Tek YT-1_YT-1S INST
Contents
1. 4 YT 1 YT IS Chart Recorder 5 1 Theory of Operations Circuit Description Bit Map Data Matrix Operation Bit Map Description Bit map operation permits the host to control the 384 individual bits 48 bytes that make up the recorder print field This allows any combination of dots to be printed including alpha numerical characters and graphics All print data should be sent in the form of bytes 1 byte 8 bits The state of the dots printed is controlled by the state of the data bits sent by the host to the recorder A 0 will turn an element off and a 1 will turn an element on when a row is printed The bit mapping is done on rows of the page There are 8 rows per millimeter and 48 bytes per row The resolution is thus 1 8 mm across the page Bit Map Operation The recorder uses a thermal printhead with 384 individual elements 48 bytes The bytes of digital data are shifted through the printhead from left to right As the new bytes of data are shifted in by the host the old bytes remaining from the previous line of print data are shifted out one by one To replace all the old data bytes with new ones the host must completely refill the printhead each time a new line is to be printed If the host does not completely refill the printhead with a new line of data before printing the remaining old data will be printed out with the new data The new data will also be shifted to the left of its proper print field2. General Interrupt Operations The recorder generates an interrupt request IR each time the record push button is depressed This signal is active low This signal does not disable communication between the host and the recorder thus allowing read and write operations to continue even though an interrupt request has been received General Command Operations All commands are sent from the host to the recorder over the address interface bus A0 A3 All commands are accompanied by a low strobe of the recorder select line from the host RS All read commands are accompanied by a low strobe of the data read line from the host RD All write commands are accompanied by a low strobe at the date write line from the host WR YT 1 YT 1S Chart Recorder 5 7 Theory of Operations Read Command Operations The recorder has the following read command operations Address OH Address 1H Address 2H FH Not used by recorder Identify code for recorder Recorder 01H Status codes for recorder The status code bits are formatted as follows DO D3 Not used by recorder D4 Indicates recorder ready to accept advance command 0 Recorder not ready D6 1 Indicates recorder ready to accept print command 0 Recorder not ready D7 0 Indicates recorder fault exists 1 No fault exists Write Command Operations The recorder has the following write command operations Address 0H Reset recorder to quiescent sta
3. The host should never attempt to turn on more than 25 of the dots in the print field at one time If the host s desired pattern requires the energizing of more that 25 of the dots on a single line the solution is to divide the pattern into smaller parts These smaller parts can then be loaded and printed one at a time until the complete pattern is printed The host can then move on to the next line of print data by advancing the paper Bits will be turned on as shown YT 1 YT 1S Chart Recorder Theory of Operations Direction of Paper Travel gt BYTE 1 on 3 3 this side 3 3 E Thermal Paper 3 So lt E 3 S zm zm 2 zm a 3 3 Printed side of paper BYTE 48 on lt this side Individual Write Command Operation Load a Byte of Print Data When this write command operation is used the recorder will take the data byte 8 bits that the host has placed on the data bus and shift it out to the recorder printhead This command should only be used when the recorder is ready to accept data i e the Accept Data status line D5 1 Use of this command will cause the Accept Data status line to be disabled D5 0 This status line will not be re enabled until the recorder is ready to accept another data byte No byte should be sent until this line goes high again 05 1 Latch a Line of Print Data This write command operation should precede the print command When the host h
4. The thermal printhead of the YT 1 YT 1S has 384 print elements Because of power economy not all of the elements are turned on at the same time When printing only 40 elements or dots of the printhead are activated at a time Forty dots equals a segment If it is intended to make the dots darker elements can be turned on more than once analogous to a double strike on a mechanical printer 1 Using MENU and POSITION access LCD chart in the Chart Diagnostics menu YT 1 YT 1S Chart Recorder 6 1 Calibration nn 000 ft auto 2 When adjusted the left knob will adjust the number of dots the YT 1 YT 1S will print per segment ranging from 13 to 41 The effect of this adjustment is subtle 3 When adjusted the right Vp knob will adjust the number of prints or strikes per segment This adjustment is quite dramatic resulting in a much darker or lighter chart and a corresponding change in printer speed When the parent instrument POWER is turned on the printing characteristics will default to 40 elements per segment and one print per segment This diagnostic also takes the place of the PRINT push button If the button should become defective simply run the LCD chart diagnostic and current screen will be printed 6 2 YT 1 YT 1S Chart Recorder Calibration Paper Skew If the paper tends to run up to the top or down to the bottom of th
