LG OLED83C3 Series Service Manual
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LG OLED83C3 Series Service Manual

LG OLED83C3 Series Service Manual

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OLED TV
SERVICE MANUAL
CHASSIS : E*31G
MODEL : OLED83C3***
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71991226 (2302-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 © 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.

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  • 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 SOFTWARE UPDATE ................12 BLOCK DIAGRAM ................. 14 EXPLODED VIEW .................. 15 WIRING DIAGRAM ................16 ASSEMBLY / DISASSEMBLY GUIDE ............ 17 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

    - Digital TV : DTMB (China/Hongkong), DVB-C (China) - Analogue TV : PAL D/K,I, NTSC-M (China/ Hongkong) 4) Philliphine - Digital TV : ISDB-T - Analogue TV : NTSC-M - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 7 * Hong Kong - 3780, 0.4/0.6, 4/16/64QAM, PN945, 720 ► DVB-C - Symbolrate : 4.0Msymbols/s to 7.2Msymbols/s - Modulation : 16QAM, 64-QAM, 128-QAM and 256-QAM - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 2 ~ 69 CATV 1 ~ 135 2 ~ 13 14 ~ 69 Colombia / Panama / Taiwan 2 ~ 69 CATV 1 ~ 125 - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 Optical Audio out Audio out HeadPhone(1EA) HeadPhone out USB Input (3EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Ethernet Connect (1EA) Ethernet Connect - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 UHD DEEP COLOUR ON When HDMI 4096*2160 134.86 59.94 593.407 UDTV 2160P UHD DEEP COLOUR ON When HDMI 4096*2160 135.00 60.00 UDTV 2160P UHD DEEP COLOUR ON - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 11 297.00 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 - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 (6) After finishing the update, it will show a pop-up below the picture. (7) Click “Yes” : Tv will be turn off and on itself - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 “The latest version of the SW is available for your TV. Do you want to update now” (3) [Yes] : update starts. [No] : Close the pop-up, check out later - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 14: Block Diagram

    BLOCK DIAGRAM - 14 - Copyright © LG Electronics Inc. All rights reserved. Only 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 training and service purposes.

  • Page 16: Wiring Diagram

    WIRING DIAGRAM Power Board Main Board SPEAKER SPEAKER WIFI - 16 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 (1) The back cover of the display can easily be removed by hand and screw driver. Remove screws and push mark outside, then disassemble back cover upside. Screw Latch (2) Remove a screw and disassemble Wifi assy. - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 (3) Remove all cable. (4) Remove Speakers & IR Bracket. - 18 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 (5) Remove 14 screws and disassemble PCB/PSU. Screw : 14ea (6) Remove 15 screws and disassemble 5 Brackets. Screw : 15ea - 19 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 20: Power Cord

    2. Power cord (1) A Power cord plugged into the back of the display can be removed after Back cover be removed . Attached type - 20 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 21: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 22 E. Noise Circuit noise, mechanical noise F. Exterior error Exterior defect First of all, Check whether there is SVC Bulletin in GSCS System for these model. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 23 ☞A2 & A4 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 24 Revised date 2/18 ☞A9 Check and No Video/ Check Power Board Normal replace No audio 20V,12V output voltage? MAIN B/D Replace Power Board and repair parts Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 25 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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 26 Replace Main B/D error cable normal Request repair for external device/cable Check external External HDMI device and Replace Main B/D device/Cable error cable normal Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 27 Replace (Check normal operation of screen? HDMI/ Screen Main /T-con External Input, Component, normal? RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 28: Power Error

    Measure voltage of each output of Power B/D Normal? Normal Replace Main B/D voltage? Normal Close Check Main ST-BY 7.8V voltage? ☞A9 Replace Power B/D Replace Power B/D Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 29 Normal Replace Main B/D Check Power B/D voltage? voltage ※ Caution Check and fix exterior Replace Power B/D of Power B/D Part Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 30 M0 ~ MF Wireless Model Wireless Model only Normal Code - N/A F0 ~ FF Factory/SVC Factory /SVC (ex. in-stop, Power Only, etc) Reserved Normal Code Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 31 Screen normal of Power Board voltage Speaker off Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 32 (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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 33: Function Error

