Download
Share
Print this page
LG 27GL850 Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Monitor
  5. UltraGear 27GL850
  6. Service manual

LG 27GL850 Service Manual

Hide thumbs Also See for 27GL850:

Advertisement

Quick Links

LED MONITOR
SERVICE MANUAL
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO :
P/NO : MFL70211519 (1906-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.
LM61C
27GL850
CONFIDENTIAL
27GL850-BB

Advertisement

loading

Related Manuals for LG 27GL850

Summary of Contents for LG 27GL850

  • 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

    65W Ad t 65W Adapter EAY62990913 EAY62990913 Color: Black, Weight: 0.6kg±5% SET accessory / Factory calibration report 0.002kg Refer to BOM KR Suffix : LM270WQA- P/No Specification SSA1-8B9 11 Applying module list P/N : EAJ6538 LM270WQA EAJ65488701 7901 -SSA1 - 4 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 5 V(Lines) 99.95 1510 1440 H(Pixels) 2720 2560 2560 x 1440 (HDMI/DP) 497.75 *HDMI : Only support with Adaptive sync Off V(Lines) 1525 1440 2560 x 1440 (HDMI/DP) H(Pixels) 222.19 2640 2560 586.58 *DP : Preferred timing *HDMI : Only support with Adaptive sync Off V(Lines) 1543 1440 - 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

    1) Place the monitor’s screen face down on a soft plane. 2) Release the screw and disassemble the base 3) Release the screw and disassemble the base - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 7) Remove screws and detach the latches and lines. 8） Disassemble the cabinet. - 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...
  • Page 14                                                                                                                                                                         27GL850         ...
  • Page 15                                                         Note) Refer to ECO about detail of revision history.                    LG electronics...
  • Page 16 LG ELECTRONICS INC. / MONITOR DIVISION  Establish : 2019/03/29  LM61C ADJUSTMENT SPECIFICATION  3/11    Revision : 1  CONTENTS              1.  Application    2.  Designation    3.  Main PCB check process  4.  Total Assembly line process  5.  Shipping condition    6.  Signal composition for adjustment  LG electronics...
  • Page 17 LG ELECTRONICS INC. / MONITOR DIVISION  Establish : 2019/03/29  LM61C ADJUSTMENT SPECIFICATION  4/11    Revision : 1  1. Application  1.1 This document is applied to LM61C chassis 27GL850 LCD Monitor which is manufactured in Monitor Factory or is produced on  the basis of this data.  1.2 Manufacturing Type: SET  1.3 Panel name : LM270WQA‐SSA1    2. Designation      2.1 The adjustment is according to the order which is designated and which must be followed, according to the plan which can  be changed only on agreeing.  2.2. Power Adjustment: Free Voltage  2.3. Magnetic Field Condition: Nil.  2.4. Input signal Unit: Product Specification Standard  2.5. Reserve after operation: Above 5 Minutes (Heat Run)  Temperature : at 25℃±5°C / Relative humidity: 65 ±10% / Input voltage: 100 ~ 240V, 50/60Hz  2.6. Adjustment equipments: Color Analyzer (CA‐210 or CA‐110, UA‐10), DDC Adjustment Jig equipment,      3. Main PCB check process    After Manual‐Insult, executing APC    * APC ‐    3.1 ADC Process    ‐ GL850 doesn’t need ADC process because it has only digital input like DisplayPort, HDMI.      3.2 Main PCB Function test      ‐ Check display/audio according to interface ...
  • Page 18 Save Warm(6500K) Color by commanding COLOR SAVE Command code. (tolerance ±0.010) Insert HDMI Jack which is connected with PC for White Balance or equivalent device. Total Assembly line should check whether the color coordinate(x,y) data refer to below table were meet or not. LG electronics...
  • Page 19 ※ When doing Adjustment, Please make circumstance as below. 4.3 DPM Operation check  ■ Measurement Condition: 100~240V@ 50/60Hz     1) Set Input to DisplayPort, HDMI1, HDMI2 2) Turn off the source device.  3) Check DPM operation refer to the below table.      Sync (H/V)    EUT    Operating Condition  LED(SET)  Wattage(W)  or Video  (MSPG6100)  Sleep mode  Off/Off  Off  Off  0.5W    DC Switch Off  Off mode  ‐  ‐  Off  0.3W    5. Shipping condition        Make sure to do FACTORY RESET at the final process. LG electronics...
  • Page 20 Full Wide   Language  Depend on the sale region   SMART ENERGY  Low      SAVING  Power LED    Automatic Standby Off(EU/EK/PD/EW/MA,4H)   HDMI Compatibility  Off      General  Mode  DisplayPort 1.4  Enable Depend on signal OSD Lock    Serial Number,  Information  Total Power On Time      Resolution  Reset      6. Signal composition for adjustment    6.1 I2C (100K BPS)  LG electronics...
  • Page 21 00  9300K    Aging off &Clear elapsed  11  Elapsed time Clear  E9  00  00  time  Start White Balance  12  WHITEBALANCE_START  ED  00    adjustment (Display  Internal Pattern)  13  Aging On/Off  FF/00 FF:ON / 00:OFF  1:DisplayPort  0xD0  14  Input Select  F4  00  0x90  2:HDMI1  3:HDMI2  0x91  15  SYSTEM RESET  F5  00  00  Restart System  LG electronics...
  • Page 22 24 byte Module selection LM270WQA-SSA1 22    6.5. EEPROM Data Write        6.5.1 Siganl TABLE  START 84+n ADL A     Data_1 . . . Data_n STOP Delay 20m     LEN    :    84h+Bytes    CMD    :    E8h  LG electronics...
  • Page 23 80  3‐Page    80~FF    Read  9      A8  0  4‐Page      0~7F    Read  10        80  4‐Page    80~FF    Read  11      AA  0  5‐Page      0~7F    Read  LG electronics...
  • Page 24         D :    data  8‐byte write    START A Data1 A …. Data8 STOP             L : 0x00,0x10,….0x70    6.6.5 EDID Read  DDC2B Command.(A0/A1)  START START Data1 . . . Data128 STOP           ‐ 128 Byte transfer of EDID Buffer of    MICOM    LG electronics...

This manual is also suitable for:

27gl850-bb