C532 C533 C534 C547 C548 C549 C550 C551 C552 C553 C554 C555 C561 C562 C563 C564 C565 C567 C568 C572 C573 C574 C576 C583 C591 C592 C593 C594 CER CAP 5 1206 10 1UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF ALCAP NICHICON 6 3V 20 22UF CER CHIPCAP 25V 20 100NF CHIPCAP X7B 0805 1096 22NF CC 22NF 10 0805 X7R 50V CER CHIPCAP 50V 10 22NF CER CHIPCAP 25V 20 100NF CHIPCAP X7B 0805 10 22NF CHIPCAP X7B 0805 10 22NF CHIPCAP X7B 0805 10 22NF CER CHIP CAP 63V 10 4 7NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIP CAP 63V 5 150PF CER CAP 5 1206 10 1UF ELCAP 10V 20 390UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 35V 20 47 ALCAP SANYO 6 3V 20 150UF SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20 150UF ALCAP SANYO 6 3V 20
37. C19 NDS Yi9 9 aad 5 MENABR 1755 03 819 CHA3 ROMD2 AC18 ROMWRE we amp ADC 02 19 CHA2 ROMD1 18 R427 1427 ADC 01 C18 28160 47 eL 25 2 ADC A Do CHAI ROMDO 2828 Gag CHAO TP473 DATACLK_S DATACLK_R DATACLK 3 ADC_A_D 0 7 NC GROUNDC 214 POWERC RTCXTALO B401 R428 BICKTALO RTCXTALI 1 1 32 768KHZ 47E aL 25 2 TP483 R478 NC RTCXTALI t i 4990 B18 LCDDATAT aay C486 C485 RANDOMIZE anom 1 IH PEKE LCDDATAIO Not placed gt 4 7pF SELEXTCASCREG LCDDATAS E14 LbEXTCASCREG LCDDATAB 16 18 RAMPCLK LCDDATA7 16 PAS TP482 RAMPRESET LCD TP432 431 TP436 TP433 TP438 22pF LCDDATAS amp HO OUT 1 EXTSTARTTBIN LCDDATA4 C15 X453 HO IN cig DIGHO NC 15 LCDDATA3 S DISPON 1p DISPON ne lt BIZ HOLDOEF LCDDATA2 1000 2 8 2 L 9 MS421 4 RAMPCLK I CDDAIA S yis LCDDATAS 4 4 A15 EXTACQTRIG LCDDATA1 ES DATACIK 15 5420 4 HOLDOFF 4 Blt TRIGQUAL LCDDATAO 1814 9 5419 A16 14 LCDDATA3 4 LCDDATAS 4 TRIGDT ALLTRIGEXT1 NC LGDDATAS 2 LGDDATAS MS418 4 TRIGQUALM C15 ALLTRIGEX
38. C506 C507 CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF ALCAP 6 3V 10UF CER CHIPCAP 16V 1096 100NF CER CHIPCAP 50V 1096 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 50V 1096 100NF CER CHIPCAP 25V 20 100NF CER CHIP CAP 63V 5 22PF CER CHIPCAP 25V 20 100NF CER CHIP CAP 50 5 18PF CER CHIP CAP 50V 5 18PF CER CHIP CAP 50V 5 18PF CER CHIP CAP 50V 5 18PF CER CHIP CAP 50V 6 4 7 CHIPCAP NPO 0805 5 100PF CHIPCAP NPO 0805 5 100PF CC 22NF 10 0805 X7R 50V CER CHIP CAP 50 5 180PF CER CHIPCAP 50V 1096 100NF CER CHIPCAP 50V 1096 100NF CER CHIPCAP 50V 1096 100NF 1UF CERCAP Y5V 1206 10 ELCAP 25V 20 180UF ALCAP NICHICON 25V 20 10UF ELCAP 10V 20 390UF ALCAP NICHICON 16V 10UF CER CHIPCAP 25V 20 100NF CER CHIP CAP 25V 20 47 CER CHIPCAP 25V 20 100NF 5322 126 13638 5322 126 13638 4022 101 00011 4022 301 61681 4022 301 61331 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 4022 301 61331 5322 126 13638 5322 122 32658 5322 126 13638 4022 301 60201 4022 301 60201 4022 301 60201 4022 301 60201 4022 301 60131 5322 122 32531 5322 122 32531 4022 301 60491 4022 301 60321 4022 301 61331 4022 301 61331 4022 301 61331 5322 126 14086 5322 124 11843 5322 124 11839 5322 124 11844 5322 124 41979 5322 126 13638 5322 126 14045 5322 126 13638 B 4 Bottom B 4 Bottom D 3 Top
39. CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP TC50 1 100K RC12H 1 681K RC12H 1 681K RC12H 1 178K 50 1 100K TC100 1 133E RC11 2A OE RC12H 1 100E RC12H 1 51K1 50 1 100K RC12H 1 348E RC12H 1 10E RC12H 1 10E RC12H 1 10E RC12H 1 10E RC12H 1 10E TC100 1 5K62 50 1 10K TC100 1 34K8 50 1 10K RC12G 1 21 5 50 1 10 RC12G 1 21 5 50 1 10 50 1 100 RC12H 1 31K6 RC12H 1 34K8 RC12H 1 681K RC12H 1 681K RC12H 1 34K8 RC12H 1 215K RC12H 1 562K RC12H 1 562K Ordering Code 4022 301 22311 5322 117 12458 5322 117 12458 5322 117 12459 4022 301 22311 4022 301 21621 4022 301 21281 4822 117 11373 5322 117 12462 4022 301 22311 5322 117 12456 5322 117 12464 5322 117 12464 5322 117 12464 5322 117 12464 5322 117 12464 4022 301 22011 4022 301 22071 4022 301 22201 4022 301 22071 5322 117 12492 4022 301 22071 5322 117 12492 4022 301 22071 4022 301 22311 5322 117 12466 5322 117 12467 5322 117 12458 5322 117 12458 5322 117 12467 5322 117 12457 5322 117 12468 5322 117 12468 List of Replaceable Parts 8 5 Main PCA Parts PCA Location C 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom D 3 Bottom D 3 Bottom C 3 Bottom C 3 Bottom D 2 Bottom D 3 Bottom C 3 Bottom D 3 Bottom D 2 Bottom C 3 Bottom D 3 Bottom C 2 Bottom B 3 Bottom B 3 Bottom B 3 Bottom B 3 Bottom 3 A 4 Bottom B 3 Bottom B 3 Bottom B 3
40. DC E NORMAL 123 124 Service Manual 10 11 12 Press open SCOPE INPUTS menu Press 53 to open the SCOPE OPTIONS menu and select SCOPE ROLL MODE WAVEFORM MODE NORMAL Apply a 1 kHz square wave to Input A and Input B and change the test tool sensitivity V div to make the complete square wave visible Check TP154 ADC A and TP254 ADC B for the signal shown below Input positive Inpitzero Peine a pa 0 3 to 1 4V 150 mV div Input negative A trace amplitude of 1 division results in 150 mV voltage on TP 154 255 Moving the trace position with a zero input signal results in a TP154 254 voltage of about 0 3V bottom to 1 4V top If the voltages are not correct do steps 6 to 16 if these steps are correct then replace the C ASIC If the voltages are correct the error is most probably caused by the ADC or ADC control continue at step 16 Check TP156 TRIGA and TP256 TRIGB The TRIGA and TRIGB signals must be the inverted input signals with an amplitude of 50 mV per division trace amplitude Moving the trace position with a zero input signal results in a TP156 256 voltage of about 0 4V bottom to 0 4V top If the voltages are not correct do steps 6 to 16 if these steps are correct then replace the C ASIC Check the supply voltages 3V3A 3 3V 3V3A 3 3V and 5VA 5 V If not correct trace to the Fly Back converter on
41. OHM CONT DIODE and CAP with STL120 and black test lead to COM Table 2 3 Multimeter Disturbance lt 1 Disturbance less than 1 of full scale E 3 Vim E 10 Frequency range 10 kHz to 27 MHz VDC VAC VAC DC 500 mV to 1250V 500 mV to 1250V OHM CONT DIODE 500Q to 30 MQ 500Q to 30 MQ CAP 50 nF to 500 uF 50 nF to 500 uF Frequency range 27 MHz to 1 GHz VDC VAC VAC DC 500 mV to 1250V 500 mV to 1250V OHM CONT DIODE 5002 to 30 MQ 5000 to 30 MQ CAP 50 nF to 500 uF 50 nF to 500 uF Test tool ranges not specified in Table 2 3 may have a disturbance of more than 10 of full scale Chapter 3 Circuit Descriptions Title Page 3 1 Tritroduction tr death ec err ptr 3 3 3 2 Block unserer e re 3 3 3 2 1 Channel A Channel B Measurement Circults 3 4 3 2 2 Trigger Circuit ete p ER HH Ree A a 3 4 3 2 3 Digita Circuit sere eee ele ete dee ea tend 3 5 3 2 4 s oit mee eee Hr eee ER ede aaepe 3 6 3 2 5 Start up Sequence Operating Modes 3 7 3 3 Detailed Circuit 3 9 3 3 e reete ee eee eel ee ee ne ee 3 9 3 3 2 Channel A Channel B Measurement Circutts 3 15 3 3 3 CITCUIL n eter eae e er ere tents 3 20 3 3 4 Digital Circu
42. P BATIBENT 67 j MBRS340T3 7 330E 30VD LINEAR gt 3 30 357 2 0573 1504 4 1 C549 SUPPLY C555 EL 0562 L564 150uF TP574 330E R512 100nF 4 1 390uF 150uF 68uH es 3 lt 9563 1 1 1 1 22nF V569 MBRS340T3 4 1 P 49V9A 1234 57 R504 R506 R507 2 87k C548 R580 869 2 0574 6 1E 1E 1E 8509 4 BAT 3 ua 1566 150uF TP567 4 C563 680 22nF 330m 150uF 1 E xdi do L 46 4 C547 TP561 GARVAL 5 V564 _ T 1 gt 3V3A 1245 MBRS1100T3 576 em 1 T 241 L567 150uF 577 M0D 6 MALE 9 0 1uF 22nF _L IN 9 MOD 6 MALE 9 0 L505 pum e N gt ND 5 A 2 V551 V555 C554 C506 J d 4 1 1 1 TuF 47nF 3 8 js 999995 i V550 52VCOIL BYD77D H 85855 p 5925 Y BYD77D BYD77D 10 5200 S 9505 FLYBOOST 47 SNUB a R550 5 2 SS 504 4 amp gt og C561 css2 7 e GNDD EN 100nF 100nF 348 VBATMEAS V554 4 7nF FLYGATE 49 FLYGATE 1 1 2SK974STR 1 501 V504 V506 TP503 L501 ej R601 MBRS340T3 MTD5P06VT4 83uH R503 N501 1 2 3 0 60 OQ0256HP N3 55 FLYSENSP p n TAI VBATSUP FLYSENSP 7 100 100nF MBRS340T3 503 10E C504 R551 390uF 10uF 100m TP5
43. REFATT The REFATT voltage is used for internal calibration of the input A and B overall gain Tracerot Signal The T ASIC generates the TRACEROT signal used by the C ASIC s Control signals TROTRST and TROTCLK are provided by the D ASIC AC DC Relay and Q F Relay Control The Channel A B AC DC relays K171 K271 and the Channel A relay K173 are controlled by the T ASIC output signals ACDCA pin 22 ACDCB pin 23 and OHMA pin 24 SCLK SDAT Signals T ASIC control data e g for trigger source mode edge selection and relay control are provided by the D ASIC via the SCLK and SDAT serial control lines 3 3 4 Digital Circuit and ADC s Refer to the Fluke 123 124 block diagram Figure 3 1 and circuit diagrams in Figure 9 5 Digital Circuit and Figure 9 3 ADC section The Digital part is built up around the D ASIC HS353063 D471A It provides the following functions ADC data acquisition for traces and numerical readings Trigger processing e Pulse width measurements e g for capacitance measurement function Microprocessor Flash EPROM and RAM control Display control e Keyboard control ON OFF control e Miscellaneous functions as PWM signal generation SDA SCL serial data control probe detection Slow ADC control serial RS232 interface control buzzer control etc The D ASIC is permanently powered by the 3V3GAR voltage supplied by the Power Circuit if at least the battery pack is present VR after filter
44. REFERENCE GAIN circuit and T ASIC N301 1 2V 1 2V lt 800 ms 7 5 10 Buzzer Circuit 1 2 3 4 Press ox and select MEASURE on A CONT Short circuit Input A to COM The buzzer is activated now Check TP496 for a 4 kHz 0 3V square wave during beeping 0 V if not activated Check TP495 for a 4 kHz 3 30V square wave during beeping TP495 is 30V if the beeper is not activated 7 15 123 124 Service Manual 7 5 11 Reset ROM Circuit 1 Check TP487 for 3V supplied by D471 7 5 12 RAM Test You can use the Microsoft TERMINAL program to test the RAM Proceed as follows 1 Connect the Test Tool to a PC via the Optical Interface Cable PM9080 2 Start the Terminal program and select the following Settings Terminal Emulation TTY Generic Terminal Preferences Terminal Modes CR gt CR LF Line Wrap Inbound Local Echo L Outbound Sound Communications Baud Rate 9600 Data Bits 8 Stop Bits 1 Parity None Flow Control Xon Xoff Connector COMn 3 Turn the test tool off Keep the keys ep pressed and turn the test tool on again This will start up the mask software You will hear a very weak beep now 4 Inthe terminal program type capital characters X no ENTER After a number of characters the test tool mask software will respond with an acknowledge 0 zero This indicates that the communication between the Terminal program and the test tool is accomplished 5 Type ID and press Enter The test t
45. Scale Reading Move influence True RMS Voltages VAC and Ranges Accuracy for 5 to 10096 of range DC coupled DC to 60 Hz VAC DC 1 Hz to 60 Hz VAC AC or DC coupled 60 Hz to 20 kHz 20 kHz to 1 MHz 1 MHz to 5 MHz 5 MHz to 12 5 MHz 5 MHz to 20 MHz AC coupled with 1 1 shielded test leads 60 Hz 6 Hz with 10 1 probe 50 Hz 5 Hz with 10 1 probe 33 Hz 3 3 Hz with 10 1 probe 10 Hz 1 Hz with 10 1 probe DC Rejection only VAC Common Mode Rejection CMRR Full Scale Reading Move influence Peak Modes Ranges Accuracy Max peak or Min peak Peak to Peak Full Scale Reading Frequency Hz Ranges Frequency Range for Continuous Autoset 2 6 5000 counts 6 counts max 500 mV 5V 50V 500V 1250V 1 10 counts 1 10 counts 2 5 15 counts 5 20 counts 10 25 counts 30 25 counts 30 25 counts excluding test leads or probes 1 5 2 5 30 gt 50 dB gt 100 dB DC gt 60 dB 50 60 or 400 Hz 5000 counts The reading is independent of any signal crest factor 6 counts max Max peak Min peak or pk to pk 500 mV 5V 50V 500V 1250V 5 of full scale 10 of full scale 500 counts 1Hz 10Hz 100Hz 1 kHz 10 kHz 100 kHz 1 MHz 10 MHz and 50 MHz Fluke 123 or 70 MHz Fluke 124 15Hz 1Hz to 50 MHz Accuracy Q1Hz to 1 MHz 21 MHz to 10 MHz 210 MHz to 50 MHz Fluke 123 210 MHz to 70 MHz Fluke 124
46. T CERR2 L lt C233 100k Pos H 1 54 POSB 5 38 2 52 R233 15nF 100k C207 4 47pF R252 470pF K271C T C234 10k N201 MOREM 4 R209 7 0 FB3 OQ0258HP N2 254 2 15k 470pF X100B _______ R201 R202 C201 R203 C236 1k 681k TP252 i 4 4 41 R253 R236 FBA orrser 44 gag 2 24 OFFSET 5 PROBE 487k 487k 22n 1Meg RA D ROBEA C253 R255 681k I 100E 22nF 178k l 39 0 55 r 4 FBC w AC DC R204 EN TP253 K271B 3 42 R261 R256 26 1k DACTEST 24 1 DACTESTB 7 R260 100k C256 100k R237 R238 R239 R240 51 1k 1nF 2 GPROT T 206 C202 C206 562k 56 2k 56 2k 56 2k Input block 400E 100nF 4 7 ADDRESS 23 R241 R243 TP254 1 4 REFATT 4 38 GALSIG R257 2 215 909k ADC AES 9 R242 C242 43 133E MAC PROTGND C245 Co46 R246 28 inf 1 215k MIDADC T c 4 MIDADC B 3 100nF TP256 L 258 29 TRIGGER 262 gt TRIGB 4 0 Not placed R259 lt T cms TRACEROT 14 a 100pF 100E 4 1 44 SDAT 1 4 5 lt 145 8 7 6 5 4 4 3 2 1 Figure 9 2 Circuit Diagram 2 Channel B Circuit 9 4 Circuit Diagrams 9 2 Schematic Diagrams
47. Top MS421 A 4 Top MS422 A 4 Top MS431 A 4 Top MS432 A 4 Top MS433 A 4 Top MS434 A 4 Top MS435 A 4 Top MS436 A 4 Top MS437 A 4 Top MS438 A 4 Top MS439 A 4 Top MS440 A 4 Top MS441 A 4 Top MS442 5 MS443 A 5 Top MS444 A 5 Top MS445 A 5 Top MS453 4 Top MS454 A 4 Top TP151 C3 TP152 B3 Top TP153 3 154 3 156 3 TP251 3 Top TP252 2 253 4 254 3 256 3 3 TP302 3 Top TP303 C 3 Top TP304 C 3 Top TP306 D 4 Top TP307 D 4 Top TP308 C 3 Top TP310 B 3 Top TP311 C 3 Top TP321 C 3 Top TP322 C 3 Top TP331 B 3 Top TP332 B 3 Top TP336 B 3 Top TP338 B 3 Top TP431 B 3 Top TP432 B 3 Top TP433 C 3 Top TP436 B 3 Top TP438 B 3 Top 450 C 4 Top TP451 C 4 Top TP452 C 4 Top TP453 C 4 Top TP454 C 4 Top 455 C 4 Top TP456 C 5 Top TP457 C 4 Top TP471 C 3 472 C 3 Top TP473 B 5 474 C 4 Top 475 C 4 Top TP476 C 4 Top TP477 B 4 Top 478 4 479 C 4 Top 480 C 4 Top 481 C 4 Top TP482 B 4 Top TP483 B 4 Top TP484 C 4 Top TP485 C 4 Top TP486 C 4 Top TP487 B 4 Top 488 C 4 Top 489 C 5 Top 490 C 5 Top TP491 C 5 Top 492 C 5 Top TP493 C 5 TP494 B 4 Top TP495 A 3 Top TP496 A 3 Top TP497 B 4 Top TP498 B 4 Top TP499 B 4 Top TP501 D 5 Top TP502 D 5 Top TP503 D 4 Top TP504 D 5 Top TP521 D 3 Top TP522 D 4 Top TP5
48. a leveled sine wave of 1 2V peak to peak 50 kHz SCOPE output MODE levsin Adjust the amplitude of the sine wave to 6 divisions on the test tool display Set the 5500A to 20 MHz Fluke 123 or 40 MHz Fluke 124 without changing the amplitude Observe the Input A trace check to see if it is 2 4 2 divisions When you are finished set the 5500A to Standby Performance Verification 4 4 5 Input A and Input B Tests Note The lower transition point is tested in Section 4 5 11 4 5 4 Input A Frequency Measurement Accuracy Test Proceed as follows to test the Input A frequency measurement accuracy 1 Connect the test tool to the 5500A as for the previous test see Figure 4 3 2 Select the following test tool setup Press to select auto ranging AUTO in top of display Press to open the INPUT A MEASUREMENTS menu and choose MEASURE on A Hz 3 Set the 55004 to source a leveled sine wave of 600 mV peak to peak SCOPE output MODE levsin 4 Setthe 5500A frequency according to the first test point in Table 4 1 Observe the Input A main reading on the test tool and check to see if it is within the range shown under the appropriate column Continue through the test points 7 When you are finished set the 5500A to Standby Table 4 1 Input A B Frequency Measurement Accuracy Test 5500A output 600 mVpp Input A B Reading 10 MHz 09 88 to 10 12 MHz 40 MHz 38 98 to 41 02 MHz 60 MHz Fluke 124 only 58 48
49. and TP304 are correct D471 may be defective 7 5 15 Randomize Circuit 1 Check TP483 for 0 3V pulses 25 kHz variable duty cycle 2 Check TP482 for 3 0V pulses variable frequency and duty cycle 7 6 Loading Software To load instrument software in the test tool the Fluke 43 123 19x ScopeMeter Loader program V3 0 is required Power the test tool via the power adapter input using the BC190 Power Adapter 7 7 Configuration of CPLD chip D470 The CPLD chip D470 must be programmed after being installed CPLD is present on the Main PCA in the 123 124 ScopeMeter with installed software of version V2 00 and onwards serial numbers approximately DM8250001 and onwards CPLD is a programmable device with solder connections of the Ball Grid Array BGA type CPLD is supplied as a non configured device After the CPLD has been soldered on to the Main PCA it must be configured To configure the ScopeMeter Loader Program must be used and dedicated Loader and Model files This has to be done in an Authorized Fluke Service Centre After configuring it must be checked if if the CPLD configuration was succesfull The function of CPLD is to assure that battery current drain is zero 1 mA after the ScopeMeter has been switched off This current can be checked with a sensitive Digital Voltmeter across R504 R506 R507 0 33 ohms The check must be done 10 times after 123 124 Service Manual power off and every time current should n
50. buffer in the C ASIC via the LF input pin 42 The C ASIC conditions the voltage across Rx to an output voltage of 50 mV div This voltage is supplied to the ADC on the Digital part The ADC data is read and processed by the D ASIC and represented as a numerical reading and a graphical trace in a fixed time base Table 3 4 shows the relation between the reading range Q the trace sensitivity Q div and the current in Rx The selected trace sensitivity determines the C ASIC attenuation gain factor The reading range is only a readout function it does not change the hardware range or the wave form display Table 3 4 Ohms Ranges Trace Sensitivity and Current soa sa swa 500 Sensitivity div 200 2000 20 200 10 To protect the current source from being damaged by a voltage applied to the input a PTC resistor R172 and a protection circuit are provided See Section 3 3 3 Current Source During measuring input voltage measurements gain measurements and zero measurements are done As a result the voltage supplied to the ADC is a multiplexed zero reference reference input voltage signal Capacitance Measurements Channel A The capacitance measurement is based on the equation C x dV Ix dt The unknown capacitor Cx is charged with a constant known current The voltage across Cx increases Circuit Descriptions 3 3 3 Detailed Circuit Descriptions and the time lapse between two
51. calibration data Turn the test tool off WARNING No adapter present Calibration data will not be saved Exit maintenance mode e save the calibration data Press NO The test tool returns to the maintenance mode Then supply the correct adapter input voltage and press to exit and save To exit without saving the calibration data Press YES Chapter 6 Disassembling the Test Tool Title Page Gok AIKOO LELE iu rtr dd TIAE uama u s 6 3 6 2 Disassembling Procedures sse nennen nnns 6 3 61 T Required Tools u uqa ae the rt tare 6 3 6 2 2 Removing the Battery 1 44 41 4 40000 600000000504 6 3 0 2 3 Removing the Bail feiss eee eee eem Pee eee eene 6 3 6 2 4 Opening the Test Tool ener nennen 6 3 6 2 5 Removing the Main Uhnit esses 6 5 6 2 6 Removing the Display Assembly 6 6 6 2 7 Removing the Keypad and Keypad Foll 6 6 6 3 Disassembling the Main Unit essere 6 6 6 4 Reassembling the Main PCA Unit esses 6 8 6 5 Reassembling the Test 6 8 6 1 Disassembling the Test Tool 6 1 Introduction 6 1 Introduction This section provides the required disassembling procedures The printed circuit board removed from the test tool must be adequately protected against damage Warning To avoid electric shock disconnect test leads pr
52. danger that requires correct procedures or practices to prevent personal injury 1 4 Symbols used in this Manual and on Instrument Read the safety information the Users m DOUBLE INSULATION Protection Class Manual Xy Equal potential inputs connected Static sensitive components internally black yellow Live voltage lt A Recycling information Earth Disposal information Conformit Europ enne 1 3 123 124 Service Manual 1 5 Impaired Safety Whenever it 1s likely that safety has been impaired the instrument must be turned off and disconnected from line power The matter should then be referred to qualified technicians Safety 1s likely to be impaired if for example the instrument fails to perform the intended measurements or shows visible damage 1 6 General Safety Information Warning Removing the instrument covers or removing parts except those to which access can be gained by hand is likely to expose live parts and accessible terminals which can be dangerous to life The instrument shall be disconnected from all voltage sources before it is opened Capacitors inside the instrument can hold their charge even if the instrument has been separated from all voltage sources Components which are important for the safety of the instrument may only be replaced by components obtained through your local FLUKE organization These parts are indicated with an asterisk in the List of Repl
53. indicates the presence of the power adapter voltage high present The FREQPS signal pin M3 is also supplied by the P ASIC It is the same signal that controls the Fly Back Converter control voltage FLYGATE The D ASIC measures the frequency in order to detect if the Fly Back Converter is running within specified frequency limits D ASIC Clocks A 32 kHz oscillator runs if the 3V3GAR supply voltage is present so if any power source is present crystal B401 The clock activates the Power On Off control circuit and the instrument s Real Time Clock time and date A 50 MHz oscillator runs if the test tool is ON and or if the power adapter voltage is present B403 A 3 6864 MHz UART oscillator for the serial RS232 communication runs if the 50 MHz oscillator runs B402 Buzzer The Buzzer is directly driven by a 4 kHz square wave from the D ASIC pin T4 via FET V522 Ifthe test tool 1s on the 30VD supply from the Fly Back converter is present and the buzzer sounds loudly If the 30VD 15 not present the buzzer sounds weak e g when the Mask Active mode is entered 3 29 123 124 Service Manual 3 30 Chapter 4 Performance Verification Title Page Introductiott o nr u det eSI DEC ua ya 4 3 4 2 Equipment Required For Verification 4 3 43 TO Verlby atr et eee e err tete tse temi 4 3 4 4 Display and Backlight Test sse 4 4 4 5 Input A and Input TesStfS __
54. keypad Caution To avoid contaminating the keypad contacts and the keypad foil contacts with oil from your fingers do not touch the contacts or wear gloves Contaminated contacts may not cause immediate instrument failure in controlled environments Failures typically show up when contaminated units are operated in humid areas 6 3 Disassembling the Main PCA Unit Referring to Figure 6 3 use the following procedure disassemble the main PCA unit 1 Remove the M2 5 Torx screws items 1 and 8 that secure the main shielding plate item 7 to the main PCA shielding box item 5 2 Pull the shielding plate away from input banana jacks as you rotate the far end upwards and then remove it Remove the power input insulator item 3 and the LED guide piece item 6 4 Remove the M2 5 Torx screws item 2 that secure the PCA to the shielding box Lift the PCA at the screw end approximately 2 cm and pull it away from the input banana jack holes to remove it 6 6 Disassembling the Test Tool 6 3 Disassembling the Main PCA Unit Note Each input banana jacket is provided with a rubber sealing ring Input A B item 9 COM input item 10 Ensure that the rings are present when reassembling the main PCA unit Caution To avoid contaminating the main PCA with oil from your fingers do not touch the contacts or wear gloves A contaminated PCA may not cause immediate instrument failure in controlled environments Failures typ
55. or SECAM see Figure 4 14 line number 262 for NTSC see Figure 4 15 e o3 1540 101 NTSC2621 BMP Figure 4 14 Test Tool Screen for PAL SECAM Figure 4 15 Test Tool Screen for NTSC line line 310 Negative Video 262 Negative Video This is the end of the Performance Verification Procedure 4 27 123 124 Service Manual 4 28 Chapter 5 Calibration Adjustment Title Page S Generalis tede Rr n D eee s 5 3 5 11 Introd ction Sun et ie 5 3 5 1 2 Calibration number and 4 1 40 002 42 040000000000000000000000 5 3 5 1 3 General s u uuu eene ener 5 3 5 2 Equipment Required For Calibration eee 5 4 5 3 Starting Calibration Adjustment sse 5 4 5 4 Contrast Calibration Adjustment 5 6 5 5 Warming Up amp 5 7 5 6 Final Calibration a esses usa enne 5 7 5 6 1 HF Gain Input A amp B ener ener enin 5 7 5 6 2 Delta Gain Trigger Delay Time amp Pulse Adjust Input A 5 9 5 6 3 Pulse Adjust ener 5 10 5 6 4 Gain DMM Gain Volt enne 5 10 5 6 5 Zero v etim a en a re eee Ec a 5 12 56 6 Zero eite erre Dee ee err teet peeing 5 12 2 0 Ohm us eb oae ghetto ab ad rait 5 13 5 6 8 Capac
56. range will be tested in Section 4 5 14 Due to calibrator noise occasionally OL overload can be shown 4 5 10 Input A and B AC Voltage Accuracy Test Warning Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows to test the Input A and B AC Voltage accuracy 1 Connect test tool to the 5500A as for the previous test see Figure 4 5 Performance Verification 4 4 5 Input A and Input B Tests 2 Select the following test tool setup Press to select auto ranging AUTO in top of display Do not press anymore Press 9 to open INPUT A MEASUREMENTS menu and choose MEASURE on A B VAC e Press to open the INPUT B MEASUREMENTS menu and choose INPUT B ON MEASURE on B e Move the Input A and Input B ground level indicated by zero icon to the center grid line Proceed as follows Press E to enable the arrow keys for moving the Input A ground level Press E to enable the arrow keys for moving the Input B ground level Using the G keys move the ground level 3 Using set the Input A and B sensitivity to the first test point in Table 4 3 The corresponding range is shown in the second column of the table 4 Setthe 5500 to source the required AC voltage NORMAL output WA