5. Bottom Troubleshooting Troubleshooting Flow Charts The following charts are provided to aid you in troubleshooting electrical and mechanical problems with the YT 1 YT 1S Additional information follows the flow charts YT 1 YT 1S Chart Recorder 7 5 Maintenance N bar whenpr nteris OR Print is not sguare with the paper Y Y Run recorder at least four times to allow See the orthogonality adjustment in the paper to realign the maintenance section Y YES Is it correct now Unit functions Y NO Y See the paper skew adjustment in the maintenance section Instrument shuts down when PRINT button is pressed Y s unit running off o Be sure the battery is charged battery use AC power Y NO Unplug J2 nit still shuts down wl PRINT is pressed YES Y Replace the print head assembly Plug J2 back in and unplug J3 Y nit still shuts down w NO Measure resistance between P3 1 amp P3 2 PRINT is pressed and between P3 3 amp P3 4 YES Run recorder at least four times to allow YES the paper to realign Js resistance approx 10 ohms no Replace the motor assembly 7 6 YT 1 YT 1S Chart Recorder Maintenance Motor advances but there is no print Is the paper installed correctly Y YES Check voltages
6. Cross index Mfr Code Number to Manufacturer Mfr Code Manufacturer Address City State Zip Code 54318 ASTRO MED INC 600 EAST GREENWICH AVE WEST WARWICK RI 02983 5446 80009 TEKTRONIX 14150 SC KARL BRAUN DR BEAVERTON OR 97007 0001 Replaceable Electrical Assemblies Fig Tektronix Serial No Name amp Description Mfg Mfr Part No PartNo Effective Dscont Code No 1 118 7614 02 CIRCUIT BD ASSY CONTROLLER W HARNESS 54318 32001 001 A2 118 7616 01 PRINTHEAD ASSY THERMAL 54318 30995 014 YT 1 YT 1S Chart Recorder 8 3 Replaceable Parts Replaceable Mechanical Assemblies Fig No 1 2 8 4 Tektronix Part No 118 7613 01 118 8357 00 118 7617 00 118 7623 00 118 7622 03 118 7633 00 118 7620 00 118 7621 01 200 3498 00 118 7628 00 118 7624 02 174 3241 00 118 7619 00 118 7631 00 214 4728 00 Serial Effective Dscont Name amp Description MOTOR CHART DRIVE ASSY MANDREL PAPER W HARDWARE KNOB PAPER RETAINING PANEL REAR W PINS FRAME CASE 3 SPACER NYLON BD ASSY SEE 1 REPL WIRING HARNESS PUSHBUTTON RECORD PANEL FRONT W LATCH YT 1 ONLY DOOR ASSY YT 1S ONLY LATCH DOOR YT 1 YT 18 GASKET YT 1 YT 1S THERMAL PRINTHEAD ASSY SEE A2 REPL CABLE ASSY CHART RECORDER PRINT SPRING COMPRESSION BLOCK SPRING SUPPORT BELT TIMING 1 8 INCH WIDE Mfg Code 54318 54318 54318 54318 54318 54318 54318 54318 54318 54318 54318 54318 54318 54318 54318 Mfr Part No 31
7. 1S Chart Recorder 2 1 General Information and Specifications Printing Specifications Characteristic Writing method Chart paper End of roll warn ing Performance Required Supplemental Infor Roll type 50 mm Outside Example See Tektronix dia 50 mm max Accept part number in Accessories 15 mm spindle Thermal section coating facing inside roll Will allow recorder to meet print density spec Shall be marked by a red line beginning 5 ft from the end of the roll Print color Print density Background den sity Black Solid black print pattern Pattern created by printing shall measure at 1 1D on 40 element blocks three Kodak Gray Scale times each until a 360 bit wide by at least 200 bit long 45 mm by 25 mm min image is formed Density measurement made with an appropriate Densitometer Patten print at 25 C 5 C Less than 0 2 D when stored at 70 C for 24 hours Print drop outs No more than 1 of the elements to be printed shall fail to print Adjacent fail ures shall number three or less Print element 0 12 5mm width Addressable print 384 48 8 bit bytes elements Print field width 48 mm Alignment of print field Entire print field must lie on paper YT 1 YT 1S Chart Recorder General Information and Specifications Printing Specifications Cont Characteristic Performance Required Supplemental Infor Orthogonality of A line printe
8. PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES SSS FEE Table of Contents General Safety Summary Operator Safety Summary vii Service Safety Summary vii Installation and Repacking Unpacking and Initial Inspection ix Power Source and Power Requirements ix Repacking for 8 ix Operating Instructions Instructions for Use 1 1 Paper 1 1 General Information and Specifications Product Description 2 1 Standards Documents and References Used 2 1 Characteristics and Specifications 2 1 Operator Performance Checks Head Alignment Chart Diagnostic and Chart Quality 3 1 Accessories and Options Standard and Optional Accessories 4 1 Options rer eet A a ei ae abe er 4 1 Theory of Operations IntrOdUCtlOD co o m
9. for pin designations see Interface Pin Structure A0 INPUT Address lines from the host for the read and write operations to the recorder all lines active high DO D7 INPUT Bidirectional data lines for the read and write operations to the recorder all lines active high INPUT Recorder select line from the host active low INPUT Data read line from the host active low INPUT Data write line from the host active low OUTPUT Interrupt request line from the recorder active low Interface Pin Structure The interface pin structure table along with the associated waveforms are in the Maintenance section of this manual A 25 pin male D shell connector is used on the recorder Information about the operation of these pins is available under Option Port Interface in the Circuit Description section of the 1502B and 1503B Service manuals 5 6 YT 1 YT 1S Chart Recorder Theory of Operations Interface Characteristics Characteristic Performance Required Supplemental Info Connector 25 pin male D shell Holm berg HYM25A28AP or equiv Protocol As defined under heading Protocol Logic Interface 74HC CMAS or equiv Print Initiation Ground Closure on IR IR Pin 7 Command Execution Times Print 2 5 ms typical Measure Command from time command sent to time BUSY flag clears Advance 4 ms typical Load Data Byte lt 5 us typical Latch Printhead Data lt 5 us typical
