Sanyo 14`` Color TV Monitor
Contents
1. 14 Sanyo Color Monitor NOTE If reading through this manual does not lead to solving a certain maintenance problem call Tele Help at the Atari Customer Service office in your geographical area as shown in one of the two maps below Order all parts from the California office WEST and CENTRAL U S A Parts for all Atari Customers Sales and Service Atari Coin Op Customer Service 1344 Bordeaux Drive Sunnyvale CA 94086 Telex 17 1103 Monday Friday 7 30 4 00 pm Pacific Time sz MOM California Alaska or Hawaii 408 745 2900 a From anywhere else in this area toll free 800 538 161 1 EAST U S A Sales and Service Only Atari Inc New Jersey Customer Service Office Cottontail Lane Somerset NJ 08873 Telex 37 9347 Monday Friday 7 30 4 00 pm Eastern time From New Jersey 201 469 5993 From anywhere else in this area toll free 800 526 3849 Sanyo Color Monitor 1 Warnings and Cautions A Before You Start You should never attempt to work on an exposed monitor chassis if you are not familiar with servicing procedures and precautions necessary for high voltage equipment Any TV monitor has three sources of possible danger strong electric shock due to high voltages or unisolated AC line voltages X ray radiation and implosion Therefore please read this chapter carefully B Safety Measures Develop good safety habits so when you2. UOurmenisand Voltages s ik HL GORT GONDOS RED 1 1111 dida etin Adjustable Controls BIRN 18998 MOKOM 4 ececnscees wees eer ess mds 87 0801 119 HIDE IS 4 Supply Voltages and Test Points Pay eee 5 Signal Test Points A Red Green Horizontal and Vertical SVNG cuss w es 6 Troubleshooting For block diagram of Sanyo monitor see 7 Repair A Picture Tube Replacement 08 9000 ES C Flyback Transformer Sanyo Color
3. 157 1st printing and Service Manual Complete with Illustrated Parts List sanyo 14 Color TV Monitor Operation Maintenance and Service Manual Complete with Parts Lists Monitor manufactured by Sanyo Electric Co Ltd Color TV Receiver Manufacturing Division Gifu Japan Published by ATARI INC 1265 Borregas Avenue P Box 427 Sunnyvale California 94086 Copyright 1980 by Atari Inc All rights reserved No part of this publication may be reproduced by any mechanical photo graphic or electronic process or in the form of a phonographic recording nor may it be stored in a retrieval system transmitted or otherwise copied for public or private use without permission from the publisher Lithographed in the U S A 7J A Warner Communications Company 0 Sanyo Color Monitor Table of Contents 1 Warnings and Cautions A BOOB TORO B ONIS 97 6 90001111 es dae eNO Re ee eee ease D Replacing with Proper E Final Testing Before Reinstalling Monitor 2 Specifications A Power 012010 005011019 50 01069110165 afd HUmidilV
4. This synchronization signal can be tested at pin 5 of the 6 pin video signal connector When using a test prod do not jam it into the connector pin Other wise you will stretch the pin and it could later fall out of the connector housing Sanyo Color Monitor 6 Troubleshooting 1904 NOIHSNONId M HIGIM 390A NOIL23133Q 92 1 1 2 TVINOZIHOH gt GLI 330A 10313 140 ASO 0 0 AY 72 1904 113110 sou 29 ASOL TWLNOZIHOH 39V110AU3AO 06 160 32 211 8 5 u HO1vi1n93uH 9315411939 1012306 1 111250 93V TIWLNOZIHOH TVINOZIHOH uO1VTIIoSO TWOILYSA INAS 99 HOlVHVd3S 5 2 01 001 Figure 4 Block Diagram of Sanyo Monitor Sanyo Color Monitor 7 Repair A Picture Tube Replacement Be sure to first unplug the power and video signal connectors Remove monitor assembly from game 1 Discharge the high voltage from the tube the large high voltage anode connector near the top of the picture tube Unplug the neck board at rear of picture tube Unplug the degaussing coil 2 pin connector Unplug the 4 wire connector on Main PCB Unhook the spring that holds the braided ground wire near the bottom corner of picture tube Usin