57. the INPUT A MEASUREMENTS menu and choose MEASURE on VDC Press to open the INPUT B MEASUREMENTS menu and choose INPUT B ON MEASURE on B W VDC Performance Verification 4 4 5 Input A and Input B Tests Using Ec change the time base to select manual time base ranging and lock the time base on 10 ms div Press open the SCOPE INPUTS menu Press E to open the SCOPE OPTIONS menu and choose SCOPE MODE NORMAL WAVEFORM MODE SMOOTH e Move the Input A and Input B ground level indicated by zero icon to the center grid line Proceed as follows Press E to enable the arrow keys for moving the Input A ground level Press 227 to enable the arrow keys for moving the Input B ground level Using G keys move the ground level Using set the Input A and B sensitivity to the first test point in Table 4 2 The corresponding range is shown in the second column of the table Set the 5500A to source the appropriate DC voltage Observe the main reading and check to see if it is within the range shown under the appropriate column Continue through the test points When you are finished set the 5500A to 0 zero Volt and to Standby 4 15 123 124 Service Manual Table 4 2 Volts DC Measurement Verification Points Sensitivity Range 5500A output Input A B DC Reading Oscilloscope REC ME V DC 5 mV div 014 4 to 015 6 100 mV div 298 0 to 302 0 D The 500V and 1250V
58. the key pad and the key pad foil to see if this cures the problem 2 Press key and check ROWO 5 measure spots MS432 MS437 for the signal shown below Fesser 50 ms Ls pulses Release key If no key is pressed the ROW lines are low if a battery is installed if the 123 is powered by the the mains adapter only the lines are alternating pulsing and low 3 Check COLO 3 measure spots MS438 MS441 for a 3 3V level Then press and hold a key and check the matching COL line for the signal shown below Pessiey mue ie us pulses If not correct check the connections from X452 to D471 replace D471 For the ON OFF key see Section 7 5 13 7 5 5 Optical Port Serial RS232 Interface Receive RXD 1 Check the voltage RXDA on TP522 for 200 mV and the voltage RXD on TP527 buffered and amplified RXDA voltage for 3 3V 2 Shine with a lamp in the optical port 522 Check the voltage RXDA on TP522 for 0 0 6V and the voltage RXD on TP527 for 0V M Send TXD 1 Check the voltage on TP521 for 3 3V 2 Press d to open the SAVE amp PRINT menu 3 Press ZZ PRINT SCREEN to start the test tool data output Check the voltage TXD on TP521 for a burst of pulses pulses from 2V to 3 3V The length of the burst and the pulses depends on the selected baud rate 7 5 6 Channel A Channel B Voltage easurements 1 Press to open the SCOPE INPUTS menu and select INPUT A DC NORMAL INPUT B BI
59. to the trigger moment the time dt must be known to position the samples on the correct LCD pixel The TRIGDT signal is a measure for the time between the trigger and the sample moment dt The pulse duration of the TRIGDT signal is approximately 4 48 20 us 3 13 SAMPLES SWEEP 1 dt 4 SAMPLES SWEEP 2 PIXEL EN EN 1 2 3 4 5 6 7 8 9 10 I H 2 13 14 15 16 Figure 3 11 Random Repetitive Sampling Mode Circuit Descriptions 3 3 3 Detailed Circuit Descriptions DACTEST output A frequency detector in the T ASIC monitors the ALLTRIG signal frequency If the frequency is too high to obtain a reliable transmission to the D ASIC the DACTEST output pin 29 will become high The DACTEST signal 15 read by the D ASIC via the slow ADC on the Power part It and indicates that the D ASIC cannot use the ALLTRIG signal e g for qualified triggering Current Source A current source in the T ASIC supplies a DC current to the GENOUT output pin 1 The current is used for resistance and capacitance measurements It is adjustable in decades between 50 nA and 500 uA depending on the measurement range and is derived from an external reference current This reference current is supplied by the REFP reference voltage via R323 and R324 to input REFOHMIN pin 6 The SENSE input signal is the buffered voltage on Input For capacitance measurements it is sup
60. using and verify that the signal will be triggered now The trigger level is indicated by the trigger icon Set the 5500A to source a 25 MHz Fluke 123 or 40 MHz Fluke 124 leveled sine wave of 400 mV peak to peak Adjust the amplitude of the sine wave to 1 5 divisions on the test tool display Verify that the signal is well triggered If it is not press E to enable the up down arrow keys for Trigger Level adjustment adjust the trigger level and verify that the signal will be triggered now Set the 5500A to source a 40 MHz Fluke 123 or 60 MHz Fluke 124 leveled sine wave of 1 8V peak to peak Adjust the amplitude of the sine wave to 4 divisions on the test tool display Verify that the signal is well triggered If it is not press E to enable the up down arrow keys for Trigger Level adjustment adjust the trigger level and verify that the signal will be triggered now When you are finished set the 5500A to Standby 4 5 3 Input A Frequency Response Upper Transition Point Test Proceed as follows to test the Input A frequency response upper transition point l 2 Connect the test tool to the 5500A as for the previous test see Figure 4 3 Select the following test tool setup e Press to select auto ranging AUTO in top of display Do not press EI anymore Using ES change the sensitivity to select manual sensitivity ranging and lock the Input A sensitivity on 200 mV div Set the 5500A to source
61. via BATIDENT BATIDGAR pin B5 for Ni Cd there is 0 between BATIDENT and of battery for Ni MH this is 825 0 Maximum VBAT The P ASIC supplies a current to reference resistor R513 VBATHIGH pin 7 It compares the voltage on R513 to the battery voltage VBAT on pin 3 after being attenuated in the P ASIC The P ASIC limits the voltage VBAT to 7 4V via its internal Control circuit This situation arises in case no battery or a defective battery open is present Charger Converter input current This input current is sensed by R501 The P ASIC supplies a reference current to R514 The P ASIC compares the voltage drop on R501 CHASENSP CHASENSN pin 14 and 15 to the voltage on R514 IMAXCHA pin 6 It limits the input current e g when 123 124 Service Manual loading C503 and C555 just after connecting the power adapter via its internal Control circuit CHAGATE control signal To make the FET conductive its Vgs gate source voltage must be negative For that purpose the CHAGATE voltage must be negative with respect to VCHDRIVE The P ASIC voltage VCHDRIVE also limits the swing of the CHAGATE signal to 13V VCHDRIVE V506 V506 ON VCHDRIVE 13V 1 o 10 Figure 3 4 CHAGATE Control Voltage 3V3GAR Voltage When the test tool is not turned on the Fly Back Converter does not run In this situation the 3 V3GAR voltage for the D ASIC FlashROM and the RAM is supplied via transi
62. voltages on the TRIG A TRIG B line These voltages can be selected as trigger source by the T ASIC 3 2 2 Trigger Circuit The T ASIC selects one of the possible trigger sources TRIG A Input A or TRIG B Input B For TV triggering the selected trigger source signal is processed via the Sync hronization Pulse Separator circuit TVOUT TVSYNC lines Two adjustable trigger levels are supplied by the D ASIC via the PWM FILTERS TRIGLEV 1 and 2 line Depending on the selected trigger conditions source level edge mode the T ASIC generates the final trigger signal TRIGDT which is supplied to the D ASIC Circuit Descriptions 3 2 Block Diagram Note External triggers supplied via the optical interface RXDA line are buffered by the P ASIC and then supplied to the D ASIC RXD signal The TRIG A input is also used for capacitance measurements as described in Section 3 2 1 The T ASIC includes a constant current source for resistance and capacitance measurements The current is supplied via the GENOUT output and the relays to the unknown resistance Rx or capacitance Cx connected to Input A The SENSE signal senses the voltage across Cx and controls a CLAMP circuit in the T ASIC This circuit limits the voltage on Input A at capacitance measurements The protection circuit prevents the T ASIC from being damaged by voltages supplied to the input during resistance or capacitance measurements For probe adju
63. will be calibrated 6 Wait until the display shows Pulse Adj CL 0640 READY When you are finished set the 5500A to Standby 8 Continue at Section 5 6 3 5 9 123 124 Service Manual 5 6 3 Pulse Adjust Input B Proceed as follows to do the Pulse Adjust Input calibration 1 Press select calibration step Pulse Adj B CL 0660 IDLE 2 Connect the test tool to the 5500A as shown in Figure 5 5 FLUKE 5500A CALIBRATOR ST8005 WMF Figure 5 5 5500A Scope Output to Input B 3 Set the 5500A to source a 1V 1 MHz fast rising square wave SCOPE output MODE edge rise time lt 1 ns aberrations lt 2 pp Set the 55004 to operate OPR Press to start the calibration Wait until the display shows Pulse Adj B CL 0660 READY When you are finished set the 5500A to Standby 9 lj gx Continue at Section 5 6 4 5 6 4 Gain DMM Gain Volt Warning Dangerous voltages will be present on the calibration source and connection cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows to do the Gain DMM calibration 1 Press to select the first calibration step in Table 5 3 2 Connect the test tool to the 5500A as shown in Figure 5 6 4 5 6 7 Calibration Adjustment 5 6 Final Calibration FLUKE 5500A CALIBRATOR rd SP 2 lt gt 1 AN 909
64. 02 R554 R552 u 26 1k 10 CHASENSP 15 CHASENSN GNDE R553 ly R502 1 12 CHASENSP GNDF 422k le VADAPTER VCHDRIVE GNDF x vsot 20 VADAPTER ZNMBRS30T3 C501 10 18 58 3V3A P7VCHA VNEG 1 iur P ASIC VBATSUP 27 IMAXELY 2 IMAXFLY E VOUTHI GNDC VOUTHI GNDC R558 R559 L506 2501 GNDC 31 6 5 11k 330E E 2 1 4 VBATHIGH 7 C500 IMAXCHA 6 Mole _ elt TE VADALOW VADALOW GNDO X501 1507 CIR 3 FEM 330E i 8513 R514 R515 43 COSC BNXOG 2 01 26 1k 3 16k 23 7k E uu E 2A 9 wo 42 casa 588 lt 965 9 REE SS an aa up 9 s 7 80 333 2 29 R534 On Da eli ne 1 47k L 5 te 77 cs 1 1 P 3V3SADC 7 CHARGER al 100 563 8564 m 5 eB 100 100k TP529 lt 5 gt A So lt lt lt ale P MAINVAL 5 7 BATCUR 4 48 R528 565 34 8k 1 565 1 24 R535 BC848CLT1 BC848CLT1 7 BATVOLT 51 1k 100k 526 7 9 5 0 C529 TP528 100nF 1 R524 4 PWRONOFF 5 100 4 5 REFPWM2 4 0528 527 22 Hi 5 q 4 R529 e MD e TP522 261k 8527 521 147 500 ___GHARCUR 501 i N
65. 04 to satisfy its specified warm up period For each test point wait for the 55004 to settle Allow the test tool a minimum of 20 minutes to warm up 4 4 Display and Backlight Test Proceed as follows to test the display and the backlight l 2 Bom Press Ko to turn the Test tool on Fluke 123 press ES and verify that the backlight is dimmed Then select maximum backlight brightness again Fluke 124 press ES then press NN Verify that the test tool can be switched between dimmed backlight and maximum brightness with the keys During the tests use maximum brightness for the best visibility Remove the adapter power and verify that the backlight 15 dimmed Apply the adapter power and verify that the backlight brightness is set to maximum Press and hold ES Press and release EZ Release ES The test tool shows the calibration menu in the bottom of the display Do not press E If you did turn the test tool off and and start at 5 Press PREV three times The test tool shows Contrast CL 0100 MANUAL Press CAL The test tool shows a dark display the test pattern as shown in Figure 4 1 may not be visible or hardly visible Observe the display closely and verify that no light pixels are shown Performance Verification 4 4 5 Input A and Input B Tests Figure 4 1 Display Pixel Test Pattern 11 Press The test pattern is removed the test tool shows Contrast CL 0110 MANUA
66. 05 5 1NF CER CHIPCAP 25V 20 100NF CHIPCAP X7R 0805 10 10NF MKT FILM CAP 63 10 100NF CER CAP 2KV 5 33PF CER CAP 5 1206 10 1UF CER CHIPCAP 50V 5 1NF AD CONV AD9280ARSRL AD CONV AD9280ARSRL CPLD XCR3032XL 5CS48C D ASIC SPIDER NC7WZ17 UHS TPS3823 25DBVR 16M FEPROM SST39VF800A 90 4C EK SRAM CY62146VLL 70BAI 8 INP MUX 74HC4051D PEL PE BUZZER PKM13EPP 4002 MUR IR LED PHOTODIODE OP906 OPT OP266A DPDT RELAY ASL 1 5W K B05 DPDT RELAY DSP1 L 1 5V MAT DPDT RELAY ASL 1 5W K B05 5322 126 14045 5322 126 13638 5322 126 14089 5322 126 10511 5322 126 13638 5322 122 34098 5322 121 42386 5322 126 14047 5322 126 14089 4022 301 60411 4022 103 00121 4022 103 00121 4022 103 00111 4022 304 11551 4022 304 11691 4022 304 11701 4022 103 01751 4022 304 11361 5322 209 61483 5322 280 10311 4022 103 01021 5322 130 10777 5322 280 10309 5322 280 10312 5322 280 10309 A 5 Bottom A 4 Bottom A 5 Bottom A 5 Bottom B 5 Bottom B 5 Bottom 5 4 Top 5 Bottom 5 4 Top 84 5 4 Bottom A 4 Top 5 C 4 Bottom A3 Top D 3 Top D 3 Top A 2 Top A 2 Top C 2 Top Reference Description Designator L181 L182 L183 L281 L282 L283 L421 L422 L423 L424 L425 L426 L427 L428 L480 L501 L502 L503 L504 L505 L506 L507 L562 L563 L564 L566 L567 L569 L600 N101 N201 N301 CHIP INDUCT 47UH 10 TDK CHI
67. 071 5322 117 12469 4822 117 11154 4822 051 52611 4822 051 52611 4022 301 22101 5322 117 12471 5322 117 12471 5322 117 12464 5322 117 12472 5322 117 12464 5322 117 12464 5322 117 12471 5322 117 12474 4822 117 11154 5322 117 12476 5322 117 12464 5322 117 12472 5322 117 12471 5322 117 12464 5322 117 12472 4022 301 22071 4022 301 22071 5322 117 12472 4822 117 11154 5322 117 12451 5322 117 12465 4822 051 20106 5322 117 12448 5322 117 12454 B 4 Bottom B 3 Top B 3 Bottom B 3 Top B 3 Bottom A 1 Bottom A 1 Bottom A 3 Bottom A 3 Bottom C 3 Bottom B 3 Bottom C 5 Bottom C 3 Bottom C 3 Bottom C 3 Top C 3 Top B 4 Bottom C 3 Bottom C 3 Top C 3 Top D 3 Bottom D 3 Bottom D 3 Bottom D 3 Bottom D 3 Bottom B 3 3 A 3 Bottom A 4 Bottom A 4 Bottom A 4 Bottom A 3 Bottom A 3 Bottom A 3 Bottom Reference Description Designator R416 R417 R421 R422 R423 R424 R425 R426 R427 R428 R431 R432 R433 R434 R436 R438 R439 R441 R442 R443 R444 R450 R451 R454 R457 R466 R470 R471 R473 R474 R475 R476 R477 R478 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTO
68. 096 100NF CER CHIPCAP 16V 10 100NF CER CHIPCAP 16V 1096 100NF ALCAP 6 3V 10UF CER CHIPCAP 16V 10 100NF CER CHIPCAP 16V 1096 100NF CER CHIPCAP 16V 10 100NF Ordering Code 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 122 32654 5322 122 32287 4022 301 61681 4022 301 61681 5322 122 32268 4022 301 61681 4022 101 00011 4022 301 61681 4022 301 61681 5322 122 32654 4022 301 61681 4022 101 00011 4022 301 61681 5322 126 13638 5322 126 13638 5322 122 32654 5322 122 32654 5322 126 14089 5322 126 10223 5322 126 10223 5322 122 32654 5322 122 32654 5322 122 32287 4022 301 61681 4022 301 61681 4022 301 61681 4022 101 00011 4022 301 61681 4022 301 61681 4022 301 61681 List of Replaceable Parts 8 5 Main PCA Parts PCA Location B 3 Bottom B 3 Bottom C 3 Bottom C 3 Top A 5 Top B 3 Bottom B 3 Bottom B 3 Bottom A 4 Bottom B 3 Bottom B 3 Bottom B 3 Bottom B 3 Bottom A 3 Bottom B 3 Bottom C 3 Top B 3 Bottom B 4 Bottom B 4 Bottom B 4 Bottom C 3 Bottom B 4 Bottom C 4 Bottom C 4 Bottom B 4 Bottom B 4 Bottom C 3 Bottom C 3 Bottom C 3 Bottom C 3 Bottom C 3 Bottom C 3 Bottom C 3 Bottom C 3 Bottom 8 123 124 Service Manual Ordering Code PCA Location Reference Description Designator C463 C464 C465 C466 C470 C471 C472 C473 C474 C475 C477 C478 C479 C480 C481 C482 C483 C484 C485 C487 C488 C489 C490 C491 C492 C493 C500 C501 C502 C503 C504 C505
69. 1 VDDAA i P U LS E R371 VCCSDT b 2 alu VCC5REF VCC3ATR SEPARATOR ANS 1 pr vasa V359 C356 100nF BC868 868 15nF R390 R391 1 464k 1k C399 2 100nF R376 C357 R397 VCC3ATR 22nF 34 8352 Not placed R392 2 ot placei A 5 11k TP308 4 22k RELAY R377 V353 9 VCC3DT BZD27C7V5 i 4 b CONTROL 1 4 ANNE 1E 1 95 4 4 m x PABC848CLT1 1774 12500 R385 R378 2 Reo 3 ds lara 1 2 3 5 6 7 3V3A 4 V354 7 EE rog R399 0E 10E BZD27C7V5 S 1 Not placed 2 4 16 ts Y Y 1 C374 TP322 m ERE R173 placed VCC3REF R322 I SENSE 22 BCV65 4 5 TRIGLEV2 let x b 322 u R381 TP321 681k 1 5nF 4 1250 10E 2 R321 TVSYNC 5VA 156 7 VCC3CML 9 TRIGLEV UNE T Tom R324 C381 C379 C378 C377 C376 COMITER TNNT 681k 1 5nF V171 100nF 100nF 100nF 100nF 100nF R326 R327 L he 171 562k 562k R323 215 4 _ 10 aL REFERENCE 34 8k PEE soa uo REFPWM1 1 G AIN Ri71 TP301 EEADGT cz wuabdzzrtartum R369 348E BCV65 3 gt gt lt lt gt 2 13 3k R393 De ee EFP 6 B VEEATR 2009005 Eq 3V3A 1 2 5 6 AL EFATT 1 2 Sher gt FOSE C313 R301 Q 4 5 1
70. 1 Introduction 3 1 Introduction Section 3 2 describes the functional block diagram shown in Figure 3 1 It provides a quick way to get familiar with the test tool basic build up Section 3 3 describes the principle of operation of the test tool functions in detail on the basis of the circuit diagrams shown in Figures 9 1 to 9 8 For all measurements input signals are applied to the shielded input banana jackets Traces and readings are derived from the same input signal samples So readings are related to the displayed readings 3 2 Block Diagram In the overall block diagram Figure 3 1 the test tool is divided in five main blocks Each block represents a functional part build up around an Application Specific Integrated Circuit ASIC A detailed circuit diagram of each block is shown in Section 9 See Table 3 1 for an overview of the blocks in which the test tool is broken down the main block function the ASIC name and the applicable circuit diagram Table 3 1 Fluke 123 124 Main Blocks ASIC Circuit Diagram CHANNEL A Input A signal V O F conditioning C hannel ASIC OQ0258 Figure 9 1 CHANNEL B Input B signal V conditioning C hannel ASIC OQ0258 Figure 9 2 TRIGGER Trigger selection and conditioning T rigger ASIC OQ0257 Figure 9 4 Current source for resistance capacitance continuity and diode measurements AC DC input coupling and Q F relay control Voltage reference source DIGITAL Analog to Digital Conve
71. 12 R311 C311 R307 1 NC309 NC361 I 22uF 348k 31 6k 100nF 10k TP307 1 d HOLDOFF 55 NC310 NC362 C344 10k NC311 NC363 I l GAINPWM 1 2 C339 NC312 NC364 cai NC325 NC313 NC365 R309 100nF V302 NC326 NC314 NC366 10k 1pF NC327 NC315 NC367 E NC328 NC316 NC368 e R339 NC329 NC317 NC369 NC330 NC318 NC370 LM4041CIM3X 1 2 lt 5 3 5 NC331 NC319 NC371 10k NC332 NC320 NC372 C342 NC333 NC321 NC373 NC334 NC322 NC374 NC335 NC323 NC375 1pF NC336 NC324 NC376 TP338 NC337 NC377 R342 NC378 4 4 TRIGQUAL 5 10k 8 7 6 5 4 4 3 2 1 9 6 Figure 9 4 Circuit Diagram 4 Trigger Circuit Circuit Diagrams 9 2 Schematic Diagrams
72. 150UF CER CHIPCAP 50V 1096 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF 5322 126 14089 5322 126 13638 5322 126 13638 4822 124 80675 5322 126 13638 5322 122 32654 4022 301 60491 4022 301 60491 5322 126 13638 5322 122 32654 5322 122 32654 5322 122 32654 5322 126 10223 5322 126 13638 5322 126 13638 5322 122 33538 5322 126 14089 5322 124 11844 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11842 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 5322 124 11841 4022 301 61331 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 D 5 Bottom A 5 Bottom A 5 Bottom D 4 D 4 Bottom C 4 Bottom C 4 Bottom C 4 Bottom D 4 Bottom D 5 Bottom D 5 Bottom D 4 Bottom D 5 Bottom D 5 Bottom D 5 Bottom C 5 Top A 5 Bottom C 5 Top C 5 Top B 5 5 A 5 Top 5 5 D 5 5 5 5 5 C583 D 4 Bottom C591 C 5 Bottom C 5 Bottom C 5 Bottom B 5 Bottom 123 124 Service Manual Ordering Code PCA Location Reference Description Designator C602 C603 C604 C605 C606 C607 C608 C609 C610 C611 D401 0451 D470 0471 0472 0473 D474 D475 D531 H495 521 H522 K171 K173 K271 CER CHIP CAP 25V 2096 47 CER CHIPCAP 25V 20 100NF CER CAP 5 1206 10 1UF CHIPCAP NPO 08
73. 2 304 10221 5322 130 10674 5322 130 31928 5322 130 63289 2X4 pin DIL B 3 Bottom Transistor shape A 1 Bottom A 1 Bottom A 3 Bottom A 2 Bottom A 2 Bottom C 3 Bottom A 4 Top 4 V403 A 4 Bottom 471 C 4 Top A 3 Bottom D 3 Bottom D 4 Bottom D 4 Bottom D 4 Bottom D 5 Bottom C 5 Bottom C 5 Bottom C 5 Bottom C 5 Bottom C 5 Bottom B 5 Bottom B 5 Bottom D 5 Bottom D 5 Bottom C 5 Bottom D 5 Bottom A 5 Bottom A 5 Bottom A 5 Bottom B 4 Top B 5 Bottom Ordering Code List of Replaceable Parts 8 PCA Location Reference Description Designator LF TRANSISTOR BC858C PEL FLEX PRINT CONNECTOR 15 P FCN FLEX PRINT CONNECTOR 21 P FCN DC POWER JACK 0739 01 010 MALE HEADER 2MM 6 P DBL RT ANG MALE HEADER 7 SNG RT ANG EMI FILTER 50V 10A MUR 8 6 Accessory Replacement Parts Black ground lead for STL120 8 7 Service Tools Power adapter cable to check supply current 4822 130 42513 5322 265 10725 5322 265 10726 4822 267 30431 5322 267 10501 5322 267 10502 5322 156 11139 B 5 Bottom 5322 320 11354 5322 320 11707 8 25 123 124 Service Manual 8 26 Chapter 9 Circuit Diagrams Title Page 9 Introduction soc den Rr 9 1 9 2 Schematic Diagrams e 9 2 9 1 9 1 Introduction This chapter contains all circuit diagrams and PCA drawings of the test tool There are no servicea
74. 2 gg ggg 9090 _ Aegea ze 260 ecelesie po Tie 094 40 ROMDZI 4TE 4 25 2 42 11 6 gt Fag ROMD23 LCDDATA3 S LCDDATAS R 1 75 3 LCDDATAS R477 12 218 Dar 30 ROMD24 ROMAIS 4 ROMD25 R424 L424 6 3V3GAR Me N 2 5 s qe RISE 12 Das 52 ON 9 4 845884819959 2 ATE eL 25 2 5 0478 SO8 SHOOSEIIOT HON YOO SMOH ANT BOSH NSS HOOHES HESS SHON OOOHTINKOOOG 16 4 14 39 ROMD28 LINECLK 8 LINECLK R 179 LINECLK 1000F 470 100nF 59858899223392333989933 1 21 19 1 21 08 99 298 RAR SROCE 6660052228 17 ae 0012 029 L 32222 9969 S886 2 052 3628 ae um m 8 222 CTOPOPOP 222922222225555555005 00000000000000000590009 BOMDIO 18 15 poiga 1 48 ROMD31 47E aL 25 2 F s 9 5 5 21 ROMAZO 9 R443 21 NC ROMD 5851 ROMAISI 15 19 26 ROMCSO0 amp TP497 FRAME S FRAME R 15 ADCCLK NC ROMDS 2 ROMA21 10 RA 3 SMPCLK 4 147 ADC A 07 B20 ADCCLKA ROMD NC cc 28_ lt TP494 R426 L426 ADC_A_D6 RONDS Apia BE OE ATE aL 25 2 ADC A D5 Dio n AA19 TP498 14 wee 1 i 12 ROMRST TP487 ADC_A_D4
75. 20 and 500 or lower termination Press to start the zero calibration of all mV d settings CL0820 CL0835 Wait until the display shows Volt Zero CL 0835 READY Remove the 50 2 terminations from the inputs Continue at Section 5 6 6 5 6 6 Zero Ohm Proceed as follows to do the Zero Ohm calibration 1 2 3 4 5 6 Press 2271 to select calibration adjustment step Zero Ohm CL 0840 IDLE Make a short circuit between the Input A banana socket and the COM input Press I to start the Ohm Zero calibration of all ranges CL 0840 CL 0846 Wait until the display shows the calibration status Zero Ohm CL 0846 READY Remove the Input A to COM short Continue at Section 5 6 7 Calibration Adjustment 5 6 Final Calibration 5 6 7 Gain Ohm Proceed as follows to do the Gain Ohm calibration 1 Press 220 to select calibration adjustment step Gain Ohm CL 0860 IDLE 2 Connect the UUT to the 5500A as shown in Figure 5 8 Notice that the sense leads must be connected directly to the test tool FLUKE 5500A CALIBRATOR ST8003 WMF Figure 5 8 Four wire Ohms calibration connections 3 Set the 55004 to the first test point in Table 5 4 Use the 5500A COMP 2 wire mode for the calibration adjustments up to and including 100 For the higher values the 5500A will turn off the COMP 2 wire mode Set the 5500A to operate OPR Press E to start the calibration Wait until the display shows the calibration st
76. 22 209 15144 5322 209 15144 5322 209 15144 5322 209 15144 5322 209 14851 4822 053 20224 4822 053 20224 4822 050 24874 4822 050 24874 4022 301 22441 5322 117 12448 4022 301 21631 5322 116 40274 4022 301 21281 5322 117 12452 5322 117 12452 4822 051 20106 4822 051 20106 4822 051 20106 4822 051 20106 5322 117 12453 5322 117 12453 5322 117 12454 5322 117 12455 4822 051 20106 5322 117 12454 5322 117 12454 5322 117 12484 5322 117 12485 D 5 Top C 4 Bottom C 4 Bottom C 4 Bottom A 5 Bottom 1 1 Top 2 2 A 2 2 Top 2 Top 1 2 2 Bottom B 2 Bottom B 2 Bottom B 2 Bottom B 2 Bottom B 2 Bottom B 2 Bottom B 2 Bottom B 2 Bottom B 3 Bottom B 2 Bottom B 2 Bottom B 2 Bottom A 2 Bottom A 2 Bottom Reference Description Designator R133 R134 R136 R137 R138 R139 R140 R141 R142 R143 R144 R146 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R165 R171 R172 R173 R182 R184 R186 R188 R189 R201 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12G 196 RC12G 196 RC 02G 1 RC 02H 196 RC 02H 196 R
77. 22uF 10Meg 10Meg 10Meg 10Meg d ae ria vt m VATTN3V3 9 tci maa lt 2456 F 100 10 4JpF 147E 47 NC100 14 R120 SWHFO xt R186 L183 10Meg 12 GNDHFO VAMPPSUP 33 t o ONS lt 5 245 67 C113 R108 C114 117 C116 L 10017 10E 16 tT H HFA ME 4 7pF OE 4JpF 215 4 7 _ 17 34 R189 et mp 15 GNDHF1 VAMPN3V3 H e R125 in 188 yiri 10E Ini 215E I1 102 48 OFF eo 1 4 172 4 7pF 4 7pF 68 1 20 SNDHE2 C188 10E 400E 100nF 0187 122 119 C128 zu 173 lt L 22uF GENOUT 9 M 7pF 464E 4 7pF C131 6 GNDHFS GNDDIG dc DSP L 1 5V 35 30 _ 6124 us 7 FBO VDIGN3V3 C199 K173B F 33pF 33pF voienava 8 Toms L 470pF C132 1Meg 100nF 100nF C183 DSP1 L 1 5V R118 R121 l 37 cg C158 22uF 68 1E 68 1E R132 C ASIC 150pF __ 5 R151 C133 100k Pos H 1 lt 5 38 rgo C182 R133 15nF 100k BRL 47pF R152 C184 10k N101 R109 7 ma 0 FB3 OQ0258HP N2 Risa 2 15k 4 470 X100 _______ R101 R102 C101 R103 C136 1k 681k TP152 w 2136 T 41 FB4 44 pum 7 OFFSET 5 487k 487k 22n 1Meg 4 47 OFFSET MEN lt Ae aL 153 R155 681k 100 22nF 178k l
78. 2441 4022 301 21571 4022 301 22441 4022 302 21761 4022 301 22071 4022 301 22311 4022 301 22071 4022 301 22221 4022 301 21831 4022 301 22311 4022 301 22311 5322 117 12465 5322 117 12465 5322 117 12471 4022 301 22071 5322 117 11759 5322 117 12464 5322 117 12464 4822 117 11151 4822 117 11151 4822 117 11151 4022 301 22071 5322 117 12463 5322 117 12608 5322 117 12448 4022 301 21951 4022 301 22161 4822 117 11373 5322 117 12482 5322 117 12467 5322 117 12617 B 4 Bottom B 4 Bottom C 4 Top C 4 Top C 4 Top C 4 Top C 4 Bottom B 4 Bottom C 4 Bottom C 4 Top B 4 Bottom C 4 Bottom C 4 Bottom A 3 Bottom A 3 Bottom C 4 Bottom B 4 Bottom D 3 Bottom D 4 Bottom D 5 Bottom B 5 Bottom B 5 Bottom B 5 Bottom C 4 Bottom D 5 Bottom D 5 Bottom D 5 Bottom D 5 Bottom D 5 Bottom D 5 Bottom D 3 Bottom D 4 Bottom D 3 Bottom List of Replaceable Parts 8 8 5 Main PCA Parts Designator Code R531 RESISTOR CHIP TC50 196 100K 4022 301 22311 C 4 Bottom R532 SMD RES 100E 1 TC100 0805 4022 301 21591 C 4 Bottom R534 RESISTOR CHIP RC12H 196 1K47 5322 117 12479 D 4 Bottom R535 RESISTOR CHIP RC12H 196 51K1 5322 117 12462 D 4 Bottom R550 RESISTOR CHIP RC12H 1 348 5322 117 12456 D 5 Bottom R551 RESISTOR CHIP LRCO1 5 0 1 5322 117 11759 C 5 Bottom R552 RESISTOR CHIP TC50 1 10K 4022 301 22071 D 5 Bottom R553 RESISTOR CHIP RC12H 1 4K22 5322 117 12476 D 5 Bottom R554 RESISTOR CHIP RC12H 196 26K1 5322 117 12448 D 5 Bottom R558 RESIST