10. inches of narrow spaced lines on the chart YT 1 YT 1S Chart Recorder 6 3 Calibration There must be between 5 43 to 6 38 inches of wide spaced lines on the chart Fold the paper in half at the last narrow line The two halves of the chart should be equal in length The entire diagnostic should be printed within the boundaries of the paper All vertical lines should be perpendicular relative to the top and bottom of the chart within 1 degree The three solid vertical lines on the chart must be complete with no missing dots All lines on the chart must be legible with no fading smearing or irregularities in print blackness SOLID LINES v v v Equally Spaced Narrow Lines Equally Spaced Wide Lines 6 Inches 6 Inches 12 INCHES y YT 1 YT 1S Chart Recorder EE AA Maintenance AAA BEI Maintenance A This section contains information of preventive and corrective maintenance troubleshooting and shipping instructions CAUTION We recommend that service be performed at an authorized Tektronix Service Center or by a technician skilled in digital sampling techniques The circuit board has SMT devices that require special equipment to replace If found defective we recommend that the ECB be replaced as an entire unit We have included a major parts connectors locator as an aid to assist in troubleshooting Required Tools This is a list of common tools n
11. total chart from first printed line to last printed line must measure between 10 87 to 12 76 inches YT 1 YT IS Chart Recorder 3 1 Operator Performance Checks b There must be between 5 43 to 6 38 inches of narrow spaced lines on the chart c There must be between 5 43 to 6 38 inches of wide spaced lines on the chart d Fold the paper in half at the last narrow line The two halves of the chart should be equal in length e The entire diagnostic should be printed within the boundaries of the paper f All vertical lines should be perpendicular relative to the top and bottom of the chart within 1 g The three solid vertical lines on the chart must be complete with no missing dots h All lines on the chart must be legible with no fading smearing or irregularities in print blackness If your test chart does not meet the above criteria send your chart recorder and include the test chart 3 2 YT 1 YT 1S Chart Recorder AAA Accessories and Options EXA A Accessories and Options Standard Accessories Accessory Tektronix Part Number Chart paper single roll 006 7647 00 Optional Accessories Accessory Tektronix Part Number Chart paper 25 roll quantity 006 7677 00 Chart paper 100 roll quantity 006 7681 00 Options There are no options for the YT 1 YT 1S Chart Recorder YT 1 YT 1S Chart Recorder 4 1 Accessories and Options 4 2 YT 1 YT 1S Chart Recorder Theory of Operations SS ed T
12. tracking 4 Paper Skews Upward a Move the top of the paper guide slightly closer from the printhead side of the instrument b Tighten the two paper guide screws and replace the paper retaining mandrel and the paper Run a minimum of two Print Head Alignment chart diagnostics and check for proper paper tracking If necessary repeat the above procedure to fine tune the skew Electrical ECB Inputs and Outputs Accessing Connectors To access J2 and J3 remove the ECB from the recorder Disassemble the chart recorder Reconnect all wiring Attach the Option Port extension cable to the parent instrument s Option Port Connect one end of the cable to J2010 on the parent instrument Main Board and the other end to J1 on the YT 1 YT 1S ECB YT 1 YT 1S Chart Recorder 7 9 Maintenance Motor Printhead E Switch Chart Recorder CCA The illustration above shows the connector locations in the YT 1 YT 1S Each connector and the signals that should be found on them are described in the following paragraphs and tables J1 on ECB Data and Voltage Input The Option Port Diagnostic creates a repeating pattern of signals at the option port connector to allow service technicians to verify that all signals are present and working correctly This test does not generate any output to the LCD display There are two ways to terminate this diagnostic hold down the MENU but
13. when the recorder is ready to advance i e the Advance Ready status line D4 1 Sending this command while the status line is disabled will disrupt the recorder s stepper motor and cause erratic motor action to result Print Line and Advance Paper One Line This write command operation combines the print and advance commands previously discussed Upon receiving this command the recorder will print the current line of print data and advance the paper to the next line This command should only be used when the recorder is not printing or advancing the paper i e both Print Ready and Advance Ready status lines are high D6 1 D4 1 Sending this command before the recorder is ready could cause printing errors or erratic motor action Reset Recorder to Quiescent State This write command resets the recorder to a quiescent state waiting for the host to send a command After reset the host should still check the status lines before sending a command to insure the recorder is ready YT 1 YT 1S Chart Recorder Theory of Operations Individual Read Command Operation Read Recorder Identify Code This read command operation allows the host to identify the recorder and insure that it is properly inserted into the host unit The recorder has an identify code of 01H Read Recorder Status Codes This read command operation allows the host to insure that the recorder is ready to accept the desired command The host must always
14. 310 000 22976 010 12676 001 22354 002 31268 20X 10831 000 12629 000 22764 000 31927 000 22766 000 22769 000 22745 952 10475 001 12541 001 22110 048 YT 1 YT 1S Chart Recorder Replaceable Parts 8 5 YT 1 YT 1S Chart Recorder Replaceable Parts 8 6 YT 1 YT 1S Chart Recorder