5. Seo OS a 4 111 ITI C402 o e S 11 x IR S 5 Ba A 12 Figure 6 Main PCB Assembly Sanyo Color Monitor IRZ7ON R277 VR256 R278 E R256 R258 R279 lt A N d N N LZ53 R259 R262 CI 4 Figure 7 Neck Assembly 13 Sanyo Color Monitor Atari Part No Figure 8 Parts List of Sanyo Monitor Description Reference Designations in Bold Note All diode reference designations Dxxx have been changed to CRxxx the standard American nomenclature 99 160001 99 160002 99 160003 99 160004 99 160005 99 160006 99 160007 99 160008 99 160009 99 160010 99 16001 1 99 160012 99 160013 99 160014 99 160015 99 160016 99 160017 99 160018 99 160100 99 160101 99 160102 99 160103 99 160104 99 160105 99 160106 99 160107 99 160200 99 160201 99 160202 99 160203 99 160204 99 160205 99 160206 99 160207 99 160208 99 160209 99 160210 99 160211 99 160212 99 160213 99 160214 99 160215 99 160216 99 160300 99 160301 14 Control PCB Assembly Main PCB Assembly Neck PCB Assembly Convergence and Purity Magnets Picture Tube Socket 14 Picture Tube Type 370ECB22 Type LA1464 Integrated Circuit 401 LA5110 Integrated Circuit 601 Pincushion Corr
6. i Y NOTICE ALL PERSONS RECEIVING THIS DRAWING 3300 3300 A vihan 466 4 specific written permission ari Inc Sunnyvale RAGS R486 L7I33B we 45 467 449 C482 5 9 E a This drawing is only conditionally issued and neither 4 R469 IOK 4700P C46 receipt nor possession thereof confers or transfers C457 150 PA e right in or license to use the subject matter of the draw 100 45 45 6 ing or any design or technical information shown thereon A 3300 P C46 TASI ok MEUS reproduce drawing Any 7 ereof Except for manufacture vendors ari Inc gt gt 470P ATOO N 2 dul 840V Hd for p pe Une the corporation s 459 1000 icense no right to reproduce this drawing is granted 8200 TRAI 1 TR 904 250870 the subject matter thereof unless by written agreement e c PPP clot pe with or written permission from the corporation Figure 5 Schematic Diagram of Sanyo Monitor If you do need to converge the outer screen areas you are done with the convergence cedure Otherwise imme
7. screen voltage control until you achieve a pleasing level of brightness Too high a brightness causes the retrace lines to show Too low a brightness causes the entire screen to become dark and obscured However if you cannot achieve the proper brightness by using this white adjustment knob then you should check the master brightness level adjustment This potentiometer is located almost dead center on the Main PCB at 201 To reset the brightness level disconnect the 6 pin video signal connector from the monitor Turn the white brightness control to maximum or fully clock wise Connect a DC voltmeter s plus lead to TP452 and its minus lead to TP451 near the center of the Main PCB Set the voltmeter to the 1 5 3 V range Now adjust the small VR201 potentiometer to 0 5 volts Recon nect the 6 pin connector on the monitor HORIZONTAL VERTICAL VERTICAL HOLD HOLD HEIGHT BRIGHTNESS CONTROL PCB B ADJUSTMENT For Technicians Only Cs MAIN PCB FRONT BRIGHTNESS LEVEL 451 452 HORIZONTAL WIDTH ADJUST MENT COIL 0 Figure 2 Adjustable Controls PCB and Control Horizontal Hold Use this adjustment if the picture drifts sideways across the screen Find the second potentiometer from the right on the Control PCB as you face the monitor s screen see Figure 2 Turn the pot until the black lines no longer slant downwards or up wards and you obtain
8. Capacitor C486 820 pf 500V Ceramic Capacitor C470 473 1000 pf 1000V Ceramic Capacitor C602 605 1500 pf 2000V Ceramic Capacitor C465 466 468 481 482 485 500 pf 2000V Ceramic Capacitor C467 0 082 mf 50V Mylar Capacitor C403 0 33 mf 50V Mylar Capacitor C407 0 056 mf 125V Mylar Capacitor C601 0 1 mf 1000V Mylar Capacitor C469 0 068 mf 50V Mylar Capacitor C401 0 47 mf 400V Polypropylene Capacitor C412 2700 pf 630 Polypropylene Capacitor C456 1000 pf 2000V Ceramic Capacitor C901 100 pf 50V Ceramic Capacitor C251 253 1000 pf 1000V Ceramic Capacitor C257 258 Type 8C1FR5B 3K Ohm Variable Resistor VR353 Type 