LG OLED77G7V Service Manual
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LG OLED77G7V Service Manual

LG OLED77G7V Service Manual

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OLED TV
SERVICE MANUAL
CHASSIS : ED71H
MODEL : OLED77G7V
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69867402 (1707-REV01)
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL
OLED77G7V-Z

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  • Page 1 OLED TV SERVICE MANUAL CHASSIS : ED71H MODEL : OLED77G7V OLED77G7V-Z CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL69867402 (1707-REV01) Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 2 SOFTWARE UPDATE ................10 BLOCK DIAGRAM ................... 11 EXPLODED VIEW .................. 19 ASSEMBLY / DISASSEMBLY GUIDE ........APPENDIX 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

    HELLASSAT 39.0E, HISPASAT 1CDE 30.0WHOTBIRD 13.0E, INTEL- SAT10&7 68.5E, INTELSAT15 85.2E, INTELSAT1R 50.0W, INTEL- SAT903 33.5W, INTELSAT904 60.0E, NILESAT 7.0W, NSS12 57.0E, THOR 0.8W, TURKSAT 42.0E, YAMAL201 90.0E, OTHER - 6 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 7 SPDIF out USB (3EA) EMF, For SVC (download) JPEG, MP3 Ethernet Connect (1EA) Ethernet Connect STP cable PCMCIA Card slot (1EA) PCMCIA slot - 7 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 8 When HDMI1,2,3 3840*2160 134.865 59.94 593.407 UDTV 2160P UHD DEEP COLOUR ON When HDMI1,2,3 3840*2160 135.00 60.00 594.00 UDTV 2160P UHD DEEP COLOUR ON - 8 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 9 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 54.00 24.00 297.00 UDTV 2160P - 9 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 10: Software Update

    (7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and Tool Option. - 10 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 11: Block Diagram

    BLOCK DIAGRAM 1. M16 Block Diagram - 11 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 12 2. Tuner + CI - 12 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 13: Video & Audio In/Out

    3. Video & Audio IN/OUT - 13 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 14 4. HDMI 2.0 - 14 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 15 5. USB / Wi-Fi / M-Remote / UART - 15 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 16: Power Block

    6. Power Block - 16 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 17 7. M16+ I2C Map - 17 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 18 8. Clock source and frequency inside chip - 18 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 19: 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. - 19 - Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 20: Disassembly Guide