15. Bs Gasket material 3 Inspect gasket material and replace if necessary use Dow Corning 3140 or equivalent to coat mating surface of gasket Paper Retaining Mandrel 4 Remove the two mounting screws on the right side panel that attach the paper retaining mandrel assembly YT 1 YT 1S Chart Recorder 7 3 Maintenance 5 Remove the mandrel from the recorder 4 Manarel Chart Drive Motor Assembly 6 Remove the two compression springs between the forward support strut and motor drive assembly Compression Springs ET 4 Drive Motor 7 Remove the two mounting screws that hold the motor drive assembly to the right side panel They are located near the middle of the right side panel YT 1 YT 1S Chart Recorder Maintenance 8 With a long nosed plier or screwdriver remove the wire harness connector from the ECB socket Avoid scratching the printhead 9 Remove the motor assembly through the top of the case Thermal Printhead 10 Remove the four mounting screws that attach the thermal printhead to the left side panel d ga 5 Printhead d 11 Carefully disconnect the thermal printhead from the ECB Use an IC puller or a long nosed plier Controller Board 12 Remove three ECB mounting screws washers and standoffs ECB Case Nut Case
16. Instruction Manual Tektronix YT 1 YT 1S Chart Recorder 070 9947 00 ST905 AD MMC 010 0910 LP 024 4850 NOTE This manual is intended for YT 1 YT 1S Chart Recorders serial numbers 030500 and higher or units that have been upgraded to that level to identify upgrade see page 8 5 and note frame cutout next to print head For instruments with serial numbers 030499 and lower that not been upgraded please contact your local Tektronix Customer Service Representative for information regarding module exchange service First Printing Oct 1998 Copyright Tektronix Inc 1998 All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc Box 1000 Wilsonville OR 97070 1000 TEKTRONIX and 1 YT 1S are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warrant
17. RRUPT REQUEST active low 5 Input RS RECORDER SELECT active low 4 Input RD DATA READ active low 3 Input WR DATA WRITE active low 2 In Out DO Data Line 0 active high 1 In Out D1 Data Line 1 active high YT 1 YT 1S Chart Recorder 7 11 Maintenance J2 on ECB Thermal Printhead Output J2 Pin No 1 Data Present 5 VDC 0 5 V 16 VDC 1 5 V 16 VDC 1 5 V 5 VDC 0 5 V Ground Ground 5 V 500Hz Square Wave co co oa BY col 5 V 500Hz Square Wave 5 V Data Stream 5 V Data Stream 5 V Data Stream No connection 5 VDC 0 5 V 5 VDC 0 5 V J3 on ECB Motor Drive Connector J3 Pin No Data Present 1 16 V Data Stream 2 16 V Data Stream 3 16 V Data Stream 4 16 V Data Stream 7 12 YT 1 YT 1S Chart Recorder Maintenance Shipping Instructions If possible reuse the original packaging materials If this is not possible use a carton with inside dimensions of no less than six inches for cushioning materials or obtain a shipping carton from an authorized Tektronix Service Center Shipping Carton Test Strength Gross Weight Ib Carton Test Strength Ib 0 10 200 10 30 275 30 120 375 120 140 500 140 160 600 1 Surround the instrument with polyethylene sheeting to protect the finish of the instrument 2 Cushion the instrument on all sides by tightly packing dunnage or urethane foam between carto
18. You may ship the defective module to Tektronix for repair We will repair and return the same module to you New Modules New modules can be purchased like other replacement parts Using the Replaceable Parts List The tabular information in the parts list is arranged for easy use The parts list is indented to indicate item relationships The following is an example of the indentation system used in the Name and Description column Assembly and or component Detail part of assembly or component Parts of detail part Abbreviations conform to American Nation Standards Institute ANSD standard Tektronix Part Number Use the part number when ordering a replacement part from Tektronix Serial Model No These columns show the serial numbers of the first and last instruments in which a part was used No entry in these columns indicates that the part is used in all instruments Name and Description In the parts list an item name is separated from its description by a color Because of space limitations an item name by be 8 2 YT 1 YT 1S Chart Recorder Replaceable Parts incomplete For more name identification refer to the U S Federal Cataloging Handbook H6 1 Mfr Code and Mfg Part Number These columns list the code number of the manufacturer of the part and the manufacturer s part number for the part Refer to the Cross Index Mfg Code Number to Manufacturer for names and addresses of manufacturers
19. and waveforms on J2 on the ECB Are they correct Install the paper correctly Replace the ECB assembly The paper will not advance Y Measure resistance between P3 1 amp P3 2 and between P3 3 amp P3 4 s the resistance approx 10 ohms y NO Replace the motor assembly YT 1 YT 1S Chart Recorder Replace the ECB assembly 7 7 Maintenance Data garbled on the paper Y Check voltages and waveforms on J2 on the ECB NO Are they correct Replace the ECB assembly YES Replace the printhead assembly Mechanical Paper Skew Adjustments 1 To adjust the paper guide first remove the back panel then the paper and the paper retaining mandrel see Part Removal Re placement in this section Skew Adjustment 2 The two screws holding the paper guide onto the motor assembly must be loosened slightly not too much Position the paper guide as follows 7 8 YT 1 YT 1S Chart Recorder Maintenance 3 Paper Skews Downward a Move the top of the paper guide slightly away from the printhead side of the instrument b Tighten the two paper guide screws and replace the paper retaining mandrel and the paper Run a minimum of two Print Head Alignment chart diagnostics and check for proper paper