8C1FR5B 200K Ohm Variable Resistor VR354 8C1FR5B 50K Ohm Variable Resistor VR352 355 Type 8C1FR5B 10K Ohm Variable Resistor VR251 253 Type 8C1FR5B 200 Ohm Variable Resistor 254 255 15CFR10B 1M Ohm Variable Resistor VR256 8L2FRB 5K Ohm Variable Resistor VR601 8LFRB 20K Ohm Variable Resistor 201 Type 8CFRB 500K Ohm Variable Resistor 452 15 Sanyo Color Monitor Figure 8 Parts List of Sanyo Monitor continued Atari Part No Description Reference Designations in Bold 99 160450 Deflection Yoke L902 99 160451 Filter Coil L452 99 160452 Width Coil 7454 99 160453 Width Coil 7455 99 160454 Peaking Coil L451 99 160455 Line Filter L601 99 160456 Peaking Coil L251 253 99 160457 Peaking Coil L2
9. Monitor 8 Adjustments AS PENS AD 05708 9 L E ETE 9 2 Red Purity 9 3 Green Purity Adjustment 9 4 Blue Purity Adjustment 9 B PURINE 9 B Convergence Adjustments 9 1 Static Convergence CEMEFATES 9 2 Dynamic Convergence Outer Area 11 9 Schematic and Illustrated Parts Lists For drawings see 12 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 List of Illustrations Overview of Sanyo 14 Color TV Monitor 1 Adjustable Controls on Main PCB and Control PCB 4 Adjustable Controls on Neck 5 Block Diagram of Sanyo 7 Schematic Diagram of Sanyo 10 Main PUB 591113 12 Neck PCB Assembly 13 Parts List OT Sanyo
10. transformer be sure to check the picture for sharpness If it s not sharp adjust the white focus knob on the transformer Sanyo Color Monitor 8 Adjustments A Purity Adjustments 1 Preliminary First remove the monitor from the game but leave the connectors still attached The purity and con vergence magnets can be moved without loosening the rear Phillips screw If you will also be converging the outer area of the picture see Section 2 on the next page you should loosen both the deflection yoke and magnet mounting screws at this time Turn the picture tube so it faces north or south Then degauss the picture tube with a hand held degaussing coil the magnets have been secured with a white glue you will find that its hold can be easily broken when you move the magnets 2 Red Purity Adjustment Refer to Figure 3 and turn off the green and blue guns with the G and B bias or cutoff controls lo cated on the neck board Leave the red gun on Dis play any self test pattern on the screen that shows solid white Keep this display throughout the purity adjustments Rotate and spread the tabs of the purity magnets the pair farthest towards the front until you center the screen image vertically and horizontally You should also obtain a pure red overall 3 Green Purity Adjustment Turn off the red and blue guns by using the con trols on the neck board leave the green gun on Readjust the purity magnets if n
11. 0312 99 160313 99 160314 99 160315 99 160316 99 160317 99 160318 99 160319 99 160320 99 160321 99 160322 99 160323 99 160324 99 160325 99 160326 99 160327 99 160328 99 160329 99 160330 99 160331 99 160332 99 160333 99 160334 99 160335 99 160336 99 160337 99 160400 99 160401 99 160402 99 160403 99 160404 99 160405 99 160406 99 160407 99 160408 Sanyo Color Monitor Figure 8 Parts List of Sanyo Monitor continued Description Reference Designations in Bold 100 uf 16V Electrolytic Capacitor C211 220 uf 16V Electrolytic Capacitor C161 202 47 uf 16V Electrolytic Capacitor C208 330 uf 25V Electrolytic Capacitor C484 4 7 uf 25V Electrolytic Capacitor C162 206 408 1 0 uf 50V Electrolytic Capacitor C166 207 453 455 458 100 uf 25V Electrolytic Capacitor C457 610 10 uf 160V Electrolytic Capacitor C471 100 uf 160V Electrolytic Capacitor C462 4 7 uf 160V Electrolytic Capacitor C406 47 uf 160V Electrolytic Capacitor C410 Type 160EE4719C Electrolytic Capacitor C606 0 01 uf Ceramic Capacitor C203 204 210 212 452 0 022 uf 50V Ceramic Capacitor C207 0 015 uf 50V Mylar Capacitor C402 404 413 8200 pf 50V Mylar Capacitor C451 459 2700 pf 50V Mylar Capacitor C477 0 047 mf 100V Mylar Capacitor C483 0 068 mf 50V Mylar Capacitor C405 820 pf 50V Ceramic Capacitor C463 470 pf 500V Ceramic Capacitor C461 4700 pf 500V Ceramic
