LG 65SK9000PUA Service Manual
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LG 65SK9000PUA Service Manual

Chassis : ua82h
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LED TV
SERVICE MANUAL
CHASSIS : UA82H
MODEL : 65SK9000PUA
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL70500903 (1803-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.
Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
65SK8550PUA
CONFIDENTIAL

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Summary of Contents for LG 65SK9000PUA

  • 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 .................. 18 ASSEMBLY / DISASSEMBLY ..............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: Application Range

    EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD Side(2EA), Rear(1EA) for SK99, SK96, SK95, SK90, SK85 Side(1EA), Rear(2EA) for SK89, SK80 - 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 8 296.70 UDTV 2160P 4096*2160 67.5 30.00 UDTV 2160P 4096*2160 112.5 50.00 UDTV 2160P 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 10: Block Diagram

    BLOCK DIAGRAM 1. Main IC - 10 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 11 2. I2C - 11 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 12 3. Power - 12 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 13 4. Tuner - 13 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 14: Audio Out

    5. Audio Out AMP_MUTE SIDE_HP_MUTE - 14 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 15 6. HDMI CEC_REMOTE - 15 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 16 7. USB / WIFI / M-REMOTE / UART - 16 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 17 8.EPI 68Pin Interface - 17 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 18: 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. - 18 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 19 (1) Lay the TV Set on a flat Pad and Remove the stand screw 4ea. SK85 SK95 After separate stand cover, Remove the stand screw 4ea. - 19 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 20 65SK85/95 Screw 6 Point 49SK85 Latch 14 Point 49SK85 Screw 5 Point Plate Spring B/C assembly structure = Module (Plate Spring) + BackCover (Latch) - 20 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 21 (Separate the B/C from bottom to top direction) * If push with strong force from left side, Side Latch will break. Handle L <4-2> <4-1> - 21 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 22 (Separate the B/C from bottom to top direction) * If push with strong force from right side , Side Latch will break. Handle R <5-3> <5-2> <5-1> - 22 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 23 (7) With one hand, Pushing the B/C in the upward direction and at the same time, With the other hand tap the left bottom of the B/C 2 or 3 times in the upward direction. - 23 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 24 * If Push the bottom of the B/C upwards with a strong force, Top Latch may break. (9) Supports the bottom of the B/C center. - 24 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 25 (10) Remove the B/C. - 25 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 26 65SK85/95 Latch 18 Point 55SK85/95 49SK85 Latch 16 Point Latch 14 Point (2) Check whether gap occurs in the Top/left side/right side of the B/C - 26 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 27 (For 65”, After assemble the Power Cord Bracket, assemble the 1ea Screw) 65SK85/95 65SK85/95 Screw 6 Point 55SK85/95 55SK85/95 Screw 5 Point 49SK85 49SK85 Screw 5 Point - 27 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 28 (4) Assemble the stand screw 4ea. SK85 SK95 - 28 - Copyright © LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 29: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 30 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.
  • Page 31 ☞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.
  • Page 32 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.
  • Page 33 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.
  • Page 34 /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.
  • Page 35 (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.
  • Page 36 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.
  • Page 37 "POWER_OFF_BY_UNKNOWN" Power off by unknown status except listed case "POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 38 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.
  • Page 39 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.
  • Page 40 (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.
  • Page 41 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.
  • Page 42 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.
  • Page 43 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.
  • Page 44 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.
  • Page 45 “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.
  • Page 46 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.
  • Page 47 Exchange Main Board (1) ~ (3) A-3/11 ~ A-5/11 <Appendix> Exchange Module (1) ~ (3) A-6/11 ~ A-10/11 T-con (1) ~ (2) A-9/11 ~ A-10/11 Exchange Power Board (PSU) A-11/11 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 48 How to use the Service remote control After changing Main Board, Checking list E. Etc Operation Test Pattern – ADJ 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.
  • Page 49 R7801: 1.8V (normal) After Remove the Rear Cover, turning on the power and check with the naked eye, Whether you can checking voltage of R7801 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 50 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.
  • Page 51 TUNER input signal strength checking method All Settings  Channels  Channel Tuning  Manual Tuning When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 52 Standard Repair Process Detail Technical Manual Error symptom A. Video error_Video error, video lag/stop Content TV Version checking method 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.
  • Page 53 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.
  • Page 54 Revised Content Content TV connection diagram 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.
  • Page 55 Error symptom A. Video error_Color error Check Link Cable (EPI) reconnection condition Content 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.
  • Page 56 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.
  • Page 57 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.
  • Page 58 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.
  • Page 59 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.
  • Page 60 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.
  • Page 61 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.
  • Page 62 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.
  • Page 63 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.
  • Page 64 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.
  • Page 65 Appendix : Exchange Power Board (PSU) No Light No picture/Sound Ok A - 11/11 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 66 Error symptom symptom date Revised Content Check front display LED Check front display Logo Content 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.
  • Page 67 Check power input voltage and ST-BY 3.5V Content Check power input voltage and ST-BY 3.5V Content date 55/65SK9000PUA Power Board Voltage & Current DC 13.2V line ST-BY Votage Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 68 5) Driver On signal error 6) Local dimming data error 7) Driver IC error or MCU error Check 8) V-sync No approve < Slim Direct > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 69 <ALL MODELS> 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.
  • Page 70 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.
  • Page 71 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.
  • Page 72 Checking order to check remote control Checking order 1, 2. Check IR cable condition between IR & Main board. Check the st-by 3.5V on the terminal 4 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 73 Checking order to check motion remote/wifi Checking order 1. Check IR cable condition between IR & Main board. 2. Check the 3.5V on the terminal 1 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 74 Standard Repair Process Detail Technical Manual Error symptom D. Function error Content How to use the Service remote control 1. How to access the remote control Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 75 Digital EYE function ON/OFF For some Model, access to the Test Pattern Used for screen tilting change (Access to the old PDP control mode) TILT Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 76 Connects to external input 1,2,3 AV1,2,3 (Added function) Connects to Component 1,2 COMP1,2 (Added function) HDMI1,2,3,4 Connects to HDMI 1,2,3,4 (Add function) Connects to DVI DVI (Add function) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 77 백커버 뒤에 ID Label 확인하여 입력한다. 2. Go to ADJ button of Operation remote. 13번. White Balance로 진입 - 색온도의 R, G, B (GAIN, Cut) 값을 기록한 후 메인보드 교체 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 78 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.
  • Page 79 Smart JIG Power Diagnosis Muitl Gender Guide (P/N : RAD32507801) (P/N : RAD33187801) A 21 (1/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 80: Main Board