    (Power B/D don’t have problem) If R/C operate, Normal Close operating? Explain the customer cause is interference from light in room. Replace R/C Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 34 5sec RF Receiver ver Close is “00.00”? Replace MR23 Close Replace MR23 * If you conduct the loop at 3times, change the MR23. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 35 Voltage? 1pin Main B/D INSTART menu ☞A14 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 36 Recognition error - 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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 37 In the Menu activation Connection Connection Network Connection Activation Close Close Replace Cable Replace Connection Voice Recognition Main B/D Ass’y Close Cable Close Re-Connection Close Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 38 18pin Main B/D INSTART menu ☞A17 Close Check & Repair Motion cable connection ☞A16 Check Motion Sensor ☞A16 MOTION Close “NG”? Change Motion Sensor Module Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 39 “Part related to nose” in the Owner’s then proceed as shown in the solution manual Manual. (For models without any fix information, provide the description) Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 40 Revised date 18/18 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote control Replace remote control damage Stand Replace stand dent Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 41 Exchange Main Board (1) ~ (3) A-3/10 ~ A-5/10 <Appendix> Exchange Module (1) ~ (4) A-6/10 ~ A-9/10 Exchange Power Board(PSU) A-10/10 Continue to the next page Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 42 How to use the Service remote control A18-A20 E. Etc Check items after Main B/D replacement F. Wi-Fi / RF How to Wi-Fi / RF checking method Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 43 Check the voltage of R7632 (Blue) while turning on TV power If the voltage is low, Vx1 is locked.(OK) Low (0V) : Normal, High (3.3V) : Burnt Detect Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 44 All settings  General  Programmes  Programme Tuning & settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 45 Revised Content Version checking method date 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 46 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 MAIN BOARD. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 47 Revised Content connection diagram date As the part connecting to the external input, check the screen condition by signal Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 48 A. Video error_Color error symptom date Revised Content Check Link Cable(VX1/EPI) reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 49 Screen darkness to disconnection of the FFC cable pin. G color transient due to poor FFC cable CABLE G Color Excessive connection A - 1/10 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 50 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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 51 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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 52 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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 53 Screen picture spread problem Screen problem No problem at the initial stage. Right-side Main During Heat run, right-side picture picture problem problem A - 5/10 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 54 Image broken Bright spot occur due to panel defect MODULE Bright Spot Horizontal Line dim occur & MODULE Line Dim Vertical Noise occur A - 6/10 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 55 MODULE Horizontal multiple band noise band MODULE Line defect Vertical Line defect occur MODULE Module damage Module damage caused by the module A - 7/10 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 56 Source PCB Defect defect Panel defect MODULE Vertical band MODULE Green lighting Abnormal light emission MODULE Color step noise The difference in color A - 8/10 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 57 (In this case, it can’t be repared. Replace Module) Picture Mura (In this case, it can’t be repared. Module Mura Replace Module) A - 9/10 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 58 Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 10/10 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 59 Established B. Power error _No power symptom date Revised Content Check front display LED date ST-BY condition: On or Off Power ON condition: Turn Off Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 60 AC INPUT 6. T-CON 12V Check : P202 - SET On : above 12V - SET St-by : 0V All condition meets, Power Board OK. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 61 1. Press the IN-START button of the remote control for adjustment. 2. Press the navigation key(Right) 3 2 Page times, entry into SVC menu 2 page. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 62: 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 TV Speaker. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 63 3. Connect the speaker terminal and if you hear the ‘Chik~ Chik~’ sound when you touch the GND and output terminal, the speaker is normal. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 64: Voice Recognition

    Checking order to check motion sensor Checking order 1. Check the cable connection between the main board and the IR PCBA. 2. Check Terminal no.18 Voltage => 3.5V Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 65 Checking order to check motion remote/wifi WOV_PDM_CLKOUT Checking order 1.Check BT/Wifi cable condition between BT/Wifi assy & Main board. 2.Check the Main 3.5V on the terminal 1 pin Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 66: Voice Recognition Settings

    Check Voice Recognition Function activation date 1. All Settings > General > AI Serivice 2. Voice Recognition Settings 3. User Agreements 4. Activation of Voice Recognition Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 67 Motion : YES is displayed on the Screen. Press Instart key On the instart screen, check the motion check item OK Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 68 Checking order to check motion sensor Checking order 1. Check the cable connection between the main board and the IR PCBA. 2. Check Terminal no.18 Voltage => 3.5V Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 69 Revised Content How to use the Service remote control date 1. How to access the remote control 1 page Press the button 3times. 2 page Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 70 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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 71 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 © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 72 If the TV Screen is a white pattern and the pop-up window does not appear when connecting USB. Press the “BACK" or “EXIT” on the remote controller for 3 seconds to switch to White noise screen. Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 73 Standard Repair Process Detail Technical Manual Error Established F. Wi-Fi / RF symptom date Revised Content How to Wi-Fi / RF checking method date Wifi / Magic Search 2 page Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 74 If the result comes out ‘NG’ for each part, make sure to check the connector check again between the part and the cable is properly connected. (Check if the cable connection is normal) 1 / 1 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 75 (Some models launched before 2017 may have 5V / 3.5V) 3. If the result comes out ’NG’, replace Power Board ● Note. 1 / 4 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 76 2. Check the output voltage of 20VS and 12VM 3. If the result comes out ’NG, check the voltage of PWR_ON ● Note. 2 / 4 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 77 3. If the result comes out ’NG, replace Main Board. If it comes out ‘OK’, replace Power B/D 4. The normal power supply from MAIN to POWER is 3V or higher ● PWR_ON Note. 3 / 4 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 78 2. If the result comes out ’NG, replace Power B/D. If it comes out ‘OK’, check if Main B/D and Module operate normally. Note. 4 / 4 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 79 Connect the T-Con ~ motherboard FFC cable to the Jig A jig for sending test patterns ※ SVC Part P/No : RAD33749101 Parts connecting Cable Appendix. 1 / 1 Copyright © 2023 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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