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LG FLATRON IPS234V Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : LM12E
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
IPS234V
(IPS234V-**A)
Internal Use Only

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Summary of Contents for LG FLATRON IPS234V

  • Page 1 Internal Use Only Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM12E MODEL: IPS234V (IPS234V-**A) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    : 3.1 kg Gross Weight : 4.4 kg HDMI: Horizontal : 30 ~ 83kHz Vertical : 56 ~ 61Hz 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

    1680 x 146.25 1050 V(Lines) 59.954 1089 1050 H(Pixels) 67.50 2200 1920 1920 x 148.50 1080 V(Lines) 1125 1080 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 This part function is to collect the any change from the DC output and feed back to the primary through photo transistor. 7. LED driver block This part function is to drive LED Back light. Copyright 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: 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. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 (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. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Troubleshooting Guide

    "IS IC 100 PIN1 (3.3V), PIN3(1.2V) PIN3 (1.2V)?" Check IC101 PIN 42,43 CHECK CRYSTAL(X100) PULSE CHECK IC101 Waveforms JK100#1 IC102#3 IC102#1 IC104#42,43 1.2V Copyright 2010 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 3.TROUBLE IN IC101 CHECK CONNECTION LINE CHECK IC101 PIN 35,36 PULSE FROM D-SUB TO IC101 TROUBLE IN CABLE OR LCD MODULE Copyright 2010 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 CHECK IC101 PIN 35 CHECK H/V SYNC LINE HSYNC, PIN36 VSYNC TROUBLE IN IC101 Waveforms 1 H-SYNC 2 V-SYNC Copyright 2010 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...

  • Page 17: Wiring Diagram

    WIRING DIAGRAM EAD61905271 EAD61426313 MAIN BOARD 6631900011S Copyright 2010 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 MARCH.2012 P/NO : Printed in China MFL66100842...