LG 32LF520D Service Manual

Chassis 15odmcat

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Owner's manual (72 pages)

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LED TV

SERVICE MANUAL

CHASSIS : 15ODMCAT

MODEL : 32LF520D

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

North/Latin America

Europe/Africa

Asia/Oceania

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

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Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : 15ODMCAT MODEL : 32LF520D CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Page 2 SCHEMATIC IR/LED BOARD ..........APPENDIX SCHEMATIC MAIN BOARD ............ APPENDIX POWER DRIVER CIRCUIT ............APPENDIX TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 3 An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only 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. LGE Internal Use Only Only for training and service purposes...
Page 6 Input Bottom : Audio L/R HDMI2 Side HDMI Input HDMI1 Bottom Side (USB 2.0) Head phone Head phone Side - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 23.976 1920*1080i 27.00 24.00 1920*1080i 33.716 29.97 1920*1080p 33.75 30.00 1920*1080p 56.25 50.00 1920*1080p 67.432 59.94 1920*1080p 67.50 60.00 - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 Signal Component 480i / 576i 480p / 576p 720p / 1080i 1080p (Only 50 Hz / 60 Hz ) - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 (7) AC OFF (8) TV set will display like as this photo. (9) Wait for display "100%" as below. - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 16 to 240 16 to 240 Adjust Adjust Luma Adjust Adjust remark YCbCr Gain Cr Gain Cb Gain Offset - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 Send IR COMMAND [51 AE 16 E9] to save data. <Caution> Color Temperature: COOL, Medium, Warm. G Gain should be kept on 0x84, - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 12 (6) When adjustment is completed, exit adjustment mode using EXIT key on Remote control. - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 EXPLODED VIEW IMPORTANT SAFETY NOTICE - 15 -...
Page 18 APPENDIX-Schematic-Main board 100uF/6D3/16V/NC 100uF/6D3/16V/NC 100uF/6D3/16V/NC 100uF/6D3/16V/NC 100uF/6D3/16V/NC 100uF/6D3/16V/NC - 18 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 TCON TCON GPIO_PM GPIO_PM R149 100/0402/NC R149 100/0402/NC C234 33pF/50V/0402 C234 33pF/50V/0402 HDMI HDMI - 19 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 24 0.1uF/16V/0402/NC 0.1uF/16V/0402/NC R180 R180 10K/1%/0402/NC 10K/1%/0402/NC R178 R178 10K/1%/0402 10K/1%/0402 0.1uF/16V/0402 0.1uF/16V/0402 - 24 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 34: Table Of Contents
Circuit noise, mechanical noise Exterior error Exterior defect * First of all, Check whether there is SVC Bulletin in GCSC System for these model. Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 35: Contents Of Lcd Tv Standard Repair Process
Defected Type caused by T-Con/ Inverter/ Module A -3/4 Module itself (1) Exchange Module itself (2) A -4/4 Continue to the next page Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 36: Error Symptom (High Category)
Voltage and speaker checking method in audio/discontinuation case of audio error D. Function error_ No response in Remote controller operation checking method remote controller, key error Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 37: No Video/Normal Audio
Check Backlight driver voltage and +30V input to LED light bar ciucuit or change main chip Normal Replace LED light bar module Voltage Repair power board Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 38: Video Error
No Video/ Normal of mian board and power replace board(+5V_standby, Voltage No audio MAIN B/D +12V_Normal) Replace Power Board and repair parts Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 39: Tuning Fail
Tuner soldering Main B/D Signal Setting - Check sound system Contact with signal Re-AUTO scan & re-check distributor or broadcaster (Cable or Air) Normal Picture Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 40: Color Error
Cable) and -HDMI cable Normal contact condition condition Color error Request repair for external device/cable Replace module (FFC) and contact Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 41 Main B/D error and HDMI by connecting Jig, pattern Generator, Set-top Box etc. Compo nent Request repair for error external device HDMI error Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 42: Power Error
Voltage Normal ※ Normal Check +12V_NORMAL Voltage from power board and 5V_standby Repair power circuit or from main board replace main board Replace main board Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 43: Off When On, Off While Viewing, Power Auto On/Off
Replace Main B/D Error Voltage voltage "high",normal it is about 3V Check A/C cord Replace Power B/D Fix A/C cord & Outlet Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 44: No Audio
Replace amplifier or Replace main board Check mute control circuit normal it should be high-> (AMP_EN) Check Disconn Speaker Replace MAIN Board ection disconnection Replace Speaker Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 45: Wrecked Audio/Discontinuation/Noise
Replace Main B/D Discontinuation/Noise Normal only for ATV Voltage (When RF signal is not Replace Power B/D received) Request repair to external cable/ANT provider Replace Main B/D Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 46: Remote Control & Local Switch Checking
When turn off light change IR SERSOR in room Normal Operating ※CAUTION: If R/C operate, Explain the customer Replace R/C cause is interference from light in room. Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 47: Circuit Noise, Mechanical Noise
Replace LED driver Check screw & internal Check location of Mechanical tape noise noise When the nose is from module, replace the module Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 48: Exterior Defect
Zoom part with Module Replace module damage exterior damage Cabinet Replace cabinet damage Remote Replace remote controller Controller damage Stand Replace stand damage Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 T-Con Defect, CNT Broken Abnormal Power Section Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 50 Appendix : Exchange T -Con Board (2) Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 51 Appendix : Exchange the Module (1) Press damage Crosstalk Press damage Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 52 Gate TAB IC Defect Gate TAB IC Defect Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 53 2. Output DC~35V from Backlight module to Light bar module, Check the Pin1 of P803. Check Pin contacting statement and connection statement. Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 54 +3.3V_Norma R1657 IC124 DDR_Power 1.5V C1282 +3.3V_Standby +1.15V_VDDC CN1-10 +5V_Standby +12V_NORMAL CN1-1 PWR-ON_OFF 3.3V R192 VCC_AUDIO 12V +1.2V_MCP Pin2 +3.3V_Tu FB11 Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 55 LCD TV connection diagram (1) Content date VIDEO AUDIO As the part connecting to the external input, check the screen condition by signal Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only60 Only for training and service purposes...
Page 56 Check and replace Link Cable (LVDS) and contact condition date 1. Check and replace LVDS Cable. 2. Check LVDS connection condition. Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 57 Power error_No power 2015.04.14 date symptom LED TV Revised Content Check front display LED date Screen Speakers Remote control sensor Power Indicator Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 58 LED TV Revised Content Check power input voltage and ST-BY 5V date Check “5V (CN1-10)” pin is high (about 5.0V) 3.3V CN1-10 Copyright © 2014 LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 59 LED TV Revised Content Check methond when power is ON date Check “3.3V(R1657)” pin is high (about 3.3V) R1657 3.3V Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
Page 60 2. Connect the tester CN3 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 © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...
Page 61 1. Check the 3.3V for IR power from CN2 PIN1 3.3V. 2. Connect IR wire cable CN2 to the IR Board and check for CN2 PIN2 signal. Copyright © 2014 LG Electronics. Inc. All rights reserved. Only for training and service purposes...

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