20. as completely finished loading the printhead with data this command is used to latch that data into the printhead so that it can be printed This command should only be used when the recorder is not printing or shifting data i e both Print Ready and Accept Data status lines are high D6 1 D5 1 Sending this command while either of these status line is disabled could cause faulty data to be printed out YT 1 YT 1S Chart Recorder 5 3 Theory of Operations Print a Line of Data This write operation causes the line of print data that the host has loaded and latched into the printhead to be printed This command should only be used when the recorder is ready to print i e the Print Ready status line D6 1 This host should never attempt to turn on more that 25 of the dots in the print field at one time If the host s desired pattern requires the energizing of more than 25 of the dots on a single line the solution is to divide the pattern into smaller parts These smaller parts can then be loaded and printed one ata time until the complete pattern is printed The host can then move on to the next line to print data by advancing the paper Advance Paper One Line This write command operation causes the recorder to advance the paper one line 1 8mm This command can be used after printing to move to the next print line or can be used without having printed to create a blank line or print leader This command should only be used
21. d across the print field paper shall be perpendicu lar to the edge of the paper within 1 0 degrees Paper movement 0 125 mm 0 01 mm per ADVANCE command Record length 10 87 to 12 76 inches Algo rithm dependent Print time Typical 20 seconds Algo rithm dependent Power Specifications Characteristic Performance Required Supplemental Infor 5 Volts 5 V 5 500 mW max Power is applied to recorder only while it is operating 16 Volts 16 Volts 10 Average Power 12 W max Peak current not to exceed 1 7 A Mechanical Characteristics YT 1 YT 1S plugs into the parent instrument Option Port YT 1 YT 1S Chart Recorder 2 3 General Information and Specifications Environmental Specifications Apply when chart recorder is properly installed in a 1500B C series TDR Option Port Characteristic Performance Required Supplemental Infor Temperature Prolonged exposure to Operating 10 C to 55 C temperatures above 70 C Non operating 62 C to 85 C might cause thermal paper to darken Humidity Operating 0 to 100 RH excluding condensing Non operating 0 to 100 RH including condensation Altitude Operating To 15 000 ft above sea level Non operating To 40 000 ft above sea level Vibration 5 to 15 Hz 0 7 g Shock or vibration greater MIL T 28800C thanig may cause tempo 15 to 25 Hz 1 39 rary trace discontinuity 25 to 55 Hz 3 0 g Shock 30 g 11 ms 1 2 sine wave form three shoc
22. e paper exit slot of the recorder the paper skew may need adjustment Symptoms include information printed off the top or bottom of the page and paper jamming Occasionally the paper may skew after the paper has been replaced This is due to improper setting of the paper in the feed path This will usually clear itself after a couple of charts If it does not the paper still skews after a minimum of two charts the paper guide would be adjusted If the YT 1 YT 1S did not pass the Head Alignment Chart diagnostic refer to the Maintenance section of this manual Performance Check The following checks will confirm if the YT 1 YT 1S is operating according to specification They are found under Chart Diagnostics Menu in the Diagnostics Menu Head Alignment Chart Diagnostic This test gives the chart recorder a rapid feed test as well as a test for print dropouts feed spacing and alignment of the head If the YT 1 YT 1S is not operating properly symptoms may include pixel drop out washed out print tilted chart chart off the page or improper or erratic speed Chart Quality 1 Access Head Alignment chart in the Chart Diagnostics menu located under Diagnostics Menu of the parent instrument 2 Press MENU The diagnostic chart that is printed must meet these criteria a The total chart from first printed line to last printed line must measure between 10 87 to 12 76 inches b There must be between 5 43 to 6 38
23. e Operator Safety Summary and in the Operator section Repacking for Shipment If the YT 1 YT 1S is to be shipped to a Tektronix Service Center for service or repair attach a tag showing the name and address of the owner name of the individual at your firm that can be contacted complete serial number and a description of the service required If YT 1 YT 1S Chart Recorder ix Installation and Repacking the original packaging is unfit for use or is not available repackage the instrument per the instructions near the end of the Maintenance section in this manual x YT 1 YT 1S Chart Recorder EA AAA Operating Instructions EX intan I Operating Instructions Instructions for Use Making permanent records with the 1500 series is easy with the Tektronix YT 1 YT 1S Digital Chart Recorder CAUTION Do not operate this product without paper installed or if operating when the paper runs out shut the power off immediately Printing without paper might burn out the printhead 1 Make sure the desired waveform or waveforms is displayed on the LCD 2 Slide back the protective cover on the recorder Push PRINT on the front panel of the chart recorder 3 When the chart recorder has finished tear off the paper recording pulling the paper to the left You may prefer to close the door prior to tearing off the chart to facilitate a cleaner tear Making chart recordings with the YT 1 YT 1S will reduce the charge of t