12. 54 16 IMMINENTE 14 Sanyo Monitor 1st printing YOUR COMMENTS PLEASE Your comments will assist Atari in improving the usefulness of our publications They are an important part of preparing for revisions of manuals and parts catalogs No postage stamp is necessary if mailed in the U S A If you have any technical questions about certain Atari or Kee Games products are requesting additional publications we will immediately forward your note to the appropriate person Page Comments Fill in if you wish a reply Distributor Address LJ Operator ty Other First fold SSS BUSINESS REPLY MAIL FIRST CLASS PERMIT NO 1004 SUNNYVALE CA POSTAGE WILL BE PAID BY ADDRESSEE Atari Inc Attn Field Service Coin Op Division P O Box 427 Sunnyvale California 94086 Second fold 1 ede No Postage Necessary if mailed in the United States 61 Cut along this line u 0 Warner Communications Company 1265 BORREGAS AVENUE P BOX 427 SUNNYVALE CALIF 94086 408 745 2000 LY
13. CTOR R223 R285 5 MN 8 id 00 330 53 C253 BE 5 R277 R276 zi 470K 470K 6 CRED Ec 1 on m 808 X 707777770772 AN fau ee n gt FROM MAIN CHASSIS CIRCUIT BOARD E kt 52 522 TO CONTROL SS SS ST PS 60 8 CIRCUIT BOARD fel IRCUIT CRGOI 604 154 EJ ERCO4 06 Noe CR603 NORMAL ES RM R237 SERVICE 6 1500 DC 35A FUSE 5 R609 gs 2509 80 Soop TER J 604 HORIZ R452 iw R42l R410 CUN 27K 25 Ks IK 3900 wes 92004 407 R408 7942019 56K 27K 2 I Leg 3 AE L AC INPUT 19 f C413 R420 C405 T R406 015 ji 5600 068 LAI 15 L 22 5082 PU m 407 cell R488 484 M av 14 lis z tis fis 202 zz 23 24 4 KE IC40 141464 6 CONTROL T40 ICIRCUIT BD R423 0281 8 RESISTOR O R472 CR455 Fl 47K RM IZ d TO PICTURE C483 C455 R457 a F 390 047 47 gt m 454 LASS Xea LA 3300 5600 56 8 R458 R466
14. RT anode average current is less than 650 uA High voltage is 24 1 5 KV 1 105 1 0V B 2 19 5 20 3 regulated 12 10V 4 regulated 175 SOY Heater Voltage 6 4 0 2 V RMS D CRT Specifications Convergence Tolerance max 0 2 of raster width center of screen max 0 5 of raster width corners of screen Purity Color purity should be practically uniform all over screen after being degaussed with hand held degaussing coil 15 75 KHz 200 Hz More than 8 Hz Pull In Range Horizontal Pull In Range Vertical Type of CRT 370ECB22 14 Inch 90 declination is within 2 E Connectors 6 Pin Connector for Video Signals Tilt of Deflection Yoke Pin 1 Red Pin 2 Green Pin 3 Pin 4 Ground Pin 5 Sync 3 Pin Connector for Power Pin 12 100 VAC Pin 2 100 F Pattern Size You should be able to reproduce the following sizes of patterns Maximum size Minimum size CRT 3 Adjustable Controls A Brightness Remember to observe the precautions regarding high voltages when you make any adjustments on this monitor Note that before you adjust the brightness the monitor should have been turned on for at least 5 minutes Keep the game in the attract or play mode Find the small white knob underneath the screen located at the far right on the Control Printed Circuit Board or PCB see Figure 2 Turn this brightness or
15. a normal screen image C Vertical Hold Use this adjustment if the picture drifts straight up or down on the screen The vertical hold control is the second potentiometer from the left on the Control PCB as you face the monitor s screen see Figure 2 Turn this control in either direction until the pic ture no longer drifts straight up or down on the screen D Vertical Height If the screen image is not large enough or too large vertically then you can adjust it very easily with this control Using this control will stretch or compress the image vertically The vertical height control affects the spacing between the raster lines equally Set the game for the diagnostic that displays the Sanyo Color Monitor convergence grid and dots Locate the vertical height control on the monitor s Control PCB it is the Knob on the far left underneath the screen Turn this control until the top and bottom grid lines run along the edges of the screen The lines should not disappear off the edges which would indicate over scanning E Horizontal Width Before using this control be sure the monitor has been turned on for 5 minutes or more If the screen image is too wide or narrow you should use this control to adjust it for proper width Set the game for the diagnostic that displays the convergence grid and dots Locate the horizontal width control on the monitors Main PCB it is the coil at the center of this board direc
