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LG 34GL750 Service Manual
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LG 34GL750 Service Manual

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LED MONITOR
SERVICE MANUAL
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO :
P/NO : MFL70211518 (1904-REV00)
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
LM71C
34GL750
CONFIDENTIAL
34GL750-BB

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Summary of Contents for LG 34GL750

  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

  • Page 2: Table Of Contents

    SAFETY PRECAUTIONS ................ 3 SPECIFICATION ..................4 ADJUSTMENT INSTRUCTION ..............6 BLOCK DIAGRAM ................... 7 EXPLODED VIEW ..................8 DISASSEMBLY ..................9 TROUBLE SHOOTING GUIDE .............. 11 - 2 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Safety Precautions

    When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Specification

    Color Black Impedance 1) Cable : 100Ω±5Ω, 2) Connector : 100Ω±5Ω Power Output: DC 19V 3.42A,65W Adapter (Adapter) Color : Black, Weight : 0.205kg±10% - 4 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 5 H(Pixels) 135.60 2720 2560 2560x1080（only HDMI 2.0 368.83 V(Lines) 1130 1080 和DP） H(Pixels) 162.72 2720 2560 2560x1080（only HDMI 2.0 442.60 V(Lines) 1130 1080 和DP） - 5 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 6: Block Diagram

    BLOCK DIAGRAM - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Exploded View

    It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 8: Disassembly

    2) Pull a button and disassemble a stand The thumb make it easy. (the principles of the lever) : Push a back cover - Using thumb, pull a jig upwards. - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 - Put a jig at the top corner ⑨ Top 5) Disassemble screws (10ea) : Module + Cabinet - Pull a jig into the center. (Other hands push up a backcover) - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 10: Trouble Shooting Guide

    Check IC705 Output Replace IC705 & Voltage Level (2.5V, 1.2V) Recheck Check X100 Clock Replace X100 27MHz Replace IC107 Flash Memory - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 P300 (#9, 10, 36, 37) Check FFC Cable for Damage or Replace FFCable Open Conductors Replace T-Con Board or Module - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 12 Check IC102 AUX Signal Replace the IC102 (#J1,H1) Check IC103 AUX Signal Replace the IC103 (#3,4) Replace the G-SYNC Module - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Check IC101 AUX Signal Replace the IC101 (#29,30) Check IC103 AUX Signal Replace the IC103 (#3,4) Replace the G-SYNC Module - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...

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