79. 2567 10 1 10uF 5 62k REFATT m VCC3ATR Z BAS VCC3ATR h e 7 18 BIAS C301 GAINREFN GNDDISTR BIAS 24 OHMA V172 VEEDT 100nF REFN GAINREEN AMA 22 he K271A C391 t R305 HEEN Aen 4 1 100nF 1E 10k VCCSREF 61 N301 vocent 20 VCCSDT 1 3 60 VECSREF VOCSDT 25 VCC3DT R271 R395 R396 1 GAINADCT VEEREF 58 OQ0257HP N2 Ta VEEDT BCV65 12 56 We 4 VEERAMP TP302 GAINADCT GNDREF TRICE GNDDT 28 B 10 EFADCB 3 GANADOT GAINADCT TRACEROT p gt TRACEROT 1 2 4 3V3A 1256 10k GAINPWM 56 GAINADCB GNDRDAC 48 VCC3RAMP C392 1 REFADCT GAINE WM ESAME Lard 10uF 4 VEEREF R303 C303 REFADCB eas VEERAMP __ 1 tour 34 8k 100nF REFPWM1 R331 DACTESTT 20 RECTAM 1 1 GAINADCB T cos 1E E 4 R310 ACTESTT 5 7 iib 5 Lod qos is VEECML 100k EFN 12 E amp x0BSSBOPBADBEGSBE EE C333 C398 C397 C396 C394 C393 GouzOrzuzzooirza n 100nF 100nF 100nF 100nF 100nF 00200 0200rf x Oom 4 7 1 T TP332 1pF 8306 C306 3 A A 5 R333 21 5k 100nF 44 5 T 1 GAINREFN 1 2 5 SPAT 10k gt TRIGDT 5 NC351 TP311 NC300 NC352 R308 1 2 5 SCLK NC301 NC353 e w gt 9 NC303 NC3SS VCC3CML NC304 NC356 Fa EFPWM1 5 E ms NC306 NO358 131 D fe es i m R3
80. 26 C 4 Top TP527 D 4 Top 528 C 5 Top TP529 D 5 Top TP531 D 4 Top TP534 C 4 Top TP536 C 4 Top TP537 C 4 Top TP551 C 5 Top TP552 C 5 Top TP561 D 4 Top TP567 C 5 Top TP571 D 4 Top TP572 A 3 Top TP573 B 5 Top TP574 C 5 Top TP577 D 5 Top TP591 C 5 Top TP592 C 5 Top TP593 C 5 Top TP600 B 5 Top TP601 A 5 Top TP602 A 5 Top TP603 A 5 Top TP604 B 4 Top TP605 B 5 Top Circuit Diagrams 9 2 Schematic Diagrams 8 7 6 5 4 3 2 1 105 R110 R182 List e 10 8 lt 5 2345 67 L 2 15k enpatt H 100nF 10E C181 47uH 10uF R111 R112 R113 R114 HR
81. 3 9091 001 1 5 9092 001 0 5 578001 578001 Figure 5 6 Volt Gain Calibration Input Connections 300V Set the 55004 to supply DC voltage to the first calibration point in Table 5 3 Set the 5500A to operate OPR Press E to start the calibration Wait until the display shows calibration status READY Press E to select the next calibration step set the 5500 to the next calibration point and start the calibration Continue through all calibration points of Table 5 3 Set the 5500A to Standby and continue with step 9 Table 5 3 Volt Gain Calibration Points lt 300V 9 Press E to select calibration step Gain DMM CL0814 IDLE 123 124 Service Manual 10 11 12 13 14 15 16 Connect the test tool to the 5500A as shown in Figure 5 7 FLUKE 5500A CALIBRATOR ST8129 WMF Figure 5 7 Volt Gain Calibration Input Connections 500V Set the 5500A to supply DC voltage of 500V Set the 5500A to operate OPR Press EE to start the calibration Gain DMM CL0814 and Gain DMM CL0815 will be calibrated now Wait until the display shows calibration status Gain DMM CL0815 READY Set the 5500A to zero and to Standby Continue at Section 5 6 5 5 6 5 Volt Zero Proceed as follows to do the Volt Zero calibration 1 2 3 4 5 6 Press 227 to select calibration adjustment step Volt Zero CL 0820 IDLE Terminate Input A and Input B with the BB1
82. 303 C306 C311 C312 C313 C314 C317 C321 C322 C331 C332 C333 C337 C339 C342 C344 C356 C357 C376 C377 C378 C379 C381 C382 C391 C392 C393 C394 C395 CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF SANYO 25V 20 10UF SANYO 25V 20 10UF ALCAP NICHICON 6 3V 20 22UF CER CHIP CAP 63V 10 1 5NF CER CHIP CAP 63V 10 1 5NF CER CHIP CAP 63V 0 25PF 4 7PF CER CHIP CAP 63V 5 22PF CER CHIP CAP 63V 0 25 1PF CER CHIP CAP 63V 0 25PF 4 7PF CER CHIP CAP 63V 0 25 1PF CER CHIP CAP 63V 0 25 1PF CER CHIP CAP 63V 5 22PF CER CHIP CAP 63V 10 18NF CHIPCAP X7B 0805 10 22NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF ALCAP NICHICON 16V 10UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIP CAP 25V 2096 47 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 124 11838 5322 124 11838 4822 124 80675 5322 122 31865 5322 122 31865 5322 122 32287 5322 122 32658 5322 122 32447 5322 122 32287 5322 122 32447 5322 122 32447 5322 122 32658 5322 126 14044 5322 122 32654 5322 126 13638 5322 126 13638 5322 126 1
83. 3638 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 124 41979 5322 126 13638 5322 126 13638 5322 126 14045 C 2 Bottom C 2 Bottom D 2 Bottom B 3 Bottom B 3 3 B 3 Bottom B 3 Bottom D 3 Top A 3 Top C 3 Top C 3 Top C 3 Top B 3 Bottom B 4 Bottom B 3 Top B 3 Top B 3 Top B 3 Bottom B 3 Bottom B 3 Bottom B 3 Bottom C 3 Bottom C 3 Bottom B 3 Bottom B 3 Bottom C 3 Bottom C 3 Bottom D 3 Bottom D 3 Top C 3 Bottom C 3 Bottom C 3 Top Reference Description Designator C396 C397 C398 C399 C400 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C415 C416 C431 C432 C433 C434 C436 C438 C439 C441 C442 C451 C452 C453 C455 C456 C457 C458 C460 CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CHIPCAP X7B 0805 10 22NF CER CHIP CAP 63V 0 25PF 4 7PF CER CHIPCAP 16V 10 100NF CER CHIPCAP 16V 10 100NF CER CHIP CAP 63V 5 470PF CER CHIPCAP 16V 1096 100NF ALCAP 6 3V 10UF CER CHIPCAP 16V 1096 100NF CER CHIPCAP 16V 1096 100NF CHIPCAP X7B 0805 10 22NF CER CHIPCAP 16V 10 100NF ALCAP 6 3V 10UF CER CHIPCAP 16V 1096 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CHIPCAP X7B 0805 10 22NF CHIPCAP X7B 0805 10 22NF CER CAP 5 1206 10 1UF CER CHIP CAP 63V 10 4 7NF CER CHIP CAP 63V 10 4 7NF CHIPCAP X7B 0805 10 22NF CHIPCAP X7B 0805 10 22NF CER CHIP CAP 63V 0 25PF 4 7PF CER CHIPCAP 16V 1
84. 40274 4022 301 21281 5322 117 12452 5322 117 12452 4822 051 20106 4822 051 20106 4822 051 20106 4822 051 20106 5322 117 12453 5322 117 12453 5322 117 12454 5322 117 12455 4822 051 20106 5322 117 12454 5322 117 12454 5322 117 12484 5322 117 12485 5322 117 12486 5322 117 12487 4822 051 51001 5322 117 10574 5322 117 10574 5322 117 10574 5322 117 10574 5322 117 12488 5322 117 12489 5322 117 12491 5322 117 12457 4022 301 22311 C 2 Top C 2 Top C 2 Top D 2 Top D 1 Top D 2 Top C 2 Bottom D 2 Bottom D 2 Bottom D 2 Bottom D 2 Bottom D 2 Bottom D 2 Bottom D 2 Bottom D 2 Bottom D 3 Bottom D 2 Bottom D 2 Bottom D 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom D 1 Bottom D 1 Bottom D 1 Bottom D 1 Bottom D 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom Reference Description Designator R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R271 R282 R284 R286 R288 R289 R301 R302 R303 R305 R306 R307 R308 R309 R310 R311 R312 R321 R322 R323 R324 R326 R327 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR
85. 406 ADC 06 407 ADC A D7 i 1 410 ADC B DO 411 B D1 NC412 ADC D2 413 ADC 03 NC414 ADC B D4 NC415 ADC B D5 R416 NC416 ADC D6 5 6 7 330 3V3ADCD 417 ADC B D7 1E C415 R466 1 2 4 5 6 7 T VADER 1E C465 four 8 7 6 5 4 3 2 1 Figure 9 3 Circuit Diagram 3 Analog to Digital Conversion 9 5 123 124 Service Manual 8 7 6 5 4 3 2 1 8354 8356 Ei 8375 1 GENOUT SYNC 12567 5 VCCSREF 261E 261E V356 BC858CLT
86. 5322 126 10511 4822 122 33128 5322 122 32654 5322 126 10511 5322 122 33538 5322 122 32531 5322 126 13638 5322 124 11837 5322 126 13638 5322 124 11837 5322 126 13638 5322 126 13638 5322 124 11837 5322 126 13638 5322 126 13638 5322 126 13638 5322 126 13638 5322 122 32268 5322 121 10616 5322 121 10527 5322 126 14046 5322 124 41979 5322 126 13825 5322 122 32268 5322 122 33082 A 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom B 2 Bottom A 2 Bottom A 2 Top A 2 Bottom A 2 Bottom B 3 Bottom B 2 Bottom B 2 Bottom A 2 Bottom A 3 Top B 2 Bottom B 3 Top B 2 Bottom A 2 Bottom B 3 Top B 2 Bottom A 2 Bottom B 2 Bottom B 2 Bottom A 3 Bottom C 2 Top D 1 Top C 2 Top D 3 Top D 1 Top C 2 Bottom D 2 Top Reference Description Designator C212 C213 C214 C216 C217 C218 C219 C221 C222 C223 C224 C231 C232 C233 C234 C236 C242 C245 C246 C252 C253 C256 C258 C259 C261 C281 C282 C283 C284 C286 C287 C288 CER CAP 1 500 0 25PF 4 7PF CER CAP 1 500V 0 25 4 7PF CER CAP 1 500 0 25 4 7PF CER CAP 1 500 0 25 4 7PF CER CAP 1 500V 2 CER CAP 1 500 0 25PF 4 7PF CER CAP 1 500 0 25 4 7PF CER CAP 1 500V 2 33PF CER CAP 1 500 0 25 4 7PF CER CAP 1 500V 0 25 4 7PF CER CAP 1 500V 2 33PF CER CHIP CAP 63V 0 25PF 0 68PF CER CHIP CAP 63V 0 25PF 4 7PF CER CHIP CAP 63V 5 47 CER CHIP CAP 63V 5 470PF CER CHIP CAP 63V 10 4 7NF CHIPCAP NPO 0805 5 1NF CHIP
87. AMCSL 55 gt ts T RAMCS D475 100nF RAMCER 19 04718 PWM Gras ds RAMBO 4 0 0 1 C465 C491 C433 C438 C441 CHES POWERG RAMAS 001 3 8353063 100nF 100nF 22nF 4 7nF 22nF SSROUNDG RAMA RAMA4 102 Ds BAMDS va 103 Vdd GND CHBO RAMA2 RAMAS RAMAS A4 1 04 5 Vdd GND GROUNDC 3 A5 vos E5 AMDE ASH GND R444 SLOWADC 5 6 106 7 wz vdd erp PROBE4 5 PROBEO RAMAS 9 vor GND 84 SMPCLK BATIDORA PROBE1 RAMAS RAMAT BAHAT 108 ETE Vdd GND sono PROBE2 H4 09 Vdd GND ROW ROWO NC 12 ps 10 1010 11 GND 3 00 71 Rowe ey ROW NC AMMAR von BAMDIZ Vdd GND ROW3 ROW2 RAMA14 4 212 Vot2 RAMD13 Mes GND ROWA ROWS BAMA10 15 13 Vota 14 GND TP471 R473 ROWS pa ROW4 PAMAIO 16 1014 15 GND 83 ROWS RAMAT BAMAIZ 4 15 1015 Vdd GND 3 12 13 RAMA18 D A16 Vdd GND 501 4 sc m BAMATA RAMATS A17 Vdd GND SDAT
88. Bottom B 3 Bottom C 3 Top C 3 Top C 3 Top B 3 Top B 3 Top C 3 Bottom C 3 Top 8 123 124 Service Manual 8 20 Ordering Code PCA Location Reference Description Designator R331 R333 R337 R339 R342 R352 R353 R354 R356 R369 R371 R375 R376 R377 R378 R381 R385 R390 R391 R392 R393 R394 R395 R396 R398 R400 R401 R404 R405 R406 R407 R408 R409 R410 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP 50 1 10K 50 1 10K 50 1 10K 50 1 10K 50 1 10K RC12H 1 5K11 RC12H 1 1K RC 02H 1 261E RC 02H 1 261E TC100 1 13K3 RC12H 1 OE RC12H 1 OE RC12H 1 10E RC12H 1 RC12H 1 10 RC12H 1 10 RC12H 1 OE RC12H 1 464K RC12H 1 41K RC12H 1 4K22 RC12H 1 10E RC12H 1 RC12H 1 OE RC12H 1 10E RC12H 1 50 1 10 50 1 10 RC12H 1 RC12H 1 41K RC12H 1 511E RC12H 1 3K16 RC11 2 10M RC12H 1 26K1 RC12H 1 68E1 4022 301 22071 4022 301 22071 4022 301 22071 4022 301 22071 4022 301 22
89. C Press 22 to start the calibration 10 Wait until the display shows Cap High CL 910 READY 11 Set the 5500A to Standby 12 Continue at Section 5 6 9 5 6 9 Capacitance Clamp amp Zero Proceed as follows to do the Capacitance Clamp Voltage amp Zero calibration l 2 3 Press 2271 to select calibration adjustment step Cap Clamp 0940 10 Remove any input connection from the test tool open inputs Press E to start the calibration The capacitance measurement clamp voltage Cap Clamp CL 0940 and the zero of the capacitance ranges Cap Zero CL 0950 Cap Zero CL 0953 will be calibrated now Wait until the display shows Cap Zero CL 0953 READY Continue at Section 5 6 10 Calibration Adjustment 5 7 Save Calibration Data and Exit 5 6 10 Capacitance Gain Proceed as follows to do the Capacitance Gain calibration Press 227 to select calibration adjustment step Cap Gain CL 0960 IDLE Connect the test tool to the 5500A as shown in Figure 5 9 Section 5 6 8 Set the 5500A to 500 nF Set the 5500A to operate OPR Press to start the calibration Wait until the display shows Cap Gain CL 0960 READY gd O4 DES d Continue at Section 5 7 to save the calibration data 5 7 Save Calibration Data and Exit Proceed as follows to save the calibration data and to exit the Maintenance mode 1 Remove all test leads from the test tool inputs Do NOT turn off the test tool 2 P
90. C 02H 196 RC 02H 196 RC12G 196 RC12G 196 RC12G 196 RC12H 1 RC12H 1 10K 1K 100E 56K2 56K2 56K2 56K2 215K 147K 909K 348E 215K 50 1 100K TC50 1 100K RC12H 1 RC12H 1 RC12H 1 681K 681K 178K 50 1 100K TC100 1 162E RC11 2A OE RC12H 1 RC12H 1 100E 51K1 50 1 100K RC12H 1 RC12H 1 100E 348E PTC THERM DISC 600V 300 500E RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 RC12H 1 348E 10E 10E 10E 10E 10E MTL FILM RST MRS25 1 487K Ordering Code 5322 117 12486 5322 117 12487 4822 051 51001 5322 117 10574 5322 117 10574 5322 117 10574 5322 117 10574 5322 117 12488 5322 117 12489 5322 117 12491 5322 117 12456 5322 117 12457 4022 301 22311 4022 301 22311 5322 117 12485 5322 117 12458 5322 117 12459 4022 301 22311 4022 301 21641 4022 301 21281 4822 117 11373 5322 117 12462 4022 301 22311 4822 117 11373 5322 117 12456 5322 116 40274 5322 117 12456 5322 117 12464 5322 117 12464 5322 117 12464 5322 117 12464 5322 117 12464 4822 050 24874 List of Replaceable Parts 8 5 Main PCA Parts PCA Location A 2 Bottom A 2 Bottom A 2 Bottom A 1 Bottom A 1 Bottom A 1 Bottom A 1 Bottom B 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom A 2 Bottom B 3 Bottom B 3 Bottom B 3 Bottom A 3 Bottom B 2 Bot
91. C502 MAINVAL 1 522 OP906 6 AS H521 5 3V3GAR SFH4872 8 7 6 5 4 4 3 2 1 Figure 9 6 Circuit Diagram 6 Power Circuit 9 8 Circuit Diagrams 9 2 Schematic Diagrams 8 7 6 5 4 3 1 gt 6 SLOW TP591 TP592 TP593 D531 1 MDX 5 SELMUXO H 0 AE 44 BATIDENT 5 6 5 SELMUX1 4 10 11 ex y 14 BATVOLT 44 BATVOLT 6 5 SELMUX2 gt 5 7 15 BATTEMP 54 BATTEMP 6 F 12 4 BATCUR 6 4 1 54 DACTESTA 1 amp DACTESTB xs 4 DACTESTB 2 aa 2 DACTESTT 54 DACTESTT 45 194 LCDTEMP1 gt 54 1 5 C591 C592 Cs94 R591 4HC4051D 100NF 100 100nF 100nH 2 15k 536 ha hes m 24 123456 1 4 32 534 537 1 1 p gt SLOWADC 5 R531 5 SADCLEV V LMC71018IM5X 100k C531 E 22nF 2 R532 4 3V3SADC 6 C532 C533 100E
92. CAP NPO 0805 5 1NF CHIPCAP NPO 0805 5 1NF X7R 0805 1096 15NF CHIPCAP X7B 0805 10 22NF CHIPCAP NPO 0805 5 1NF CER CHIP CAP 63V 5 150PF CHIPCAP NPO 0805 5 100PF CER CHIPCAP 25V 20 100NF ALCAP SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF Ordering Code 5322 122 33082 5322 122 33082 5322 122 33082 5322 122 33082 4822 122 31195 5322 122 33082 5322 122 33082 4822 122 31202 5322 122 33082 5322 122 33082 4822 122 31202 4822 126 12342 5322 122 32287 5322 122 32452 5322 122 32268 5322 126 10223 5322 126 10511 5322 126 10511 5322 126 10511 4822 122 33128 5322 122 32654 5322 126 10511 5322 122 33538 5322 122 32531 5322 126 13638 5322 124 11837 5322 126 13638 5322 124 11837 5322 126 13638 5322 126 13638 5322 124 11837 5322 126 13638 List of Replaceable Parts 8 5 Main PCA Parts PCA Location D 2 Top D 2 Top D 2 Top D 2 Top D 2 Top D 2 Top D 2 Top D 2 Top D 2 Top D 2 Top D 3 Top C 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom C 2 Bottom D 2 Bottom C 2 Bottom C 2 Top C 2 Bottom C 2 Bottom D 3 Bottom C 2 Bottom C 2 Bottom C 2 Bottom C 3 Top D 2 Bottom C 3 Top D 2 Bottom C 2 Bottom D 3 Top D 2 Bottom 8 123 124 Service Manual Ordering Code PCA Location Reference Description Designator C289 C290 C291 C301 C
93. FLUKE 123 124 Industrial ScopeMeter Service Manual 4822 872 05389 February 2003 2003 Fluke Corporation All rights reserved Printed in the Netherlands All product names are trademarks of their respective companies SERVICE CENTERS To locate an authorized service center visit us on the World Wide Web http www fluke com or call Fluke using any of the phone numbers listed below 1 888 993 5853 in U S A and Canada 31 402 675 200 in Europe 1 425 446 5500 from other countries Table of Contents Chapter Title Page Safety Instructions enixe ki on set oO EGO ORE CR GO EX A XR EC 1 1 Vs T Introducti nzi i rrr e n t e 1 3 1 2 Safety Precautioris iiie meer e Rer eee 1 3 1 3 Caution and Warning Statements essen 1 3 1 4 Symbols used in this Manual and on Instrument 1 3 1 5 Impaired Safety niter Pp eti as 1 4 1 6 General Safety Information essen 1 4 Fe ea EE EET 2 1 2 Ar et e ee ot ee tr ueteres 2 3 2 2 Dual Input Oscilloscope sese 2 3 2 2 Mertical ih eer d e tin beca en eter aee nee 2 3 2 2 2 Horizontal uhan huaman ua lasa 2 4 2 4 2 2 4 Advanced Scope 2 5 2 Dual Input Mete
94. L 12 Press CAL The test tool shows the display test pattern shown in Figure 4 1 at default contrast Observe the test pattern closely and verify that the no pixels with abnormal contrast are present in the display pattern squares Also verify that the contrast of the upper left and upper right square of the test pattern are equal 13 Press The test pattern is removed the test tool shows Contrast CL 0120 MANUAL 14 Press CAL The test tool shows a light display the test pattern as shown in Figure 4 1 may not be visible or hardly visible Observe the display closely and verify that no dark pixels are shown 15 Turn the test tool OFF and ON to exit the calibration menu and to return to the normal operating mode 4 5 Input A and Input B Tests Before performing the Input A and Input B tests the test tool must be set in a defined state by performing a RESET Proceed as follows to reset the test tool Press to turn the test tool off e Press and hold e Press and release to turn the test tool on Wait until the test tool has beeped twice and then release When the test tool has beeped twice the RESET was successful For most tests you must turn Input B on Input A is always on Proceed as follows to turn Input B on Press to open the Meter B menu 4 5 123 124 Service Manual e Using 622 select INPUTB Press 227 to confirm the selection th
95. MODEL NUMBER 124 SOFTWARE VERSION 902 00 CALIBRATION HUMBER 4 CALIBRATION DATE 0920522002 REFRESH DATE 09 05 2002 BATTERY BATTERY Back EXIT Figure 5 1 Version amp Calibration Screen VERSION BMP 5 1 3 General Instructions Follow these general instructions for all calibration steps e Allow the 55004 to satisfy its specified warm up period For each calibration point wait for the 5500A to settle e The required warm up period for the test tool is included in the WarmingUp amp PreCal calibration step 5 3 123 124 Service Manual e Ensure that the test tool battery is charged sufficiently 5 2 Equipment Required For Calibration The primary source instrument used in the calibration procedures is the Fluke 5500A If 5500 is not available you can substitute another calibrator as long as it meets the minimum test requirements e Fluke 5500A Multi Product Calibrator including 5500A SC Oscilloscope Calibration Option Stackable Test Leads 4x supplied with the 5500A e 500 Coax Cables 2x Fluke PM9091 or PM9092 e 5000 feed through terminations 2x Fluke PM9585 Fluke BB120 Shielded Banana to Female BNC adapters 2x supplied with the Fluke 123 124 Dual Banana Plug to Female BNC Adapter 1x Fluke PM9081 001 Male BNC to Dual Female BNC Adapter 1x Fluke PM9093 001 5 3 Starting Calibration Adjustment Follow the steps below to start ca
96. OR CHIP RC12H 196 31K6 5322 117 12466 D 5 Bottom R559 RESISTOR CHIP RC12H 196 5K11 5322 117 12469 D 5 Bottom R563 RESISTOR CHIP TC50 196 100K 4022 301 22311 D 5 Bottom R564 RESISTOR CHIP TC50 196 100K 4022 301 22311 D 5 Bottom R565 RESISTOR CHIP TC50 196 100K 4022 301 22311 D 5 Bottom R570 RESISTOR CHIP TC50 196 100K 4022 301 22311 C 5 Bottom R580 RESISTOR CHIP LRCO1 5 5322 117 11725 D 4 Bottom R591 RESISTOR CHIP RC12H 196 2K15 5322 117 12452 B 4 Bottom R600 RESISTOR CHIP RC12H 196 5K11 5322 117 12469 B 5 Bottom R601 RESISTOR CHIP TC100 196 68E1 4022 301 21551 A 5 Bottom R602 RESISTOR CHIP TC50 1 10K 4022 301 22071 B 5 Bottom R603 RESISTOR CHIP TC50 196 100K 4022 301 22311 B 4 Bottom R604 RESISTOR CHIP RC12H 1 1K 4822 117 11154 B 5 Bottom R605 SMD RES 10K 1 TC50 0805 4022 301 22071 A 4 Bottom R606 SMD RES 6K19 1 TC50 0805 4022 301 22021 A 4 Bottom T552 BACKLIGHT TRANSFORMER PT73458 5322 146 10447 C 5 Top T600 SMD TRANSFORMER 678XN 1081 TOK 5322 146 10634 A5 Top 171 PNP NPN TR PAIR BCV65 5322 130 10762 A 3 Bottom V172 PNP NPN TR PAIR BCV65 5322 130 10762 C 3 Bottom V174 PNP NPN TR PAIR BCV65 5322 130 10762 A 3 Bottom 8 23 123 124 Service Manual 8 24 Ordering Code PCA Location Reference Description Designator V301 V302 V353 V354 V356 V358 V359 V395 V401 V402 V403 V471 V495 V501 V503 V504 V506 V550 V551 V554 V555 V561 V562 V563 V564
97. P INDUCT 47UH 10 TDK CHIP INDUCT 47UH 10 TDK CHIP INDUCT 47UH 10 TDK CHIP INDUCT 47UH 10 TDK CHIP INDUCT 47UH 10 TDK FILTER 25MHZ 2012 25 0 FILTER 25MHZ 2012 25 0 FILTER 25MHZ 2012 25 0 FILTER 25MHZ 2012 25 0 FILTER 25MHZ 2012 25 0 FILTER T 25MHZ 2012 25 0 FILTER 25MHZ MEM2012T25RO FILTER T 25MHZ 2012 25 0 CHIP INDUCT 1UH 5 TDK CHOKE 33UH TDK FILTER EMI 330E 0805 MUR FILTER EMI 330E 0805 MUR FILTER EMI 330E 0805 MUR FILTER EMI 330E 0805 MUR FILTER EMI 330E 0805 MUR FILTER EMI 330E 0805 MUR CHIP INDUCT 47UH 10 TDK CHIP INDUCT 47UH 10 TDK FIXED INDUCOR 68UH 10 TDK FIXED INDUCOR 68UH 10 TDK CHIP INDUCT 47UH 10 TDK FIXED INDUCOR 68UH 10 TDK SHIELDED CHOKE 150UH TDK C ASIC 090258 C ASIC 0Q0258 T ASIC 0Q0257 Ordering Code 4822 157 70794 4822 157 70794 4822 157 70794 4822 157 70794 4822 157 70794 4822 157 70794 4022 104 00321 4022 104 00321 4022 104 00321 4022 104 00321 4022 104 00321 4022 104 00321 4022 104 00321 4022 104 00321 5322 157 63648 5322 157 10994 4022 104 00311 4022 104 00311 4022 104 00311 4022 104 00311 4022 104 00311 4022 104 00311 4822 157 70794 4822 157 70794 5322 157 10995 5322 157 10995 4822 157 70794 5322 157 10995 5322 157 10996 5322 209 13141 5322 209 13141 5322 209 13142 List of Replaceable Parts 8 5 Main PCA Parts PCA Location B 3 Bottom Bottom Bottom D 3 Bottom C 3 B
98. R CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12H 1 RC12H 1 RC22H 1 47 RC22H 1 47 RC22H 1 47 RC22H 1 47 RC22H 1 47 22 1 47 RC22H 1 47E RC22H 1 47E RC12H 1 21K5 RC12H 1 147K RC12H 1 147K RC12H 1 147K RC12H 1 26K1 RC12H 1 147K RC12H 1 21K5 TC50 1 21K5 RC12H 1 1K47 TC100 1 147E TC100 1 147E TC50 1 10K TC50 1 10K RC12H 1 250 1 RC12H 1 RC12H 1 OE TC50 1 1M RC12H 1 100E RC12H 1 100E RC112A OE RC112A OE RC112A 50 1 10K Ordering Code 5322 117 12472 5322 117 12472 2322 704 64709 2322 704 64709 2322 704 64709 2322 704 64709 2322 704 64709 2322 704 64709 2322 704 64709 2322 704 64709 5322 117 12477 5322 117 12478 5322 117 12478 5322 117 12478 5322 117 12448 5322 117 12478 5322 117 12477 4022 301 22151 5322 117 12479 4022 301 21631 4022 301 21631 4022 301 22071 4022 301 22071 5322 117 12472 4022 301 21291 5322 117 12472 5322 117 12471 4022 301 22441 4822 117 11373 4822 117 11373 4022 301 21281 4022 301 21281 4022 301 21281 4022 301 22071 List of Replaceable Parts 8 5 Main PCA Parts PCA Location B 5 Bottom A 3 Bottom A 4 Bottom A 4 Bottom A 4 Bottom B 4 Bottom A 4 Bottom A 4 Bottom A 3 Bottom A 4 Bottom B 4 Bottom B 4 Bottom C 4 Bottom C 4 Bottom B 4 Bottom C 4 Bottom B 4 Bottom C 4 Bottom B 4 Bottom B 3 Top B 3 T
99. T2 DATACLK A 5417 4 ALLTRIG Me raat 2 81 ALLTRIGA W13 FHAME S LCDDATA1 14 LCDDATAT 2 POS B D Dia ALLTRIGB FRAME via DISPON LCDDATAO 13 LCDDATAO POSB ZT5K NC H 5353063 DISPON LNEGLK S ASA 5414 R432 0 1 1 LINECLK 11 t LINECLK 2 MS 2 OFFSET B QFFSETED 213 Pwmao RAMD15 FRAME 10 FRAME 5411 R433 CONTR D Big RAMD13 M_ENAB m TRGLEV1D POS RAMDIS RAMD12 LCDTEMP1 LCDTEMP1 6 TRIGLEV lt 1 147 BACKBRIG 012 12 RAMD11 45VA 2 5408 R434 OFFSETAD Bi AMAS 10 3730 3V3D 2 22 ie mana I RE mm ae sm use R438 PWMA7 RAMD8 9 MS403 OFFSETAD Bio NC NC 7 30VD T 9 1 OFFSET A t T POS 10 GROUNDPWM RAMD7 6 t 5401 R439 TRGLEV2D cio DAMDS 5 ZIF_CONN POS A D TRGLEVID PANOG RAMD4 E 1 2 5 PWMATO RAMD4 PAIDA R441 2 7 SADCLEV lt BY5K SADGLEVD 2 BX RAMD1 ad R442 CHARCURD Ba BD aca _ 6 CHARCUR Tak _ SADCLEVD C9 PWMB1 90 BAD C475 C432 C434 C439 C442 ADCCLK B 5 100nF VR 4 6 REFPWM2 100nF 22nF 22nF CHE AAR R
100. Test 4 17 4 5 12 Input A and B Volts Peak Measurements 4 18 4 5 13 Input A and B Phase Measurements Test 4 19 4 5 14 Input and B High Voltage AC DC Accuracy Test 4 20 4 5 15 Resistance Measurements Test sss 4 2 4 5 16 Continuity Function Test 4 22 4 5 17 Diode Test Function Test as 4 23 4 5 18 Capacitance Measurements 4 23 4 5 19 Video Trigger u usu adea estremi atest 4 24 Calibration Adjustment evene e Eee DE 5 1 Scl General re It e RO OT n t a aa 5 3 5 1 1 Introduction e n epe Hie 5 3 5 1 2 Calibration number and 4 2 1 0212 402002 0000000004000 000000000000 5 3 5 1 3 General Instructions eee eret eerte ce 5 3 5 2 Equipment Required For Calibration seen 5 4 5 3 Starting Calibration 5 4 5 4 Contrast Calibration Adjustment 5 6 5 5 Warming Up amp Pre Calibration essen 5 7 56 Final Calibration iet e te eter eee 5 7 5 6 1 HF Gain Input A amp B esses ener ener enne 5 7 5 6 2 Delta Gain Trigger Delay Time amp Pulse Adjust Input A
101. V565 V566 V567 V569 V600 V601 V602 V603 V604 PREC VOLT REF LM4041CIM 1 2 PREC VOLT REF LM4041CIM 1 2 3X VOLT REG DIODE BZD27 C7V5 PEL VOLT REG DIODE BZD27 C7V5 PEL LF TRANSISTOR BC858C PEL LF TRANSISTOR BC868 PEL LF TRANSISTOR BC868 PEL LF TRANSISTOR BC848C PEL N CHAN FET BSN20 PEL P CHAN MOSFET BSS84 PEL N CHAN FET BSN20 PEL SCHOTTKY DIODE BAT74 P CHAN MOSFET BSS84 PEL SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS340T3 MOT POWER TMOS FET MTD5PO6ET4 MOT RECT DIODE BYD77A RECT DIODE BYD77A N CHAN MOSFET 25 9745 HIT RECT DIODE BYD77A SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS340T3 MOT SCHOTTKY DIODE MBRS1100T3 MOT LF TRANSISTOR BC848C PEL LF TRANSISTOR BC848C PEL SCHOTTKY DIODE MBRS340T3 MOT LF TRANSISTOR BC869 PEL TMOS P CH FET MMSF3P03HD MOT TMOS N CH FET 4 SCHOTTKY DIODE MBRS340T3 MOT SIL DIODE BAS16 PEL N CHAN FET BSN20 PEL 5322 209 14852 4022 304 10571 4822 130 82522 4822 130 82522 4822 130 42513 5322 130 61569 5322 130 61569 5322 130 42136 5322 130 63289 5322 130 10669 5322 130 63289 9337 422 90215 5322 130 10669 5322 130 10674 5322 130 10674 5322 130 10674 5322 130 10671 5322 130 10763 5322 130 10763 5322 130 62921 5322 130 10763 5322 130 10674 5322 130 10674 5322 130 10674 5322 130 10675 5322 130 42136 5322 130 42136 5322 130 10674 4822 130 60142 5322 130 10672 402
102. VE sine Observe the Input A and Input B main reading and check to see if it is within the range shown under the appropriate column Continue through the test points When you are finished set the 5500A to Standby Table 4 3 Volts AC Measurement Verification Points Oscilloscope Meter Volts rms Frequency X D The 500V and 1250V range will be tested in Section 4 5 14 4 5 11 Input A and B AC Input Coupling Test Proceed as follows to test the Input A and B AC coupled input lower transition point 1 Connect the test tool to the 5500A as for the previous test see Figure 4 5 2 Select the following test tool setup Use the setup of the previous step AUTO time base traces at vertical center e Using 5 3 select 200 mV div for Input A and B 500 mV range 123 124 Service Manual e Press Eg to open the SCOPE INPUTS menu and choose INPUT A B AC NORMAL INPUT B NORMALI Press open the SCOPE INPUTS menu Press to open the TRIGGER menu and choose INPUT SCREEN UPDATE FREE RUN AUTO RANGE gt 1HZ 3 Setthe 5500A to source an AC voltage to the first test point in Table 4 4 NORMAL output WAVE sine 4 Observe the Input and Input B main reading and check to see if it is within the range shown under the appropriate column Continue through the test points 6 When you are finished set the 5500A to Standby Table 4 4 Input A and B AC Input Coupling Ver
