LG OLED77W9PTA Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. OLED TV
  5. OLED77W9PTA
  6. Service manual
LG OLED77W9PTA Service Manual

LG OLED77W9PTA Service Manual

Chassis eb91w
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
OLED TV
SERVICE MANUAL
CHASSIS : EB91W
MODEL : OLED77W9PTA
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71442904 (1903-REV00)
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
OLED77W9PVA
CONFIDENTIAL

Advertisement

Table of Contents
loading

Related Manuals for LG OLED77W9PTA

Summary of Contents for LG OLED77W9PTA

  • Page 1 OLED TV SERVICE MANUAL CHASSIS : EB91W MODEL : OLED77W9PTA OLED77W9PVA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL71442904 (1903-REV00) Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 2 SERVICING PRECAUTIONS ..............4 SPECIFICATION ..................6 SOFTWARE UPDATE ................10 BLOCK DIAGRAM ................. 11 EXPLODED VIEW .................. 12 DISASSEMBLY GUIDE............. APPENDIX TROUBLE SHOOTING GUIDE ..........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: Servicing Precautions

    - 4 - Copyright © LG Electronics Inc. All rights reserved. Only 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 training and service purposes.

  • Page 6: Specification

    PC(HDMI Ver. 1.4), Support HDCP Audio Input DVI Audio, Component, AV SPDIF out SPDIF out USB Input For My Media(Movie/Photo/Music List) or For SVC Ethernet Connect - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Cvbs Input

    1920*1080 33.75 60.00 74.25 HDTV 1080I 1920*1080 56.25 50.00 148.50 HDTV 1080P 1920*1080 67.43 59.94 148.50 HDTV 1080P 1920*1080 67.50 60.00 148.50 HDTV 1080P - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 UHD DEEP COLOUR ON When HDMI1,2,3 4096*2160 134.86 59.94 593.407 UDTV 2160P UHD DEEP COLOUR ON When HDMI1,2,3 4096*2160 135.00 60.00 UDTV 2160P UHD DEEP COLOUR ON - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 297.00 UDTV 2160P 3840*2160 56.25 25.00 297.00 UDTV 2160P 3840*2160 67.5 30.00 297.00 UDTV 2160P 4096*2160 53.95 23.97 296.703 UDTV 2160P 4096*2160 UDTV 2160P - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 (8) After TV turned on, Check the updated SW Version and Tool Option (6) Turn OFF the TV and On. Check the updated SW Version and Tool Option. - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Block Diagram

    BLOCK DIAGRAM - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 12: 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. - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 13: Disassembly Guide

    DISASSEMBLY GUIDE Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 14 ※ 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 15 (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 16 (3-1) Disassemble Cover, Bottom Rear that is assembled with latch 9 points (Working direction : from Right to Left) Push the Cover, Bottom Rear both side and pull as indicated below picture. Cover, Bottom Rear 툭 툭 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 17 (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 18 (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 19 . (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 20 OLED77W8 – Working 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 21 (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 22 * 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 23 OLED77W8 – Working 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 24 (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 25 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 26 OLED77W8 – Working 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 27 (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 28 OLED77W8 – Working 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 29 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 30 (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 31 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 32 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 33 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 34 (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 35 (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 36 ■ 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 37: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 38 E. Noise Circuit noise, mechanical noise F. Exterior defect Exterior defect First of all, Check whether there is SVC Bulletin in GSCS System for these model. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 39 ☞A2 (White Balance) Always check & record S/W Version and White Replace Main B/D Re-enter White Balance value Balance value before replacing the Main B/D Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 40 Check various voltages Check and No Video/ Normal of Power B/D (Main) replace No audio voltage? (20V, 12V…) Main B/D Replace Power B/D or repair parts Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 41 1. Reconnection 2. Install Booster S/W Upgrade Contact with signal distributor Normal or broadcaster (Cable or Air) Picture? Normal Picture? Replace Main B/D Close Close Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 42 Replace Main B/D device and cable error normal Request repair for External device/Cable Check external External HDMI device and Replace Main B/D device/Cable error cable normal Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 43 Check normal operation of Screen B/D or Module Normal External Input(HDMI/DVI) by normal? error & T-CON B/D screen? connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 44: Power Error