16. diately proceed with Sec tion 2 below 2 Dynamic Convergence Outer Area Be sure to keep the same convergence pattern on the screen white lines and dots with black background Using a razor blade or thin knife carefully loosen the glue holding the three rubber wedges and remove them Be sure both the magnet and deflection yoke mounting screws are loosened Sanyo Color Monitor Slide the yoke slightly away from the picture tube Up down movement of the yoke causes the outer edges of the screen image to swivel clockwise or counterclockwise Side to side movement causes the lines and dots at the outer screen edges to ex pand and contract Move the yoke in the up down and side to side directions until the outer lines and dots on the screen are pure white Then secure the deflection yoke by putting the wedges back in between the picture tube and the yoke s white collar Secure the wedges with glue Tighten the screws that secure the deflection yoke clamp and the magnets 9 Schematic and Illustrated Parts Lists The purpose of this chapter is to provide you with the necessary information for ordering replacement parts for your Sanyo 14 color monitor Please note that for simplicity common hardware and certain other parts have been deleted from this parts list This includes screws nuts washers certain con nectors and tie wraps in addition to metal parts such as heat sinks shields and supports When ordering
17. ecessary for a uni formly green screen 4 Blue Purity Adjustment Turn off the red and blue guns by using the con trols on the neck board leave the blue gun on Repeat the purity adjustment for a uniformly blue screen 5 Final Check As a final check for total color purity turn on all guns again Leave the all white self test pattern on the screen The screen should be pure clean white not tinted with other hues Finally reinstall the monitor in the game B Convergence Adjustments 1 Static Convergence Center Area First remove the monitor from the game but leave the connectors still attached f you will also be converging the outer area of the picture see Section 2 that follows you should loosen both the deflection yoke and magnet moun ting screws at this time Display the diagnostics pattern that shows black background with white lines and dots Keep this display throughout all convergence adjustments Refer to Figure 3 and turn off the green gun with the G bias or cutoff control located on the neck board Leave the red and blue guns on Adjust the angle of the 4 pole or center pair of magnets and superimpose the red and blue vertical lines in the center area of the screen Keeping their angles the same rotate both tabs of the 4 pole magnets to superimpose the red and blue horizontal lines in the center area of the screen Turn on the green gun again Adjust the angle of the 6 pole or rear pa