103. aceable Parts Chapter 8 Chapter 2 Characteristics Title Page OTI eo estero bet ete i ME 2 3 2 2 Dual Input Oscilloscope eese ener 2 3 PM MES tH 2 3 2 2 2 Horizontal au m u RHET HERD s 2 4 2 2 3 THEE e eret etd re dere m eee n o 2 4 2 2 4 Advanced Scope Functions esses 2 5 2 3 Dual Input erre er HP eite rete due eu cd eite vens 2 5 2 3 1 Input and Input B 0 000000000000000000000000000000500 2 5 2 32 T 2 8 2 3 3 Advanced Meter 2 9 2 4 Cursor Readout Fluke 124 sse 2 9 25 siti eddie oed 2 9 2 6 Envitonmental et e eet e pet rend 2 11 2 7 Service and Maintenance SS enne nne 2 12 2 12 2 9 EMC Immunity 2 14 2 1 2 1 Introduction Performance Characteristics Characteristics 2 2 1 Introduction FLUKE guarantees the properties expressed in numerical values with the stated tolerance Specified non tolerance numerical values indicate those that could be nominally expected from the mean of a range of identical ScopeMeter test tools Environmental Data The environmental data mentioned in this manual are based on the results of the manufacturer s verification procedures Safety Characteristics The test tool has been designed and t
104. al Generator as shown in Figure 4 8 TV SIGNAL GENERATOR ST8141 WMF Figure 4 8 Test Tool Input A to TV Signal Generator 2 Select the following test tool setup e Reset test tool power off and then on with ES Press to open the SCOPE INPUTS menu Press to open the TRIGGER menu and choose Bl VIDEO on A From the shown VIDEO TRIGGER menu choose SYSTEM NTSC or B PAL SECAM LINE SELECT POLARITY POSITIVE Using WD set the Input A sensitivity to 200 mV div 4 24 Performance Verification 4 4 5 Input A and Input B Tests e Using GES select 20 us div Press F to enable the arrow keys for selecting the video line number Using 622 select the line number 622 for PAL or SECAM 525 for NTSC 3 Set the TV Signal Generator to source a signal with the following properties e the system selected in step 2 e gray scale video amplitude 1V 5 divisions on the test tool e chroma amplitude zero 4 Observe the trace and check to see if the test tool triggers on line number 622 for PAL or SECAM see Figure 4 9 525 for NTSC see Figure 4 10 Note Numerical readings in the pictures shown below may deviate from those shown in the test tool display during verification e VIDE fiz200mU A 20 5 lt CONTRAST PAL622 BMP 5 525 Figure 4 9 Test Tool Screen PAL SECAM Figure 4 10 Test Tool Scr
105. alibration After entering the Warming Up amp Pre Calibration state the display shows WarmingUp CL 0200 IDLE valid or invalid You must always start the Warming Up amp Pre Calibration at Warming Up CL0200 Starting at another step will make the calibration invalid Proceed as follows 1 Remove all input connections from the test tool 2 Press to start the Warming Up amp Pre Calibration The display shows the calibration step in progress and its status The first step is WarmingUp CL0200 BUSY 00 29 59 The warming up period is counted down from 00 29 59 to 00 00 00 Then the other pre calibration steps are performed automatically The procedure takes about 60 minutes 3 Waituntil the display shows End Precal READY 4 Continue at Section 5 6 5 6 Final Calibration You must always start the Final Calibration at the first step of Section 5 6 1 Starting at another step will make the calibration invalid If you proceeded to step N for example step CL 0615 then return to a previous step for example step CL 0613 and then calibrate this step the complete final calibration becomes invalid You must do the final calibration from the beginning step CL 0600 again You can repeat a step that shows the status READY by pressing again 5 6 1 HF Gain Input A amp B Proceed as follows to do the HF Gain Input A amp B calibration 1 Press 27 to select the first calibration step in Table 5 1 HFG amp FI
106. and a PC or printer e enable external triggering using the Isolated Trigger Probe ITP120 The received data line RXDA P ASIC pin 75 is connected to ground via a 20 resistor in the P ASIC If no light is received by the light sensitive diode H522 the RXDA line is 200 mV which corresponds to a 1 3V on the RXD P ASIC output pin 76 line If light is received the light sensitive diode will conduct and the RXDA line goes low 0 0 6V which corresponds to a 0 on the line The level on the RXDA line is compared by a comparator in the P ASIC to a 100 mV level The comparator output is the RXD line which is supplied to the D ASIC for communication and for external triggering The D ASIC controls the transmit data line TXD If the line is low diode H521 will emit light The supply voltage for the optical interface receive circuit RXDA is the 3 V3SADC voltage The 3 V3SADC voltage is present if the test tool is turned on or if the Power Adapter is connected or both So if the Power Adapter is present serial communication is always possible even when the test tool 1s off Backlight Converter Refer to Figure 9 7 The LCD back light is provided by a 22 4 mm fluorescent lamp in LCD unit The back light converter generates the 300 400 Vpp supply voltage The circuit consist of A pulse width modulated PWM buck regulator to generate a variable regulated voltage V600 V602 L600 C602
107. arranged in a 6 rows x 6 columns matrix If a key is pressed the D ASIC drives the rows and senses the columns The ON OFF key is not included in the matrix This key toggles a flip flop in the D ASIC via the ONKEY line D ASIC pin F4 As the D ASIC is permanently powered the flip flop can signal the test tool on off status SDA SCL Serial Bus The unidirectional SDA SCL serial bus pin A2 A3 is used to send control data to the C ASIC s e g change attenuation factor and the T ASIC e g select other trigger source The SDA line transmits the data bursts the SCL line transmits the synchronization clock 1 25 MHz TXD RXD Serial Interface Optical Port The optical interface output is directly connected to the TXD line pin L1 The optical input line is buffered by the P ASIC on the power part The buffered line is supplied to the RXD input pin L2 The serial data communication RS232 is controlled by the D ASIC Slow ADC Control SADC Bus SELMUXO 2 pins 1 4 and SLOWADC pin A4 lines are used for measurements of various analog signals as described in Section 3 3 1 SLOW ADC BATIDENT The BATTIDENT BATIDGAR line pin B5 is connected to R508 on the Power part and to a resistor in the battery pack 0 Q for Ni Cd 825 Q for Ni MH If the battery is removed this is signaled to the D ASIC BATTIDENT line goes high MAINVAL FREQPS The MAINVAL signal pin M2 is supplied by the P ASIC and
108. ations see 2 8 Safety F loating Voltage from any terminal to ground Resolution Vertical Accuracy Max Vertical Move Max Base Line Jump Normal amp Single mode 2 2 2 Horizontal Scope Modes Ranges Normal equivalent sampling Fluke 123 equivalent sampling Fluke 124 real time sampling Single real time Roll real time 600 Vrms up to 400Hz 8 bit 1 0 05 range div 4 divisions After changing time base or sensitivity 0 04 divisions 1 pixel Normal Single Roll 20 ns to 500 ns div 10 ns to 500 ns div 1 us to 5 s div 1 us to 5 s div 1s to 60 s div Sampling Rate for both channels simultaneously Equivalent sampling repetitive signals Real time sampling 1 us to 5 ms div 10 ms to 5 s div Time Base Accuracy Equivalent sampling Real time sampling Glitch Detection Horizontal Move 2 2 3 Trigger Screen Update Source up to 1 25 GS s 25 MS s 5 MS s 0 4 0 04 time div 0 1 0 04 time div 240 ns 20 ns to 5 ms div 2200 ns 10 ms to 60 s div Glitch detection is always active 10 divisions Trigger point can be positioned anywhere across the screen Free Run On Trigger A B EXT EXTernal via optically isolated trigger probe ITP120 optional accessory Sensitivity A and B Fluke 123 DC to 5 MHz 25 MHz 40 MHz Sensitivity A and B Fluke 124 DC to 5 MHz 40 MHz 60 MHz Voltage level e
109. atus READY Press E to select the next calibration step set the 5500A to the next calibration point and start the calibration Continue through all calibration points When you are finished set the 5500A to Standby 9 Continue at Section 5 6 8 Table 5 4 Ohm Gain Calibration Points Cal Step Input Value Gain Ohm CL 0860 Cap Pos CL 0920 Cap Neg CL 0921 Gain Ohm CL 0861 CL 0922 CL 0923 Gain Ohm CL 0862 Pos CL 0924 CL 0925 P The capacitance measurement current calibrations Cap Pos and Cap Neg are done automatically after the Gain Ohm calibration The Gain Ohm CL0866 calibration step is done automatically after the Gain Ohm CL0865 calibration 5 13 123 124 Service Manual 5 6 8 Capacitance Gain Low and High Proceed as follows to do the Capacitance Gain calibration l 2 3 4 5 6 7 8 9 Press 227 to select calibration adjustment step Cap Low CL 0900 1DLE Connect the test tool to the 5500A as shown in Figure 5 9 FLUKE 5500A CALIBRATOR ST8002 WMF Figure 5 9 Capacitance Gain Calibration Input Connections Set the 5500A to supply 250 mV DC Set the 5500A to operate OPR Press to start the calibration Wait until the display shows Cap Low CL 0900 READY Press to select calibration adjustment step Cap High CL 0910 IDLE Set the 55004 to supply 50 mV D
110. ble parts on the LCD unit Therefore no circuit diagrams and drawings of the LCD unit are provided Referring signals from one place to another in the circuit diagrams is done in the following way SIGNAL 5 SIGNAL 1 Figure 9 1 Circuit Diagram 1 Figure 9 5 Circuit diagram 5 The line SIGNAL on circuit diagram 1 1 is connected to the line SIGNAL on circuit diagram 5 5 If the signal is referred to a location on the same circuit diagram the circuit diagram number is omitted 9 1 123 124 Service Manual 9 2 Schematic Diagrams Where to find parts on the Main assembly drawings 18 listed for each component in the last column of the List of Main PCA parts in Chapter 8 5 For each component the location e g C 4 is given and also if the component is located on the Top Side of the PCA or on the Bottom Side On the Top Side the large components are located on the Bottom Side the Surface Mounted Devices SMD s IB402 C4 Top indicates that part 402 can be found in location C4 on the Main PCA Top Side 1 drawing Measuring points are all on the Top Side of the Main PCA and are listed below 9 2 MS401 A 3 Top MS402 A 3 Top MS403 A 3 Top MS404 A 3 Top 5405 3 Top 5406 3 5408 3 5409 3 MS410 A 3 Top MS411 A 3 Top MS412 A 3 Top MS413 A 3 Top MS414 A 3 Top MS415 A 3 Top MS416 A 3 Top MS417 A 3 Top MS418 A 3 Top MS419 A 4 Top MS420 A 4
111. ce Manual Reference Voltage Circuit This circuit derives several reference voltages from the 1 23V main reference source 43 V REFPWVe 73 lt i 1 23V 3 3V 1 23V 0 1V 1 6V Figure 3 12 Reference Voltage Section The output of an amplifier in the P ASIC supplies a current to the 1 23V reference source V301 via R307 The 3 3V REFPWM2 voltage is used as reference for the PWMB outputs of the D ASIC on the Digital part The 1 23V REFP voltage is used as main reference source for the reference circuit This circuit consists of four amplifiers in the T ASIC external gain resistors and filter capacitors Amplifier 1 and connected resistors supply REFPWMI reference voltage This voltage is a reference for the PWMA outputs of the D ASIC on the Digital section It is also used as reference voltage for the LCD supply on the LCD unit Amplifier 2 and connected resistors supply the 1 23V REFN reference voltage used for the trigger level voltages TRIGLEV1 amp 2 the C ASIC POS A and POS B voltages and the C ASIC OFFSET A and OFFSET B voltages REFN is also the input reference for amplifiers 3 and 4 3 24 Circuit Descriptions 3 3 3 Detailed Circuit Descriptions Amplifier 3 and 4 and connected resistors supply the REFADCT and REFADCB reference voltages for the ADC s Both voltages directly influence the gain accuracy of the ADC s The T ASIC can select some of the reference voltages to be output to pin 8
112. ce mode the test tool display shows Warming Up CL 0200 IDLE valid Do not press now If you did turn the test tool off and on and enter the Maintenance mode again Proceed as follows to adjust the maximum display darkness CL0100 the default contrast CL0110 and the maximum display brightness CL0120 1 10 5 6 Press a three times to select the first calibration step The display shows Contrast CL 0100 MANUAL Press CAL The display will show a dark test pattern see Figure 5 2 Using adjust the display to the maximum darkness at which the test pattern is only just visible Press Z to select the default contrast calibration The display shows Contrast CL 0110 MANUAL Press lJ CAL The display shows the test pattern at default contrast Using G amp set the display to optimal becomes default contrast Press Z to select maximum brightness calibration The display shows Contrast CL 0120 MANUAL Press lJ CAL The display shows bright test pattern Using adjust the display to the maximum brightness at which the test pattern is only just visible You can now Exit if only the Contrast had to be adjusted Continue at Section 5 7 OR Dothe complete calibration Press to select the next step Warming Up and continue at Section 5 5 Figure 5 2 Display Test Pattern Calibration Adjustment 5 5 Warming Up amp Pre Calibration 5 5 Warming Up amp Pre C
113. ctive or interrupted connections Check R504 R506 R507 battery current sense resistors these resistors may be fused due to a short in FET V554 b Ifanincorrect sawtooth is present on R501 this can be caused by overloaded outputs Frequency low e g 50 kHz 250 mVpp underloaded outputs Frequency high e g gt gt 100 kHz 100 mVpp bad FET V554 Sawtooth voltage 15 not linear 2 Check R570 and VCOIL connections b NoFLYGATE square wave is present Check TP526 FREQPS for a 50 100 kHz 3 3 Vpp square wave If no square wave on TP526 then go to step 4 4 Check TP528 PWRONOFF for If not correct see Section 7 5 13 Power ON OFF 7 9 123 124 Service Manual 5 Check N501 pin 43 COSC for a triangle waveform 50 100 kHz 1 6V to 3 2V If not correct check C553 and connections check IREF see step 6 If all correct replace N501 6 Check N501 pin 74 IREF for 1 6V If not correct a Check N501 pin 73 REFPWM2 for 3V3 REFPWM2 is supplied by N501 and derived from REFP on the reference circuit on the Trigger part Check TP307 N501 pin 72 REFP for 1 22V If not correct check V301 R307 b Check R528 loose pin 74 or N501 defective 7 Check N501 pin 51 VOUTHI for lt 2 5V nominal value 1 65V If not correct check R558 and connections to N501 check IREF see step 6 8 Check N501 pin 57 IMAXFLY for z250 mV If not correct check R559 and connections to N501 check IREF see step 6
114. data for the first column Data nibbles 4 bit are supplied via lines LCDATO LCDAT3 During 20 data clock pulses DATACLKO the driver for Y161 240 is filled When it is full it generates a carry to enable the driver above it which is filled now When a column is full the LINECLK signal transfers the data to the column driver outputs Via the common drivers the LINECLK also selects the next column to be filled So after 240 column clocks a full screen image is built up on the LCD The LCD unit generates various voltage levels for the LCD drivers outputs to drive the LCD The various levels are supplied to the driver outputs depending on the supplied data and the M ultiplex signal The M signal back plane modulation is used by the LCD drivers to supply the various DC voltages in such an order that the average voltage does not contain a DC component A DC component in the LCD drive voltage may cause memory effects in the LCD The LCD contrast is controlled by the CONTRAST voltage This voltage is controlled by the D ASIC which supplies a PWM signal pin B12 CONTR D to PWM filter R436 C436 The voltage REFPWM1 is used as bias voltage for the contrast adjustment circuit on the LCD unit To compensate for contrast variations due to temperature variations a temperature dependent resistor is mounted in the LCD unit It is connected to the LCDTEMPI line The resistance change which represents the LCD temperature is measured by the D ASIC via th
115. different known threshold crossings is measured Thus dV I and dt are known and the capacitance can be calculated The unknown capacitance Cx is connected to the red Input A safety banana socket and the black COM input The T ASIC supplies a constant current to Cx via relay contacts K173 and protection PTC resistor R172 The voltage on Cx is supplied to two comparators in the C ASIC via the LF input The threshold levels th and the comparators are fixed see Figure 3 9 The time lapse between the first and the second threshold crossing depends on the value of Cx The resulting pulse 15 supplied to the TRIGGER output pin 29 which is connected to the analog trigger input of the T ASIC TRIG A signal The T ASIC adjusts the pulse to an appropriate level and supplies it to the D ASIC via its ALLTRIG output The pulse width is measured and processed by the D ASIC and represented on the LCD as numerical reading There will be no trace displayed pos clamp active th2 neg clamp active TRIG A Figure 3 9 Capacitance Measurement The T ASIC supplies a positive charge and negative discharge current measurement cycle starts from a discharged situation U cx 0 with a charge current After reaching the first threshold level the pulse width measurement is started The dead zone between start of charge and start of pulse width measurement avoids measurement erro
116. e base 10 ms div clock signal 3 3V Check SMPCLK B on both sides of R339 To test video trigger press Em to select the SCOPE INPUTS menu Press E to select the TRIGGER menu and select INPUT VIDEO on A From the VIDEO TRIGGER submenu select SYSTEM PAL LINE RANDOM POLARITY POSITIVE Press to open the SCOPE INPUTS menu Corrective Maintenance 7 7 5 Miscellaneous Functions Press to open the SCOPE OPTIONS menu and select SCOPE MODE NORMAL WAVEFORM MODE NORMAL Supply a 15 6 kHz square wave of 20V 10 10V to Input A and Input B Check a TP308 TVOUT for 15 6 kHz 0 8 0 6 pulse square wave bursts see figure below ga 5 6 kHz L600 ms If not correct N301 may be defective b TVSYNC on R392 R397 for 15 6 kHz 2 6 3 3V pulse bursts If not correct V395 may be defective c TP311 ALLTRIG for 15 6 kHz 3 3 0V pulse bursts If not correct N301 may be defective d TP433 TRIGDT for 0 3 3 pulses If not correct TRIGQUAL may be not correct e TP338 TRIGQUAL for 0 0 6V pulses width 70 us frequency about 2 kHz If not correct 0471 may be defective 7 5 9 Reference Voltages l Check a TP306 for 3 3V TP307 for 1 23V If not correct check replace V301 R307 C3112 P ASIC 501 b TP301 for 42V TP303 for 1 23V TP302 for 0 4V TP304 for 3 3V TP310 see figure below in ROLL mode TP310 is zero If not correct check replace
117. e Input A and B main reading V DC and secondary reading V AC and check to see if it is within the range shown under the appropriate column Continue through the test points When you are finished set the 5500A Standby Table 4 7 V DC and V AC High Voltage Verification Tests Sensitivity Range 5500A 5500A Main DC Secondary AC Scope Meter output Vrms Frequency Reading A B Reading A B 494 0 to 506 0 ww 956654 mw e senem _ ww pwmeaxe o ec esos s swwwm 4 5 15 Resistance Measurements Test Proceed as follows 1 Connect the test tool to the 5500A as shown in Figure 4 7 FLUKE 5500A CALIBRATOR ST8003 WMF Figure 4 7 Test Tool Input A to 5500A Normal Output 4 Wire 4 21 123 124 Service Manual 2 Select the following test tool setup Press to select auto ranging AUTO in top of display Press 15 to open the INPUT A MEASUREMENTS menu and choose MEASURE on A W OHM Q 3 Setthe 55004 to the first test point in Table 4 8 Use the 5500A 2 wire mode for the verifications up to and including 50 kO For the higher values the 5500A will turn off the COMP 2 wire mode 4 Observe the Input main reading and check to see if it is within the range shown under the appropriate column Continue through the test points 6 When you are finished set the 5500A to Standby Table 4 8 Resistance Measurement Verifica
118. e S ADC on the POWER part The back light lamp is located at the left side of the LCD so this side becomes warmer than the right side As a result the contrast changes from left to right To eliminate this unwanted effect the CONTRAST control voltage is increased during building up a screen image FRAME pulse starts the new screen image The FRAME pulse is also used to discharge C404 After the FRAME pulse the voltage on C404 increases during building up a sreen image PWM Signals The D ASIC generates various pulse signals by alternately connecting an output port to a reference voltage REFPWMI or REFPWM2 and ground level with software controllable duty cycle pins B13 C9 The duty cycle of the pulses 1s controlled by the software By filtering the pulses in low pass filters RC software controlled DC voltages are generated The voltages are used for various control purposes as shown in Table 3 6 Table 3 6 D ASIC PWM Signals HORNDM RNDM HOLDOFF randomize control randomize control R487 of RANDOMIZE circuit of RANDOMIZE circuit REFPWM1 TRGLEV1D Trigger level control T ASIC REFPWM1 ENTM POS AD POS BD AD POS BD Channel Channel position control control 2 ASIC REFPWM1 OFFSETAD Channel A B offset control C ASIC REFPWM1 OFFSETBD 3 28 Circuit Descriptions 3 3 3 Detailed Circuit Descriptions Keyboard Control ON OFF Control The keys are
119. e a top case that has the tubes installed and you re install the unit s original display assembly Reassembling procedure for a completely disassembled unit 1 Clean the inside of the lens with a moist soft cloth if necessary Keep the lens free of dust and grease 2 Install the keypad Press the edge of the keypad into the sealing groove of the top case Ensure that the keypad lays flat in the top case and that all keys are correctly seated 3 Install the shielding foil item 2 Remove the protection foil from the shielding foil by pulling it off in one rapid movement If you pull it off slowly the protection foil may crack Keep the shielding foil free of dust and grease 4 Install the dust seal item 3 Install the display shielding bracket item 5 provided with the conductive foam strip item 4 Note Figure 6 4 shows how the shielding bracket with conductive foam strip the shielding foil the dust seal and the display assembly see step 7 are clamped in the top cover edge 6 Install the keypad foil Align the positioning holes in the keypad foil to the positioning pins in the top case 6 8 10 11 Disassembling the Test Tool 6 5 Reassembling the Test Tool Clean the display glass with a moist soft cloth if necessary Install the display assembly Ensure that the display 18 secured correctly by the four alignment tabs in the top case It is secured correctly when it cannot be moved horizontally In
120. e mark changes to The active setting from the next item group will be highlighted for example and maintained after leaving the menu Press 27 exit the menu During verification you must open menus and to choose items from the menu Proceed as follows to make choices in a menu see Figure 4 2 e Open the menu for example press Em Press 65 C to highlight the item to be selected a menu Press E to confirm the selection and to jump to the next item group if present Item groups in a menu are separated by a vertical line After pressing EH in the last menu item group the menu is closed ES 3 jo lt N B A amp amp 2 gt 0 GEE A8 0 2 amp amp S AB S AK 19 Figure 4 2 Menu selection ST7968 WMF If an item is selected it is marked by Not selected items are marked Ifa selected item is highlighted an then is pressed the item remains selected You can also navigate through the menu using 90 To conform the highlighted item you must press E 4 5 1 Input A and B Base Line Jump Test 4 6 Proceed as follows to check the Input A and Input B base line jump 1 Short circuit the Input A and the Input B shielded banana sockets of the test tool Use the BB120 banana to BNC adapter and 500 or lower BNC term
121. e to the test tool hardware are identified by incrementing the revision number of the Main PCA The revision number is printed on a sticker see the example below The sticker is placed on D ASIC D471 on the Main PCA This example of the revision number sticker indicates revision 1 The following revisions have been released Revision 08 Revision number of first deliveries 10 1 123 124 Service Manual 10 2
122. ecked at TP471 SCLK and TP472 SDAT 16 Check SMPCLK A D401 15 and SMPCLK B D451 15 for a 5 MHz time base gt 10 ms div or 25 MHz clock signal 3 3V Check SMPCLK N301 38 for a 5MHz or 25 MHz clock signal of 0 6V 17 Check TP301 REFADCT for 42V and TP302 REFADCB for 0 45V 18 Check the ADC supply voltages 3V3ADCA D401 28 D451 28 and 3V3ADCD D401 2 D451 2 for 3 3V 7 5 7 Channel A Ohms and Capacitance Measurements l Press res and select MEASURE A OHMQ Connect a current meter between Input A and the COM input Select the various Ohms ranges and verify that the current approximately matches the values listed in the table below If not correct the protection circuit or the current source in the T ASIC N301 may be defective If the current is correct and the Volt function is correct so ADC is correct then the Ohms part in the C ASIC is defective replace N101 D 50 Q range for CONTINUITY only 7 13 123 124 Service Manual 2 Press and select MEASURE A B Verify TP156 for 0 3 pulses repetition rate 100 200 ms Zero scale open input pulse width approximately 30 48 Full scale for example 500 nF pulse width approximately 25 ms If not correct most probably the C ASIC 101 is defective If correct continue at Section 7 5 8 Trigger functions pulse width is measured via the T ASIC 7 5 8 Trigger Functions 1 2 VHzA Press 9 6 and sel
123. ect MEASURE A VDC Press a and select INPUT A W DC NORMAL INPUT B B Dc NORMAL Press to select the SCOPE INPUTS menu Press to select the TRIGGER menu and select INPUT or B SCREEN UPDATE FREE RUN AUTO RANGE lll gt 15HZ Press E to open the SCOPE INPUTS menu Press 53 to open the SCOPE OPTIONS menu and select SCOPE MODE NORMAL WAVEFORM MODE NORMAL Supply 1 kHz sine wave of 3 divisions to Input and Input B Check a 156 TP256 for 600 mV 6 div x 100 mV div 1 kHz sine wave the DC level depends on the trace position If not correct C ASIC N101 N102 is probably defective b TP321 TP322 for 1 1 1 9V DC move the trigger level from top to bottom If not correct check the PWM circuit see Section 7 5 8 TP3llfor a 0 3 3 1 kHz square wave when the trigger level is at the middle of the trace Change the trigger level and verify that the duty cycle of the square wave changes If not correct T ASIC N301 may be defective d TP433 TRIGDT for 0 3 3 pulses Pulse width 4 10 us for time base 2 us div and faster 740 us for time base 5 us div and slower pulse width increases with time base e TP336 for 0 6 0V pulses TP436 for 3 3 0V pulses the pulse width is about 40 us 10 ms If not correct check the RANDOMIZE circuit see Section 7 5 15 f 5 N301 38 for a 5 MHz time base gt 10 ms div or 25 MHz tim