    OLED77G7 SVC Manual - Disassembly Guide Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 21 (1-4) Unfasten screw 8EA at back side of [Cover Ass’y, Rear Center], and unfasten screw 8EA at bottom side of [Base, Metal]. (1-5) Move the [Moving Handle] 2EA from STAND TYPE to WALL TYPE. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 22 (2-1) Unfasten the [Moving handle] 2EA in the middle side of [Cover Ass’y, Rear Center]. (2-2) Unfasten Screw 5EA at the bottom side of [Cover Ass’y, Rear Center]. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 23 (You don’t need a Jig like ‘Plastic scraper for 65G6’ because it will be much easier for you to detach this part compared to 65G6.) (3-3) If you pulled up all bottom area of [Cover Ass’y, Rear Center], push it up with a little shaking. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 24 OLED77G7 Disassembly Guide (4-1) Unfasten Screw 8EA. (4-2) Disconnect Power Cable 3EA. (4-3) Disconnect VX1 Cable 2EA. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 25 (5-3) Pull with raising up the [AV BOX] like a picture to separate the hooks of [Hinge Ass’y]. (This process should be worked by two workers.) Separate Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 26 You need to check the arrow mark. If there are arrow marked screws, Do not unfasten that. Grille ※ Do not unfasten arrow marked screws Table Cotton sheet or Pad ※ Do not unfasten these screws Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 27 OLED77G7 Disassembly Guide (7-1) Turn the [AV BOX] like this guide. Turn the [AV Box] Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 28 OLED77G7 Disassembly Guide (8-1) ~ (8-4) Separate the inside latches of [Cover Ass’y, AV BOX] following the steps. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 29 (9-2) Do the same working at Opposite side to separate middle area of [Cover Ass’y, AV BOX]. You have to separate these inside latches. Latch separation Latch separation Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 30 OLED77G7 Disassembly Guide (10-1) ~ (10-2) Put the [Cover Ass’y, AV Box] up like the picture, and lay down on the table. 10-1 10-2 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 31 OLED77G7 Disassembly Guide (11-1) Disconnect a Power Cord. 11-1 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 32 (12-1) Unfasten Screw 6EA at [Hinge Ass’y]. (L/R each 3EA) (12-2) Unfasten Screw 6EA at [Cover, Hinge Front]. 12-1 12-1 12-1 12-1 12-2 12-2 12-2 12-2 12-2 12-1 12-2 12-1 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 33 (13-3) Separate the [Cover Ass’y, Hinge Cable] and then put down it on the table. (※ If you change these cables, refer to the extra guide at final pages.) 13-1 13-2 13-3 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 34 (14-1) ~ (14-4) Disconnect and separate [Woofer Speakers] and [Front Speakers]. Front Speaker Woofer Speaker Front Speaker Woofer Speaker 14-2 14-3 14-1 14-4 14-1 14-2 14-4 14-3 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 35 (15-2) Unfasten the Screw 6EA from [Main PCB] and Disconnect indicated connectors. Main PCB Sub PCB 15-2 15-1 15-2 15-2 15-2 15-1 15-1 15-2 15-1 15-2 15-2 15-1 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 36 When you separate the PCB, you need a little power because gap pads were stuck at the bottom of PCB. 16-1 16-2 16-3 ※ you need a little power because gap pads were stuck at the bottom of PCB. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 37 (17-4) Unfasten [Fan] Screw 2EA. PSU Slave PSU Mater 17-1 17-1 17-2 17-2 17-1 17-2 17-2 17-1 17-1 17-1 17-1 17-2 17-2 17-2 17-3 17-4 17-1 Thermal PCB Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 38 OLED77G7 Disassembly Guide (18-1) Disassemble the [Bracket Ass’y, Locking] from Module. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 39 MCQ68769225 ④ COMPLEX ETC. ACRYL THERMAL PAD MCQ68366810 DAMPER ⑤ NOT USE (MCQ68366810)DAMPER COMPLEX ETC. ACRYL THERMAL PAD Attach to the mark ☞ Disassembly Complete Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 40 OLED77G7 SVC Manual - Re-assembly Guide Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 41 CUTTING SILICON ETC. SILICON G MCQ68769225 ④ COMPLEX ETC. ACRYL THERMAL PAD MCQ68366810 DAMPER ⑤ NOT USE (MCQ68366810)DAMPER COMPLEX ETC. ACRYL THERMAL PAD Attach to the mark Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 42 (2-3) Fasten the [Thermal PCB] Screw 1EA. (2-4) Fasten the [Fan] Screw 2EA. (Screw Type Caution) PSU Slave PSU Mater M4 Screw 1EA Thermal PCB Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 43 OLED77G7 Re-assembly Guide (3-1) ~ (3-2) put down the [Main PCB] in place with inserting the Tuner. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 44 (4-1) Put down [Sub PCB] and Fasten it with Screw 4EA, and then connect the connectors. (4-2) Fasten the [Main PCB] Screw 6EA and Connect the indicated connectors. Main PCB Sub PCB Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 45 (5-1) ~ (5-4) Insert the Connector of [Woofer & Front Speaker] and then put it down in place. Front Speaker Woofer Speaker Front Speaker Woofer Speaker Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 46 (6-1) Connect the Power Cable Connector 3EA from the Bottom of [Cover Ass’y, Hinge Cable]. (6-2) Connect the VX1 Cable Connector 2EA from the Bottom of [Cover Ass’y, Hinge Cable]. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 47 OLED77G7 Re-assembly Guide (7-1) Fasten the Screw 3EA at each part of [Hinge Ass’y] L/R. (Total 6EA) (7-2) Fasten the Screw 6EA at [Cover, Hinge front]. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 48 OLED77G7 Re-assembly Guide (8-1) Connect a Power Cord. (8-2) Arrange the Cable in rib shapes at [Bracket, AV Bottom]. (Refer to the Picture) Arrange like this Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 49 (9-2) Take out the VX1 Cable 2EA from Bottom Box to upside passing the hole. (9-3) Arrange and assemble the [Cover Ass’y, AV Box] to Bottom Box. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 50 (10-1) ~ (10-5) Cover and Push evenly [Cover Ass’y, AV Box] with checking assembly status. (10-6) Check latches indicated the picture whether it is assembled well or not. 10-1 10-2 10-3 10-4 10-5 10-6 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 51 Cotton sheet or Pad 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 11-2 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 52 [Extra Guide] Working Guide to replace a Module. Remove the protection film for Module. MODULE Front surface MODULE Rear surface Remove the protection film for Module. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 53 At this time, be careful the crash between [AV Box] and [Glass]. (This process should be worked by two workers.) (12-2) Hook the 4EA Springs from Locking Bracket Ass’y to Rail Guide bracket (White color). Landing 12-1 12-2 12-2 12-2 12-2 Insert Caution! Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 54 (13-2) Connect the Power Cable 3EA. (13-3) Connect the VX1 Cable 2EA. 13-3 13-2 13-3 13-2 13-1 13-1 13-2 13-1 13-1 13-1 13-1 13-1 13-1 13-2 13-3 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 55 (14-2) Fasten [Moving Handle] 2EA at the center of [Cover Ass’y, Rear Center]. (14-3) Fasten the Screw 5EA at the bottom of [Cover Ass’y, Rear Center]. 14-1 14-2 14-2 14-2 14-3 14-3 14-3 14-3 14-3 14-3 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 56 (15-6) Make the TV SET stand up by two or more people. (15-7) Re-assembly Complete. 15-1 15-2 15-3 15-4 15-5 15-6 15-7 ☞ Re-assembly Complete Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 57 ※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide (a-1) Unfasten Screw 2EA at [Hinge Ass’y] L/R (a-2) Unfasten Screw 4EA at [Hinge Cable Cover Front & Rear] Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 58 ※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide (b-1) ~(b-3) Holding each surface of [Hinge Cable Cover Front & Rear], Separate Latches in both Parts sequentially like below pictures. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 59 ※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide (c-1)~(c-2) Separate the Cables from [Cover, Hinge Cable Rear].  Disassembly Complete. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 60 (d-1) VX1 Cable Connectors attached label should be facing down. (d-2) Arrange the Cables like below picture. You have to keep the point which are gathered by taping and follow the cable management guide. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 61 ※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide (e-1) Gather the taping point of Power Cable 3EA (e-2) Refer to the Cabld length in the pictures to arrange the cables. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 62 ※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide (f-1) Assemble the Latch structures between [Cover, Hinge Cable Rear & Front]. (f-2) Fasten Screw 4EA. (Torque 3~4 kgf ) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 63 ※Extra Guide : OLED77G7 Hinge Cable Cover Assy Disassembly/Re-assembly Guide (g-1) Put down [Hinge Ass’y] L/R like below picture and fasten Screw 2EA. (Torque 3~4 kgf ) (g-2) Re-assembly Complete. ☞ Disassembly/Re-assembly Complete. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 64: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 65 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 66 ☞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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 67 Check various voltages Check and of Power Board (Main) Normal No Video/ replace voltage? No audio (20V, 12V…) MAIN B/D Replace Power Board and repair parts Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 68 1. Reconnection 2. Install Booster S/W Upgrade Normal Contact with signal distributor Picture? or broadcaster (Cable or Air) Normal Picture? Replace Main B/D Close Close Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 69 /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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 70 (Check normal operation of HDMI/ Main B/D / normal? External Input, Component, Module RGB and HDMI/DVI by Normal connecting Jig, pattern screen? Generator ,Set-top Box etc. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 71: Power Error

