LG OLED88Z9PTA Service Manual

Chassis eb91z

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OLED TV

SERVICE MANUAL

CHASSIS : EB91Z

MODEL : OLED88Z9PTA

CAUTION

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

P/NO : MFL70442907 (1908-REV00)

CONFIDENTIAL

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Summary of Contents for LG OLED88Z9PTA

Page 1 OLED TV SERVICE MANUAL CHASSIS : EB91Z MODEL : OLED88Z9PTA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL70442907 (1908-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 .................. 14 DISASSEMBLY GUIDE................16 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 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
DVB-S (QPSK) : 2 ~ 45Msymbol/s - Viterbi DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8 DVB-S2 mode: 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10 - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 7 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 14: 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. - 14 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 15 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 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. - 16 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 17 (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 - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 18 * The Shaft(C) is not completely separated from the Stand. (The Shaft(C) is fixed to the Stand by washer.) The Shaft is fully released status. (※ The Shaft is not separated from the Stand) - 18 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 19 (5-2) Separate the Back Cover by lifting the bottom of the Back Cover. (Carefully separate the upper holder joints.) (5-3) Back Cover disassembly completed. Back Cover inner holder joints - 19 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 20 (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 - 20 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 21 For normal assembly, the left and right sides must be inserted to the end at the same time. (8-1) Unscrew Screw(F) 12 EA on top of Power Box and separate Power Box Top Cover. Power Box Top cover - 21 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 22 * 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) 3 EA on the back of the Stand. - 22 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 23 * 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) 9 EA. Back Cover inner holder joints - 23 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 24 ※Check the DC Cable before assemble Reflector to Stand. Sound Reflector Cable does not protrude Cable protrudes to the outside (NG) to the outside (OK) Reflector attached by magnet. Sound Reflector - 24 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 25 (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 - 25 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 27 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 28 ☞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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 29 ☞A9 Check various Check and No Video/ Normal voltages of Power replace No audio voltage? Board (12V…) MAIN B/D Replace Power Board and repair parts Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 30 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 31 Replace Main/T-con B/D error cable 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 32 (Check normal operation of screen? HDMI/ Screen Replace External Input, Component, Main /T-con normal? RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 33: Power Error
Measure voltage of each output of Power B/D Normal? Normal Replace Main B/D voltage? Normal Close Check ST-BY 3.5V voltage? ☞A9 Replace Power B/D Replace Power Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 34 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 35 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 36 Power Board Screen normal voltage Speaker off Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 37 (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 38: Function Error
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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 39 Replace MR15 Close Down load the Firmware * If you conduct the loop at 3times, change the M4. * INSTART MENU14.RF Remocon Test3. Firmware download Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 40 Voltage? +3.5V_WiFi INSTART menu Main B/D ☞A15 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 41 Recognition error - S/W Version HDMI/ Check and fix Fix in DVI, Optical Replace Main B/D external device/cable accordance Recognition error with technical information Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 42 “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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 43 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 44 Exchange Module (1) ~ (3) A-6/11 ~ 8/11 Module Exchange T-Con (1) ~ (2) A-9/11 ~ 10/11 Exchange Power Board(PSU) A-11/11 Continue to the next page Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 45 Remote control operation checking method D. Function error Magic Remote/WiFi operation checking method How to use the Service remote control A16-A18 E. Etc Check items after Main B/D replacement Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 46 If Voltage is Low(0V), Vx1 is ‘OK’. When you turn TV, Voltage check on R7632 (Blue) Low (0V) : OK, High (3.3V) : Burnt Detect Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 47 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 48  All settings  Programmes Programme Tuning & settings  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 49 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 50 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 51 Revised Content connection diagram date 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 52 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 53 Screen darkness to disconnection of the FFC cable pin. G color transient due to poor FFC cable CABLE G Color Excessive connection A - 1/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 54 LVDS cable connection problem CABLE Color spread LVDS cable connection problem Due to foreign substance withi nLVDS CABLE Screen stop cable PIN A - 2/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 55 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 - 3/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 56 Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen A - 4/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 57 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 - 5/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 58 BLU internal foreign matter inflow MODULE Internal matter 6 block image broken MODULE Image broken MODULE Image broken Screen sync signal broken A - 6/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 59 BLU Vertical spreading on cube screen in no MODULE Vertical smear signal MODULE Over color Screen contour part brightly Over color A - 7/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 60 Center of the screen 1 block dark MODULE Screen darkness MODULE Vertical bar Center Vertical Bar Darkness at the MODULE bottom of the MODULE internal BLU breakage screen A - 8/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 62 The entire screen is dark and bit noise T-CON Image Broken occurs The entire screen is dark and bit noise T-CON Image Broken occurs A - 10/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 63 Appendix : Exchange Power Board (PSU) #11 Check parts by symptom No Light No picture/Sound Ok A - 11/11 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 64 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 65 Check power input voltage and ST-BY Content date Power Box To Check DC 12VM Line Main/Module B’d (ST-BY : 7.8V, Normal : 12V) P2201 P2202 Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 66 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 67: 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 68 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 69 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. 3.5V_WiIFI Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 70 SUME_JACK 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 1 pin. Copyright © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 71 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 72 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 73 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 74 - 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 © 2019 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

LG OLED88Z9PTA Service Manual

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Summary of Contents for LG OLED88Z9PTA

Page 3: Safety Precautions

Page 4: Servicing Precautions

Page 6: Specification

Page 11: Block Diagram

Page 14: Exploded View

Page 26: Troubleshooting Guide

Page 33: Power Error

Page 38: Function Error

Page 67: Checking Method

LG OLED88Z9PTA Service Manual

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Summary of Contents for LG OLED88Z9PTA

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