24. ee on satt t ut a 5 1 Circuit Description 5 2 Individual Write Command Operation 5 3 Individual Read Command Operation 5 5 Protocol u Sates o BAG Ra sacle Awe e C ROS d 5 5 Interface Information 5 6 Calibration LCD Chart Diagnostic 6 1 Performance Check 6 3 YT 1 YT 1S Chart Recorder Table of Contents Maintenance Required Tools imc TRE ee ehr 7 1 Preventive Maintenance 7 1 Part Removal Replacement 7 3 Troubleshooting merac sri reve ee een 7 5 Mech nieal een Daran 7 8 Bleetrical an URP ice 7 9 Shipping Instructions 7 13 Replaceable Parts vi Parts Ordering Information 8 1 Electrical Replaceable Parts 8 3 Mechanical Replaceable Parts 8 4 Exploded View Diagram 8 5 YT 1 YT 1S Chart Recorder AA III General Safety Summary CAUTION Do not operate this product without paper installed or if operating when the paper runs out shut the power off immediately Printing without paper might burn out the printhead Operator Safety Summary Power Sources This product is intended to operate from a p
25. eeded to accomplish the maintenance procedures that follow Oscilloscope Tektronix 5440 or equivalent Option Port extension cable 174 0950 00 3 8 inch hex nutdriver 1 2 inch hex nutdriver 0 050 hex wrench Phillips head screwdriver Straight blade screwdriver Long nosed pliers Cotton swabs Preventive Maintenance Preventive maintenance includes cleaning and visual inspection A convenient time to perform preventive maintenance is during the periodic performance check calibration procedure If the instrument has been subjected to extreme environments or harsh handling more frequent preventive maintenance may be necessary YT 1 YT 1S Chart Recorder 7 1 Maintenance A Cleaning CAUTION Do not use chemical cleaning agents that contain benzene toluene xylene acetone etc because of possible damage to plastics in the instrument The outside chassis and front panel should be cleaned gently with a damp cloth The interior of the YT 1 YT 1S is protected from dirt and dust as long as it is installed in the option port and the print door is closed However if interior cleaning is necessary blow off accumulated dust with low pressure air and remove remaining dirt with a soft brush cotton swab or pipe cleaner moistened with isopropyl alcohol The paper must be removed before cleaning with alcohol The thermal printhead can be cleaned with a soft cotton swab dipped in a little alcohol Latch the motor assembl
26. he battery pack if so equipped in the parent instrument Read the appropriate battery information in the parent instrument Operator section Paper Replacement 1 Turn the knurled knob on the front panel of the chart recorder counter clockwise until it loosens Pull the unit from the parent instrument Set the YT 1 YT 1S with the front panel to the right 2 With your thumbs push the frame surrounding the motor pulley Push until the motor assembly latch locks the motor assembly to the side frame This loosens the tension in the paper path allowing any remaining paper to be removed 3 Remove the paper retaining knob Remove any paper and the empty paper core YT 1 YT 1S Chart Recorder 1 1 Operating Instructions 4 Following the diagram on the top of the recorder place a fresh roll of paper in the recorder so the paper unwinds off the right side of the roll into the paper path looking down on the recorder the paper unrolls clockwise Tearing the end of the paper roll on a slant will facilitate placing the paper in the slot 5 Assure that the paper drops down into the paper path without binding and the paper protrudes through the slot in the front of the instrument Release the keeper from the frame and the paper drive mechanism will return to the operating position 1 2 YT 1 YT 1S Chart Recorder EY QE General Information and Specifications a II III General Information and Specifications Product De
27. heory of Operations Introduction The YT 1 YT 1S Chart Recorder is to be used with a parent instrument such as the 1502B C or 1503B C Time Domain Reflectometer This manual contains information on the YT 1 YT 1S only For related information on the parent instrument see Option Port Interface in the Circuit Description section of respective service manual The YT 1 YT 1S consists of a drive motor assembly a thermal printhead and an electronic circuit board More information can be found in the Specification section of this manual A block diagram of the Option Port can be found in the parent manual in the Circuit Description section See the following figure for the block diagram of the YT 1 YT 1S Chart Recorder ee SS ne nee Controller Board Motor Assembly i Control Acus y DriveMotor amp i 1 r Seemann a Address 313 and Decode I i 6 Control and 2 To Control 4 el Option 1 95 es Port g Data 1 1 s st J1 Data Serial Word 2 M amp Zur 6 1 Latch Load i 4 1 i lt i Power o Interrupt Status i and 9 Switch Ground gt Powerand 7 J2 a i Ground T Thermal Print Assembly daa
28. ks in each direction on each axis Salt atmosphere 48 hours 20 solution Per MIL T 28800C Electromagnetic When operated in host compatibility instrument unit meets the following requirements of MIL STD 461A CE02 CE04 CS02 CS06 REO2 RE02 1 503 RS03 1 Electrostatic dis 3 kV to 20 kV Tekronix charge standard 062 2862 Water resistance Splash proof and drip proof 2 4 YT 1 YT 1S Chart Recorder Ey Operator Performance Checks SS Operator Performance Checks The following checks will confirm if the YT 1 YT 1S is operating according to specification They are found in the Chart Diagnostics Menu in the Diagnostics Menu of the parent instrument Head Alignment Chart Diagnostic This test gives the chart recorder a rapid feed test as well as a test for print dropouts feed spacing and alignment of the head If the 1 15 is not operating properly symptoms may include pixel drop out washed out print titled chart chart off the page or improper or erratic speed Chart Quality 1 Access the Head Alignment chart in the Chart Diagnostics menu located under the Diagnostics Menu of the parent instrument 2 Press MENU The diagnostic chart that is printed should look like the figure below and must meet the following criteria SOLID LINES v v v Equally Spaced Narrow Lines Equally Spaced Wide Lines y 6 Inches 6 Inches 4 12 INCHES y a The
