Download
Share
Print this page
LG OLED88Z2 Series Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. OLED TV
  5. OLED88Z2 Series
  6. Service manual
LG OLED88Z2 Series Service Manual

LG OLED88Z2 Series Service Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
OLED TV
SERVICE MANUAL
CHASSIS : E*21Z
MODEL : OLED88Z2***
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71902102 (2202-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 © 2022 LG Electronics Inc. All rights reserved. Only training and service purposes.

Advertisement

loading

Related Manuals for LG OLED88Z2 Series

Summary of Contents for LG OLED88Z2 Series

  • 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 ................13 BLOCK DIAGRAM ................. 15 EXPLODED VIEW .................. 17 ASSEMBLY / DISASSEMBLY GUIDE ........... 19 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

    - 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 for training and service purposes.
  • Page 7 3) NTSC M: VHF/UHF 2~78, Cable:1~71 4) DTMB:21~69 #6 Philippine 1) ISDB-T: UHF : 2~69 2) NTSC M: VHF/UHF : 2~69, CATV: 1~135 - 7 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 8 ▶ 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- - 8 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 9 *BS8K is only for 8K Models. CS Digital 000~999 (4K Models do not support BS8K Digital Channels.) BS4K/8K Digital 001~499 CS4K Digital 500~999 - 9 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 10 *Only 42/48C2 model & Japan all model USB Input (3EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Ethernet Connect (1EA) Ethernet Connect - 10 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 11 23.98 1188 7680*4320 1188 7680*4320 1188 7680*4320 131.87 29.97 1188 8K Model Only. 7680*4320 1188 7680*4320 2376 7680*4320 263.74 59.94 2376 7680*4320 2376 - 11 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 12 UHD DeepColor is On (UHD, 8K 120Hz models only), 2560*1440 182.99 119.99 497.7 Support only when UHD Deep- Color is On - 12 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 13 (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 - 13 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 14 “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 - 14 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 15: Block Diagram