18. ection Transformer 401 Horizontal Drive Transformer 7451 Flyback Transformer 7452 NPN Transistor TR902 NPN Transistor TR901 NPN Transistor Damper TR904 NPN Transistor TR201 203 208 PNP Transistor TR210 NPN Transistor TR451 NPN Transistor 251 253 1 01 02 Diode CR455 Type RU1 Diode CR453 Type RU2 Diode CR454 456 RC2 Diode CR452 ERCO04 06 Diode CR601 604 EQA01 05S Diode CR451 Type 151555 Diode CR205 209 211 213 401 402 Type EQA01 11 Diode CR204 Focus Resistor VR902 PTH451CO5 Posistor 5601 SDT 500 Thermistor TH201 100K Ohm 14W Metal Film Resistor R610 5600 Ohm 14W Metal Film Resistor R608 33 Ohm gt Metal Film Resistor R409 3 9 Ohm 1W Metal Film Resistor R481 390 Ohm 2W Metal Film Resistor R474 560 Ohm 1W Metal Oxide Resistor R244 10K Ohm 2W Metal Oxide Resistor R463 6800 Ohm 2W Metal Oxide Resistor R418 1200 Ohm 3W Metal Oxide Resistor R604 3300 Ohm 3W Metal Oxide Resistor R466 180 Ohm 20W Wirewound Resistor R609 2 0 Ohm 20 Wirewound Resistor R601 1 0 Ohm 1W Metal Oxide Resistor R273 5600 Ohm 1W Metal Oxide Resistor R253 257 261 470 uf 10V Electrolytic Capacitor C609 10 uf 16V Electrolytic Capacitor C479 Atari Part 99 160302 99 160303 99 160304 99 160305 99 160306 99 160307 99 160308 99 160309 99 160310 99 160311 99 16
19. g a 5 16 hex socket wrench remove the four screws that hold the picture tube in the steel frame Carefully remove the tube by pull ing it out towards the front B Yoke Replacement You need to reconverge the picture whenever you replace a yoke First unplug the power and video signal connec tors Remove monitor assembly from game 1 2 Discharge the high voltage from the tube Unplug the neck board at rear of picture tube Using a thin knife or single edged razor blade carefully loosen the rubber wedges from the picture tube surface 3 Loosen the Phillips screws that tighten the two neck clamps around the neck Now slide the magnet assembly then the yoke assembly off the end of the picture tube C Flyback Transformer Replacement First unplug the power and video signal connec tors Remove monitor assembly from game 1 Discharge the high voltage from the tube the large anode connector at top of pic ture tube Also open the white twist and tie anode holder and remove the anode wire from this holder 2 Unplug the neck board at rear of picture tube Unplug the two white wires at the very top of the FOCUS adjustment bracket 3 Remove the two small hex nuts and the Phillips screw that secure the flyback transformer cover plate 4 Unsolder the 9 connections for the transformer on the circuit or bottom side of the Main PCB 9 Now lift out the transformer When replacing with a new
20. ir of magnets and superimpose the green vertical lines on the red blue ones in the center area of the screen Finally keeping their angles the same rotate both tabs of the 6 pole magnets to superimpose the green horizontal lines on the red blue ones Sanyo Color Monitor FROM MAIN BOARD MAIN CHASSIS CIRCUIT BOARD 088540 E T 0 E8 5 CONTROL CIRCUIT 3 1 CONTROL CIRCUIT 22 TUBE SOCKET BOARD 6 IBOARD 0885383 0 10 1251 1253 L254 5 VR352 A LXXJI5O R257 3 470 8 507 K SYNC BHE 6 F 6 5600 J 25536 F 6 BLUE OUTPUT AAA 20 TR203 204 206 CR208 R221 GROUND 2560536 F G X3 2SC536 EFG X3 680 355 PICTURE FROM BLUE FOCUS EE INPUT SOCKET D4OO2X RESISTOR MAI R242 ua 3184 CHASSIS 820 E 554 CIRCUIT 91589 IK BLUE BIAS r S B 200K h BOARD RED 60 oy INPUT e Her PICTURE 8205 370 22 4 MTS 3 IK 8 200 5600 8265 D LL s 8 GREEN DRIVE 5 Be JAEN INPUT BHI E rl B234 GROUNDING R240 00 IQQK R278 CONNE
21. parts from your distributor give the part number part name and serial number of your game This will help to avoid confusion and mistakes in your order We hope the results will be less downtime and more profit from your game 11 Sanyo Color Monitor duy wose LIDI Note All diode reference designations Dxxx have been changed to CRxxx the stan dard American nomenclature b V 9 609 lt a Ww 0 lt n m U N O2 HL y R403 R234 1 sO R489 F Y N 5 s NN x 7 m n 6 m JE 0 R294 xm R243 42 241 9 Ol I m 5 R242 sO d 5 NO Lez IEZA Cek 0123 Jm 6 229 Oses 5 9172 44921 07 i 0 M g as DDED Qi SENI A5 N A m 5 5 WwW A N omi 3 CL i 22 R466 213 ES RI amp E J gt 5 204 5 0 w C486 v crz A 9 22 TR 9 4 ck206 R 5 5 111 8 m 7 452 x gt 7 R42 C i TN nud 2 455 2 C404 1 z E oe O C403 nt 25 B 7 Rolo AJUS 2 7 70 0 8 6 ps D R492 essag TE