29. n and instrument allowing three inches on all sides 3 Seal carton with shipping tape or industrial stapler YT 1 YT 1S Chart Recorder 7 13 Maintenance 7 14 YT 1 YT 1S Chart Recorder Replaceable Parts AAA gt gt gt Replaceable Parts List This section contains a list or replaceable modules in the YT 1 YT 15 Use this list to identify and order replacement parts Parts Ordering Information Replacement parts information is available from your Tektronix Service Center or representative Parts can be ordered through your local Tektronix field office Changes to Tektronix instruments are sometimes made to accommo date improved components as they become available and to provide benefit of the latest circuit improvements developed by our engineers When ordering parts include the following information Part number m Instrument type or model number Instrument serial number m Instrument modification number if applicable Module Replacement The YT 1 YT 1S is serviced by replacing defective modules There are three options you should consider Module Exchange In some cases you may exchange the defective module for a re manufactured module Re manufactured modules cost significant ly less than new modules and meet the same factory specifications For more information about the module exchange program call 1 800 832 3814 YT 1 YT 1S Chart Recorder 8 1 Replaceable Parts Module Repair
30. ower source supplied by the parent instrument Do not attempt to power this module by any other means Grounding the Instrument This product is grounded through the parent instrument A protective ground connection is essential for safe operation Danger Arising From Loss of Ground Upon loss of the protective ground connection all accessible conductive parts including knobs and controls that appear to be insulating can render an electric shock Refer to connector changes to qualified service personnel Do Not Operate in Explosive Atmospheres To avoid explosion do not operate this product in an explosive atmosphere unless it has been specifically certified for such operation YT 1 YT 1S Chart Recorder vii General Safety Summary Do Not Remove Covers or Panels To avoid personal injury do not remove the product covers or panels Do not operate the product without the covers and panels properly installed Service Safety Summary A viii CAUTION For qualified service personnel only Refer also to the preceding Operator Safety Summary Do Not Service Alone Do not perform internal service adjustment of this product unless another person capable of rendering first aid and resuscitation is present Use Care When Servicing With Power On Dangerous voltages exist at several points in this product To avoid personal injury do not touch exposed connections and components while power is on Disconnect
31. power before removing protective panels soldering or replacing components YT 1 YT 1S Chart Recorder EA Installation and Repacking Unpacking and Initial Inspection Before unpacking the YT 1 YT 1S from its shipping container or carton inspect for signs of external damage If the carton is damaged notify the carrier The shipping carton contains the basic instrument and its standard accessories Refer to the replaceable parts list for a complete listing If the contents of the shipping container are incomplete if there is mechanical damage or defect or if the instrument does not meet operational check requirements contact your local Tektronix Field Office or representative If the shipping container is damaged notify the carrier as well as Tektronix The instrument was inspected both mechanically and electrically before shipment It should be free of mechanical damage and meet or exceed all electrical specifications Procedures to check operational performance are in the parent instruction service manual Procedures to check electrical and mechanical specifications are in the Calibration section of this manual Power Source and Power Requirements The YT 1 YT 1S is intended to be operated from the parent instrument s power supply A protective ground connection by way of proper installation in the parent instrument is essential for safe operation Further information on the YT 1 YT 1S power requirements can be found in th
32. scription The Tektronix YT 1 YT 1S Chart Recorder is an optional accessory for a parent instrument e g the 1500B C series Metallic Time Domain Reflectometers It is designed to plug into the instrument in the option port The YT 1 YT 1S has a water resistant door that covers the record paper slot A chart recording is a permanent record It can be of great service in fault interpretation e g a chart recording of a fault can be compared to that of an acceptable test Standards Documents and References Used Terminology used in this manual is in accordance with industry practice Abbreviations are in accordance with ANSI Y1 1 1972 with exceptions and additions explained in parentheses in the test Graphic symbology is based on ANSI Y32 2 1975 Logic symbology is based on ANSI Y32 14 1973 and manufacturer s data books or sheets A copy of ANSI standards may be obtained from the Institute of Electrical and Electronic Engineers 345 47th Street New York NY 10017 Characteristics and Specifications The tables on the following pages list the electrical characteristics and features that apply to the Tektronix YT 1 YT 1S Chart Recorder when it is installed in a Tektronix 1500B C series TDR instrument and after a 20 minute warm up The Performance Requirement column describes the limits of the characteristic and Supplemental Information column describes features and typical values or information that might be helpful YT 1 YT
