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LG FLATRON 20EN33SS Service Manual
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LG FLATRON 20EN33SS Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : LM13I
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
20EN33SS
(20EN33SS-BA)
Internal Use Only

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Summary of Contents for LG FLATRON 20EN33SS

  • Page 1 Internal Use Only Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM13I MODEL: 20EN33SS (20EN33SS-BA) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    Horizontal : 30 ~ 83kHz Vertical : 56 ~ 75Hz Net. Weight : 2.2 kg Gross Weight : 3.2kg Copyright 2010 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Precautions

    CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. Copyright 2010 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
  • Page 4 8. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. Copyright 2010 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 IC. circuit board to prevent excessive component temperatures. Copyright 2010 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
  • Page 6 Solder the overlapped area and clip off any excess jumper wire. Copyright 2010 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...

  • Page 7: Timing Chart

    H(Pixels) 67.500 1600 1152 1152 x 108.0 V(Lines) 75.000 H(Pixels) 60.00 1800 1600 1600 x 108.0 V(Lines) 60.00 1000 Copyright 2010 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...

  • Page 8: Disassembly

    1. Pull the front cover upward. 2. Then, let the all latches are separated. 3. Put the front face down. Disassemble back cover. 2010 LG Electronics. Inc. All right reserved. Copyright LGE Internal Use Only Only for training and service purposes...

  • Page 9: Block Diagram

    BLOCK DIAGRAM Copyright 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes...

  • Page 10: Description Of Block Diagram

    The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable. The controlled data of each modes is stored in. Copyright 2010 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Adjustment

    Click “ Write” button c) Remove all default number d) Add 300-3FF e) Click Start button. f) Click Exit button. Copyright 2010 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 (110V/220V) 74LS06 Power LED 4.7K 74LS06 ST Switch V-Sync On/Off Switch (Switch must be ON.) Figure 1. Cable Connection Copyright 2010 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...

  • Page 13: Troubleshooting Guide

    CHECK CRYSTAL(X100) PULSE CHECK IC103 Waveforms IC102 PIN3 (5V) IC103 PIN27 (1.2V) IC103 PIN 25 (3.3V) IC103 PIN42,43 1.2V Copyright 2010 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 3. TROUBLE IN IC103 CHECK CHECK CONNECTION LINE IC103 PIN36(V-SYNC) FROM D-SUB TO IC103 And PIN35(H-SYNC) TROUBLE IN CABLE OR LCD MODULE Copyright 2010 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 INTO DPM MODE CHECK IC103 PIN35,36 CHECK H/V SYNC LINE SYNC PULSE TROUBLE IN IC103 Waveforms 1 H-SYNC 2 V-SYNC Copyright 2010 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 16: Wiring Diagram

    WIRING DIAGRAM LGD:EAD62122568 MAIN BOARD EAD62186001 EAD38438703 6631900011S Copyright 2010 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 2010...
  • Page 19 JANUARY.2013 P/NO : Printed in China MFL67715234...

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