124. ed as follows to test the Input A amp B High Voltage AC and DC Accuracy 1 Connect test tool to the 5500A as shown in Figure 4 6 FLUKE 5500A CALIBRATOR ST8129 WMF Figure 4 6 Test Tool Input to 5500A Normal Output for gt 300V 2 Select the following test tool setup e Press to select auto ranging AUTO in top of display Do not press EC anymore VHzA e Press 8 to open the INPUT A MEASUREMENTS menu and choose MEASURE on VAC VHzA e Press 8 open the INPUT A MEASUREMENTS menu and choose MEASURE on HVDC VDC becomes main reading VAC secondary reading e Press to open the INPUT B MEASUREMENTS menu and choose INPUT B ON MEASURE on B e Press LE to open the INPUT B MEASUREMENTS menu and choose INPUT B ON MEASURE on B VDC Move the Input A and Input B ground level indicated by zero icon to the center grid line Proceed as follows Press E to enable the arrow keys for moving the Input A ground level Press Z to enable the arrow keys for moving the Input B ground level Using the keys move the ground level 4 20 Performance Verification 4 4 5 Input A and Input B Tests 3 Using set the Input A and B sensitivity to the first test point in Table 4 7 The corresponding range is shown in the second column of the table 4 Setthe 5500 to source the required AC voltage NORMAL output WAVE sine Observe th
125. een for NTSC line line 622 525 5 Using 622 C2 select the line number 310 for PAL or SECAM 262 for NTSC 6 Observe the trace and check to see if the test tool triggers on line number 310 for PAL or SECAM see Figure 4 11 line number 262 for NTSC see Figure 4 12 4 25 123 124 Service Manual 5804 PAL310 BMP NTSC262 BMP Figure 4 11 Test Tool Screen for PAL SECAM Figure 4 12 Test Tool Screen for NTSC line line 310 262 7 Apply the inverted TV Signal Generator signal to the test tool You can invert the signal by using a Banana Plug to BNC adapter Fluke PM9081 001 and a Banana Jack to BNC adapters Fluke PM9082 001 as shown in Figure 4 13 TV SIGNAL GENERATOR say ST8142 WMF Figure 4 13 Test Tool Input A to TV Signal Generator Inverted 8 Select the following test tool setup Press to open the SCOPE INPUTS menu Press to open the TRIGGER menu and choose VIDEO on A The VIDEO TRIGGER sub menu is shown now From the VIDEO TRIGGER menu choose SYSTEM NTSC or PAL SECAM or PAL pilus LINE SELECT POLARITY B NEGATIVE Using WD set the Input A sensitivity to 200 mV div e Using EJ select 20 us div 4 26 Performance Verification 4 4 5 Input A and Input B Tests 9 Using gt select the line number 310 for PAL or SECAM 262 for NTSC 10 Observe the trace and check to see if the test tool triggers on line number 311 for PAL
126. ensed by a logic circuit in the D ASIC that is active even when the test tool 1s turned off The D ASIC sends commands to the C ASICs and T ASIC via the SCLK and SDAT serial control lines e g to select the required trigger source Various I O lines are provided e g to control the BUZZER and the Slow ADC via the SADC bus 3 2 4 Power Circuit 3 6 The test tool can be powered via the power adapter or by the battery pack If the power adapter is connected it powers the test tool and charges the battery via the CHARGER CONVERTER circuit The battery charge current is sensed by sense resistor Rs signal IBAT It is controlled by changing the output current of the CHARGER CONVERTER control signal CHAGATE If no power adapter is connected the battery pack supplies the VBAT voltage The VBAT voltage powers the P ASIC and is also supplied to the FLY BACK CONVERTER switched mode power supply If the test tool is turned on the FLY BACK CONVERTER generates supply voltages for various test tool circuits The 3V3GAR supply voltage powers the D ASIC RAM and ROM If the test tool is turned off the battery supplies the 3 V3GAR voltage via transistor V569 This transistor is controlled by the P ASIC So when the test tool is turned off the D ASIC can still control the battery charging process CHARCURR signal the real time clock the on off key and the serial RS232 interface to turn the test tool on To monitor and control the bat
127. er Power Adapter only the 32 kHz clock runs If the 3 69 MHz clock 15 present then continue at Section7 4 3 7 4 2 Test Tool Software Does not Run Turn test tool OFF and ON again Check D471 pin 59 row1 for a 500 kHz triangular wave If no 500 kHz is not present but you hear a weak beep the test tool software runs but the buzzer circuit does not function correctly Go to Section 7 5 10 to check the buzzer circuit then continue at Section 7 4 3 to see why the test tool cannot be operated If a 500 kHz triangular wave is present the MASK software is running Continue at step 3 Load new software to see if the loaded software is corrupted See Section 7 6 Do the RAM test see Section 7 5 12 Check for bad soldered address data lines and IC pins Replace FLASH ROM D474 and RAM D475 7 4 3 Software Runs Test Tool not Operative 1 2 3 Check the Display and Backlight function see Section 7 5 1 Check the Fly Back Converter see Section 7 5 2 Check the Keyboard function see Section 7 5 3 7 7 123 124 Service Manual 7 5 Miscellaneous Functions 7 5 1 Display and Back Light Warning The voltage for the LCD back light fluorescent lamp is gt 400V 1 Connect another LCD unit to see if the problem is caused by the LCD unit The unit is not repairable 2 Defective display Check the LCD control signals on measure spots MS401 MS422 near to X453 Use a 10 1 probe with ground lead on the pr
128. ested in accordance with Standards ANSI ISA 582 01 1994 EN 61010 1 1993 IEC 1010 1 CAN CSA C22 2 No 1010 1 92 including approval UL3111 1 including approval Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Use of this equipment in a manner not specified by the manufacturer may impair protection provided by the equipment 2 2 Dual Input Oscilloscope 2 2 1 Vertical Frequency Response DC Coupled excluding probes and test leads Fluke 123 via BB120 Fluke 124 via BB120 with STL120 1 1 shielded test leads with VP40 10 1 probe Fluke 123 optional accessory Fluke 124 standard accessory AC Coupled LF roll off excluding probes and test leads with STL120 with 10 1 Probe Rise Time DC to 20 MHz 3 dB DC to 40 MHz 3 dB DC to 12 5 MHz 3 dB DC to 20 MHz 6 dB DC to 20 MHz 3 dB DC to 40 MHz 3 dB 10 Hz 3 dB 10 Hz 3dB lt 1 Hz 3 dB excluding probes and test leads Fluke 123 17 5 ns excluding probes and test leads Fluke 124 8 75 ns Input Impedance excluding probes and test leads with BB120 with STL120 with VP40 10 1 Probe Sensitivity 1 MQ 12 pF 1 MQ 20 pF 1 MQ 225 pF 5 MQ 15 5 pF 5 mV to 500 V div 2 3 123 124 Service Manual Display Modes Input Voltage and B A A B B Direct with test leads or with VP40 Probe 600 Vrms with BB120 300 Vrms For detailed specific
129. ff The FLY BACK CONVERTER is off The CHARGER CONVERTER charges the batteries 1f installed Operational amp Charge mode The Operational amp Charge mode is entered when the test tool is powered by the power adapter and is turned on The FLY BACK CONVERTER is on the CHARGER CONVERTER supplies the primary current If batteries are installed they will be charged In this mode a battery refresh see below can be done Operational mode The Operational mode is entered when the test tool is powered by batteries only and is turned on The FLY BACK CONVERTER is on the batteries supply the primary current If the battery voltage VBAT drops below 4V when starting up the fly back converter the Off mode is entered 3 7 123 124 Service Manual Battery Refresh In the following situations the batteries will need a deep discharge full charge cycle called a refresh every 50 not full discharge charge cycles or each 3 months This prevents battery capacity loss due to the memory effect e after the battery has been removed as the test tool does not know the battery status then The user will be prompted for this action when he turns the test tool on directly following the start up screen A refresh cycle takes 16 hours maximum depending on the battery status It can be started via the keyboard USER OPTIONS F1 activate refresh if the test tool is on and the power adapter is connected During a refresh first the ba
130. ges are supplied by the reference circuit on the Trigger part The ADC output voltages MIDADC A B are supplied to the C ASIC s input pin 28 and are added to the conditioned input signal The MIDADC voltage matches the middle of the C ASIC output swing to the middle of the ADC input swing The ADC s are supplied with 3 V3ADCD supply for digital section derived from 3V3D and 3V3ADCA supply for analog section derived from 3 ADC data acquisition for traces and numerical readings During an acquisition cycle ADC samples are acquired to complete a trace on the LCD Numerical readings METER readings are derived from the trace So in single shot mode a new reading becomes available when a new trace is started The test tool software starts an acquisition cycle The D ASIC acquires data from the ADC and stores them internally in a cyclic Fast Acquisition Memory FAM The D ASIC also makes the HOLDOFF line low to enable the T ASIC to generate the trigger signal TRIGDT The acquisition cycle is stopped if the required number of samples is acquired From the FAM the ADC data are moved to the RAM D475 The ADC data stored in the RAM are processed and represented as traces and readings Triggering HOLDOFF TRIGDT Randomize To start a new trace the D ASIC makes the HOLDOFF signal low Now the T ASIC can generate the trigger signal TRIGDT For signal frequencies higher than the system clock frequency and in the random repetitive sam
131. he TVSYNC signal for triggering This signal is the synchronization pulse derived from the TRIGA or TRIGB composite video signal The color filter amplify section in the T ASIC blocks the color information and amplifies and inverts 1f required the video signal The TVOUT output signal is supplied to the synchronization pulse separator circuit This circuit consists of C395 V395 and related parts The output signal TVSYNC is the synchronization pulse at the appropriate voltage level and amplitude for the T ASIC analog trigger path Note External triggers provided by the Isolated Trigger Probe to the optical interface are processed directly by the D ASIC The TRIG A TRIG B or TVSYNC signal and two trigger level voltages TRIGLEV1 TRIGLEV2 are supplied to the analog trigger part The trigger level voltages are supplied by the PWM section on the Digital part See Section 3 3 4 The TRIGLEVI voltage 15 used for triggering on a negative slope of the Input A B voltage The TRIGLEVZ2 voltage is used for triggering on a positive slope of the Input A B voltage As the C ASIC inverts the Input A B voltage the TRIGA TRIGB slopes on the T ASIC input are inverted From the selected trigger source signal and the used trigger level voltages the ALLTRIG and the DUALTRIG trigger signal are derived The select logic selects which one will be used by the synchronization delta T circuit to generate the final trigger There are three possibilities
132. he test start at step 19 Set the 5500A to Standby Press Eg to clear the display Press E to enable the arrow keys for Trigger Level and Slope adjustment Using 20 select negative slope triggering L Using set the trigger level to 2 divisions from the screen center For negative slope triggering the trigger level is the bottom of the trigger icon L Set the 55004 to source 3 DC Verify that no trace is shown on the test tool display and that the status line at the display bottom shows Wait B L If the display shows the traces and status Hold B L then press to re arm the test tool for a trigger Decrease the 55004 voltage in 0 1V steps using the 5500A EDIT FIELD function until the test tool is triggered and the traces are shown Verify that the 5500A voltage is between 1 5V and 2 5V when the test tool is triggered To repeat the test start at step 28 When you are finished set the 5500A to Standby 4 5 9 Input A and B DC Voltage Accuracy Test WARNING Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows l 2 Connect the test tool to the 5500A as for the previous test see Figure 4 5 Select the following test tool setup Press select auto ranging AUTO in top of display Press to open
133. ia PM9080 optically isolated RS232 adapter cable optional using SW90W FlukeView software for Windows MIL PRF 28800F Class 2 0 to 50 C 32 to 122 F 20 to 60 C 4 to 140 F noncondensing 95 75 45 noncondensing 4 5 km 15 000 feet Max Input and Floating Voltage 600 Vrms up to 2 km linearly derating to 400 Vrms 4 5 km 12 km 40 000 feet MIL28800F Class 2 3 8 4 2 4 5 5 3 1 Max 3g MIL28800F Class 2 3 8 5 1 4 5 5 4 1 Max 30g MIL28800F Class 3 3 8 7 amp 4 5 6 1 MIL28800F Class 2 3 8 8 2 amp 4 5 6 2 2 Structural parts meet 48 hours 5 salt solution test EN 50081 1 1992 EN55022 and EN60555 2 EN 50082 2 1992 1000 4 2 3 4 5 see also Section 2 9 Tables 2 1 to 2 3 123 124 Service Manual Enclosure Protection IP51 ref IEC529 2 7 Service and Maintenance Calibration Interval 1 Year 2 8 Safety A Designed for measurements on 600 Vrms Category III Installations Pollution Degree 2 per ANSI ISA 582 01 1994 EN61010 1 1993 IEC1010 1 CAN CSA C22 2 No 1010 1 92 including approval UL3111 1 including approval Input Voltage Input and Direct on input with leads with VP40 600 Vrms For derating see Figure 2 1 2 With Banana to BNC Adapter BB120 300V rms For derating see Figure 2 1 F loating Voltage from any terminal to ground 600 Vrms up to 400Hz MAX INPUT VOLTAGE Vrms 1000 500
134. ically show up when contaminated units are operated in humid areas i ST8015 CGM 6 3 Main PCA Unit Assembly 6 7 123 124 Service Manual 6 4 Reassembling the Main PCA Unit Reassembling the main PCA is the reverse of disassembly However you must follow special precautions when reassembling the main PCA unit 1 Ensure the input banana jacks have the rubber sealing ring in place Input A B item 9 COM input item 10 see Figure 4 6 2 Do not forget to install the power connector insulator item 3 and the LED holder item 6 3 Notice the correct position of the shielding box main PCA notice the shielding plates on the PCA and shielding plate as shown in Figure 6 2 The tabs of the shielding plate must be inside both shields 6 5 Reassembling the Test Tool Reassembling the test tool 15 the reverse of disassembly However you must follow special precautions when reassembling the test tool Refer also to figure 6 1 Caution The first shipped units are provided with a yellow tube on the two notches with the screw inserts at the top in the top case The reason for this is that the display assembly in these units is smaller than in the later units display assemblies supplied as spare part are of the latest type and do not need the yellow tubes in the top case e Remove the tube from both notches when installing a new display assembly Transfer the tubes to the new top case if you replac
135. ification Points 5500A output V rms 5500A Frequency Reading A B 4 5 12 Input and B Volts Peak Measurements Test WARNING Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proceed as follows to test the Volts Peak measurement function 1 Connect the test tool to the 5500A as for the previous test see Figure 4 5 2 Selectthe following test tool setup e Press Eg to open the SCOPE INPUTS menu Press E to open the TRIGGER menu and choose INPUT A SCREEN UPDATE FREE RUN AUTO RANGE gt 15HZ e Press Lg to select auto ranging AUTO in top of display e Press BS to open the INPUT A MEASUREMENTS menu and choose MEASURE on B PEAK From the INPUT A PEAK sub menu choose PEAK TYPE e Press to open the INPUT MEASUREMENTS menu and choose INPUT B MEASURE on B li PEAK 4 18 Performance Verification 4 4 5 Input A and Input B Tests From the INPUT B PEAK sub menu choose e Using WD select 1V div for input A and B 3 Set the 5500A to source a sine wave to the first test point in Table 4 5 NORMAL output WAVE sine 4 Observe the Input A and Input B main reading and check to see if it is within the range shown under the appropriate column Con
136. in the Operational and in the Operational amp Charge mode Charger Converter See Also Figure 3 3 The power adapter powers the Charge Control circuit in the P ASIC via an internal linear regulator The power adapter voltage is applied to R501 The Charger Converter circuit controls the battery charge current If a charged battery pack is installed VBAT is approximately 4 8V If no battery pack is installed VBAT is approximately 15V The voltage VBAT is supplied to the battery pack to the P ASIC to the Fly Back Converter and to transistor V569 The FET control signal CHAGATE is a 100 kHz square wave voltage with a variable duty cycle supplied by the P ASIC Control circuit The duty cycle determines the amount of energy loaded into L501 C503 By controlling the voltage VBAT the battery charge current can be controlled The various test tool circuits are supplied by the Fly Back Converter and or V569 Required power adapter voltage The P ASIC supplies a current to reference resistor R516 VADALOW pin 8 It compares the voltage on R516 to the power adapter voltage VADAPTER on pin 20 supplied via R502 and attenuated in the P ASIC If the power adapter voltage is below 10V the P ASIC output pin 12 and the line MAINVAL are low This signal on pin 12 is also supplied to the P ASIC internal control circuit which then makes the CHAGATE signal high As a result FET V506 becomes non conductive and the Charger Converter is off Batte
137. ination 2 Select the following test tool setup e Input B on if not already e Press to select auto ranging AUTO in top of display toggles between AUTO and MANUAL ranging Press to open the SCOPE INPUTS menu Press E to open the SCOPE OPTIONS menu and choose Performance Verification 4 4 5 Input A and Input B Tests SCOPE MODE NORMAL WAVEFORM MODE SMOOTH 3 Using toggle the time base between 10 ms div and 5 ms div the time base ranging is set to manual now the input sensitivity is still automatic no indication AUTO or MANUAL is displayed After changing the time base wait some seconds until the trace has settled Observe the Input A trace and check to see if it returns to the same position after changing the time base The allowed difference is 0 04 division 1 pixel Observe the Input B trace for the same conditions 4 Using CI toggle the time base between 1 us div and 500 ns div After changing the time base wait some seconds until the trace has settled Observe the Input A trace and check to see if it is set to the same position after changing the time base The allowed difference is 0 04 division 1 pixel Observe the Input B trace for the same conditions 5 Using set the time base to 10 ms div 6 Using toggle the sensitivity of Input between 5 and 10 mV div After changing the sensitivity wait some seconds until the trace has settled
138. ing The P ASIC indicates the status of 3 V3GAR voltage via the VDDVAL line connected to D ASIC pin N2 If 3V3GAR is 23V VDDVAL is high and the D ASIC will start up As a result the D ASIC functions are operative regardless of the test tool s is ON OFF status The RAM supply voltage and supply voltage VF are also derived from 3V3GAR Analog to Digital Conversion For voltage and resistance measurements the Input A B B for voltage only signal is conditioned by C ASIC to 150 mV division Zero and gain measurement are done to eliminate offset and gain errors The C ASIC output voltage is supplied to the Channel A B ADC D401 D451 pin 27 The ADC samples the analog voltage and converts it 3 25 123 124 Service Manual 3 26 into an 8 bit data byte 00 07 The data are read and processed by the D ASIC see below ADC data Acquisition The sample rate depends on the sample clock supplied to pin 15 The sample rate is 5 or 25 depending on the instrument mode The ADC A input signal is sampled by sample clock SMPCLK A ADC B by SMPCLK B Both sample clocks are generated by the D ASIC SMPCLK B is also used for synchronisation of the Trigger Circuit B is choosen because of the printed circuit board track layout The reference voltages REFADCT and REFADCB determine the input voltage swing that corresponds to an output data swing of 00000000 to 11111111 20 07 reference volta
139. inue at Section 7 4 2 Check the Keyboard line MS433 next to X452 for a 500 kHz 0 6V triangular wave If not correct continue at step 3 If correct the mask software runs but the buzzer circuit does not function Check the buzzer function Section 7 5 10 and then continue at Section 7 4 2 Check N501 pin 60 VBATSUP for gt 4 8V If not correct check R503 and connections to battery pack Check 571 3V3GAR for 3V3V If not correct this is possibly caused by V569 R580 TP571 short to ground loose Corrective Maintenance 7 4 Starting with a Dead Test Tool pins of N501 or 501 defective Check the VD supply voltage on D ASIC D471 Temporarily remove R470 to check for short circuit Check N501 pin 64 VGARVAL for 3 3V If not correct a Check if the line is shorted to ground b Check 501 pin 73 REFPWM2 for 3V3 REFPWM2 is supplied by N501 and derived from REFP on the reference circuit on the Trigger part Check TP307 N501 pin 72 for 1 22V check V301 R307 If no 1 22V and V301 R307 and connections are correct then replace N501 c Check N501 pin 12 NETVALID for 2 6V If not correct proceed as indicated in Section 7 3 step 6 d Check the Power ON OFF function see Section 7 5 13 Check X tal signals on TP473 32 kHz TP474 3 69 MHz and TP475 50 MHz if not correct check connections replace X tals replace D471 If the Test Tool is off AND not powered by the Battery Charg
140. ions 3 3 3 Detailed Circuit Descriptions electrical interference In PCB versions 8 and newer R605 and R606 provide a more reliable startup of the backlight converter N yY Voltage at T600 pin 4 Voltage AOUT Voltage BOUT Voltage COUT t t Zero Zero detect detect Figure 3 7 Back Light Converter Voltages 3 3 2 Channel A Channel B Measurement Circuits The description below refers to circuit diagrams Figure 9 1 and Figure 9 2 The Channel and Channel B circuits are almost identical Both channels can measure voltage and do time related measurements frequency pulse width etc Channel A also provides resistance continuity diode and capacitance measurements The Channel A B circuitry is built up around a C ASIC OQ0258 The C ASIC is placed directly behind the input connector and transforms the input signal to levels that are suitable for the ADC and trigger circuits The C ASIC Figure 3 8 shows the simplified C ASIC block diagram The C ASIC consists of separate paths for HF and LF signals an output stage that delivers signals to the trigger and ADC circuits and a control block that allows software control of all modes and adjustments The transition frequency from the LF path to the HF path is approximately 20 kHz but there 15 a large overlap CHANNEL ASIC OQ 0258 ADC HF PATH OUTPUT STAGE TRIGGER LF PATH CONTROL SUPPLY INPUT GROUND CAL POS BUS SUPPLY
141. ising edge 0 596 after 200 ns HFG amp FI AB CL 0600 HFG amp FI AB CL 0601 HFG amp FI AB CL 0607 2 5V 5V HFG amp FI CL 0608 HFG amp FI B 0628 D As the 5500A output is not terminated with 500 its output voltage is two times its set voltage 2 After starting the first step in this table cell these steps are done automatically 5 8 Calibration Adjustment 5 6 Final Calibration Table 5 2 HF Gain Calibration Points Slow Cal step 5500A Setting Test Tool Input Signal 1 kHz MODE Requirements wavegen 1 kHz square trise lt 2 us WAVE square flatness after rising edge lt 0 5 after 4 us HF Gain AB CL 0609 HF Gain A CL 0612 HF Gain B CL 0632 HF Gain CL 0615 HF Gain CL 0635 After starting the first step in this table cell these steps are done automatically 5 6 2 Delta T Gain Trigger Delay Time amp Pulse Adjust Input A Proceed as follows to do the calibrations 1 Press ZZ select calibration step Delta T CL 0700 IDLE 2 Connect the test tool to the 5500A as shown in Figure 5 4 FLUKE 5500A CALIBRATOR ST8004 WMF Figure 5 4 5500A Scope Output to Input A 3 Set the 55004 to source a 1V 1 MHz fast rising rise time lt 1 ns square wave SCOPE output MODE edge 4 Set the 5500A to operate 5 Press to start the calibration The Delta T gain Trigger Delay CL0720 and Pulse Adjust Input CL0640
142. it and ADC7s 040000000000 000000000000 3 25 3 1 Service Manual 123 124 996 15 a T S39VLIOA 1 OL 518 00 8 Rund 1 1 i H nodus Ivas 1 123145 1 3198 1 1 I DENN i YOL43AN09 AY 1 EI 81531090 1 109101 1H9 I132V8 MERI oon i S he 1 1 N 1 E 1 1 I i Rie e 1 1 152090 1 1 1 3JONOUMd S 5 gt Unova 1 1 1 1 B 1 1 1 i gt 1 E 1 1 1 1 w Ja a D D 1 1 1 HO1H3ANO2 1 1 gt Bee LAS TONAL 1 35435 1 1 3lvovuo I HO1vHVd3S 952000 coim T Bu 1 En u395IlHL
143. itance Gain Low and High essen 5 14 5 6 9 Capacitance Clamp amp 5 14 5 6 10 Capaeitance u u e eere het are e esas eee 5 15 5 7 Save Calibration Data and Exit 5 15 Calibration Adjustment 5 1 General 5 1 General 5 1 1 Introduction The following information provides the complete Calibration Adjustment procedure for the Fluke 123 and 124 test tools with firmware V02 00 and onwards The test tool allows closed case calibration using known reference sources It measures the reference signals calculates the correction factors and stores the correction factors in RAM After completing the calibration the correction factors can be stored in FlashROM The test tool should be calibrated after repair or if it fails the performance test The test tool has a normal calibration cycle of one year The Calibration Adjustment procedure is identical for Fluke 123 and Fluke 124 5 1 2 Calibration number and date When storing valid calibration data in FlashROM after performing the calibration adjustment procedure the calibration date is set to the actual test tool date and calibration number is raised by one To display the calibration date and number 1 Press to open the USER OPTIONS menu 2 Press to show the VERSION amp CALIBRATION screen see Figure 5 1 3 Press to return to normal mode k l VERSION amp CALIBRATION
