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LG 32LJ500V-ZB Service Manual
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LG 32LJ500V-ZB Service Manual

Chassis: nt72461
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LED TV
SERVICE MANUAL
Chassis: NT72461
MODEL : 32LJ500V-ZB（EU/CIS）
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL

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Summary of Contents for LG 32LJ500V-ZB

  • Page 1 CONFIDENTIAL LED TV SERVICE MANUAL Chassis: NT72461 MODEL : 32LJ500V-ZB（EU/CIS） CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 2 CONTENTS CONTENTS …………………………………………………………………………………………………..2 SAFETY PRECAUTIONS………………………………………………………………………………….…..3 SERVICING PRECAUTIONS……………………………………………………………………………….…4 SPECIFICATION………………………………………………………………………………………………...7 SOFTWARE UPGRADE PROCEDURE…………………………………………………………………….10 BLOCK DIAGRAM……………………………………………………………………………………………12 EXPLODED VIEW…………………………………………………………………………………………….13 PRODUCT DISASSEMBLY PROCESS……………………………………………………………………15 TROUBLE SHOOTING GUIDE ..................APPENDIX 17 ADJUSTMENT INSTRUCTION……………………………………………………………………………...44 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 3: Safety Precautions

    If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 MΩ and 5.2 MΩ. When the exposed metal has no return path to the Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Servicing Precautions

    CAUTION: Be sure no power is applied to the chassis Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 5 IC. When working with boards using the close as possible to diode body. familiar round hole, use the standard technique as Bend the two remaining leads perpendicular y to Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 6 Solder the overlapped area and clip off any excess jumper wire. Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 7: Specification

    43 inch Wide (1920 × 1080) 32LJ500V-ZB, 32 inch Wide (1920 × 1080) 32LJ500V-ZA 4.00 Screen Size 32 inch Wide (1366 × 768) 28 inch Wide (1366 × 768) Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 8 50.00 720*576p 31.25 50.00 44.96 59.94 1280*720p 45.00 60.00 37.50 50.00 33.72 59.94 1920*1080i 33.75 60.00 28.13 50.00 67.43 59.94 1920*1080p 67.50 60.00 56.25 50.00 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 9 60.00 37.50 50.00 33.72 59.94 1920*1080i 33.75 60.00 28.13 50.00 67.43 59.94 67.50 60.00 56.25 50.00 1920*1080p 26.97 23.976 27.00 24.00 33.72 29.97 33.75 30.00 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Software Upgrade Procedure

    2.3 Updating Completed, Press Restart ,TV will reboot automatically. 2.4 Press “Settings+1999+Q.VIEW” on the remote to enter in factory mode to check your updated version. Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 11 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 12: Block Diagram

    DVBS2 Demod EJTAG Debug DVBT/T2 UART UART PCMICA Card x 1 8 bit NAND STBC HDMI x 2 HDMI FLASH USB x 1 DDR3 AUDIO Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 13 EXPLODED VIEW ARC1 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 BASE_L 905TXHSK32083800SX BASE_R X15T2685101CKD00Z1 BKT_STAND_L X15T2686101CKD00Z1 BKT_STAND_R X85T8086101CKD00AJ SHIELD_TUNER 905TXHSC32081700SX MAIN BOARD ASSY PLTVGL251XAT9 POWER BOARD ASSY 398GR12BELGN0003WX REMOTE CONTROL 395G801851RD340CKD LVDS CABLE 378G0110567YEK SPEAKER Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 15: Product Disassembly Process

    Separate the receive assembly from front cover. Fig.5 Unlock screw(“F”) to separate the receive board from IR LENS. Fig.1 ※Hold red circle area Pull in Fig.2 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 Fig.3 Fig.4 Fig.5 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 17 No audio Audio error Wrecked audio/discontinuation/noise Remote control & Local switch 10 Function error checking Circuit noise, mechanical noise 11 Noise Exterior defect 12 Exterior error Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 Audio error_ Wrecked audio/ Voltage and speaker checking method in case of audio error discontinuation Function error_No response in Remote controller operation checking method remote controller, key error Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 19 1/12 First of all,Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS, Speaker Cable, IR B/D Cable) Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 LED TV Error A. Video error Established date symptom No video/ No audio Revised date 2/12 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 21 LED TV Error A. Video error Established date symptom Tuning fail Revised date 3/12 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 LED TV Error A. Video error Established date symptom Color error Revised date 4/12 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 23 Error A. Video error Established date symptom Vertical/Horizontal bar,residual image, Revised date 5/12 light spot, external device color error Vertical/Horizontal bar, residual image, light spot Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 LED TV Error Power error Established date symptom No power Revised date 6/12 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 25 LED TV Error Power error Established date symptom Off when on, off while viewing, power auto Revised date 7/12 on/off Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 LED TV Error Audio error Established date symptom No audio Revised date 8/12 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 27 LED TV Error Audio error Established date symptom Wrecked audio/discontinuation/noise Revised date 9/12 abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 LED TV Error Function error Established date symptom Remote control & Local switch checking Revised date 10/12 1.Remote control(R/C) operating error Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 29 LED TV Error Noise Established date symptom Circuit noise, mechanical noise Revised date 11/12 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 LED TV Error Exterior defect Established date symptom Exterior defect Revised date 12/12 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 31 Appendix : Exchange T-Con Board (1) Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 Appendix : Exchange T -Con Board (2) Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 33 Appendix : Exchange the Module (1) Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 34 Appendix : Exchange the Module (2) Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 35 1. Measure DC ~15V applying to Backlight module section, Check the C9122. 2. Output DC~24V from Backlight module to Light bar module, Check the Pin1/2 of CN8601. Check Pin contacting statement and connection statement. Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 36 C717 U703 +1.5V_SW C751 U715 +MAIN2V5 R752 U707 +12V_PANEL C754 U713 +0.95V_DV10 C738 U712 +3.3V_SB C780 Q703 PS_ON R701 U706 +5V_SB C706 U601 +12V_AUD C601 Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 37 LED TV LED TV connection diagram (1) Revised date Content As the part connecting to the external input, check the screen condition by signal Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 38 Error Video error_Color error Established date symptom LED TV Check and replace Link Cable (LVDS) and Revised date Content contact condition Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 39 Error Power error_No power Established date symptom LED TV Check front display LED Revised date Content Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 40 LED TV Check power input voltage and ST-BY 5V Revised date Content Check “12V (CN701-1/2)” pin is high (about 12V) C706 +5V_STB +3.3V_DV33SB C780 CN701-1/2 +12V Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 41 Check method when power is ON Revised date Content Check “3.3V(R704)” pin is high (about 3.3V) CN701-1/2 +12V C717 +3.3V_DV33 R707 +5V_SW R701 +3.3 PWR_ON Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 42 2. Connect the tester CN601 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 right reserved. Only for training and service purposes...
  • Page 43 Error Function error_ No response in Established date symptom LED TV Remote controller operation checking Revised date Content method Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 44 Error Video error_Color error Established date symptom LED TV Check test pattern Revised date Content Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 45: Adjustment Instruction

    NVM version NVM version Choice Normal, Warm, Cool model If 9 is on, press 8 to change RGB Change Normal, Warm, Cool model’s RGB Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 46 Don't use. if reset,follow [2] outgoing condition configuration Burn in on/off. Check CI+KEY, don’t change Exit factory model Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 47 [2] Outgoing condition configuration Please click“SETTINGS”and select the" OPTION "and press OK,then select the"Factory Reset "and press OK,go to "Reset" and press OK. Copyright ⓒ 2017 LG Electronics. Inc. All right reserved. Only for training and service purposes...