33. te Address 1H Advance paper one line with no printing Address 2H Load a byte of print data 8 bits Address 3H Latch a line of print data Address 4H Print a line and advance the paper one line Address 5H Print a line with no advance of paper Address 6H FH Not used by recorder 5 8 YT 1 YT 1S Chart Recorder SAA AA Calibration IE LEE Calibration The YT 1 YT 1S Chart Recorder has no electrical adjustments and few mechanical adjustments Since the mechanical adjustments are done at the factory they are not included in the Calibration section The mechanical adjustments can be found in the Maintenance section The Performance Check will determine whether or not the instrument is operating according to published specifications The YT 1 YT 1S Chart Recorder Performance Check is accom plished via a diagnostic test on the parent instrument 1500B C se ries LCD Chart Diagnostic Technically this is not a diagnostic but for assistance in trouble shooting temporary adjust of the printing characteristics and a back up for the PRINT push button For information on the troubleshooting aspects of LCD Chart see the Maintenance section of this manual The printing characteristics of the YT 1 YT 1S are designed to provide chart recordings in environmental extremes under varying conditions If it does become necessary to change the chart characteristics it is possible from the front panel of the 1500B C se ries instrument
34. ton until the Option Port menu reappears or momentarily pull the line low The purpose of the diagnostic is to exercise the data and control lines at the option port by creating a repeating pattern of signals that can be easily observed with an oscilloscope The pattern on all data lines 1s the same and the pattern on the four address lines is also the same Although the exact patterns on the read write and enable lines vary the repetition interval is the same for all patterns about 15 microseconds The active low trigger line pin14 on the 25 pin connector is unused in the diagnostic The function of the line can be tested by momentarily grounding it to exit the diagnostic and return to the Option Port menu Pin In Out Function Status 25 In Out Data Line 2 active high 24 In Out Data Line 3 active high 7 10 YT 1 YT 1S Chart Recorder Maintenance Pin In Out Designation Function Status 23 Data Line 4 active high 22 Data Line 5 active high 21 Data Line 6 active high 20 Data Line 7 active high 19 Input 0 Address Line 0 active high 18 Input Al Address Line 1 active high 17 Address Line 2 active high 16 Address Line 3 active high 15 Reserved for host 14 Reserved for host 13 16 VDC Power motor print 12 16 VDC Power motor print 11 16 VDC Return Power GND 10 16 VDC Return Power GND 9 5 VDC Power Logic 8 5 VDC Return logic GND 7 INTE
35. wait until the recorder is ready before sending a command By checking the corresponding status line or lines the host can determine recorder readiness There are status lines for Ready to Print D6 Ready to Advance D4 Ready to Accept Data D5 and Recorder Fault D7 Only send commands when the recorder is ready Protocol Introduction This protocol is designed for the Tektronix YT 1 YT 1S bit map only thermal dot matrix recorder The Tektronix YT 1 YT 1S chart recorder produces a hard copy record on thermally activated paper of data provided through a parallel digital interface The bit map dot matrix data is provided one byte at a time 1 byte 8 bits line by line 1 print line 48 bits This allows any combination of dots to be printed including alpha numeric characters and graphics Each dot corresponds to one element of a thermal printhead with a resolution of 200 dots per inch 8 dots per mm Printing is achieved by energizing the individual elements of the printhead YT 1 YT 1S Chart Recorder 5 5 Theory of Operations Interface Information The YT 1 YT 1S chart recorder communicates to the host system via the host s address and data bus The interface includes four address lines eight data lines one interrupt line and three control lines All interface lines are 74HC compatible Inputs and Outputs The following signal descriptions apply to the host to recorder interface Refer to the following table
36. y Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a torepair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
37. y out of the way remove the paper and carefully clean the printhead by swabbing the surface Any of the surfaces that are in the paper path should also be cleaned Lubrication No lubrication is necessary It is recommended however that the YT 1 YT 1S be cleaned on a regular basis Visual Inspection Obvious defects such as broken connectors damaged board frayed cables improperly seated components and heat damaged compo nents should be corrected first before attempting further trouble shooting Heat damage usually indicates a deeper problem somewhere in the circuitry and should be traced and corrected immediately We do not recommend electrical checks of individual components because defective components will become evident during instrument operation YT 1 YT 1S Chart Recorder Maintenance Re calibration After maintenance has been performed the instrument should be checked per procedures explained in the Calibration section of this manual Parts Removal Replacement The YT 1 YT 1S can be disassembled by following these directions in order It can be assembled by reversing the order Front Panel Plate 1 Remove the three mounting screws one on the right side of the panel and two on the left which secure the front panel to the frame 2 Remove the Print switch from the upper right corner of the front panel use care to not pull the wires loose from this switch tan lt S La Print switch
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