144. itute another calibrator as long as it meets the minimum test requirements e Fluke 5500A Multi Product Calibrator including 5500A SC Oscilloscope Calibration Option e Stackable Test Leads 4x supplied with the 5500 500 Coax Cables 2x Fluke PM9091 1 5m or PM9092 0 5m 50 feed through terminations 2x Fluke PM9585 e Fluke BB120 Shielded Banana to Female BNC adapters 2x supplied with the Fluke 123 Dual Banana Plug to Female BNC Adapter 1x Fluke PM9081 001 Dual Banana Jack to BNC Adapter 1x Fluke PM9082 001 TV Signal Generator Philips PM5418 750 Coax cable 1x Fluke PM9075 750 Feed through termination 1x ITT Pomona model 4119 75 e PM9093 001 Male BNC to Dual Female BNC Adapter 4 3 How To Verify Verification procedures for the display function and measure functions follow For each procedure the test requirements are listed If the result of the test does not meet the requirements the test tool should be recalibrated or repaired if necessary Some of the tests are slightly different for Fluke 123 and Fluke 124 This is caused by 4 3 123 124 Service Manual the higher vertical and trigger bandwidth in Fluke 124 Differences in requirements for Fluke 123 and Fluke 124 are clearly indicated Follow these general instructions for all tests For all tests power the test tool with the PM8907 power adapter The battery pack must be installed Allow the 550
145. keeping pressed the and gt keys and then turning the test tool on When active the mask ROM software generates a HF triangular wave on measurement spot MS433 pin C5 of the D ASIC Controlled switch off The programmable logic device D470 CPLD provides a controlled power down of the D ASIC In case of a non controlled power down a 6 mA D ASIC supply current can flow after switching the test tool off The normal D ASIC supply current at power off should be below 1 mA with the mains adapter disconnected Watchdog In case that a software hang up arises the watchdog circuit D473 will reset the D ASIC to re start the software Display Control The LCD unit includes the LCD the LCD drivers and the fluorescent back light lamp It is connected to the main board via connector X453 The LCD is built up of 240 columns of 240 pixels each 240x240 matrix The D ASIC supplies the data and control signals for the LCD drivers on the LCD unit Figure 3 13 Common Driver Di Common Driver Do Di Common Driver X81 160 X161 240 FRAME TOP Driver Din FRONTVIEW LCD DATACLKO LINECLK M PIXEL 0 0 Figure 3 13 LCD Control Each 14 ms the LCD picture is refreshed during a frame The frame pulse FRAME indicates that the concurrent LINECLK pulse is for the first column The column drivers 3 27 123 124 Service Manual must have been filled with
146. led in Fluke 124 BP130 battery door 4022 244 98491 combiscrew M3x10 5322 502 21507 bail 5322 466 10975 main PCA unit assembly No firmware loaded 4022 246 19831 Not calibrated Note The Test Tool contains a Rechargeable Ni Cd Model 123 or Ni MH Model 124 battery Do not mix with the solid wastestream Spent batteries should be disposed of by a qualified recycler or hazardous materials handler 8 List of Replaceable Parts 8 3 Final Assembly Parts ST8014 EPS Figure 8 1 Fluke 123 124 Final Assembly 8 5 123 124 Service Manual 8 4 Main PCA Unit Parts See Table 8 2 and Figure 8 2 for the Main PCA Unit parts Table 8 2 Main PCA Unit screw M2 5x5 5322 502 21206 combiscrew M3x10 5322 502 21507 insulator for power input 5322 325 10163 main PCA shielding box 5322 466 10976 guide piece for optical gate LEDs 5322 256 10201 main PCA shielding plate 5322 466 10964 screw M2 5x16 5322 502 14132 oO N O ring 2 17 mm Input 5322 530 10272 O ring 2 12 mm COM input 5322 530 10273 Note If the main PCA must be replaced you must order the complete Main PCA Unit ST8015 CGM Figure 8 2 Main PCA Unit 8 6 8 5 Parts See Figure 9 6 and Figure 9 7 at the end of Chapter 9 for the drawings Table 8 3 Main PCA Ordering Code List of Replaceable Parts 8 8 5 Main PCA Par
147. level at which current FET V554 will be switched off If the output voltage increases the current level at which V554 1s switched off will become lower and less energy is transferred to the secondary winding As a result the output voltage will become lower Circuit Descriptions 3 3 3 Detailed Circuit Descriptions An internal current source supplies a current to R559 The resulting voltage is a reference for the maximum allowable primary current IMAXFLY The voltage across the sense resistor FLYSENSP is compared to the IMAXFLY voltage If the current exceeds the set limit FET V554 will be turned off Another internal current source supplies a current to R558 This resulting voltage is a reference for the maximum allowable output voltage VOUTHI The 3V3A output voltage is attenuated and level shifted in the P ASIC and then compared to the VOUTHI voltage If the 3V3A voltage exceeds the set limit FET V554 will be turned off The FREQPS control signal 15 converted to appropriate voltage levels for the FET switch V554 by the BOOST circuit The voltage VBAT supplies the BOOST circuit power via V553 and R561 The FREQPS signal is also supplied to the D ASIC in order to detect if the Fly Back converter is running well V551 and C552 limit the voltage on the primary winding of T552 when the FET V554 is turned of The signal SNUB increases the FLYGATE high level to decreases ON resistance of V554 less power dissipation in V554
148. libration adjustments 1 Power the test tool via the power adapter input using the PM8907 power adapter 2 Check the actual test tool date and adjust the date if necessary Press 0 open the USER OPTIONS menu Using C select DATE ADJUST press to open the DATE ADJUST menu e adjust the date if necessary 3 Select the Maintenance mode The Calibration Adjustment Procedure uses built in calibration setups that can be accessed in the Maintenance mode To enter the Maintenance mode proceed as follows e Press and hold Press and release EI e Release Es display shows the Calibration Adjustment Screen The display shows the first calibration step Warming Up CL 0200 and the calibration status IDLE valid or IDLE invalid Calibration Adjustment 5 3 Starting Calibration Adjustment 4 Continue with either a or b below a calibrate the display contrast adjustment range and default contrast go to Section 5 4 Contrast Calibration Adjustment This calibration step is only required if the display cannot made dark or light enough or if the display after a test tool reset is too light or too dark b Tocalibrate the test tool without calibrating the contrast go to Section 5 5 Warming Up amp Pre calibration Explanation of screen messages and key functions When the test tool is in the Maintenance Mode only the F1 to F4 soft keys the ON OFF key and the backlight key can be opera
149. lt 4 SDA 38 az Zoo RAMA14 HI NC Vdd GND EE aoe E 8220 5 g8 5 x geenen X82 NC asek x 8 SRAM Vdd GND bon 55 u 3955555 s Vdd GND TU oop 9882202422 2520000 56008 885 poren ona DS DBE 002225552 O RAMRDE A2 WE GND 221 2230000666062 25222925528 5 2 o PAMBDE L GND Jaa J m H IP493 o BAMCSL GND X452 ada 3 8 5 8 TP492 G RAMCSHK BLE GND fi 1 RAMA15 TP493 Q RAMCSe ps GNP ROWO 2 16 VR H6 3 ROWI 1 59 ag E E xu 17 NG NC 4 x RES eo 5 CY62146VLL 70BAI ___ 55 Vss NC ROWS 3399319 5 lt elo 0 7 amp ROW4 BBOS 565220 333404 lt 8 Sees 25528 TRAM p z ROWS 998599 SS 3 SlalalFiFiFlels 55 nis LANI Eh B 10 0 RXD2 KEYBOARD 9 COLI T Bass 10061 XTCK 10 COL E cage E Baaz Hook ENABLEMAIN E 11 COL3 100nF z R490 Hok TDO C BUZ TP496 12 COLA Ee 2222 5 BXD1 R497 OE PROBE 7 T CPLD BATIDGAR 498 o BATIDENT vass M SLOWADG m m A CTP TI C 5 amp SEMUX 7 4 E SELMUX1 7 C400 E XCRIOODXU gt ibo
150. m R286 289 0233 234 V554 592 68 5 455 e 6201 4 5248 m 2 551 8 062 254 lt 99 T R551 5 B TT gt R457 826 R28 629 28 S BEREEE cm Ga em 1 09 0 B ey 52 MIS i 527 SSEBEESSES z V566 R509 R580 554 R529 S H 5 5 a2 g 2155 YE 8 8 Figure 9 10 Main Small Component SMD Side 9 12 Chapter 10 Modifications 10 1 Software modifications ener 10 1 10 2 Hardware 200040000 4 UU S 10 1 Modifications 1 0 10 1 Software modifications 10 1 Software modifications Changes and improvements made to the test tool software firmware are identified by incrementing the software version number These changes are documented on a supplemental change errata sheet which when applicable is included with the manual To display the software version proceed as follows Press to open the USER OPTIONS menu 2 Press to show the VERSION amp CALIBRATION screen see Figure 5 1 in Section 5 3 Press to return to normal mode The first software release suitable for both Fluke 123 and Fluke 124 is V02 00 This release is still valid at the printing date of this Service Manual 10 2 Hardware modifications Changes and improvements mad
151. mples to built the trace also the frequency pulse width and duty cycle of the input signal are calculated Supply Voltages The 5 3V3A and 3V3A supply voltages are supplied by the Fly Back Converter on the POWER part The voltages are present only if the test tool is turned on 3 3 3 Trigger Circuit The description refers to circuit diagram Figure 9 4 The trigger section is built up around the T ASIC OQ0257 It provides the following functions e Triggering trigger source selection trigger signal conditioning and generation of trigger information to be supplied to the D ASIC e Current source for resistance and capacitance measurements e Voltage reference source buffering and generation of reference voltages AC DC relay and Resistance Capacitance relay control 3 20 Circuit Descriptions 3 3 3 Detailed Circuit Descriptions Triggering Figure 3 10 shows the block diagram of the T ASIC trigger section E ALLTRIG pL TRIGQUAL ALLTRIG select synchronize 34 gc f TRIGDT 3 HOLDOFF 38 i SMPCLK DACTEST analog trigger path colour filter amplifier separator Figure 3 10 T ASIC Trigger Section Block Diagram In normal trigger modes not TV triggering the analog trigger path directly uses the Input A TRIG A or Input B TRIG B signal for triggering In the TV trigger mode the analog trigger path uses t
152. n authorized Fluke service center To locate an authorized service center refer to the second page of this manual back of the title page In the event that the part ordered has been replaced by a new or improved part the replacement will be accompanied by an explanatory note and installation instructions if necessary To ensure prompt delivery of the correct part include the following information when you place an order e Instrument model Fluke 123 or 124 12 digit instrument code 9444 and serial number DM The items are printed on the type plate on the bottom cover e Ordering code number Reference designator e Description Quantity 8 3 123 124 Service Manual 8 3 Final Assembly Parts See Table 8 1 and Figure 8 1 for the Final Assembly parts Table 8 1 Final Assembly Parts top case assembly 5322 442 00272 window decal lens Fluke 123 4022 240 12431 window decal lens Fluke 124 4022 240 13031 shielding foil 5322 466 11434 dust seal 5322 466 11435 conductive foam strip 5322 466 11436 display shielding bracket 5322 402 10204 display assembly 5322 135 00029 keypad 5322 410 10397 keypad foil 5322 276 13711 2 3 4 5 6 7 8 9 keyboard pressure plate 5322 466 10963 combiscrew M3x10 5322 502 21507 bottom case 5322 442 00273 gt combiscrew 3 10 5322 502 21507 battery pack Ni Cd as installed Fluke 123 BP120 battery pack Ni MH as instal
153. nals needed for control via the Slow ADC 1 Check the SLOW see Section 7 5 3 2 Check VGARVAL 501 pin 64 for 3 3V If not correct check if the line 1s shorted to ground If it is not then replace N501 3 Trace the CHARCURR signal path to R534 R 442 and D471 D ASIC output pin 40 d Check the following 1 C506 and connections to N501 2 Connections between V506 and N501 pin 16 CHAGATE 3 The voltage at TP501 N501 pin 19 VCHDRIVE for 15 20V 4 The voltage at N501 pin 43 for a triangle waveform 80 100 kHz 1 6V to T3 2V 5 Ifl to 4 correct then replace 501 7 4 Starting with a Dead Test Tool If the test tool cannot be turned on when powered by a charged battery pack or by the power adapter follow the steps below to locate the fault 1 Connect a power adapter and charged battery pack 2 Turn the test tool on and listen if you hear a beep If you hear no beep continue at 7 4 1 Test Tool Completely Dead b Ifyou hear a weak beep continue at 7 4 2 Test Tool Software Does not Run c Ifyou hear a normal beep the software runs but obviously the test tool is not operative Continue at 7 4 3 Software Runs Test Tool not Operative 7 4 1 Test Tool Completely Dead 1 Turn the test tool off Keep the keys ep pressed and turn the test tool on again This will start up the mask software If you still hear no beep continue at step 2 If you hear a weak beep now cont
154. nals with a variable duty cycle to the PWM FILTERS circuit RC filters The outgoing APWM BUS Analog PWM provides analog signals of which the amplitude is controlled by the D ASIC These voltages are used to control e g the trace positions C ASIC the trigger levels T ASIC and the battery charge current P ASIC In random sampling mode time base faster than 1 us div a trace is built up from several acquisition cycles During each acquisition a number of trace samples are placed as pixels in the LCD The RANDOMIZE circuit takes care that the starting moment of each acquisition cycle trigger release signal HOLDOFF goes low is random This prevents that at each next acquisition the trace is sampled at the same time positions and that the displayed trace misses samples at some places on the LCD The D ASIC supplies control data and display data to the LCD module The LCD module is connected to the main board via connector X453 It consists of the LCD LCD 123 124 Service Manual drivers and a fluorescent back light lamp As the module is not repairable no detailed description and diagrams are provided The back light supply voltage is generated by the back light converter on the POWER part The keys of the keyboard are arranged in a matrix The D ASIC drives the rows and scans the matrix The contact pads on the keyboard foil are connected to the main board via connector X452 The ON OFF key is not included in the matrix but is s
155. ncludes a HF pre amplifier with switchable gain factors for the 1 2 5 steps The C ASIC also includes circuitry to adjust the gain and pulse response ADC output pin 27 The combined conditioned HF LF signal is supplied to the ADC output pin 27 via an internal ADC buffer The output voltage is 150 mV division The MIDADC signal pin 28 supplied by the ADC matches the middle of the C ASIC output voltage swing to the middle if the ADC input voltage swing TRIGGER output pin 29 The combined conditioned HF LF signal is also supplied to the trigger output pin 29 via an internal trigger buffer The output voltage is 100 mV div This signal TRIG A 18 supplied to the TRIGGER ASIC for triggering and time related measurements See 3 3 4 Triggering For capacitance measurements the ADC output is not used but the TRIG A output pulse length indicates the measured capacitance see measurements below GPROT input pin 2 PTC Positive Temperature Coefficient resistors R106 R206 are provided between the Input A and Input B shield ground and the COM input instrument ground This prevents damage to the test tool if the various ground inputs are connected to different voltage levels The voltage across the PTC resistor is supplied via the GPROT input pin 2 to an input buffer If this voltage exceeds 200 mV the ground protect circuit in the C ASIC makes the DACTEST output pin 24 high The DACTEST line output level i
156. obe connected to the metal screening of the UUT Notice that MS407 is missing a MS422 DISPON for 3 3V b MS420 DATACLKO for 120 ns pulses MS414 415 LCDATO 1 for 250 ns pulses MS417 418 LCDAT2 for 250 ns pulses MS412 LINECLK for 120 ns pulses 16 kHz MS411 FRAME for 50 us pulses 70 Hz MS409 M for a 625Hz square wave c MS406 5VA for 5V MS405 3V3D for 3 3V MS401 30VD for 30V from Fly Back Converter d MS404 REFPWMI 3 3V 3 Bad contrast a Check MS403 CONTRAST for a 60 kHz sinewave of 200 mVpp that rides on 0 8 b Check MS408 LCDTEMP1 for 1 6V at room temperature to SLOW ADC If not correct check R591 in SLOW ADC part 4 Defective backlight a Turn the test tool on and monitor the voltage on T600 pin 3 or pin 5 for a 8 Vpp 66 kHz half rectified sine wave Ifa half rectified sine wave with an increasing amplitude is only seen for about 0 2 second directly after power on then the secondary circuit is defective Install a new LCD unit If this does not cure the problem check the resistance between T600 pin 10 and 6 for 300Q replace V603 V605 Check C606 b Check T600 pin 3 and pin 5 for a 8 Vpp 66 kHz half rectified sine wave If it is present on only pin 3 or pin 5 then replace V601 c Check TP601 and TP602 for a 7Vpp 66 kHz square wave If not correct then check TP604 TLON for 3V3 If TLON is correct then replace N600 d Check replace V600 V602
157. obes and power supply from any live source and from the test tool itself Always remove the battery pack before completely disassembling the test tool If repair of the disassembled test tool under voltage is required it shall be carried out only by qualified personnel using customary precautions against electric shock 6 2 Disassembling Procedures 6 1 1 Required Tools To access all the assemblies you need the following e Static free work surface and anti static wrist wrap e 8 and 10 Torx screwdrivers Cotton gloves to avoid contaminating the lens and the 6 2 2 Removing the Battery Pack Referring to Figure 6 1 use the following procedure to remove the battery pack 1 Loosen the M3 Torx screw item 15 do not remove it from the battery door 2 Lift the battery door at the screw edge to remove it 3 Lift out the battery pack and unplug the cable leading to the Main PCA pull the cable gently backwards 6 2 3 Removing the Bail Referring to Figure 6 1 use the following procedure to remove the bail item 16 1 Set the bail to a 45 degree position respective to the test tool bottom 2 Holding the test tool tight rotate the bail firmly sideways 6 2 4 Opening the Test Tool Referring to Figure 6 1 use the following procedure to open the test tool 1 Remove the battery pack see Section 6 2 2 2 Unscrew the four M3 Torx screws item 12 that secure the bottom case to the top case 3 Hold the test to
158. ol upside down and lift off the bottom case 6 3 Service Manual 123 124 ST8014 EPS Figure 6 1 Fluke 123 124 Main Assembly 6 4 Disassembling the Test Tool 6 2 Disassembling Procedures 6 2 5 Removing the Main PCA Unit Referring to Figure 6 1 use the following procedure to remove the main PCA unit 1 Open the test tool see Section 6 2 4 2 Disconnect the LCD flex cable and the keypad foil flat cable see Figure 6 2 Unlock the cables by lifting the connector latch The latch remains attached to the connector body The keypad foil is provided with a shielding flap that covers the LCD flat cable The end of the flap is put under the main PCA unit shielding plate and can be easily pulled out Caution To avoid contaminating the flex cable contacts with oil from your fingers do not touch the contacts or wear gloves Contaminated contacts may not cause immediate instrument failure in controlled environments Failures typically show up when contaminated units are operated in humid areas 3 Unplug the backlight cable Warning If the battery pack or the power adapter is connected the LCD backlight voltage on the wire cable is 400V when the test tool is on 4 Remove the two screws item 10 that secure the Main unit to the top case 5 Lift the screw end of the Main PCA unit and remove the unit by gently wiggling the assembly from side to side as you
159. on and Warning eee 1 3 1 4 Symbols used in this Manual and on Instrument 1 3 L S Impaired Safety aio ene rete i eet tie eee te ine be e es 1 4 1 6 General Safety Information eee nennen 1 4 Safety Instructions 1 1 1 Introduction 1 1 Introduction Read these pages carefully before beginning to install and use the instrument The following paragraphs contain information cautions and warnings which must be followed to ensure safe operation and to keep the instrument in a safe condition Warning Servicing described in this manual is to be done only by qualified service personnel To avoid electrical shock do not service the instrument unless you are qualified to do so 1 2 Safety Precautions For the correct and safe use of this instrument it is essential that both operating and service personnel follow generally accepted safety procedures in addition to the safety precautions specified in this manual Specific warning and caution statements where they apply will be found throughout the manual Where necessary the warning and caution statements and or symbols are marked on the instrument 1 3 Caution and Warning Statements Caution Used to indicate correct operating or maintenance procedures to prevent damage to or destruction of the equipment or other property Warning Calls attention to a potential
160. ool will return an acknowledge 0 zero and the string Universal Host Mask software UHM V3 0 If it does not check the Terminal program settings the interface connection and the test tool Optical Port Section 7 5 5 6 Type EX10 H20400000 H80000 and press Enter The test tool will return one of the following acknowledges 0 the RAM is OK 1 syntax error in the typed command 6 the RAM does not properly function Notice that the acknowledge overwites the first character of the message sent to the test tool 7 5 13 Power ON OFF 1 Check TP528 for 3V at power on and OV at power off supplied by D471 If not correct do the Section 7 4 1 tests first Corrective Maintenance 7 7 6 Loading Software 2 Check MS444 ONKEY D471 for when pressing the ON key the signal must be low for 100 150 ms 7 5 14 PWM Circuit 1 Checkthe PWM control signals generated by D471 The signals must be measured on the small component SMD side of the PCA and must show 0 3V pulses with variable duty cycle and a frequency of 100 25 or 6 kHz a CHARCURD junction R442 C431 z 100 kHz b SADCLEV R441 C432 POS D R439 C433 POS D R431 C442 TRIGLEV2D 434 438 TRIGLEVID 433 439 25 kHz c OFFSETA D R438 C434 OFFSETB D R432 C441 6kHz 2 Ifnot correct check TP306 2 for 3 3V used for CHARCURD SADCLEV b TP304 REFPWM1 for 3 3V used for other PWM signals If TP306
161. op C 3 Bottom C 3 Top C 3 Bottom C 3 Bottom B 5 Bottom C 5 Bottom C 4 Bottom C 3 Top C 3 Top A 4 Bottom A 4 Bottom A 4 Bottom B 4 Bottom 8 8 21 123 124 Service Manual 8 22 Ordering Code PCA Location Reference Description Designator R479 R480 R481 R482 R483 R484 R485 R487 R490 R491 R492 R493 R494 R495 R496 R497 R498 R501 R502 R503 R504 R506 R507 R508 R509 R512 R513 R514 R515 R524 R527 R528 R529 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC12H 1 51K1 50 1 10K 50 1 1M TC100 1 82E5 50 1 1M TC100 1 511E TC50 1 10K TC50 1 100K TC50 1 10K TC100 1 42K2 TC50 1 1K TC50 1 100K TC50 1 100K RC12H 1 3K16 RC12H 1 3K16 RC12H 1 OE TC50 1 10K LRCO1 5 0 1 RC12H 1 10 RC12H 1 10 RES 01 1206 5 1E RES 01 1206 590 1E RES 1 1206 5 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP TC50 1 10K RC12H 1 46 4 RC12H 1 2K87 RC12H 1 26K1 TC100 1 3K16 TC100 1 23K7 RC12H 1 100E RC12H 1 147E RC12H 1 34K8 RC12H 1 261K 5322 117 12462 4022 301 22071 4022 301 2
162. op C4 Top 2 1 B 2 Top B 3 Top A 2 Top A 2 Bottom B 2 2 2 2 2 2 2 B 2 Top 2 2 2 3 A 2 Bottom 123 124 Service Manual Ordering Code PCA Location Reference Description Designator C132 C133 C134 C136 C142 C145 C146 C152 C153 C156 C158 C159 C161 C181 C182 C183 C184 C186 C187 C188 C189 C190 C191 C199 C201 C202 C204 C205 C206 C207 C211 CER CHIP CAP 63V 0 25PF 4 7PF CER CHIP CAP 63 5 47PF CER CHIP CAP 63V 5 470PF CER CHIP CAP 63V 10 4 7NF CHIPCAP NPO 0805 5 1NF CHIPCAP NPO 0805 5 1NF CHIPCAP NPO 0805 5 1NF X7R 0805 1096 15NF CHIPCAP X7B 0805 10 22NF CHIPCAP NPO 0805 5 1NF CER CHIP CAP 63V 5 150PF CHIPCAP NPO 0805 5 100PF CER CHIPCAP 25V 20 100NF SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF ALCAP SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF SANYO 10 20 22UF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIPCAP 25V 20 100NF CER CHIP CAP 63V 5 470PF MKC FILM CAP 630 10 22NF SUPPR CAPACITOR 0 1 UF CER CAP 3 15KV 4 599 120PF ALCAP NICHICON 16V 10UF CER CAP 1KV 20 80 4 7NF CER CHIP CAP 63V 5 470PF CER CAP 1 500 0 25 4 7PF 5322 122 32287 5322 122 32452 5322 122 32268 5322 126 10223 5322 126 10511 5322 126 10511
163. ot exceed 1 mA with the mains adapter disconnected A more direct check of correct CPLD functioning is to check for a 61 us negative going pulse at test point TP480 at power off TP480 carries CPLD output signal enablemain Chapter 8 List of Replaceable Parts Title Page 81 Introductio u G nennen UQ S D q u US Sq ua 8 3 8 2 How 10 Oblat PiS 8 3 8 3 Final Assembly Parts 8 4 8 4 Main PCA Unit Parts eere et eee e i t a edi meets 8 6 8 5 Main suada ted te HERE REIR 8 7 8 6 Accessory Replacement Parts sss 8 25 8 7 SVICE Tools uana ed tud 8 25 List of Replaceable Parts 8 8 1 Introduction 8 1 Introduction This chapter contains an illustrated list of replaceable parts for the model 123 or 124 ScopeMeter test tool Parts are listed by assembly alphabetized by item number or reference designator Each assembly is accompanied by an illustration showing the location of each part and its item number or reference designator The parts list gives the following information e number or reference designator for example 122 e indication if the part is subject to static discharge the symbol e Description Ordering code e Location on the Main PCA e g 4 or B 3 Bottom Top Side or Bottom Side of PCA Caution symbol indicates a device that may be damaged by static discharge 8 2 How to Obtain Parts Contact a
