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LG OLED77W9PUA Service Manual
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LG OLED77W9PUA Service Manual

Chassis : ea91w
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OLED TV
SERVICE MANUAL
CHASSIS : EA91W
MODEL : OLED77W9PUA
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71389702 (1902-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.
CONFIDENTIAL

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Summary of Contents for LG OLED77W9PUA

  • 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

    SPECIFICATION ..................6 SOFTWARE UPDATE ................9 BLOCK DIAGRAM ................. 10 EXPLODED VIEW .................. 15 DISASSEMBLY GUIDE ............APPENDIX TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics Inc. All rights reserved. Only for 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 for training and service purposes.

  • Page 4: Servicing Precautions

    - 4 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 5 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top. - 5 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 6: Specification

    Optical Audio out Rear(1EA) HeadPhone(1EA) HeadPhone out Rear(1EA) USB Input(3EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Ethernet Connect (1EA) Ethernet Connect - 6 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 7 SDTV, DVD 480I(525I) 720*576 15.62 13.5 SDTV, DVD 576I(625I) 50Hz 720*480 31.47 59.94 SDTV 480P 720*480 31.5 27.02 SDTV 480P 720*576 31.25 SDTV 576P - 7 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 8 UDTV 2160P 4096*2160 134.86 59.94 593.4 UDTV 2160P 4096*2160 UDTV 2160P 4096*2160 1188 UDTV 2160P 4096*2160 1188 UDTV 2160P 2560*1440 88.78 241.5 2560*1440 497.7 - 8 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 9: Software Update

    (5) After finished the update, below Pop-up appear (6) Turn OFF the TV and On. Check the updated SW Version and Tool Option - 9 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 10: Block Diagram

    BLOCK DIAGRAM 1. Main - 10 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 11 2. Tuner - 11 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 12 3. Video & Audio IN/OUT - 12 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 13 4. HDMI - 13 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 14 5. USB / Wi-Fi / M-Remote / UART - 14 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 15: 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. - 15 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 16: Disassembly Guide