    ☞A9 Measure voltage of each Normal? output of Power B/D Insert Power Normal Replace Main B/D Cord properly voltage? Replace Power B/D Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 45 Status is not Normal displayed) Replace Main B/D voltage? Check Power B/D voltage ※ Caution Check and fix exterior Replace Power B/D of Power B/D Part Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 46 POWER_OFF_BY_OLED_AM_MODE If the Module cable is disconnected, the micom is forced to power off TV. If still occurs , change Module & T-CON B/D Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 47 Power off for cool down the OLED t-con. (OLED) POWER_OFF_BY_EDID_WRITE Power off by EDID write done. Off when on, off while viewing, power auto on/off Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 48 Sound Test Check Sound out Setting Replace Power B/D and repair parts Check Speaker Replace Main B/D Disconnection disconnection or Sub B/D Replace Speaker Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 49 (In case of Connect and check Normal External Input other external audio? signal error) device Check and fix external device Check and fix external device Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 50 If R/C operate, Normal Close operating? Explain the customer cause is interference Normal from light in room. Replace Main B/D Voltage? Replace R/C Replace Power B/D Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 51 Replace MR18 Close Down load the Firmware * INSTART MENU12.RF •If you conduct the loop at 3times, Remocon Test Receiver change the MR18. Firmware download Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 52 Pin #1 Voltage? INSTART menu Main B/D ☞A14 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 53 Recognition error signal - S/W Version HDMI/ Check and fix DVI, Optical Replace Main B/D Fix in Recognition external device/cable accordance error with technical information Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 54 Moving SPK with New one. Moving SPK noise ※ Explain ‘Generated Sound’ part of Trouble shooting in the Owner’s Manual to the customer if needed. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 55 16/16 Zoom part with Module Replace Module exterior damage damage & T-CON B/D Remote control Replace remote control damage AIO Box Replace AIO Box damage Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 56 Examples of Symptom (Module) A-6/10 Module / Power Examples of Symptom (Module) A-7/10 Examples of Symptom (Module) A-810 Examples of Symptom (Module) A-9/10 Exchange Power B/D (PSU) A-10/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 57 Moving Speaker Error Alarm Fan or Over Heat mode alarm How to use the Service remote control A15-A17 E. Etc Check items after Main B/D replacement Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 58 Check a voltage of R7632 after turn on the TV. If the voltage is low, Vx1 is locked.(OK) If the voltage is high(3.3V), BDP issue.(NG) No video/ Normal audio Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 59 3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-enter the value after replacing the MAIN B/D. No video/ Normal audio Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 60 All Settings  Programmes  Programme Tuning & setting When the signal is strong, use the  Manual Tuning  Antenna DTV attenuator (-10dB, -15dB, -20dB etc.) Picture broken/ Freezing Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 61 Checking method for remote control for adjustment Version No video/ Normal audio Picture broken/ Freezing Press the IN-START with the remote control for adjustment MR18 operating checking Wifi operating checking Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 62 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each voltage from power supply, finally replace the MainB/D. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 63 OLED TV residual image, light spot Content Page No Connection diagram As the part connecting to the external input, check the screen condition by signal Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 64 Check the contact condition of the Link Cable, especially dust or mis-insertion. Color Error Vertical / Horizontal bar, residual image, light spot, external device color error Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 65 CABLE Screen darkness disconnection of the FFC cable pin. G color transient due to poor FFC cable CABLE G Color Excessive connection A - 1/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 66 LVDS cable connection problem CABLE Color spread LVDS cable connection problem Due to foreign substance withi nLVDS CABLE Screen stop cable PIN A - 2/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 67 Main IC problem Main Dark picture Dark left-side screen Top/bottom screen part Main Broken picture Picture problem due to tuner Inner side quality problem A - 3/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 68 Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen A - 4/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 69 Screen picture spread problem Screen problem No problem at the initial stage. Right-side picture Main During Heat run, right-side picture problem problem A - 5/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 70 Source Driver issue Module White dot White dot cause by panel issue Module Line Dim Vertical Line cause by source drive IC A - 6/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 71 Horizon line Module has damaged Module has damaged Module Line Defect Un-repairable Cases Module Press damage In this case please exchange the Module A - 7/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 72 In this case please exchange the Module difference Compensation error when Power On/off Module Green light Color difference between screen cause by Module Color difference compensation error A - 8/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 73 Module has damaged Module No image (Can’t fix it) Burnt Module Burnt (Can’t fix it) Screen Mura Module Mura (Can’t fix it) A - 9/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 74 Appendix : Exchange Power B/D (PSU) No Light No picture/Sound Ok A – 10/10 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 75 B. Power error _No power symptom date OLED TV Content Check front display Logo Page No ST-BY condition: On or Off Power ON condition: Turn Off No power Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 76 No video/ Normal audio No video/ No audio No power Off when on, Remote control off while viewing & Local switch checking power auto on/off Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 77 1. Press the IN-START button of the remote control for adjustment 2. Check the entry into adjustment item 3 (Power On/Off Status) Off when on, off while viewing, power auto on/off Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 78: Checking Method