164. ottom C 3 Bottom A 4 Top A 4 Top A 4 Top 3 4 3 4 C 4 Bottom D 4 Top A 5 Bottom A 5 Top A 5 Bottom A 5 Bottom D 4 Bottom D 4 Bottom B 5 Bottom B 5 Bottom A 5 Top 5 B 5 Bottom D 5 Top A 5 Top B 2 2 3 8 123 124 Service Manual Ordering Code PCA Location Reference Description Designator N501 N532 N534 N531 N534 N600 R1 R2 R101 R102 R103 R104 R105 R106 R108 R109 R110 R111 R112 R113 R114 R116 R117 R118 R119 R120 R121 R125 R131 R132 P ASIC OQ0256 LOW POW OPAMP LMC7101BIM5X NSC LOW POW OPAMP LMC7101BIM5X NSC LOW POW OPAMP LMC7101BIM5X NSC OPAMP LMC7101BIM5X LAMP CONTROLLER UC3872DW UNI MTL FILM 25 5 220K 0 25W MTL FILM 25 5 220K 0 25W MTL FILM RST MRS25 1 487K MTL FILM RST MRS25 1 487K RESISTOR CHIP 50 1 1M RESISTOR CHIP RC12H 1 26K1 RESISTOR CHIP TC100 1 147E PTC THERM DISC 600V 300 500E RESISTOR CHIP RC11 2A OE RESISTOR CHIP RC12H 1 2K15 RESISTOR CHIP RC12H 1 2K15 RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC12H 1 215E RESISTOR CHIP RC12H 1 215E RESISTOR CHIP RC12H 1 68E1 RESISTOR CHIP RC12H 1 464E RESISTOR CHIP RC11 2 10M RESISTOR CHIP RC12H 1 68E1 RESISTOR CHIP RC12H 1 68E1 RESISTOR CHIP RC12G 1 1M RESISTOR CHIP RC12G 1 100K 5322 209 13143 53
165. p 7a If TP531 gt 2 7 continue at step 7b a Check if charger FET V506 is controlled by 100 kHz 13 Vpp square wave on TP502 FET gate If correct check replace V 506 If not correct check 1 N501 pin 4 TEMPHI relative to X503 pin 3 N501 pin 9 for 200 mV If not correct check R512 and connections 2 N501 pin 5 TEMP relative to X503 pin 3 501 pin 9 for 400 500 mV at about 20 C If not correct check the NTC in the battery pack for 12 at 20 C X503 pins 3 and 5 check connections to N501 3 N501 pin 6 IMAXCHA for 150 mV If not correct check R514 and connections to N501 4 N501 pin 7 VBATHIGH for 1 2V If not correct check R513 and connections to N501 Steps 1 to 4 verify that N501 supplies a 47 current to each of the resistors R512 battery NTC R514 and R513 5 Check N501 pin 9 for the same voltage as on X503 pin 3 sense resistors R504 R506 and R507 6 Ifl 105 above correct then N501 is defective Connect TP531 for a short time max 1 minute to ground and see if the FET gate TP502 now shows a 100 kHz pulse signal If it does not continue at step 7d If it does the CHARCURR control signal is not correct continue at step 7c Check the CHARCURR control signal 7 5 123 124 Service Manual 7 6 The CHARCURR voltage on TP531 is controlled by a pulse width modulated voltage CHARCUR from the D ASIC D471 pin 40 The D ASIC measures the required sig
166. pacitance Measurements Test 4 23 4 5 19 Video Trigger 4 24 Performance Verification 4 4 1 Introduction 4 1 Introduction Warning Procedures in this chapter should be performed by qualified service personnel only To avoid electrical shock do not perform any servicing unless you are qualified to do so The test tool should be calibrated and in operating condition when you receive it The following performance tests are provided to ensure that the test tool is in a proper operating condition If the test tool fails any of the performance tests calibration adjustment see Chapter 5 and or repair see Chapter 7 is necessary The Performance Verification Procedure is based on the specifications listed in Chapter 2 of this Service Manual The values given here are valid for ambient temperatures between 18 C and 28 C The Performance Verification Procedure is a quick way to check most of the test tool s specifications Because of the highly integrated design of the test tool it is not always necessary to check all features separately For example the duty cycle pulse width and frequency measurement are based on the same measurement principles so only one of these functions needs to be verified 4 2 Equipment Required For Verification The primary source instrument used in the verification procedures is the Fluke 5500A If a 5500A is not available you can subst
167. placed Shield3 04724 408 ADCCIK A DA 22144 8 7 6 5 a 3 2 Figure 9 5 Circuit Diagram 5 Digital Circuit 123 124 Service Manual 8 7 6 5 4 3 2 1 3V3SADC V567 L569 REP PE I R508 MBRS340T3 68uH TP571 10k Pos Sees Se 4 1p i BATTERY FLYBACK CONVERTOR theses tL e 3V3GAR 5 kasaae mrt 150uF 150uF C568 t C511 V561 J L562 150uF TP572 100 R570 MBRS340T3 9 1 5r 2 s gt 45VA 1 2 4 5 7 L502 3V3GAR 100k 0561 0572 330E 150uF L563 150uF 573 k 7 T552 V562 MS T503 5
168. plied to a clamp circuit in the T ASIC pin 59 The clamp circuit limits the positive voltage on the unknown capacitance to 0 45 V The protection circuit prevents the T ASIC from being damaged by a voltage applied to Input A during resistance or capacitance measurements If a voltage is applied a current will flow via PTC resistor R172 on the Channel A part V358 V359 V353 V354 to ground The resulting voltage across the diodes is approximately 2V or 15V R354 R356 and V356 V357 limit the voltage on the T ASIC GENOUT output pin 1 The BOOTSTRAP output signal on pin 3 is the buffered GENOUT signal on pin 1 or the buffered SENSE signal on pin 59 It is supplied to the protection diodes via R352 R353 and to protection transistor V356 to minimize leakage currents On the ICAL output of the T ASIC pin 5 a copy of the output current on GENOUT is available The current is supplied to the Channel A C ASIC via R144 ICAL shows the same time temperature drift as the GENOUT measurement current it can be used for internal calibration of the resistance and capacitance measurement function Capacitor C356 is use for hum noise suppression Square Wave Voltage Generator For Probe Adjustment For probe adjustment a voltage generator circuit in the T ASIC can provide a 2 5Vpp 760Hz square wave voltage via the GENOUT output pin 1 to the Input A connector Capacitor C357 is the external timing capacitor for the generator 3 23 123 124 Servi
169. pling mode no fixed time relation between the HOLDOFF signal and the system clock is allowed The RANDOMIZE circuit desynchronizes the HOLDOFF from the clock by phase modulation with a LF ramp signal Trigger qualifying ALLTRIG TRIGQUAL The ALLTRIG signal supplied by the T ASIC contains all possible triggers For normal triggering the T ASIC uses ALLTRIG to generate the final trigger TRIGDT For qualified triggering e g TV triggering the D ASIC returns a qualified e g each n trigger pulse to the T ASIC TRIGQUAL Now the T ASIC derives the final trigger TRIGDT from the qualified trigger signal TRIGQUAL Capacitance measurements ALLTRIG As described in Section 3 3 2 capacitance measurements are based on measuring the capacitor charging time using a known current The ALLTRIG pulse signal represents the charging time The time is counted by the D ASIC Microprocessor The D ASIC includes a microprocessor with a 16 bit data bus The instrument software is loaded in a 16 Mb Flash ROM D474 Circuit Descriptions 3 3 3 Detailed Circuit Descriptions RAM Measurement data and instrument settings are stored in RAM D475 All RAM data will be lost if all power sources battery and power adapter are removed mask ROM The D ASIC has on chip mask ROM If no valid Flash ROM software is present when the test tool 15 turned on the mask ROM software will become active The test tool can be forced to stay in the mask ROM software by
170. pull backwards SHIELDING SLAP LCD P d TABS OF THE SHIELDING BACKLIGHT FLAT CABLE lt PLATE INSIDE BOTH CABLE X SHIELDS KEYPAD FOIL 7 FLEX CABLE A ST8035 ST8035 EPS Figure 6 2 Flex Cable Connectors 6 5 123 124 Service Manual 6 2 6 Removing the Display Assembly Caution Read the Caution statement in Section 6 5 when installing the display assembly An incorrect installation can damage the display assembly There are no serviceable parts in the display assembly Referring to Figure 6 1 use the following procedure to remove the display assembly 1 Remove the main unit see Section 6 2 5 2 The keypad pressure plate item 9 is captivated by four plastic keeper tabs in the top case Press the plate down carefully slide the plate to release it from the tabs and then remove it 3 Remove the display assembly item 6 To prevent finger contamination wear cotton gloves or handle the display assembly by its edge After removing the display assembly the shielding bracket item 5 with the conductive foam strip item 4 the dust seal item 3 and the shielding foil item 2 can be removed 6 2 7 Removing the Keypad and Keypad Foil Referring to Figure 6 1 use the following procedure to remove the keypad and the keypad foil 1 Remove the display assembly see Section 6 2 6 2 Remove the keypad foil Notice the four keypad foil positioning pins in the top case 3 Remove the
171. r u tlm eed ete 2 5 2 3 1 Input A and Input 2 5 2132 IDDUEA uo tros erp e Peer E e ND eder ite 2 8 2 3 3 Advanced Meter Functions sse 2 9 2 4 Cursor Readout Fluke 124 2 9 2 5 Miscellan olis um na anagallis ESQ 2 9 2 6 Environmental eei teens 2 11 2 7 Service and Maintenance 22 22 2 22 402 0 0000000000000000000000000004000 2 12 2 8 Salty iu ele ete refe e ce reete red te re ete bate eee ei ack 2 12 2 9 EMC rte rtp Pete ere te Peer o Pe 2 14 Circuit Descriptions 3 1 3 1 Iritroductio n nu n n a n tette un Sa e nte ee ea ees uha 3 3 3 2 Block Diagram zero doen He DE Pe rt a oae 3 3 3 2 1 Channel A Channel B Measurement Circultfs 3 4 222 Trigger CAT CUI sa ana oet erret ree 3 4 3 2 3 Digital a LS SS L a Tu enne enne nnns 3 5 92 4 nece ert Seed leri Estee asss 3 6 123 124 Service Manual 3 2 5 Start up Sequence Operating Modes 3 7 3 3 Detailed Circuit Descriptions 3 9 3 341 Power Circuit i eror Eee Say A 3 9 3 3 2 Channel A Channel B Measurement Circutts 3 15 3 3 3 Trigger
172. race sensitivity V div The selected trace sensitivity determines the C ASIC attenuation gain factor The reading range is only a readout function it does not change the hardware range or the wave form display 123 124 Service Manual Table 3 3 Voltage Ranges And Trace Sensitivity range 50V 50V 50V 500V 500V 500V 1250V trace div 20V 50V 100V 200V 500V During measuring input voltage measurements gain measurements and zero measurements are done As a result the voltage supplied to the ADC is a multiplexed zero reference reference input voltage signal In ROLL mode however no gain and zero measurements are done Now the ADC input voltage includes only the conditioned input voltage The input voltage is connected to Input A The shield of the input is connected to system ground L via a PTC ground protection resistor If a voltage is applied between the Input A and Input B ground shield or between one of these ground shields and the black COM input the PTC resistor will limit the resulting current The voltage across the PTC resistor is supplied to the C ASIC GPROT input and causes a ground error warning high voltage level on output pin 24 DACTEST Resistance Measurements Channel A The unknown resistance Rx 1s connected to Input A and the black COM input The T ASIC supplies a constant current to Rx via relay contacts K173 and the PTC resistor R172 The voltage across Rx is supplied to a high impedance input
173. rective 40444444 nnn nnn nnn nnn nnns 7 1 7 1 Introductionis i eee ee entente beendet 7 3 7 2 Starting Fault Finding 7 4 1 3 Charger Circuit opere tte 7 4 7 4 Starting with a Dead Test Tool sse 7 6 7 4 1 Test Tool Completely Dead sse 7 6 7 4 2 Test Tool Software Does not Run 7 7 7 4 3 Software Runs Test Tool not Operative 7 7 7 5 Miscellaneous Functions nennen nnns 7 8 7 5 1 Display and Back 7 8 7 5 2 BaeleGonverter teni ee teen es 7 9 SLOW su e drin pes 7 10 1 54 Keyboard tree ta eh PHP eee e 7 11 7 5 5 Optical Port Serial RS232 Interface 7 11 7 5 6 Channel A Channel B Voltage easurements 7 11 7 5 7 Channel Ohms and Capacitance 7 13 7 5 8 Trigger EUnctiOns 7 14 7 5 9 Reference 120210 eene enne 7 15 7 510 Buzzer eed 7 15 7 5 11 Reset ROM u n reet Pete sa 7 16 T5 127 RAM TES aa kusaka au s teste mut tto de ae
174. ress EXIT The test tool will display Calibration data is valid Save data and EXIT maintenance Note Calibration data valid indicates that the calibration adjustment procedure is performed correctly It does not indicate that the test tool meets the characteristics listed in Chapter 2 4 Press YES to save and exit Notes The calibration number and date will be updated only if the calibration data have been changed and the data are valid The calibration data will change when a calibration adjustment has been done The data will not change when just entering and then leaving the maintenance mode without doing a calibration adjustment The calibration number and date will NOT be updated if only the display contrast has been adjusted 5 15 123 124 Service Manual Possible error messages The following messages can be shown on the test tool display WARNING Calibration data NOT valid Save data and EXIT Proceed as follows e Toreturn to the Maintenance mode Press Now press until the display shows WarmingUp CL 0200 IDLE and calibrate the test tool starting at Section 5 5 e Toexit and save the INVALID calibration data Press EP YES The test tool will show the message The test tool needs calibration Please contact your service center at power on The calibration date and number will not be updated A complete recalibration must be done Toexit and maintain the old
175. rror Slope Video on A Modes Standards Polarity Sensitivity 2 2 4 Advanced Scope Functions Characteristics 2 2 3 Dual Input Meter 0 5 divisions or 5 mV 1 5 divisions 4 divisions 0 5 divisions or 5 mV 1 5 divisions 4 divisions 0 5 div max Positive Negative Interlaced video signals only Lines Line Select PAL NTSC PAL SECAM Positive Negative 0 6 divisions sync Display Modes Normal Captures up to 40 ns glitches and displays analog like persistence waveform Smooth Suppresses noise from a waveform Envelope Records and displays the minimum and maximum of waveforms over time Auto Set Continuous fully automatic adjustment of amplitude time base trigger levels trigger gap and hold off Manual override by user adjustment of amplitude time base or trigger level 2 3 Dual Input Meter The accuracy of all measurements is within of reading number of counts from 18 C to 28 C Add 0 1x specific accuracy for each C below 18 C or above 28 C For voltage measurements with 10 1 probe add probe uncertainty 1 More than one waveform period must be visible on the screen 2 3 1 Input A and Input B DC Voltage VDC Ranges Accuracy Turnover Normal Mode Rejection SMR Common Mode Rejection CMRR 500 mV 5 50V 500 1250V 0 5 5 counts 12 counts 760 dB 50 or 60 Hz 1 gt 100 dB DC gt 60 dB 50 60 or 400 Hz 2 5 123 124 Service Manual Full
176. rs due to a series resistance of Cx The pulse width measurement is stopped after crossing the second threshold level th the completes the first part of the cycle Unlimited increase of the capacitor voltage is avoided by the positive clamp in the T ASIC The output of the high impedance buffer in the C ASIC supplies a replica of the voltage across Cx to output pin 23 ADDRESS Via R165 this voltage 15 supplied to a clamp circuit in the T ASIC SENSE pin 59 This clamp circuit limits the positive voltage on Cx to 0 45V Now the second part of the measurement is started by reversing the charge current The capacitor will be discharged in the same way as the charge cycle The time between passing both threshold levels is measured again A clamp limits the minimum voltage on Cx to OV Averaging the results of both measurements cancels the effect of a possible parallel resistance and suppresses the influence of mains interference voltages Table 3 5 shows the relation between the capacitance ranges the charge current and the pulse width at full scale 3 19 123 124 Service Manual Table 3 5 Capacitance Ranges Current and Pulse Width cure sya soo To protect the current source if a voltage is applied to the input a PTC resistor R172 and a protection circuit on the TRIGGER part are provided see Section 3 3 3 Frequency amp Pulse Width Measurements The input voltage is measured as described above From the ADC sa
177. rsion D igital ASIC HS353063 Figure 9 3 Acquisition of ADC samples Figure 9 5 Micro controller uP ROM RAM Figure 9 5 Keyboard and LCD control Figure 9 8 POWER Power supply battery charger P ower ASIC 000256 Figure 9 6 LCD back light voltage converter Figure 9 7 Optical interface input Figure 9 6 All circuits except the LCD unit and the KEYBOARD are located on one Printed Circuit Board PCB called the MAIN PCB The ASIC s are referred to as C ASIC Channel ASIC T ASIC Trigger ASIC P ASIC Power ASIC and D ASIC Digital ASIC 3 3 123 124 Service Manual 3 2 1 Channel A Channel B Measurement Circuits The Channel A and Channel B circuit are similar The only difference is that Channel A can do all measurements whereas Channel B does not provide resistance diode and capacitance measurements Volts and derived measurements e g current with optional probe The input voltage is supplied to the C ASIC via the LF and HF path The C ASIC converts attenuates amplifies the input signal to a normalized output voltage ADC A ADC B which is supplied to the Analog to Digital Converters ADC A and ADC B on the DIGITAL part The D ASIC acquires the digital samples to build the trace and to calculate readings For the HF and LF attenuation section of the C ASIC some external components are required the HF DECade ATTenuator and LF DECade ATTenuator section Resistance continuity and diode measurements Input A only
178. ry charge current control The actual charge current is sensed via resistors R504 R506 507 and filter R509 C509 on pin 9 of the P ASIC IBATP The sense voltage is supplied to the control circuit The required charge current information is supplied by the D ASIC via the CHARCUR Circuit Descriptions 3 3 3 Detailed Circuit Descriptions line and filter R534 C534 to pin 80 A control loop in the control circuit adjusts the actual charge current to the required value The filtered CHARCUR voltage range on pin 80 is 0 2 7V for a charge current from 0 5A to zero A voltage of 0V complies to 0 5A fast charge 1 5V to 0 2A top off charge 2 3V to 0 064 trickle charge 2 7V to no charge If the voltage is gt 3 Volt the charger converter is off V506 permanently non conductive The D ASIC derives the required charge current value from the battery voltage VBAT The P ASIC converts this voltage to an appropriate level and supplies it to output pin 78 BATVOLT The D ASIC measures this voltage via the Slow ADC The momentary value and the voltage change as a function of time dV dt are used as control parameters Charging process If the battery voltage drops below 5 2V and the battery temperature is between 10 and 45 C the charge current is set to 0 5A fast charge From the battery voltage change dV dt the D ASIC can see when the battery 15 fully charged and stop fast charge Additionally a timer in the D ASIC limit
179. s read by the D ASIC the slow ADC See 3 3 2 Power The test tool will give a ground error warning Because of ground loops a LF interference voltage can arise across PTC resistor R106 mainly mains interference when the power adapter is connected To eliminate this LF interference voltage it is buffered also via input GPROT pin 2 and subtracted from the input signal Pin 43 PROTGND is the ground reference of the input buffer Circuit Descriptions 3 3 3 Detailed Circuit Descriptions CALSIG input pin 36 The reference circuit on the TRIGGER part supplies an accurate 1 23V DC voltage to the CALSIG input pin 36 via R141 This voltage is used for internal calibration of the gain and the capacitance measurement threshold levels A reference current Ical is supplied by the T ASIC via R144 for calibration of the resistance and capacitance measurement function For ICAL see also Section 3 3 3 POS input pin 1 The PWM circuit on the Digital part provides an adjustable voltage 0 to 3 3V to the POS input via R151 The voltage level is used to move the input signal trace on the LCD The REFN line provides a negative bias voltage via R152 to create the correct voltage swing level on the C ASIC POS input OFFSET input pin 44 The PWM circuit on the Digital part supplies an adjustable voltage 0 to 3 3V to the OFFSET input via R153 The voltage level is used to compensate the offset in the LF path of the C ASIC The REFN line provide
180. s a negative bias voltage via R152 to create the correct voltage swing level on the C ASIC POS input DACTEST output pin 24 As described above the DACTEST output is used for signaling a ground protect error It can also be used for testing purposes Furthermore the DACTEST output provides a C ASIC reset output signal 1 75V after a power on ADDRESS output pin 23 The output provides a replica of the input voltage to the SENSE line via R165 In capacitance mode the sense signal controls the CLAMP function in the T ASIC See Section 3 3 3 TRACEROT input pin 31 The TRACEROT signal is supplied by the T ASIC It is a triangle sawtooth voltage SDAT SCLK Control information for the C ASIC e g selection of the attenuation factor 15 sent by the D ASIC via the SDA data line The SCL line provides the synchronization clock signal Voltage Measurements Channel A amp Channel B The following description applies to both Channel A and Channel B The input voltage is applied to the HF attenuator inputs of the C ASIC via C104 and to the LF input of the C ASIC via R101 R102 AC DC input coupling relay K171 and R104 The C ASIC conditions the input voltage to an output voltage of 50 mV div This voltage is supplied to the ADC on the Digital part The ADC output data 1s read and processed by the D ASIC and represented as a numerical reading and as a graphical trace Table 3 3 shows the relation between the reading range V and the t
181. s the fast charge time to 6 hours After fast charge 0 2A top off charge current is supplied for 2 hours Then a 0 06A trickle charge current is applied for 48 hours maximum If the battery temperature becomes higher than 50 C the charge current is set to zero Battery temperature monitoring The P ASIC supplies a current to a NTC resistor in the battery pack TEMP pin 5 and of battery It conditions the voltage on pin 5 and supplies it to output pin 79 BATTEMP The D ASIC measures this voltage via the slow ADC It uses the BATTEMP voltage to decide if fast charge is allowed 10 45 C or no charge is allowed at all 10 C gt 50 C Additionally the temperature is monitored by the P ASIC The P ASIC supplies a current to reference resistor R512 TEMPHI pin 4 and compares the resulting TEMPHI voltage to the voltage on pin 5 TEMP If the battery temperature is too high the P ASIC Control circuit will set the charge current to zero in case the D ASIC fails to do this If the battery temperature monitoring system fails a bimetal switch in the battery pack interrupts the battery current if the temperature becomes higher then 70 C Two different battery packs are possible as a standard Fluke 123 is equipped with a Ni Cd battery Fluke 124 has a Ni MH battery that allows a longer operation time Both instruments will also function on a battery pack different from the standard type The installed battery type is read by the D ASIC
182. stall the keypad pressure plate Press the plate firmly and slide it under the four plastic keeper tabs in the top case Install the main PCA unit and re attach the cables Secure the flat cables in the connectors with the connector latches Keep the backlight wires twisted to minimize interference voltages Insert the shielding flap below the main PCA shielding plate Put the bottom case and the top case together at the flat cable side and hinge the cases to each other This ensures the keypad foil flat cable is folded correctly Install the battery pack and the battery door see figure 6 5 DUST SEAL SHIELDING FOIL TOPCASE INTERCONNECTOR PART SHIELDING BRACKET INTERCONNECTOR PART DISPLAY ASSEMBLY SHIELDING BRACKET 578185 ST8185 EPS Figure 6 4 Mounting the display shielding bracket ST8197 EPS Figure 6 5 Battery pack installation 6 9 123 124 Service Manual Chapter 7 Corrective Maintenance Title Page 7 1 Introductio i Bieter oe E ce 7 3 7 2 Starting Fault Finding iut c ees ttn et rece ci ee He ne redes 7 4 T Charger dele beste end 7 4 7 4 Starting with a Dead Test 7 6 7 4 1 Test Tool Completely 2 22 40012410 0 000600000000000000000000504 7 6 7 4 2 Test Tool Software Does not 7 7 7 4 3 Software Runs Test Tool not Operative
183. stment a voltage generator circuit in the T ASIC can provide a square wave voltage via the GENOUT output to the Input A connector The T ASIC contains opamps to derive reference voltages from a 1 23V reference source The gain factors for these opamps are determined by resistors in the REF GAIN circuit The reference voltages are supplied to various circuits The T ASIC also controls the Channel A and B AC DC input coupling relays and the relays Control data for the T ASIC are provided by the D ASIC via the SDAT and SCLK serial communication lines 3 2 3 Digital Circuit The D ASIC includes a micro processor ADC sample acquisition logic trigger processing logic display and keyboard control logic I O ports and various other logic circuits The instrument software is stored in the FlashROM the RAM is used for temporary data storage The RESET ROM circuit controls the operating mode of the FlashROM reset programmable operational For Voltage and Resistance measurements the conditioned Input A Input B voltages are supplied to the ADC A and ADC B ADC The voltages are sampled and digitized by the ADC s The output data of the ADC s are acquired and processed by the D ASIC For capacitance measurements the ALLTRIG signal generated by the T ASIC is used The D ASIC counts the ALLTRIG signal pulse width which is proportional to the unknown capacitance The DPWM BUS Digital Pulse Width Modulation supplies square wave sig
