LG 42LM620T-ZE User Manual

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Printed in KoreaP/NO : MFL67360910 (1203-REV00)
CHASSIS : LD22E
MODEL : 42LM620S/620T/625S
MODEL : 42LM620S/620T-ZE 42LM625S-ZG
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED LCD TV
SERVICE MANUAL
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
Page view 0
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Summary of Contents

Page 1 - SERVICE MANUAL

Printed in KoreaP/NO : MFL67360910 (1203-REV00)CHASSIS : LD22EMODEL : 42LM620S/620T/625SMODEL : 42LM620S/620T-ZE 42LM625S-ZGCAUTIONBEFORE SERVICING

Page 2 - CONTENTS

- 10 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesADJUSTMENT INSTRUCTION1. App

Page 3 - SAFETY PRECAUTIONS

Entry method 1. Press the ADJ button on the remote controller for adjustment.2. Enter into White Balance of item 6. 3. After recording the R, G, B (GA

Page 4 - SERVICING PRECAUTIONS

Standard Repair Process Detail Technical ManualPower Board voltage measuring methodA. Video error_No video/ AudioA5Established date Revised date Error

Page 5

MENU -Æ Set up Æ support -Æ signal test-Æ select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.)Standard Repair Proce

Page 6 - SPECIFICATION

Standard Repair Process Detail Technical ManualLCD-TV Version checking methodA. Video error_Video error, video lag/stop 1. Checking method for remote

Page 7

Standard Repair Process Detail Technical ManualLCD TV connection diagram (1)A. Video error _Vertical/Horizontal bar, residual image, light spot As the

Page 8 - 6. RGB input (PC)

Checking method: 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2. After measuring each vol

Page 9 - 7. HDMI Input

Standard Repair Process Detail Technical ManualAdjustment Test pattern - ADJ KeyA. Video error_Color error You can view 6 types of patterns using the

Page 10 - ADJUSTMENT INSTRUCTION

Solder defect, CNT BrokenT-Con Defect, CNT BrokenT-Con Defect, CNT BrokenT-Con Defect, CNT BrokenSolder defect, CNT BrokenSolder defect, CNT BrokenSol

Page 11 - Play: Start

Abnormal Power SectionSolder defect, Short/CrackAbnormal Power SectionSolder defect, Short/CrackFuse Open, Abnormal power sectionNoiseGRADATIONGRADATI

Page 12 - 3.5.2. Method & notice

Appendix : Exchange PSU(LED driver)No LightDim LightDim LightDim LightNo picture/Sound OkCopyright © 2012 LG Electronics. Inc. All rights reserved. On

Page 13 - 4. Manual Adjustment

- 11 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes3.2. MAC address D/L, CI+ k

Page 14 - (2) Manual adjustment. method

Appendix : Exchange the Module (1)Panel Mura, Light leakagePress damageCrosstalkCrosstalkPress damagePanel Mura, Light leakagePress damageUn-repairabl

Page 15 - (Edge LED Model)

Vertical BlockSource TAB IC DefectHorizontal BlockGate TAB IC DefectGate TAB IC DefectGate TAB IC DefectVertical LineSource TAB IC DefectVertical Bloc

Page 16 - 4.9.2. Method

Standard Repair Process Detail Technical ManualCheck front display LEDB. Power error _No powerA17Established date Revised date Error symptomContentLCD

Page 17 - 5. Audio

Standard Repair Process Detail Technical ManualCheck power input voltage and ST-BY 5VB. Power error _No powerA18Established date Revised date Error sy

Page 18 - SCREW ASSEMBLY WORKING GUIDE

Standard Repair Process Detail Technical ManualChecking method when power is ONB. Power error _No powerA19Established date Revised date Error symptomC

Page 19 - BLOCK DIAGRAM

Entry method1. Press the IN-START button of the remote controller for adjustment2. Check the entry into adjustment item 3Standard Repair Process Detai

Page 20 - EXPLODED VIEW

Checking method1. Press the MENU button on the remote controller2. Select the AUDIO function of the Menu3. Select TV Speaker from Off to OnStandard Re

Page 21 - HDCP EEPROM

Checking order when there is no audio① Check the contact condition of or 24V connector of Main Board② Measure the 24V input voltage supplied from Powe

Page 22 - PLACE AT JACK SIDE

Checking order1, 2. Check IR cable condition between IR & Main board.3. Check the st-by 3.3V on the terminal 6.4. When checking the Pre-