    1. Press the Setting button on the remote control. 2. Select the Sound function of the Menu. 3. Select the Sound Out. 4. Select Internal TV Speaker. No audio/ Normal video Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 79 Connect the tester RX1 to the speaker terminal and if you hear the “Chik Chik” sound when you touch the GND and output terminal, the speaker is normal. No audio/ Normal video Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 80 Check IR cable condition between IR & Main B/D. GREEN Check the st-by 3.5V on the terminal 8 on P4000 EYE_SCL 14 EYE_SDA N.C. N.C. Remote control & Local switch checking Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 81 Check WIFI Combo cable condition between WIFI Combo Assy & Main B/D. Check the 3.5V_WIFI P4006 on the terminal 1 & 6 MR18 operating checking Wifi operating checking Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 82 Standard Repair Process Detail Technical Manual Error Established E. ETC symptom date OLED TV Content Page No How to use the Service remote control How to access the remote control Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 83 Digital EYE function ON/OFF For some Model, access to the Test Pattern TILT Used for screen tilting change (Access to the old PDP control mode) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 84 Connects to external input 1,2,3 COMP1,2 (Added function) Connects to Component 1,2 HDMI1,2,3,4 Connects to HDMI 1,2,3,4 (Add function) DVI (Add function) Connects to DVI Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 85 - Record the R, G, B (GAIN, Cut) value of the color temperature before main B/D replacement. After replacing the main B/D, key in the recorded value. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 86 2. Residual image 3. Module error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of Module or Main-B/D!) Vertical / Horizontal bar, residual image, light spot, external device color error Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 87 Checking order 1. Check LED Color  Orange 2. Unplug the power cord 3. Reconnect Cable to AV Box(or Extension Cable) 4. Plug the power cord Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 88 2. Check MOTOR 24V (Q10101 or L10102) 3. Check Door 12V (L5104) 4. Check DET SW broken or not. 5. Check Motor 6. Replace each part or Cover Top Assy. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 89 Checking order 1. Check LED color  Blue 2. Check FAN Stauts (Poweronly mode or Instart > OLED) Temp. Sensor 3. Replace FAN or Temperature Sensor. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 90 Smart JIG Power Diagnosis Muitl Gender Guide (P/N : RAD32507801) (P/N : RAD33187801) A 23 (1/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

  • Page 91: Main Board

    24 Marking Check UK74,UK75 28Pin 28Pin 12Pin 12Pin 28Pin UK77,UK78 Cable Connection SK79 Includes 49UJ63 SM80/SM86 16/18Y/19Y 16Y/17Y 17Y/18Y 16Y/17Y/18Y/19Y (UH) (UH/SJ) (SJ/UJ/UK/SK) (UH/UK/UM A23 (2/19) (LH/LJ/LK/LM) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 92 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 A23 (3/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 93 “A: 2013 LCD POWER” 2014 ▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG. A23 (4/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 94 - 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 A23 (5/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 95 ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector A23 (6/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 96 ▶ 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. A23 (7/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 97 ▶ 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. A23 (8/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 98 ▶ 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 A23 (9/19) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 99 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A23 (10/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 100 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A23 (11/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 101 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A23 (12/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 102 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A23 (13/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 103 ▶ Connect the 18Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A23 (14/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 104 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A23 (15/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 105 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A23 (16/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 106 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board A23 (17/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 107 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A23 (18/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
  • Page 108 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A23 (19/19) can be judged as defective. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

This manual is also suitable for:

Oled77w9pva

Table of Contents