LG OLED55E8PUA Service Manual

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OLED TV

SERVICE MANUAL

CHASSIS : EA81E

MODEL : OLED55E8PUA

CAUTION

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

P/NO : MFL70444205 (1804-REV01)

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.

CONFIDENTIAL

Table of Contents

Summary of Contents for LG OLED55E8PUA

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 SPECIFICATION ..................6 SOFTWARE UPDATE ................9 BLOCK DIAGRAM ................. 10 EXPLODED VIEW .................. 16 DISASSEMBLY GUIDE ................17 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 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: Application Range
Rear (1EA), USB Input(3EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD B, C, E : Side(1EA), Rear(2EA) W : Rear(3EA) - 6 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 7 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 23.97 296.70 UDTV 2160P 4096*2160 UDTV 2160P - 7 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 8 UDTV 2160P 4096*2160 112.5 50.00 UDTV 2160P When HDMI1,2,3/4 UHD DEEP COLOUR ON 4096*2160 134.86 59.94 593.40 UDTV 2160P 4096*2160 60.00 UDTV 2160P - 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 16: 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. - 16 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 17: Disassembly Guide
* Put hand on the marked area( ), separate the back cover to the top. Screw : 5ea Holder and Latch : 11ea - 17 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 20 5. Remove all sort of cable. 6. Disassemble Screw(2points) and speaker. Screw : 2ea Remove Speaker - 20 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 21 7. Remove screw 16ea, disassemble T-con, Main PCB and PSU. Screw : 12ea 8. Remove T-con Cable. Cable : 4ea - 21 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 22 9. Remove Tape and Screw(5points), Disassemble Module and Glass Ass’y (Assemble with Magnetic , top/L/R). EMI Tape : 2ea Screw : 5EA 10. Module / Glass Disassemble Complete. - 22 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 24 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 25 ☞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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 26 Check various voltages Check and of Power Board (Main) Normal No Video/ replace No audio voltage? (20V, 12V…) MAIN B/D Replace Power Board and repair parts Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 27 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 28 /Cable device and error normal cable Request repair for external device/cable Check external External device HDMI device and Replace Main B/D /Cable error cable normal Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 29 (Check normal operation of HDMI/ Main B/D / External Input, Component, normal? Module RGB and HDMI/DVI by Normal connecting Jig, pattern screen? Generator ,Set-top Box etc. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 30 Measure voltage of each output of Power B/D Normal? Normal Replace Main B/D voltage? Close Normal Check ST-BY (7.8V) voltage? ☞A9 Replace Power B/D Replace Power Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 31 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 32 Reboot by SW down load function UNKNOWN No meaning (same as initial value) COMP_END OLED threshold voltage degradation(Compensation) completes. PNWASHDONE Power off by panel noise wash function complited. (OLED) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 33 20V of Power Screen normal voltage Speaker off Board Cancel OFF Replace Power Board and repair parts Check Replace MAIN Board Disconnection Speaker disconnection connecting Speaker Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 34 (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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 35 Replace Main B/D (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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 36 Replace MR18 Close Down load the Firmware •If you conduct the loop at 3times, * INSTART MENU12.RF Remocon Test Receiver change the MR18. Firmware download Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 37 INSTART menu Voltage? 1pin Main B/D ☞A14 Close Check & Repair Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 38 Recognition error signal - S/W Version HDMI/ Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 40 Revised date 16/16 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote control Replace remote control damage Stand Replace stand dent Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 41 Exchange Main Board (2) A-2/5 <Appendix> Exchange Power Board (PSU) A-3/5 Defected Type caused by T-Con/ Power / Module Exchange Module (1) A-4/5 Exchange Module (2) A-5/5 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 42 How to use the Service remote control A15-A17 Check items after Main B/D replacement E. Etc Adjustment Test pattern How to use JIG (Power B/D Diagnostic Smart Jig Multi Gender) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 43 Check Vx1 lock Content date R7624 : 0[V] Check a voltage of R7624 after turn on the TV. If the voltage is low, Vx1 is locked.(OK) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 44 2. Enter into White Balance of item 12. 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 45 When the signal is strong, use the All Settings  Programmes  Programme Tuning & setting attenuator (-10dB, -15dB, -20dB etc.)  Manual Tuning  Antenna DTV Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 46 OLED TV 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 47 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 48 Revised Content OLED TV Connection diagram date As the part connecting to the external input, check the screen condition by signal Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 49 A. Video error_Color error symptom date Revised Content Check Link Cable (Vx1) reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 50 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 51 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 52 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 53 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 54 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 55 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 56 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 57 In this case please exchange the module difference Compensation error when Power On/off Module Green light Color difference between screen cause Module Color difference by compensation error A - 8/10 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 58 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 60 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 61 Content date Power To Main B’d Check the DC 12VT line for ST-BY Voltage (ST-BY : 7.8V, Normal : 12V) P201 P251 Power To Module Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 62 Entry method 1. Press the IN-START button of the remote control for adjustment 2. Check the entry into adjustment item 3 (Power On/Off Status) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 63 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 64 ③ 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. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 65 3. AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester 3.5V_WiIFI needle should move slowly, otherwise, it’s defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 66 Checking order to check motion remote/wifi Checking order WIFI_DM 1.Check BT/Wifi cable condition between BT/Wifi assy & Main board. 3.5V_WiIFI 2.Check the 3.5V on the terminal 19 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 67 Standard Repair Process Detail Technical Manual Error Established D. Function error symptom date Revised Content How to use the Service remote control date 1. How to access the remote control Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 68 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 69 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 70 - 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 © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 71 You can view 11 types of patterns using the CH+ or - key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/D!) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.A...
Page 72 Smart JIG Power Diagnosis Muitl Gender Guide (P/N : RAD32507801) (P/N : RAD33187801) A20 (1/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 73: Main Board
24 Marking Check UK74 28Pin 28Pin 12Pin 12Pin 28Pin UK75 Cable Connection UK78 Includes 49UJ63 SK79 17Y/18Y 16/18Y 16Y/17Y 16Y/17Y/18Y (SJ/UJ/UK/SK) A20 (2/19) (UH) (UH/UK) (UH/SJ) (LH/LJ/LK) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 74 SJ95/UJ98 SJ85/UJ94 SJ80, UJ77 UJ75/UJ78 ’17 UJ65/UJ68 UJ63/UJ67 LJ61/LJ68 LJ55/LJ58 SK80/SK85/SK95 UK78/UK75/SK79 ‘18 UK63/UK64/UK65/UK7050 32LK61/62, 43/49LK61 B8, C8, E8 ‘18 OLED G8, W8 A20 (3/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 75 “A: 2013 LCD POWER” 2014 ▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG. A20 (4/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 76 - 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 A20 (5/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 77 ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector A20 (6/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 78 ▶ 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. A20 (7/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 79 ▶ 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. A20 (8/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 80 ▶ 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 A20 (9/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 81 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A20 (10/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 82 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A20 (11/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 83 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A20 (12/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 84 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A20 (13/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 85 ▶ Connect the 18Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A20 (14/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 86 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A20 (15/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 87 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A20 (16/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 88 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board A20 (17/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 89 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A20 (18/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Page 90 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A20 (19/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

LG OLED55E8PUA Service Manual

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Summary of Contents for LG OLED55E8PUA

Page 3: Safety Precautions

Page 4: Servicing Precautions

Page 6: Application Range

Page 9: Software Update

Page 10: Block Diagram

Page 12: Video & Audio In/Out

Page 16: Exploded View

Page 17: Disassembly Guide

Page 23: Troubleshooting Guide

Page 73: Main Board

LG OLED55E8PUA Service Manual

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