Page 23 - SMD Gaskit

Standard Repair Process Detail Technical ManualSequence of the Vcom adjustmentD. VCOM Adjustment1. Case LCD module change T-Con board change 2. Equ

Page 24 - PLACE AT IC6000

- 12 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes3.5. Model name & Serial

Page 25

- 13 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes4. Manual Adjustment* ADC

Page 26

- 14 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes4.2. White Balance Adjustmen

Page 27

- 15 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes▪ Adjustment condition and c

Page 28 - Renesas MICOM

- 16 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes4.6. 3D function test(Patter

Page 29

- 17 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes4.12. GND and Internal Press

Page 30 - RGB/ PC AUDIO/ SPDIF

- 18 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes Screw specification and ap

Page 31

- 19 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesL/R InSPDIF OUTUSBAudioAMP(

Page 32

- 2 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesCONTENTSCONTENTS ...

Page 33 - Zener Diode is

- 20 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesA7A2A21A5A10AG19003002004005

Page 34 - +5V_USB FOR USB1

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 35

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 36 - ALL M_REMOTE OPTION

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 37 - Ethernet Block

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 38

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 39

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 40 - HEADPHONE AMP

THERMALTHERMALTHERMALTHERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE

Page 41 - Option FOR LG1152

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 42

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 43 - DVB-S2 LNB Part Allegro

- 3 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesMany electrical and mechanica

Page 44 - 2011.11.21

Fiber OpticTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SH

Page 45

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 46 - LOCAL DIMMING

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 47 - THIS IS REVERSE PATTERN !!!!

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 48 - Don’t Connect Power At VDDI

USB DOWN STREAMUSB DOWN STREAMUSB DOWN STREAMTHERMALTHERMALTHERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT

Page 49

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 50

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 51 - Engineering guide

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 52 - ◈ CONTENT ◈

THERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK

Page 53 - EPI Interface

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 54 - HF mini-LVDS

- 4 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesSERVICING PRECAUTIONSCAUTION:

Page 55

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 56 - Main PCB for Broadband

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 57 - MTK5369 Block Diagram( LM76 )

THERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK

Page 58 - Jack Interface

THERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK

Page 59 - EPI RIGHT

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 60 - Main SoC

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 61 - LVDS Tx

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 62 - Interconnection - 1

THERMALTHERMALTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL

Page 63 - Ass’y Picture

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 64 - Power LED Scenario

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESSPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.FILRE AND ELECTRICAL SHOCK HAZARDS

Page 65 - Manual of Touch Sensitivity

- 5 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesIC Remove/ReplacementSome cha

Page 67

2012 LED/LCD TVEngineering guide< Applicable Model >XXLM760S-ZBCopyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and

Page 68 - 1. System

◈ CONTENT ◈New features Main PCBs Block Diagrams, IIC Map Structure of TV set and connection of sub ass’ysNew sub ass’ys- Instruction of new sub ass’y

Page 69

EPI InterfaceEPI(Embedded Point-Point Interface)Features• Point-Point topology (support 2 Pair option)• CDR (Clock Data Recovery)• Bandwidth up to

Page 70 - 3. M4 Block Diagram

EPI Interface (mini-LVDS vs. EPI)ComparisonHF mini-LVDSWhat to changeEPI (Embedded clock P-to-P Interface)-Difficult to upgrade bandwidth limit-Multip

Page 71 - 4. Function list

HF mini-LVDS EPITopologyProtocolFeatures@10bit, FHD120• Multi Drop• Data rate: 660Mbps• External clock• Point to Point• Data rate : 1.8Gbps• Embedded

Page 72 - Method Description

Main PCB for BroadbandMain + TCON all in oneTo PSU12641Main processor, DDR MemoryeMMC Memory234Micom for Key/IR sensing PMICAudio AMP (10W+10W)xxLM760

Page 73

MTK5369 Block Diagram( LM76 )L/R InSPDIF OUTUSBAudioAMP(NTP7500 or STA)I2S OutMTKCI slotCI slotP_TSCVBSP_TST/C DemodIF(+/-)USB1RS-232CPC-RGBPC-AUDIOO

Page 74 - WIFI built in feature

Jack Interface[PR0P],[PB0P],[Y0P][OPCTRL8][VDACX_OUT][VDACY_OUT][AUOUTL0][ADIN0_SRV][CVBS2P][AIN0_L_ADDC][AIN0_R_AADC][SPDIF_OUT][AUOUTR0]Main SoCMTK[