22. re rushed with repair work you ll still automatically take precautions A good practice when working on any TV monitor is to first ground the chassis and use only one hand when testing circuitry This will avoid the possibility of carelessly putting one hand on the chassis or ground and the other on an electrical connection Doing so could cause a severe electrical shock If you service this color monitor on a test bench you must isolate the monitor from AC line voltage An isolation transformer is mandatory for your own safety The Sanyo monitor does not contain an isola tion transformer on its chassis It is mounted stead on the game power supply It may appear like a regular power transformer but is really also an isolation transformer C Picture Tube Handling Use extreme care when handling the picture tube since rough handling may cause it to implode due to a vacuum inside Do not nick or scratch the glass or subject it to any undue pressure when removing or installing it Wear safety goggles and heavy gloves for protec tion when handling the picture tube Keep others without safety goggles away Do not lift the tube by the neck Figure 1 Overview of Sanyo 14 Color TV Monitor Sanyo Color Monitor Discharge the high voltage in the picture tube by shorting the anode connection to chassis ground not the cabinet or other mounting parts When discharging go from ground to anode and use a well ins
23. tly underneath the yoke Be sure to use only a non metal Allen wrench commonly called a tweaking tool for this adjustment Turn this control until the right and left grid lines run along the edges of the screen The lines should not disappear off the edges which would indicate overscanning F Focus This control simply changes the sharpness of the screen image The white focus adjustment knob is located on the plastic bracket above the flyback transformer Turn this control until you get the op timum screen sharpness possible GREEN BIAS CUT OFF BLUE BIAS RED BIAS BLUE DRIVE RED DRIVE BOTTOM Figure Adjustable Controls on Neck PCB SCREEN VOLTAGE Sanyo Color Monitor 4 Supply Voltages To test for proper 105V supply locate the test point TP91 at the front end of the very large 20 watt resistor R609 This resistor is in the center rear area of the Main PCB Connect a voltmeter at this point and to ground Adjust the brightness control on the Neck PCB to maximum Use the nearby potentiometer VR601 on the monitors Main PCB that is labeled B AD JUSTMENT in Figure 2 Turn this pot until the meter reads 105V Then return the brightness con 1 trol to normal 5 Signal Test Points A RGB Signals The blue red and green signals can be tested at the points labeled ED EE and EA respectively These are located on the back of the Neck PCB B Horizontal and Vertical Sync
24. ulated piece of wire D Replacing with Proper Components It is important to maintain the specified values and failure characteristics of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or in operating supply voltages Refer to the parts lists in the back of this manual and use only exact replacement parts especially for the picture tube semiconductors transformers coils and fuses If you replace the picture tube with another type not specified in the parts list then avoid prolonged exposure at close range to the unshielded areas of the tube You may endanger yourself from necessary exposure to X ray radiation E Final Testing Before Reinstalling Monitor Before installing the color monitor back in the game you must check the following 1 Inspect all harness wiring on the monitor and be sure none of it is pinched between the chassis and other metal parts in the monitor 2 Replace all protective devices such as insula ting fishpaper compartment covers and shields Sanyo Color Monitor 2 Specifications A Power Input and Ei Consumption Line Voltage A C 100V 1096 Line Frequency 50 60 Hertz Power Consumption 46 Watts B Temperatures and Humidity Environmental Temp Environmental Humidity Temp Inside Game Cabinet 5 35 C 41 95 20 95 45 max 112 Currents and Voltages The C
Download Pdf Manuals
Related Search