    (OLED) 24Pin 28Pin SK85/SK96 UK64/UK65 SK95/SK99 16Y/17Y (UH/UJ) 18Pin 28Pin 28Pin 12Pin 12Pin 28Pin Includes 49UJ63 16Y/17Y 16Y/17Y (SJ/UJ) (UH) A21 (2/19) (UH) (UH/SJ) (LH/LJ) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 81 EF95 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 A21 (3/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 82 “A: 2013 LCD POWER” 2014 ▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG. A21 (4/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 83 - 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 A21 (5/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 84 ▶ Disconnect the Main Board 24Pin Power Cable connector. ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector A21 (6/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 85 ▶ 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. A21 (7/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 86 ▶ 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. A21 (8/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 87 ▶ 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 A21 (9/19) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 88 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A21 (10/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 89 ▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A21 (11/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 90 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A21 (12/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 91 ▶ When the NG LED turns on, the Power Board ▶ Fix the LCD MODEL switch to 20V.(Smart JIG) A21 (13/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 92 ▶ Connect the 18Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A21 (14/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 93 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A21 (15/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 94 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A21 (16/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 95 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 12Pin connector ▶ When the NG LED turns on, the Power Board A21 (17/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 96 ▶ Connect the 12Pin Power Cable connector to the Muitl Gender JIG 24Pin connector ▶ When the NG LED turns on, the Power Board A21 (18/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 97 ▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector ▶ When the NG LED turns on, the Power Board A21 (19/19) can be judged as defective. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

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