Page 75

GP4 Backend block diagram (EPI & T-con)IC7700TPS65178IC7701TPS6519850PinEPI LEFT50PinEPI RIGHTVCOM, GIP_RSTR(0옴)OPTDISCHGVGL_IVGL_IVGH_ODD, VGH_EV

Page 76

- 6 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesSPECIFICATIONNOTE : Specifica

Page 77 - 4. Changed BOM

GP4 Backend block diagram (EPI & T-Con)Main SoCMTKIC7700TPS6517850PinEPI LEFT50PinEPI RIGHTGMA[1][3][9][10][12][14][15][16][18]GMA[4][5][7][12][15

Page 78 - 1. Widevine?

GP4 Backend block diagram (LVDS Tx & Local Dimming)LVDS Tx BlockMain SoCMTKLVDS_SELBIT_SEL_LOW51PinLVDSOutputPANEL_VCC (+12V)41PinLVDSOutput10-bit

Page 79 - 2. HDCP 2.0 & NETFLIX?

Interconnection - 11Main PCB2Power Board3Tact key PCBT-con Driver12345Main / LPB 24Pin cable Main / Module EPI cable 50& 50PIN LED driver / PSU10P

Page 80 - 3. DTCP?

2012Y IR + Soft touch PCB PinmapCircuit Block DiagramPin ConfigurationKEY1, KEY2 Voltage(Tolerance of voltage ±0.2V)Ass’y PictureCopyright © 2012 LG E

Page 81

2012Y IR + Soft Touch LED Lighting Scenario구분Spec 내용비고PowerIndicator UI- 12Y GP4 High(L9), GP4 Mid(MTK), GP4 Low(S7LR2)Æ“ Power Light” UI Delete compa

Page 82

Introductions of GP4 Sensor (Touch IC)Touch Key Threshold Level (Ta = 25ºC )1. Verify the number of THR at first.2. Once you correctly touch Touch bu

Page 83

Introductions of GP4 Sensor (Touch IC)Touch EEPROM Register change with USB port1. Write all of the address, value (Hex) as a below. capable of only

Page 84 - Continue to the next page

Introductions of 12Y RF ass’y + Magic Remote control Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes

Page 85 - A. Video error

1. SystemRemoteRF ReceiverTVUART or USBRF Pairing Information Transmission (Send to TV after Paired)• Static Calibration Data (Bypass only)• Rem

Page 86

2. Remote Buttons (M3 vs. M4)BUTTONRF UnpairedIR_CODERF PairedRF_CODEIR continuousrepeatETC.Phsical ButtonsPOWER 0x08 0x08 Y IR onlyBACK 0x28 0x8028 Y

Page 87 - A. Picture Problem

- 7 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposesNo. Item Specication Remarks

Page 88 - A. Picture Problem (DVB-S/S2)

MPU-3050 (Gyro)(Invensense)LIS331DLH(Accel.)(STMicro)BCM20733M(BROADCOM) Bluetooth 3.0Key Button( 4 x 5 )AA x 2 BatteryDC-DC 2.8V LDOPower ManagementB

Page 89

주요 Item IC Manufacturer FunctionRemoconVoiceVoice Codec WM8950 Wolfson 16KHz Sampling of Audio dataMEMS Mic. SPU0414HR5H Knowles Sensing Voice Motion

Page 90

5. RF Pairing / Un-pairing MethodMethod DescriptionRF Pairing Method1– If unpaired, just press "OK" button.– If paired, press "OK"

Page 91 - B. Power error

Introductions of 12Y WIFI built in ass’yCopyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposesLGE Internal

Page 92

WIFI Built in ass’y feature(LGIT)WIFI built in featurePIN USB interface1 5V2 DM3 DP4 GND-Pin map- Block diagramCopyright © 2012 LG Electronics. Inc. A

Page 93 - C. Audio error

WIFI Built in Block-diagram(Arcadyan)Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposesLGE Internal Use

Page 94

WIFI Built in ass’y SpecificationCopyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposesLGE Internal Use Onl

Page 95 - D. General Function Problem

12Y Widevine & HDCP 2.0 & NETFLX 1. Widevine?2. HDCP 2.0 & NETFLIX?3. DTCP?4. Changed BOMCopyright © 2012 LG Electronics. Inc. All righ

