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Toshiba TW40F80 Quick Reference Manual

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QUICK REFERENCE GUIDE
N5SS CHASSIS
PROJECTION TELEVISION
©1997 TOSHIBA AMERICA CONSUMER PRODUCTS, INC.
NATIONAL SERVICE DIVISION
TRAINING DEPARTMENT
1420-B TOSHIBA DRIVE
LEBANON, TENNESSEE 37087
PHONE: (615) 449-2360
FAX: (615) 444-7520
www.toshiba.com/tacp
TW40F80
NTDPJTV06
REV 1297

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Summary of Contents for Toshiba TW40F80

  • Page 1 NTDPJTV06 REV 1297 QUICK REFERENCE GUIDE N5SS CHASSIS PROJECTION TELEVISION TW40F80 ©1997 TOSHIBA AMERICA CONSUMER PRODUCTS, INC. NATIONAL SERVICE DIVISION TRAINING DEPARTMENT 1420-B TOSHIBA DRIVE LEBANON, TENNESSEE 37087 PHONE: (615) 449-2360 FAX: (615) 444-7520 www.toshiba.com/tacp...

  • Page 2: Table Of Contents

    Contents DISASSEMBLY ............3 1. Front............................... 3 2. Rear ................................ 5 CRT ADJUSTMENTS ..........6 1. Template Instructions ........................... 6 2. Optical and Electrical Focus ........................ 6 3. Mechanical Tilt ........................... 7 4. User Convergence ..........................8 5. Magnetic Centering ..........................8 6.

  • Page 3: Disassembly

    DISASSEMBLY 1. Front 3. Retract the two screws located near the bottom of the x-ray shield. Loosen the top two screws. Slide the shield to the right and downward, then pull it away from the cabinet. 1. Retract the two screws located at the bottom of the speaker grill.
  • Page 4 6. Retract the four screws located at the bottom of the bezel. Pull the bezel away from the cabinet while lowering the top of the bezel to the floor. The bezel will still be attached to the cabinet via the Front-control board’s wire harness.

  • Page 5: Rear

    6. Stand both chassis frames up on end grey plastic tray to the inside of the cabinet with the solder sides of the PC boards facing and remove the tray. outward. The TW40F80 is now in the proper service position.

  • Page 6: Crt Adjustments

    15 minutes before making CRT other cleaning substance may cause adjustments. damage. The TW40F80 and TW56F80 should be in the Both the TW40F80 and TW56F80 are WIDE 1 picture size for these adjustments. converged at four separate screens. In order to reduce the number of times a template 1.

  • Page 7: Mechanical Tilt

    4. Select the WIDE 1 picture size with the 12. Push the RTN key to turn on the blue PIC SIZE key on the TW40F80 and TW56F80. tube, and the 100 key to turn off the red tube. 5. Push the 100 key to turn off the red 13.

  • Page 8: User Convergence

    1. Turn the power on. 1. Enter the service adjustment mode. Use the TV/VIDEO key to select the white 2. Put the TW40F80 and TW56F80 in the cross bar on black background test pattern. FULL picture size. 2. Rotate the centering rings on the green 3.

  • Page 9: Green Geometry

    4. Check the centering of the cross bar parallax errors. pattern with the centering notches in the bezel on the TP50F50/51. For the TW40F80 and NOTE: If the microcomputer memory IC TW56F80, use two pieces of string stretched (QA02) has been reset or replaced, or the...

  • Page 10: Red Convergence

    WIDE 1. The convergence steps must be repeated for all crosshatch pattern does a one second distor- picture sizes on the TW40F80 and the tion, indicating the FULL convergence set- TW56F80. tings have been saved.

  • Page 11: Blue Convergence

    8. Turn the set back on and check the overall picture quality with a live video signal. 11. From the on screen menu, turn the Check all the picture sizes on the TW40F80 customer color control to minimum. and TW56F80. If all the picture sizes look good, put the set back together.

  • Page 12: Wid, Hit, & Vlin

    12. Adjust the following registers for 11. WID, HIT, & VLIN proper gray scale tracking from white to black: NOTE: See the NOTES in Section 7, a) RDRV and BDRV for light gray and before performing the following procedure. white areas of the screen. 1.

  • Page 13: Block Diagrams

    REMOTE SENSOR KEY B IC501 H001 HY01 H002 V/C/D MAIN IF/MTS/A.PRO PROCESSING TUNER TUNER/IF KEY A SDA1 QA01 SCL1 MICRO- COMPUTER Q701 QV01 QK06 Q302 CONV. AUTO LIVE DPC CIRCUIT 40" PROCESSOR SWITCHING CIRCUIT UM01 RMT OUT NEW OSD/EDS/CC RGB SW. ------------- STARSIGHT IC D12...

  • Page 14: Power Supply

    2. Power Supply T840 +5VDC STANDBY POWER TO MICROCOMPUTER REGULATOR RESET TRANS +12VDC +5VDC +30VDC SWITCH +9VDC RELAY MODE +15VDC 120VAC (SUB) -15VDC -9VDC +12VDC SWITCH +38VDC MODE (MAIN) +125VDC FEEDBACK POWER POWER 125V B+ MONITOR AND Z801 ON/OFF FROM 125V OVERCURRENT CONTROL/PROTECTION MICROCOMPUTER...

  • Page 15: Video

    CV TO VIDEO OUT JACK AND NEW OSD EDS/CC BOARD TEST 3D - Y/C CV/Y COMB VIDEO - 1 FILTER CV/Y VIDEO - 3 EO31Z RED CRT RED CRT DRIVE HY01 POP SWITCH ANT 1 TUNER/IF EO32Z GRN CRT GREEN CRT H002 H001 MAIN...

  • Page 16: A U D I O 1

    T E S T S I G N A L F R O M Q A 0 1 Q V 0 1 A U D I O 2 A U D I O 1 S W I T C H I N G M O N O A U D I O F R O M H Y 0 1 A U D I O 3 P O P T U N E R...

  • Page 17: Deflection

    5. Deflection T400 DYNAMIC FOCUS 30.7KV AC TO HEATERS DIST. TO CRT BLOCK ANODES T461 +22V DC TO X-RAY PROTECT +12V DC FLYBACK FOCUS & TRANSFORMER +35V DC FOCUS SCREEN DRIVE BLOCK -27V DC TO CRTs +200V DC +125V DC FROM TO ABL MAIN POWER CIRCUIT...

  • Page 18: Troubleshooting Flow Charts

    UNIT POWERS UP TROUBLESHOOTING MOMENTARILY THEN SHUTS DOWN SHUTDOWN CIRCUITS THE PROBLEM MAY Z801-16 GOES FROM NOT BE A SHUTDOWN HIGH TO LOW? CONDITION. MONITOR Z801-13 . MONITOR Z801-14. DOES VOLTAGE GO VOLTAGE ACROSS R470 DOES VOLTAGE GO ABOVE APPROX. ABOVE 1.7V? ABOVE 1.5 V? 25 V?

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