    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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 72 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 73 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 74 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 75 (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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 76: Function Error

    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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 77 Replace MR15RA Close Down load the Firmware •If you conduct the loop at 3times, * INSTART MENU12.RF change the MR15RA. Remocon Test Receiver Firmware download Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 78 INSTART menu Voltage? 1pin Main B/D ☞A14 Check & Repair Close Wifi cable connection ☞A4 Wi-Fi Mac value Close is “NG”? Change the Wifi assy Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 79 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 80 “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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 81 Revised date Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote control Replace remote control damage Stand Replace stand dent Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 82 Exchange Main Board (2) A-4/6 Defected Type caused by Cable/ Main / Power / Module Exchange Main Board (3) A-5/6 Exchange Power Board (PSU) A-6/6 Exchange Module A-7/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 83 E. Etc Check items after Main B/D replacement E. Etc Adjustment Test pattern How to use JIG E. Etc (Power B/D Diganostic Smart Jig Multi Gender) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 84 Check Vx1 lock date R7624 : 0[V] Check a voltage of R7624 after turn on the TV. If the voltage is low, Vx1 is locked.(OK) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 85 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 86 TUNER input signal strength checking method date All Settings  Channels  Channel Tuning  Manual Tuning When the signal is strong, use the attenuator (-10dB, - 15dB, -20dB etc.) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 87 Content OLED TV Version checking method date 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 88 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 89 Revised Content OLED TV Connection diagram date As the part connecting to the external input, check the screen condition by signal Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 90 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 91 Screen darkness to disconnection of the FFC cable pin. G color transient due to poor FFC cable CABLE G Color Excessive connection A - 1/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 92 LVDS cable connection problem CABLE Color spread LVDS cable connection problem Due to foreign substance withi nLVDS CABLE Screen stop cable PIN A - 2/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 93 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 - 3/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 94 Screen spread Screen corner appears blurry Main Color Spread Color spread on the screen Main Blurry Screen Blurry picture on the screen A - 4/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 95 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 - 5/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 96 Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 6/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 97 Image broken Bright Dot Verical line defect Image stain Horizontal defect and Verical stain Noise Horizontal line Multi Verical line Defect Screen darkness A - 7/7 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 98 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 99 Content date Check the DC 12VM line for ST-BY Voltage (ST-BY : 7.8V, Normal : 12V) Power To Main B’d P202 Power To Module P201 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 100 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 101: 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 102 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 103 2. Check the standby 3.5V on the terminal 22 pin (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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 104 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 on the terminal 6 Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 105 Standard Repair Process Detail Technical Manual Error E.Etc Established symptom date Revised Content How to use the Service remote control date 1. How to access the remote control Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 106 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 107 Connects to external input 1,2,3 COMP1,2 (Added Connects to Component 1,2 function) HDMI1,2,3,4 Connects to HDMI 1,2,3,4 (Add function) DVI (Add function) Connects to DVI Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 108 - 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 109 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 © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 110 Smart JIG Power Diagnosis Muitl Gender Guide (P/N : RAD32507801) (P/N : RAD33187801) A 20 (1/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

  • Page 111: Main Board

    24Pin 28Pin (OLED) 24Pin 28Pin 16Y/17Y (UH/UJ) 18Pin 28Pin 28Pin 12Pin 12Pin 28Pin Includes 49UJ63 16Y/17Y 16Y/17Y (SJ/UJ) A 20 (2/19) (UH) (UH) (UH/SJ) (LH/LJ) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 112 OLED ‘16 UH95/UH96 UH85/UH93 UH77/UH87 UH75/UH76 UH65/UH68 LH68, LH66, LH60,LH54 ‘17 OLED SJ95/UJ98 SJ85/UJ94 SJ80, UJ77 UJ75/UJ78 ’17 UJ65/UJ68 UJ63/UJ67 LJ61/LJ68 LJ55/LJ58 A 20 (3/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 113 “A: 2013 LCD POWER” 2014 ▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG. A 20 (4/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 114 - 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 A 20 (5/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 115 ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector A 20 (6/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 116 ▶ 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. A 20 (7/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 117 ▶ 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. A 20 (8/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 118 ▶ 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 A 20 (9/19) Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 119 Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A 20 (10/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 120 Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A 20 (11/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 121 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A 20 (12/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 122 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A 20 (13/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 123 Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A 20 (14/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 124 Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A 20 (15/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 125 Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A 20 (16/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 126 Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board A 20 (17/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 127 Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A 20 (18/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.
  • Page 128 Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A 20 (19/19) can be judged as defective. Copyright © 2017 LG Electronics. Inc. All rights reserved. Only for training and service purposes.

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