Page 96 - D. Function error

1. Widevine?[Widevine]Widevine is the Solution(Library) offering Adaptive Streaming and DRM.In BBTV, when special CP do service, this module is requir

Page 97 - E. Noise

 HDCP9High-bandwidth Digital Content Protection9 Protect high-value digital motion pictures, television programs and audio against unauthorized inter

Page 98 - F. Exterior defect

- 8 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes5. Component Video Input (Y,

Page 99 - Continued from previous page

3. DTCP?[DTCP]The Digital Transmission Content Protection Specification defines a cryptogrphic protocol for protecting audio/video entertainment conte

Page 100 - LGE Internal Use Only

4. Changed BOMAs-Was CurrentÆ 추가 Add Item1.Marlin (Yes/No)2.CNTV (Yes/No)3.HDCP Tx (Yes/No)4.DTCP Rx (Yes/No)5.HDCP Rx (Yes/No)주3) CNTV [Yes] : China

Page 101 - Edge LED

4. Changed BOMCopyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposesLGE Internal Use Only

Page 102 - Æ support -Æ signal test

Contents of LCD TV Standard Repair ProcessNo. Error symptom (High category) Error symptom (Mid category) Page Remarks1A. Video errorNo video/Normal au

Page 103

Contents of LCD TV Standard Repair Process Detail Technical ManualNo. Error symptom Content Page Remarks1A. Video error_ No video/Normal audio Check L

Page 104 - <ALL MODELS>

Normal audioYNMove to No video/No audioNo videoNormal audioCheck Back LightOn with naked eyeOnYNCheck Power Board12v,3.5v etc.Normal voltageYNReplace

Page 105

Normalvoltage?Check various voltages of Power Board ( 3.5V,12V,20V or 24V…)No Video/No audioCheck and replace MAIN B/DYReplace Power Board and repair

Page 106 - A. Video error_Color error

A. Picture ProblemPicture broken/ FreezingYN☞ A6NCheck RF Signal levelNormal Signal?Check RF Cable Connection1. Reconnection2. Install BoosterCheckS/W

Page 107

A. Picture Problem (DVB-S/S2)Tuning fail, Picture broken/ FreezingYN☞ A6Check RF Signal levelNormal Signal?CheckS/W VersionS/W UpgradeSVC Bulletin?Nor

Page 108

Colorerror?YN※ Check and replace Link Cable(LVDS) and contact conditionYNReplace Main B/DColorerror?Check error color input modeCheck color by input-E

Page 109 - No picture/Sound Ok

- 9 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.Only for training and service purposes7. HDMI Input7.1. DTV modeNo.

Page 110 - Un-repairable Cases

Screennormal?NYCheck external device connection conditionYNCheck and replace Link CableNormal?YNScreennormal?Replace Main B/D(adjust VCOM)Replace modu

Page 111

B. Power errorNo powerPower LEDOn?YNDC Power onby pressing Power Key On Remote controlYNNormal operation?Check Power On ‘”High”Check Power cordwas in

Page 112

B. Power errorOff when on, off while viewing, power auto on/offError?NYCheck Power OffModeFix A/C cord & Outlet and check each 3 phase outCheck A/

Page 113 - B. Power error _No power

No audioScreen normalCheck user menu > Speaker offOffNYCancel OFF Check audio B+ 24V of Power BoardNormalvoltageYNReplace Power Board and repair p

Page 114

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audioC. Audio errorWrecked audio/ discontinuation/noise Wreck

Page 115

D. General Function ProblemRemote control & Local switch checkingYN1. Remote control(R/C) operating errorCheck R/C itself OperationNormaloperating

Page 116 - Checking method

Check technical information- Fix information- S/W VersionNYTechnical information?Check input signalSignalinput?YNExternal Input andComponentRecognitio

Page 117

Check location of noiseIdentify nose typeCircuit noiseReplace PSU(with LED driver)Replace LED driver Mechanical noiseCheck location of noiseOR※ When t

Page 118

Replace moduleZoom part with exterior damageModuledamageCabinetdamageReplace cabinetReplace remote controllerRemote controllerdamageStanddentReplace s

Page 119 - 3. Adjust sequence

Contents of LCD TV Standard Repair Process Detail Technical ManualNo. Error symptom Content Page Remarks21B. Power error_No powerCheck front display L

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