184. stor V569 The voltage is controlled by the VGARDRV signal supplied by the P ASIC pin 69 The current sense voltage across R580 is supplied to pin 70 VGARCURR The voltage 3 V3GAR is sensed on pin 66 for regulation The internal regulator in the P ASIC regulates the 3 V3GAR voltage and limits the current Fly Back Converter When the test tool is turned on the D ASIC makes the PVRONOFF line P ASIC 62 high Then the self oscillating Fly Back Converter becomes active It is started up by the internal 100 kHz oscillator that is also used for the Charger Converter circuit First the FLYGATE signal turns FET V554 on see Figure 3 5 and an increasing current flows in the primary transformer winding to ground via sense resistor R551 If the voltage FLYSENSP across this resistor exceeds a certain value the P ASIC turns FET V554 off Then a decreasing current flows in the secondary windings to ground If the windings are empty all energy transferred the voltage VCOIL sensed by the P ASIC pin 52 is zero and the FLYGATE signal will turn FET V554 on again Primary current V554 FLYGATE SIGNAL V554 OFF Figure 3 5 Fly Back Converter Current and Control Voltage The output voltage is regulated by feeding back a part of the 3V34A output voltage via R552 R553 R554 to pin 54 VSENS This voltage is referred to a 1 23V reference voltage Any deviation of the 3V3A voltage from the required 3 3V changes the current
185. t Voltage Continuity CONT Beep Measurement Current Detection of shorts of Diode Maximum Voltage 20 5 mA open circuit Accuracy Measurement Current Polarity Capacitance CAP Ranges Accuracy Full Scale Reading Measurement Current Measurement principle 2 8 100 counts Ato B BtoA 0 to 359 degrees 1 degree 1 count 1 degree 5000 5 50 500 5 MQ 30 0 6 5 counts 5000 counts 3000 counts 0 5 mA to 50 nA decreases with increasing ranges lt 4V 30Q 5Q in 50Q range 0 5 mA gt 1 ms gt 2 8V lt 4V 2 5 counts 0 5 mA on input A on COM 50 nF 500 nF 5 50 uF 500 uF 2 10 counts 5000 counts 5 to 0 5 mA increases with increasing ranges Dual slope integrating measurement with parasitic serial and parallel resistance cancellation 2 3 3 Advanced Meter Functions Zero Set Fast Normal Smooth Meter settling time Fast Meter settling time Normal Meter settling time Smooth Touch Hold on A TrendPlot Fixed Decimal Point 2 4 Cursor Readout Fluke 124 Sources Single Vertical Line Dual Vertical Lines Dual Horizontal Lines Rise or Fall Time Accuracy 2 5 Miscellaneous Display Size Resolution Characteristics 2 4 Cursor Readout Fluke 124 Set actual value to reference 15 lus to 10 ms div 2s lus to 10 ms div 10s lus to 10 ms div Captures and freezes a stable measurement result Beeps
186. t tool d Wess Opening the case may expose hazardous voltages For example the voltage for the LCD back light fluorescent lamp is gt 400V Always disconnect the test tool from all voltage sources and remove the batteries before opening the case If repair of the disassembled test tool under voltage is required it shall be carried out only by qualified personnel using customary precautions against electric shock If the test tool fails first verify that you are operating it correctly by reviewing the operating instructions in the Users Manual or Getting Started Manual When making measurements for fault finding you can use the black COM input banana jack or the metal shielding on the Main PCA unit as measurement ground To access the Main PCA for measurements proceed as follows 1 Remove the Main unit see Section 6 2 5 Disassemble the Main unit see Section 6 3 3 Connect the Display Assembly flat cable the Backlight cable and the Keypad Foil flex cable to the Main PCA unit Position the Keypad on the Keypad foil See Figure 7 1 The Test tool without the case is operative now 4 Power the PCA via the Power Adapter and or battery pack Watch out for short circuiting due to metal parts on your desk s TIME ns SCOPE MENU USER SAVE OPTIONS PRINT REPAIR3 BMP Figure 7 1 Operative Test Tool without Case 7 3 123 124 Service Manual 7 2 Starting Fault Finding After each step continue
187. ted unless otherwise stated The calibration adjustment screen shows the actual calibration step name and number and its status Cal Name CL nnnn Status Calibration step nnnn Status can be IDLE valid After re entering this step the calibration process 15 not started The calibration data of this step are valid This means that the last time this step was done the calibration process was successful It does not necessarily mean that the unit meets the specifications related to this step IDLE invalid After re entering this step the calibration process is not started The calibration data are invalid This means that the unit will not meet the specifications if the calibration data are saved BUSY bbb Calibration adjustment step in progress progress for Input A and Input B READY Calibration adjustment step finished Error xxxx Calibration adjustment failed due to wrong input signal s or because the test tool is defective The error codes xxxx are shown for production purposes only Functions of the keys 1 4 are FT PREV select the previous step F2 NEXT select the next step CAL start the calibration adjustment of the actual step Fa EXIT leave Maintenance mode Readings and traces After completing a calibration step readings and traces are shown using the new calibration data 5 5 123 124 Service Manual 5 4 Contrast Calibration Adjustment After entering the Maintenan
188. tery charging process the P ASIC senses and buffers various battery signals as e g temperature TEMP voltage BATVOLT current IBAT Via the SLOW ADC various analog signals can be measured by the D ASIC Involved signals are battery voltage BATVOLT battery type IDENT battery temperature TEMP battery current BATCUR LCD temperature LCDTEMP from LCD unit and 3 test output pins of the C ASIC s and the T ASIC DACTEST The signals are used for control and test purposes The BACK LIGHT CONVERTER generates the 400V supply voltage for the LCD fluorescent back light lamp If the lamp is defective a 1 5 kV voltage can be present for 0 2 second maximum The brightness is controlled by the BACKBRIG signal supplied by the D ASIC Serial communication with PC or printer 15 possible via the RS232 optically isolated interface This interface is also used for external trigger input using the Isolated Trigger Probe The P ASIC buffers the received data line RXDA and supplies the buffered data RXD to the D ASIC The transmit data line TXD is directly connected to the D ASIC A linear regulator in the P ASIC derives 12V voltage from the power adapter voltage The 12V is used as programming voltage for the Flash EPROM on the Digital part Circuit Descriptions 3 2 Block Diagram 3 2 5 Start up Sequence Operating Modes The test tool sequences through the following steps when power is applied see also Figure 3 2 l
189. test tool to the 5500A as for the previous test see Figure 4 4 2 Select the following test tool setup e Turn Input B on if not already on e Press to select auto ranging AUTO in top of display Do not press EC anymore e Using ES change the sensitivity to select manual sensitivity ranging and lock the Input B sensitivity on 200 mV div Press to open the SCOPE INPUTS menu Press E to open the TRIGGER menu and choose 4 10 Performance Verification 4 4 5 Input A and Input B Tests INPUT SCREEN UPDATE FREE RUN AUTO RANGE gt 15HZ Set the 5500A to source a leveled sine wave of 1 2V peak to peak 50 kHz SCOPE output MODE levsin Adjust the amplitude of the sine wave to 6 divisions on the test tool display Set the 5500A to 20 MHz Fluke 123 or 40 MHz Fluke 124 without changing the amplitude Observe the Input B trace check to see if it is 2 4 2 divisions When you are finished set the 5500A to Standby Note The lower transition point is tested in Section 4 5 11 4 5 7 Input B Trigger Sensitivity Test Proceed as follows to test the Input B trigger sensitivity l 2 Connect the test tool to the 5500A as for the previous test see Figure 4 4 Select the following test tool setup Turn Input B on if not already on Press to select auto ranging AUTO in top of display Do not press anymore e Using change the sensitivity to select manual sensitivit
190. th 3 20 3 6 D ASIC PWM 5 12202 aaa u P ua sa 3 28 4 Input A B Frequency Measurement Accuracy Test 4 9 4 2 Volts DC Measurement Verification 4 16 4 3 Volts AC Measurement Verification een 4 17 4 4 Input A and B AC Input Coupling Verification Points 4 18 4 5 Volts Peak Measurement Verification 4 19 4 6 Phase Measurement Verification Points eee 4 19 4 7 DC and V AC High Voltage Verification Tests 4 2 4 8 Resistance Measurement Verification Points esse eee 4 22 4 9 Capacitance Measurement Verification Points essen 4 24 5 1 Gain Calibration Points Fast essen 5 8 5 2 HF Gain Calibration Points Slow essere 5 9 5 3 Volt Gain Calibration Points lt 300V 5 11 5 4 Ohm Gain Calibration Points 5 13 fal Starting Fault Pimdin gs inttr tette ree e er eee rt US er D tse 7 4 List of Figures Figure Title Page 2 2 Max Input Voltage v s Frequency for VP40 10 1 Voltage 2 13 3 1 Fluke 123 Block
191. the 5500A is in Standby Select the following test tool setup e Press to open the A MEASUREMENTS menu and choose MEASURE on A B CAP Press to select auto ranging AUTO in top of display e Press to open the INPUT A MEASUREMENTS menu e Press the select the METER A OPTIONS MENU and choose SMOOTHING NORMAL ZERO REF ON The ZERO REF function is used to eliminate the capacitance of the test leads Set the 5500A to the first test point in Table 4 9 Use the 5500A COMP OFF mode Observe the Input main reading and check to see if it is within the range shown under the appropriate column Continue through the test points When you are finished set the 5500A to Standby Remove all test leads from the test tool to check the zero point Press to open the INPUT A MEASUREMENTS menu Press IEE the select the METER A OPTIONS MENU and choose SMOOTHING ll NORMAL ZERO REF B OFF 10 Observe the Input A reading and check to see if it is between 00 00 and 00 10 nF 4 23 123 124 Service Manual Table 4 9 Capacitance Measurement Verification Points 39 10 to 40 90 300 nF 293 0 to 307 0 30 uF 29 30 to 30 70 293 0 to 307 0 0 00 00 to 00 10 remove test tool input connections see steps 7 10 4 5 19 Video Trigger Test Only one of the systems NTSC PAL or SECAM has to be verified Proceed as follows 1 Connect the test tool to the VIDEO output of the TV Sign
192. the Power part Check TP151 POS A and 251 POS B for about 1 1V trace at mid screen 0 4V trace at top of screen 1 8V trace at bottom of screen If not correct check the PWM circuit in the Digital Circuit Check TP152 OFFSET A and TP252 OFFSET B for about 1 1V Check TP303 REFN for 1 2V Check TP153 DACTESTA and TP253 DACTESTB for If TP153 is the C ASIC is in the reset state 200 mV div fixed sensitivity check SDAT and SCLK see step 15 Check MIDADCA N101 28 and TP255 MIDADCB N201 28 for about 1 2V Press open SCOPE INPUTS menu Press E to open the SCOPE OPTIONS menu and select SCOPE NORMAL WAVEFORM MODE NORMAL Select a time base of 20 ms div Corrective Maintenance 7 7 5 Miscellaneous Functions 13 Check N101 31 N201 31 TRACEROT supplied by T ASIC N301 for the signals shown below typical example at 20 ms div 0 8V 0 8V 5 100 ro If not correct check TP432 RAMPCLK for 200 ns pulses TP332 RAMPCLK for 0 6V 200 ns pulses TP331 RSTRAMP for 0 6V pulses with varying pulse with and repetition rate pulses are supplied by D ASIC D471 14 Check TP310 REFATT for alternating 1 2V and 1 2V pulses The repetition frequency depends on the time base and 15 for example 500 ms at 20 ms div 15 Check the SCLK and SDAT lines for 3 3V pulse bursts C ASIC 25 and 26 These signals can also be ch
193. tinue through the test points 6 When you are finished set the 5500A to Standby Table 4 5 Volts Peak Measurement Verification Points 5500A output Vrms sine 5500A Frequency Reading A B 4 5 13 Input A and B Phase Measurements Test Proceed as follows 1 Connect the test tool to the 5500A as for the previous test see Figure 4 5 2 Select the following test tool setup Press to select auto ranging AUTO in top of display Press to open the INPUT A MEASUREMENTS menu and choose MEASURE on A PHASE Press WEN to open the INPUT B MEASUREMENTS menu and choose INPUT B MEASURE on B PHASE Using WD select 1V div for input A and B 3 Set the 55004 to source a sine wave to the first test point in Table 4 6 NORMAL output WAVE sine 4 Observe the Input and Input B main reading and check to see if it is within the range shown under the appropriate column Continue through the test points 6 When you are finished set the 5500A to Standby Table 4 6 Phase Measurement Verification Points 5500A output Vrms sine 5500A Frequency Reading A B 4 19 123 124 Service Manual 4 5 14 Input A and B High Voltage AC DC Accuracy Test Warning Dangerous voltages will be present on the calibration source and connecting cables during the following steps Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool Proce
194. tion Points 000 0 to 000 5 00 4000 397 1 to 402 9 4 5 16 Continuity Function Test Proceed as follows 1 Connect the test tool to the 5500A as for the previous test see Figure 4 7 2 Select the following test tool setup Press to select auto ranging AUTO in top of display e Press to open the INPUT A MEASUREMENTS menu and choose MEASURE on CONT Set the 5500A to 250 Use the 55004 2 wire mode Listen to hear that the beeper sounds continuously Set the 5500A to 350 Listen to hear that the beeper does not sound When you are finished set the 5500A to Standby dem 4 22 Performance Verification 4 4 5 Input A and Input B Tests 4 5 17 Diode Test Function Test Proceed as follows to test the Diode Test function l 2 Geom ta Connect the test tool to the 5500A as for the previous test see Figure 4 7 Press to open the INPUT A MEASUREMENTS menu and choose MEASURE on A DIODE Set the 5500A to 1 Use the 5500A 2 wire mode Observe the main reading and check to see if it is within 0 425 and 0 575V Set the 55004 to 1V DC Observe the main reading and check to see if it is within 0 975 and 1 025V When you are finished set the 5500A to Standby 4 5 18 Capacitance Measurements Test Proceed as follows l 00 Connect the test tool to 5500 as for previous test see Figure 4 7 Ensure that
195. tna toes tms 7 16 1 3 13 Power ON OFF ananman aaa Suha e eek 7 17 TS DA PME t rd 7 17 7 5 15 Randoimize eee ee erteilen 7 17 7 6 Loading Software esses ener innen eene nennen 7 17 7 7 Configuration of CPLD chip D470 sse 7 17 Circuit Di gr Mm S M MH 9 1 9 1 Introductions a nmay ashami 9 1 9 2 Schematic 9 2 Modifications eiaeia aeiae eenaa Kaanaan aaea aaae E aaa 10 1 10 1 Software modifications eee nennen 10 1 10 2 Hardware modifications 000 10 1 List of Tables Table Title Page 2 1 No Visible Trace Disturbance nienn annaa hna nennen ener nennen 2 14 2 2 Trace Disturbance lt 10 enne nennen ener 2 14 2 3 Multimeter Disturbance lt 1 g us ener ener nnns 2 14 3 1 Fluke 123 Main Blocks esses nennen nennen ersten Qa ka uquy 3 3 3 2 Fluke 123 Operating Modes essere 3 9 3 3 Ranges And Trace 3 18 3 4 Ohms Ranges Trace Sensitivity and Current aaa 3 18 3 5 Capacitance Ranges Current and Pulse Wid
196. to 61 52 MHz Note Duty Cycle and Pulse Width measurements are based on the same principles as Frequency measurements Therefore the Duty Cycle and Pulse Width measurement function will not be verified separately 4 5 5 Input B Frequency Measurement Accuracy Test Proceed as follows to test the Input B frequency measurement accuracy 1 Connect the test tool to the 5500A as shown in Figure 4 4 4 9 123 124 Service Manual FLUKE 5500A CALIBRATOR ST8005 WMF Figure 4 4 Test Tool Input B to 5500A Scope Output 500 2 Select the following test tool setup Press select auto ranging AUTO top of display e Press en to open the INPUT B MEASUREMENTS menu and choose INPUT B MEASURE on B Hz Press 21 to open the SCOPE INPUTS menu Press to open the TRIGGER menu and choose INPUT SCREEN UPDATE FREE RUN AUTO RANGE gt 15HZ 3 Setthe 55004 to source leveled sine wave of 600 mV peak to peak SCOPE output MODE levsin 4 Setthe 5500A frequency according to the first test point in Table 4 1 Observe the Input B main reading on the test tool and check to see if it is within the range shown under the appropriate column 6 Continue through the test points When you are finished set the 5500A to Standby 4 5 6 Input B Frequency Response Upper Transition Point Test Proceed as follows to test the Input B frequency response upper transition point 1 Connect the
197. tom B 3 Bottom A 3 Bottom A 3 Bottom A 2 Top A 3 Bottom B 3 Bottom B 2 Bottom A 2 Bottom B 3 Bottom A 2 Bottom C 2 Top 8 123 124 Service Manual Ordering Code PCA Location Reference Description Designator MTL FILM MRS25 1 487K R202 R203 R204 R205 R206 R208 R209 R210 R211 R212 R213 R214 R216 R217 R218 R219 R220 R221 R225 R231 R232 R233 R234 R236 R237 R238 R239 R240 R241 R242 R243 R246 R251 RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP TC50 1 1M RC12H 1 26K1 TC100 1 147E PTC THERM DISC 600V 300 500E RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RESISTOR CHIP RC11 2A OE RC12H 1 2K15 RC12H 1 2K15 RC11 2 10M RC11 2 10M RC11 2 10M RC11 2 10M RC12H 1 215E RC12H 1 215E RC12H 1 68E1 RC12H 1 464E RC11 2 10M RC12H 1 68E1 RC12H 1 68E1 RC12G 1 1M RC12G 1 100K RC12G 1 10K RC12G 1 1K RC 02G 1 100E RC 02H 1 56K2 RC 02H 1 56K2 RC 02H 1 56K2 RC 02H 1 56K2 RC12G 1 215K RC12G 1 147K RC12G 1 909K RC12H 1 215K TC50 1 100K 4822 050 24874 4022 301 22441 5322 117 12448 4022 301 21631 5322 116
198. trigger icon T 4 12 10 11 12 13 14 15 16 17 18 19 Performance Verification 4 4 5 Input A and Input B Tests Press to open the SCOPE INPUTS menu Press 227 to open the SCOPE OPTIONS menu and choose SCOPE MODE SINGLE SHOT WAVEFORM MODE NORMAL Set the 5500A to source 0 4V DC Verify that no trace is shown on the test tool display and that the status line at the display bottom shows Wait A T If the display shows the traces and status Hold A then press E to re arm the test tool for a trigger Increase the 5500A voltage slowly in 0 1V steps using the 55004 EDIT FIELD function until the test tool is triggered and the traces are shown Verify that the 5500A voltage is between 1 5V and 2 5V when the test tool is triggered To repeat the test start at step 3 Set the 5500A to Standby Press to clear the display Press E to enable the arrow keys for Trigger Level and Slope adjustment Using 90 select negative slope triggering L Using set the trigger level to 2 divisions from the screen center For negative slope triggering the trigger level is the bottom of the trigger icon L Set the 55004 to source 43V DC Verify that no trace is shown on the test tool display and that the status line at the display bottom shows Wait A L If the display shows the traces and status Hold A L then press to re arm the test tool for a trigger Decrease the
199. triggered now 12 When you are finished set the 5500A to Standby 4 5 8 Input A and B Trigger Level and Trigger Slope Test Proceed as follows 1 Connect test tool to the 5500A as shown in Figure 4 5 FLUKE 5500A CALIBRATOR PM9091 001 1 5m Z PM9093 9092 001 0 5m Figure 4 5 Test Tool Input A B to 5500A Normal Output ST8001 WMF 2 Select the following test tool setup Turn Input B on if not already on Using EE change the sensitivity to select manual sensitivity ranging and lock the Input and Input B sensitivity on 1 V div Move the Input A and Input B ground level indicated by zero icon to the center grid line Proceed as follows Press E to enable the arrow keys for moving the Input A ground level Press 2271 to enable the arrow keys for moving the Input B ground level Using the G amp keys move the ground level Using CI change the time base to select manual time base ranging and lock the time base on 10 ms div Press to open the SCOPE INPUTS menu Press open the TRIGGER menu and choose INPUT SCREEN UPDATE FREE RUN AUTO RANGE gt 15HZ Press to enable the arrow keys for Trigger Level and Slope adjustment e Using 90 select positive slope triggering trigger icon Using 622 C2 set the trigger level to 2 divisions from the screen center For positive slope triggering the trigger level is the top of the
200. ts PCA Location Reference Description Designator Led Holder for H521 and H522 1 2 3 X100 B401 B402 B403 C101 C102 C104 C105 C106 C107 C111 C112 C113 C114 C116 C117 C118 C119 C121 C122 C123 C124 C131 Screw for Input Banana Jack Assembly Input Banana Jack Assembly without Input A B and COM O rings see Figure 8 2 including rersistors R1 and R2 QUARTZ CRYSTAL 32 768KHZ SEK QUARTZ CRYSTAL 3 6864MHZ KDK QUARTZ CRYSTAL 50MHZ KDK MKC FILM 630V 10 SUPPR CAPACITOR 0 1 UF CER CAP 3 15KV 5 ALCAP NICHICON 16V CER CAP 1KV 20 80 4 7NF CER CHIP CAP 63V 5 470PF CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CAP 1 500V CER CHIP CAP 63V 0 25PF 0 82PF 0 25 4 7PF 0 25 4 7PF 0 25 4 7PF 0 25 4 7PF 0 25PF 4 7PF 2 10PF 0 25 4 7PF 0 25 4 7PF 2 33PF 0 25 4 7PF 0 25 4 7PF 2 33PF 22NF 120PF 10UF 5322 255 41213 5322 502 14362 5322 264 10311 5322 242 10302 4022 303 20201 4022 106 00021 5322 121 10616 5322 121 10527 5322 126 14046 5322 124 41979 5322 126 13825 5322 122 32268 5322 122 33082 5322 122 33082 5322 122 33082 5322 122 33082 5322 122 33082 4822 122 31195 5322 122 33082 5322 122 33082 4822 122 31202 5322 122 33082 5322 122 33082 4822 122 31202 5322 126 10786 B5 Bottom C4 T
201. ttery is completely charged then it is completely discharged the test tool is powered by the battery only and the power adapter must be connected and then it is completely charged again VGARVAL L Idle mode VGARVAL H Off mode TURN ON or MAINVAL H Flash ROM NOT OK Mask Active Mask StartUp OR mad Flash ROM OK 4 lt amp TURN ON TURN OFF Extern StartUp MAINVAL L amp TURN OFF BATTVOLT lt 4V Software TURN ON amp gt 4 amp MAINVAL L TURN OFF amp MAINVAL H MAINVAL H TURN OFF Charge Mode Operational Mode TURN ON amp BATTVOLT lt 4V Operational amp Charge Mode or AutoShutDown Battery refresh or TURN OFF TURN ON Figure 3 2 Fluke 123 124 Start up Sequence Operating Modes Table 3 2 shows an overview of the test tool operating modes Circuit Descriptions 3 3 3 Detailed Circuit Descriptions Table 3 2 Fluke 123 124 Operating Modes a Idle mode No power adapter and no No power adapter and battery no activity Off mode No power adapter connected battery P ASIC amp D ASIC powered installed test tool off VBAT amp 3V3GAR Mask active mode No valid instrument software or and gt key Mask software runs pressed when turning on Chargemode Power adapter connected and test tool off Batteries will be Batteries will be charged
202. when stable Touch Hold works on the main meter reading with threshholds of 1 Vpp for AC signals and 100mV for DC signals Graphs meter readings of the Min and Max values from 15 s div 120 seconds to 2 days div 16 days with time and date stamp Automatic vertical scaling and time compression Displays the actual and Minimum Maximum or average AVG reading Possible by using attenuation keys Average Min Readout Average Min Max and Time from Start of Readout in ROLL mode instrument in HOLD Min Max and Time from Start of Readout in TRENDPLOT mode instrument in HOLD Peak Peak Time Distance and Reciprocal Time Distance Readout Average Min Max and Time Distance Readout in ROLL mode instrument in HOLD High Low and Peak Peak Readout Transition Time 0 Level and 100 Level Readout Manual or Auto Leveling Auto Leveling only possible in Single Channel Mode As Oscilloscope Accuracy 72 x 72 mm 2 83 x 2 83 in 240 x 240 pixels 2 9 123 124 Service Manual Waveform display Vertical Horizontal Backlight A Power External Input Voltage Power Input Connector Internal Battery Pack BP120 Fluke 123 Battery Power Operating Time Charging Time Internal Battery Pack BP130 Fluke 124 Battery Power Operating Time Charging Time Allowable ambient temperature during charging Memory Number of Screen Setup Memories Fluke 123 Fluke
203. with the next step unless stated otherwise Power the test tool by the battery pack only then by the power adapter only 1 The test tool operates with the power adapter but not with the battery only install a charged battery VBAT gt 4 and check the connections between the battery and the test tool X503 R504 R506 R507 2 The test tool operates with the battery pack but not with the power adapter only and the battery pack 1s not charged by the test tool continue at 7 3 Charger Circuit 3 The test tool operates neither with the battery pack nor with the power adapter continue at 7 4 Starting with a Dead Test Tool 4 Particular functions are not correct continue at 7 5 Miscellaneous Functions Table 7 1 Starting Fault Finding NOT OK Battery pack connector sense resistors NOT OK See Section 7 3 Charger Circuit NOT OK NOT OK See Section 7 4 Starting with a Dead Test Tool Partly OK Partly OK See Section 7 5 Miscellaneous Functions 7 3 Charger Circuit 1 Power the test tool by the power adapter only 2 Check TP501 for 15 20V If not correct check the power adapter input circuit X501 Z501 V501 C501 3 Check TP504 VBAT for about 7 5V If not correct check R501 V504 V503 L501 C503 Check TP502 for a 100 kHz 13Vpp pulse signal if correct or low check if TP504 is shorted to ground and check V506 4 Install a charged battery The voltage at TP504 will be now about 5V 5 Check N501 pin 18
204. y ranging and lock the Input B sensitivity on 200 mV div Press to open the SCOPE INPUTS menu Press E to open the TRIGGER menu and choose INPUT SCREEN UPDATE FREE RUN AUTO RANGE gt 15HZ Set the 5500A to source a 5 MHz leveled sine wave of 100 mV peak to peak SCOPE output MODE levsin Adjust the amplitude of the sine wave to 0 5 division on the display Verify that the signal is well triggered If it is not press E to enable the up down arrow keys for Trigger Level adjustment adjust the trigger level and verify that the signal will be triggered now The trigger level is indicated by the trigger icon J Set 5500A to source 25 MHz Fluke 123 or 40 MHz Fluke 124 leveled sine wave of 400 mV peak to peak Adjust the amplitude of the sine wave 1 5 divisions on the test tool display Verify that the signal is well triggered If it is not press E to enable the up down arrow keys for Trigger Level adjustment adjust the trigger level and verify that the signal will be triggered now Set the 5500A to source a 40 MHz Fluke 123 or 60 MHz Fluke 124 leveled sine wave of 1 8V peak to peak 10 Adjust the amplitude of the sine wave to exactly 4 divisions on the test tool display 123 124 Service Manual 11 Verify that the signal is well triggered If it is not press E to enable the up down arrow keys for Trigger Level adjustment adjust the trigger level and verify that the signal will be

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