    OLED77W9 - Disassembly Guide Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 17 ※ Follow the Manual. (1-1, 1-2, 2-1, 2-2, ... ) (1-1) Put the soft cloth and set AIO Box as indicated below picture. (1-2) Stand AIO Box as indicated below picture. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 18 (2-1) Disassemble screw 8EA. (Top Cover Ass’y – Middle Bottom Ass’y – Rear Cover Ass’y) (2-2) Disassemble screw 8EA. (Middle Bottom Ass’y – Rear Cover Ass’y) Top View Front View Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 19 (3-1) Disassemble Cover, Bottom Rear that is assembled with latch 9 points (Disassembly direction : from Right to Left) Push the Cover, Bottom Rear both side and pull as indicated below picture. Cover, Bottom Rear Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 20 (4-4) Before open the Ass’y Cover Top, you have to disconnect cable (2points). Ass’y, CoverTop After disassemble Cover, Bottom Rear ※ For disassembly guide of Ass’y Cover Top item, refer to (19-1)~(23) term. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 21 (5-1) Disassemble screw 4ea that is fixing of Speaker R. (5-2) Disassemble screw 4ea that is fixing of Speaker R. (5-3) Disconnect Speaker cable. Speaker, R Speaker, L After disassemble Ass’y, CoverTop Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 22 . (4points) (6-2) Disassemble screw 4EA. (6-3) Remove PCB 2EA and EMI Tape 4EA and put the cable right side. After disassemble Speaker 6-1,2 6-1,2 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 23 OLED77W9 – Disassembly Guide (7-1) ~ (7-2) Disconnect Power Cord. Power Cord Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 24 (8-4) ~ (8-6) Disconnect the cable. (8-7) Remove Power. (Warning: Hold end of the Power PCB to prevent ELECTRONIC SHOCK.) After disassemble Plate Power Shield Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 25 * In case of (9-2), the screw is covered with Insulation sheet, disassemble the screw after lift end of the Insulation Sheet. After Power Bottom Shield disassemble Power Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 26 OLED77W9 – Disassembly Guide (10-1) Lift right of Power Bottom Shield. (10-2) Disconnect cable below of left of Power Bottom Shield (3points). 10-2 10-2 10-2 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 27 (11-3) Disconnect the cable from Main PCB and Sub Main PCB. Main PCB After disassemble T-Con PCB Main PCB Power Bottom Shield 11-1 11-3 11-2 11-1 11-1 11-2 11-3 11-3 11-3 11-2 11-3 11-2 11-3 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 28 Main PCB 12-3 12-2 12-1 12-3 12-3 12-2 12-2 12-1 12-1 12-1 12-1 12-3 12-3 12-2 12-1 12-1 12-2 12-4 Gap Pad Gap Pad Gap Pad Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 29 OLED77W9 – Disassembly Guide (13-1) Disassemble cable from holder. Disconnect cable 2ea from LED Lighting. Middle Cabinet LED Lighting After disassemble T-Con/Main PCB 13-1 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 30 (14-1, 14-2)Push the latch and pull the end of the right side of LED Lighting to disassemble LED Lighting. (Latch is 4ea) Refer the below picture. LED Lighting 14-1 14-1 14-1 14-1 Direction 14-1 14-2 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 31 OLED77W9 – Disassembly Guide (15-1) Disassemble screw 1EA and remove Power Cord. Power Cord 15-1 15-1 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 32 16-1 16-1 16-1 16-1 16-1 16-1 After disassemble Bottom Plate LED Lighting, Power Cord 16-1 16-1 16-2 16-3 16-2 16-2 16-2 16-2 16-2 16-3 16-4 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 33 (17-3) Disassemble cable from Cover, Bottom and disassemble WiFi Bracket. Indicator After Cover, Bottom disassemble Wifi Joystick Middle Cabinet 17-1 17-2 17-2 17-2 17-1 17-3 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 34 After disassemble Joystick Indicator Wifi 18-1 18-1 18-1 18-2 18-2 18-2 18-2 18-1 ☞ Done Disassembly Guide for Cover Top Assy start from next page. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 35 Front of Set 19-2 19-2 19-2 19-2 Caution!! When removing Top Cover and Moving Ass’y, do not hold the drive shaft and switch by hand. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 36 Rear of Set Front of Set 20-2 20-1 Rear of Set Front of Set ※ Rib of moving Ass’y is inserted into projection part(‘┌’shape) of Cover Top. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 37 (21-1)~(21-2) Turn the side projection of the Moving Ass’y in the direction of arrow mark. ※ Handle with care and slowly to avoid damage. ※ Do not force to the product strongly. 21-1 21-2 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 38 (22-2) Disassemble screw (4EA) that is fixing Sliding Cover. ※ Handle with care and slowly to avoid damage. ※ Do not force to the product strongly. 22-1 22-2 21-2 21-2 21-2 21-2 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 39 ■ When replacing the Sliding Cover or Top cover, Check that there is no color difference between Cover Top and Sliding Cover. Cover Top. Sliding Cover. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 40 Smart JIG Power Diagnosis Muitl Gender Guide (P/N : RAD32507801) (P/N : RAD33187801) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 41 24 Marking Check UK74,UK75 28Pin 28Pin 12Pin 12Pin 28Pin UK77,UK78 Cable Connection SK79 Includes 49UJ63 SM80/SM86 16/18Y/19Y 17Y/18Y 16Y/17Y 16Y/17Y/18Y/19Y (UH) (UH/SJ) (SJ/UJ/UK/SK) (UH/UK/UM (LH/LJ/LK/LM) Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 42 UJ65/UJ68, UJ63/UJ67 LJ61/LJ68, LJ55/LJ58 SK80/SK85/SK95 UK78/UK75/UK77/SK79 ‘18 UK63/UK64/UK65/UK68/UK7050 LK57, 32/43/49LK54, 32LK61/62, 43/49LK61 ‘18 OLED B8, C8, E8, G8, W8 SM80/SM85/SM86 ‘19 UM73/UM74/UM75/UM76/UM79/UM80 LM57/LM63 ‘19 OLED B9/C9/E9/W9 Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 43 ▶ Power Board Muitl Gender JIG “A: 2013 LCD POWER” 2014 ▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 44 - 20V Power Board : Change the switch to 24V of Smart Jig Voltage - 13.2V/18V Power Board : Change the switch to 24V of Smart Jig Voltage Power B/D Smart Jig Voltage Switch 13.2V/18V Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 45 ▶ Fix the LCD MODEL switch to 24V.(Smart JIG) ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 46 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 47 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 48 ▶ When the OK LED(24V,12V) turns on, Power Board is normal. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 49 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 50 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 51 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 52 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 53 ▶ Connect the 18Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 54 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 55 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 56 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 57 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 58 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board can be judged as defective. Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.