    BLOCK DIAGRAM - 15 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 16 - 16 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 17: 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. - 17 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 18 EXPLODED VIEW(CABLE) - 18 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 19 When moving the set, do not hold the head part (red dotted line part) by hand, move it by holding the stand (green line part). When moving the set, Handling by more than 4 persons. * Refer to the picture below. - 19 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 20 (1-3) Unscrew Screw(A) 1EA for DC Cable Fixer, and disconnect the DC Cable. Stand Cable Cover Stand Cable Cover DC Cable Fixer DC Cable - 20 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 21 * The Sound Reflector is attached to the stand only by a magnet. Thus, Make sure that the Sound Reflector does not fall off to the floor when it is removed. Sound Reflector Sound Reflector - 21 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 22 (4-1) Lift the Head part and separate it from the Stand. The Shaft is fully released status. (※ The Shaft is not separated from the Stand) - 22 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 23 (5-2) Separate the Back Cover by lifting the bottom of the Back Cover. (Carefully separate the upper holder joints.) Back Cover inner holder joints - 23 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 24 (5-3) Back Cover disassembly completed. - 24 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 25 (6-2) Separate the Cable Fixer, Pass the DC Cable through the holes, and pull down. Stand Cable Cover Stand Cable Cover Cable Fixer - 25 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 26 (7-2) Separate the Power Box from Stand by pulling the DC Cable and the Power Code Cable. * Pull out gently while pulling the left and right simultaneously to avoid damage or missing the cable. Power Box - 26 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 27 Make sure that the Guide Pem-nut on the Power Box is inserted into the Stand inner Guide Rail. For normal assembly, the left and right sides must be inserted to the end at the same time. - 27 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 28 (8-1) Unscrew Screw(F) 12EA on top of Power Box and separate Power Box Top Cover. Power Box Top cover - 28 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 29 [Assembly Guide] (1-1) Cover the Power Box Top Cover and Screw the Screw(F) 12EA. Power Box Top cover - 29 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 30 * For normal assembly, the left and right sides must be inserted to the end at the same time. (2-2) Screw the Power Box Fixation Screw(E) 3EA on the back of the Stand. - 30 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 31 Tighten the cable fixer. (3-2) Tighten the Stand Cable Cover. (Vertical direction 1EA, Horizontal direction 1EA) Cable Fixer Stand Cable Cover Stand Cable Cover - 31 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 32 * When pressing the Latch part, Make sure that you hear a ‘Tap' sound and make a normal connection. (4-2) Screw the Back Cover Fixation Screw(D) 9EA. Back Cover inner holder joints - 32 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 33 Head. ※ T h e head of th e shaft does n ot protrude fr om th e stand surface. - 33 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 34 ※Check the DC Cable before assemble Reflector to Stand. Cable does not protrude Cable protrudes to the outside (NG) to the outside (OK) Sound Reflector - 34 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 35 (7-3) Assemble the Main Cover and the Power Cover. Matching color of Cable and Label DC Cable Fixer Fixing Cable Cable Fixer Stand Cable Cover Stand Cable Cover - 35 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 36 2. Lift Set and take it out – reverse order of assembly. 2. Lift and remove the Power Box – reverse order of assembly - 36 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 37: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 38 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 39 ☞A4 & A2 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 40 Check various voltages of Check and No Video/ Power Board Board (Main) Normal replace No audio (12V,20V) voltage? MAIN B/D Replace Power Board and repair parts Copyright © 2022 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 42 Replace Main/T-con B/D Component device/Cable cable error normal Request repair for external device/cable Check external External HDMI device and Replace Main/T-con B/D device/Cable error cable normal Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 43 (Check normal operation of screen? Replace Main HDMI/ Screen External Input, Component, B/D, Module normal? RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 44 Measure each output voltage of Power B/D ☞A9 Check Power Normal Normal? ST-BY 7.8V voltage? Normal Replace Main B/D voltage? Replace Power Close Replace Power B/D Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 45 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 46 Check & Change OLED Module Power off by resume fail when dc on case. POWER_OFF_BY_RESUME_FAIL Check & Change Main B/D If occur the resume fail, TV will be rebooted. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 47 POWER_OFF_BY_PNWASHDONE Power off by panel noise wash function completed. POWER_OFF_BY_COOLING Power off for cool down the OLED t-con. POWER_OFF_BY_EDID_WRITE Power off by EDID write done. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 48 Screen normal voltage or not Power Board Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Copyright © 2022 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 50 Replace Main B/D (Power B/D don’t have problem) If R/C operate, Normal Close Explain the customer operating? cause is interference from light in room. Replace R/C Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 51 Download the Firmware • If you conduct the loop at 3times, change the Magic remote control. Instart Menu → 12.RF Remote control Test → Receiver Firmware Download Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 52 Voltage? Instart menu Main B/D “NG”? ☞A14 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value is Close “NG”? Replace the Wifi assy Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 53 Recognitionerror - S/W Version HDMI/ Check and fix DVI, Optical Fix in Replace Main B/D Recognition external device/cable accordance error with technical information Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 54 Cable Make the Connect network function ‘on’ Close Close Change Voice Cable Connection Recognition Change Main B/D Is OK? Ass’y Close Re-connect Close Cable Close Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 55 “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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 56 Revised date 18/18 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote Replace remote control control damage Stand Replace stand dent Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 57 Defected Type caused by Cable / Main Board / Module Examples of Symptoms (Module) A-6~9/10 Examples of Symptoms (Power Board) A-10/10 Continue to the next page Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 58 Wifi/Motion remote operation checking method Voice Recognition operation checking method How to use the Service remote control A16~18 E. Etc Check items after Main B/D replacement Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 59 Revised Content Check Vx1 Lock date Check a voltage of R30326 when TV is on. Vx1 is OK if the voltage is 0V(Low). Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 60 2. Enter into White Balance. 3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 61 All settings  Programmes  Programme Tuning & settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 62 Revised Version checking method Content date 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 63 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 64 Revised Content Connection diagram date As the part connecting to the external input, check the screen condition by signal Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 65 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 66 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 67 VX1 cable connection problem CABLE Color spread VX1 cable connection problem Due to foreign substance withi nVx1 CABLE Screen stop cable PIN A - 2/10 Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 68 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 69 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 70 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 71 Source-driver issue MODULE Image broken White dot cause by panel issue MODULE White dot MODULE Line dim Vertical line cause by source-driver IC A - 6/10 Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 72 Horizontal line Module is damaged MODULE Line defect Module is damaged Un-repairable cases MODULE Press damage In this case please exchange the module A - 7/10 Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 73 In this case please exchange the module difference MODULE Green light Compensation error when power on/off Color difference between screen cause MODULE Color difference by compensation error A - 8/10 Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 74 Module is 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 75 Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 10/10 Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 76 Established B. Power error _No power symptom date Revised Content Check front Power Indicator date ST-BY condition: On or Off Power ON condition: Turn Off Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 77 B. Power error _No power symptom date Revised Check power input voltage and ST-BY 7.8V Content date Check a voltage of DC 12VM (ST-BY : 7.8V, Normal : 12V) Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 78 POWER OFF MODE checking method date Entry method 1. Press the IN-START button of the remote control for adjustment. 2. Check the entry into adjustment item 3. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 79 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 80 3. Connect the tester P20102 to the speaker terminal and if you hear the ‘Chik~ Chik~’ SPK_L-_TW sound when you touch the GND and output terminal, the speaker is normal. SPK_L+_TW Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 81 2. Check the standby 3.5V on the terminal (③). 3. AS checking the Pre-Amp(IR LED light), the power is in ON condition, an Analog Tester needle should move slowly, otherwise, it’s defective. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 82 Checking order to check motion remote/wifi Checking order 1. Check BT/Wifi cable condition between BT/Wifi assy & Main board. 2. Check the 3.5V_WIFI on the terminal 13, 19, 24 Pin. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 83 Voice Recognition operating checking method date 1. Menu > General > AI Service 2. Voice Recognition Help and Settings 3. Settings 4. Active ‘Use Hands-free Voice Control’ Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 84 Standard Repair Process Detail Technical Manual Error Established E. Etc symptom date Revised Content How to use the Service remote control date 1. How to access the remote control Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 85 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 86 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 © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 87 - Record the R, G, B (GAIN, Cut) value of the color temperature before main board replacement. After replacing the main board, key in the recorded value. Copyright © 2022 LG Electronics Inc. All rights reserved. Only for training and service purposes.

This manual is also suitable for:

Oled88z2psaOled88z2psa.aauylh