LG 34WN80C Service Manual

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LED MONITOR

SERVICE MANUAL

CHASSIS :

MODEL :

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL69413820 (1908-REV00)

P/NO :

LM20G

34WN80C

CONFIDENTIAL

34WN80C-BK

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Summary of Contents for LG 34WN80C

Page 1 SERVICE MANUAL CHASSIS : LM20G MODEL : 34WN80C 34WN80C-BK CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : P/NO : MFL69413820 (1908-REV00) Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 2: Table Of Contents
SAFETY PRECAUTIONS ................ 3 SPECIFICATION ..................4 BLOCK DIAGRAM ................... 7 EXPLODED VIEW ..................8 TROUBLE SHOOTING GUIDE ..............9 TRANING MANUAL ..............APPENDIX - 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
Output: DC 19V 7.37A, 140W Adapter Refer to BOM Color: White, Weight : 0.58kg ±10% Request to Power Rating Input : DC 19V / 7.0A regulation team Accessory Box - 4 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 5 49.99 1474 1440 H(Pixels) 319.75 88.82 3600 3440 3440 x 1440 V(Lines) 59.97 1481 1440 * (1) DP / USB-C / HDMI Preferred timing - 5 - 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: Trouble Shooting Guide
Replace IC600, IC403, IC404 Check IC600, IC403, IC404 Output &Recheck Voltage Level (5V,1.8V, 1.15V) Check X200 Clock Replace X200 12MHz Replace IC202 Flash Memory - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 9 (IC600, 601 Pin #27) Check Panel Power Replace IC402 & 10V(JP209) Recheck Check e-DP Cable for Damage or Open Replace Cable Conductors Replace T-Con Board or Module - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 10 Damage or Open Connector Check JK100,JK10 1 for proper Replace Connector connection or Damage Check HDMI 5V from Source(PC) (JK100,JK101) (Pin No. 18) Replace Main Scaler (IC200) - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 11 Check DP Cable for Damage or Open Connector Check JK102 for proper Replace Connector connection or Damage Check A UX Signal (R137or R142) Replace Main Scaler (IC200) - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 12 Damaged or Open Connector Check the sound setting Setting like a right in PC image. Do re-soldering Check JK501 Soldering Replace Main Scal er (IC200) - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 13 Damaged or Open Connector Check Speaker Cable is Connect the Cable connected correctl y Replace Speaker and Replace Main Scal er Check the status (IC200) - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 15 D-SUB HDMI RS-232C Audio Out Back Side Jack W/O Stand W/O Stand Size Weght (W x D x H) 814.0x569.5 814.0x359.1 8.0kg 6.3kg x250.8 x92.9 Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 20 -. Base Cover (34WL85C Common) -. Joystick PCB (34WL85C Common) - 34” : LGD (34WL85C -. Base Casting (34WL85C Common) -. Button Bracket (34WL85C Common) -. Foot Rubber(Common) Common) Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 21 3. Detail Content ■ Middle Cabinet Material High -. ABS HF350 Black (Texture LG1002-G + Side High Glossy) Glossy Textur ■ Back Cover Assy Material -. ABS HF350 Black (Texture LG1002-G, Carving : High glossy) High Glossy Vent hole Textur One click HAS ready...
Page 22 1-4 Cable Side Cover, L : Common Use 1-2 Main PCB 1-5 One Click Button : Common Use 1-4 Cable Side Cover, L 1-3 Cable Side Cover, R 1-5 One Click Bracket Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 23 1. Place the monitor’s screen face down on a front 1-1. Tool (Plastic Jig and Driver) packing or soft jig plate (1300R) 2. Disassemble the Stand body with pulling down the butt Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 24 : Sequence is like a below. ④ ③ ② ① ① ② ③ ④ ⑤ ⑤ ⑥ ⑥ ⑦ ⑦ ⑧ ⑧ ⑨ Disassemble the back cover (Latch Type) Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 25 4. Disassembly method 4. Chassis A’ssy After Back Cover separation, remove side cable cover 2. Disassemble Rear Shield Assy (Screw 2EA) Remove Cable connector by hand Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 28 VBUS=5V / 0.9A DC-DC USB 2.0 UP CC communication VBUS=5V / 0.9A USB Type-C HDMI 1 HDMI 2 HP Out ( HDMI 2.0 ) (DP1.4) Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 29 5. Main PCB Layout USB Type-C eDP (30P) DOWN DOWN H/P out HDMI1 Power HDMI2 Control Key LED DRIVER Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 30 8. USB Hub IC : function of HUB to the PC, should be connect to the PC with USB-C/C or USB-C/A cable. Location No. : IC700 Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 32 By using C.C channel (pin), various Power Delivery (5V, 9V, 15V, 19V) * Additional function Ready (ex. Audio Accessory mode : headphone, mic, and etc) Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 33 -Through USB C-A gender, only data -Monitor f/w update may be needed, and problem may take Transmission is possible. place depending on OS version (Mac book / Chrome book) Copyright © 2012 LG Electronics Inc. All rights reserved. Only for training and service purposes...

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Summary of Contents for LG 34WN80C

Page 2: Table Of Contents

Page 3: Safety Precautions

Page 4: Specification

Page 6: Block Diagram

Page 7: Exploded View

Page 8: Trouble Shooting Guide

This manual is also suitable for: