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LG Electronics 640T-ZA Standard Repair Process Detail Technical Manual, All Models, date

Models: 32LM640S/640T-ZA 640T-ZA

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Standard Repair Process Detail Technical Manual

LCD TV

Error	C. Audio error_No audio/Normal video	Established	2010. 12 .14
symptom
		date
Content	Checking method in menu when there is no audio	Revised		A24
		date

Checking method

1.Press the MENU button on the remote controller

2.Select the AUDIO function of the Menu

3.Select TV Speaker from Off to On

Copyright © 2012 LG Electronics. Inc. All rights reserved.	LGE Internal Use Only
Only for training and service purposes

Page 115

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LG Electronics 640T-ZA Standard Repair Process Detail Technical Manual, All Models, date, LGE Internal Use Only

Contents

LED LCD TV MODEL 32LM640S/640T32LM640S/640T-ZA SERVICE MANUALLG Electronics. Inc. All rights reserved CONTENTSOnly for training and service purposes CopyrightLeakage Current Cold CheckAntenna Cold Check SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE Before returning the receiver to the customerElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSRemoval IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement2. Requirement for Test SPECIFICATION4. Model General Specification 1. Application rangesymbolrate SpecificationSymbolrate 4.0Msymbols/s to 7.2Msymbols/s6. RGB input PC 5. Component Video Input Y, Cb/Pb, Cr/Pr7.2. PC mode 7. HDMI Input 7.1. DTV mode2. Designation ADJUSTMENT INSTRUCTION3. Automatic Adjustment 1. Application Range3.3. LAN 3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L3.4. LAN PORT INSPECTIONPING TEST SET PC3.5.1. Model name & Serial number D/L 3.7. WIFI MAC ADDRESS CHECK3.5. Model name & Serial number Download 3.6. CI+ Key checking method4.1.3. Download method 4. Manual Adjustment4.1.1. Overview 4.1.2. Equipment4.2.2. Equipment 4.2. White Balance Adjustment4.2.4. Adj. Command Protocol 4.2.1. Overview4.2.7. LED White balance table 4.5. Magic Motion Remote control test4.3. EYE-Q function check 4.4. Local Dimming Function Check4.9. Option selection per country 4.7. Wi-Fi Test4.6. 3D function test 4.8. LNB voltage and 22KHz tone check5. Audio 6. USB S/W DownloadService only4.12. GND and Internal Pressure check HDMI BLOCK DIAGRAMSide RearIMPORTANT SAFETY NOTICE EXPLODED VIEWJTAG 10K EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22NVRAM X-TALPLACE AT JACK SIDE Only for training and service purposesPLACE AT JACK SIDE Place at JACK SIDELGE Internal Use Only SMD GaskitOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedOnly for training and service purposes PLACE AT JACK SIDEPLACE AT MAIN SOC SIDE PLACE AT IC6000IC701 H5TQ2G63BFR-PBC Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyCopyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only On-semi FROM LIPS & POWER B/DPowerDET PANELPOWEREye Sensor Option Renesas MICOMFor Debug MICOM MODEL OPTIONHDMI4 Only for training and service purposesHDMI1 UI HDMI3PC AUDIO Only for training and service purposesRGB/ PC AUDIO/ SPDIF SPDIF OUTLGE Internal Use Only Only for training and service purposesESD for MTK Copyright 2012 LG Electronics. Inc. All rights reservedCOMPONENT 1 PHONE JACK Only for training and service purposesRS232C CVBS 1 PHONE JACKOnly for training and service purposes IR & KEYZener Diode is close to waferUSB2 MAX 1.5A USBWIFI+5VUSB FOR USB1 USB1LGE Internal Use Only Only for training and service purposesFull Scart18 Pin Gender Copyright 2012 LG Electronics. Inc. All rights reservedAR4800 ZigBeeRadio Pulse MREMOTE OPTIONALL MREMOTE OPTION Only for training and service purposesESD for LG1152 Ethernet BlockOnly for training and service purposes ESD for MTKGP4MT5369 Only for training and service purposesIC5800 STA380BWLGE Internal Use Only Only for training and service purposesSCART AUDIO MUTE Copyright 2012 LG Electronics. Inc. All rights reservedCopyright 2012 LG Electronics. Inc. All rights reserved EARPHONE AMPOnly for training and service purposes HEADPHONE AMPCopyright 2012 LG Electronics. Inc. All rights reserved Option FOR MTKOption FOR LG1152 Only for training and service purposesTU6500 T/C/S & H/NIM & T2/C TUNEREU & CHINAOnly for training and service purposes Vout=0.6*1+R1/R2DCDCGND and AGND are connected OptionLNBOnly for training and service purposes DVB-S2 LNB Part AllegroOnly for training and service purposes AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACKFOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V FOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMPCopyright 2012 LG Electronics. Inc. All rights reserved LVDSOnly for training and service purposes 51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector1/16W LOCAL DIMMINGOnly for training and service purposes AR7600Only for training and service purposes POWER BLOCKTHIS IS REVERSE PATTERN LEVEL SHIFTER BLOCKHYNIXEMMC2GB Don’t Connect Power At VDDIeMMC I/F Only for training and service purposesLGE Internal Use Only Only for training and service purposesPlace Near Micom Copyright 2012 LG Electronics. Inc. All rights reservedPage Copyright 2012 LG Electronics. Inc. All rights reserved Applicable Model XXLM760S-ZBOnly for training and service purposes 2012 LED/LCD TV Engineering guideAdjust way of new features widevine… Repair guide CONTENTNew features Main PCBs Block Diagrams, IIC Map Instruction of new sub ass’ys How to use tool DownloadEPI Interface EPIEmbedded Point-Point Interface FeaturesMerits What to change EPI Interface mini-LVDS vs. EPIHF mini-LVDS TCON ComparisonHF mini-LVDS EPI Interface mini-LVDS vs. EPIxxLM760S-ZB Main PCB for BroadbandWIFI Only for training and service purposesRear MTK5369 Block Diagram LM76Power load SideFull Scart18 Pin Gender Jack InterfaceOnly for training and service purposes Main SoC MTKCopyright 2012 LG Electronics. Inc. All rights reserved GP4 Backend block diagram EPI & T-conOnly for training and service purposes R 47옴Only for training and service purposes GP4 Backend block diagram EPI & T-ConEPI CH1/2/3 EPI CH4/5/6Dual-link LVDS Output GP4 Backend block diagram LVDS Tx & Local DimmingLVDS Tx Block Only for training and service purposesxxLM760S-ZA InterconnectionPCBs CablesKEY1, KEY2 Voltage Circuit Block DiagramAss’y Picture Pin Configuration 2012Y IR + Soft touch PCB Pinmap2012Y IR + Soft Touch LED Lighting Scenario Power LED ScenarioSpec 내용 Manual of Touch Sensitivity Introductions of GP4 Sensor Touch ICTouch Key Threshold Level Ta = 25ºC Addr Value Touch EEPROM Register change with USB portIntroductions of GP4 Sensor Touch IC LGE Internal Use Only Introductions of 12Y RF ass’y + Magic Remote controlOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reserved™ Motion Data Transmission 1. System™ Pairing Information Transmission Send to TV after Paired Pairing Information Transmission Sequencehome powerpower muteConnector 3. M4 Block DiagramAA x 2 Battery Power ManagementFunction 4. Function list주요 Item ManufacturerMethod 5. RF Pairing / Un-pairing MethodDescription LGE Internal Use Only Introductions of 12Y WIFI built in ass’yOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedWIFI built in feature WIFI Built in ass’y featureLGITBlock diagram Pin mapLGE Internal Use Only WIFI Built in Block-diagramArcadyanOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedLGE Internal Use Only WIFI Built in ass’y SpecificationOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedCopyright 2012 LG Electronics. Inc. All rights reserved 12Y Widevine & HDCP 2.0 & NETFLX1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM Only for training and service purposes1. Widevine? ‰ HDCP 2. HDCP 2.0 & NETFLIX?‰ Netflix ‰ Why HDCP2.0?3. DTCP? Only for training and service purposes 4. Changed BOMAs-Was CurrentLGE Internal Use Only Only for training and service purposes4. Changed BOM Copyright 2012 LG Electronics. Inc. All rights reservedContents of LCD TV Standard Repair Process Page Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom ContentReplace T-con Board or module And Adjust VCOM Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D CableA2 Check Power Board 24v output Check Power Board 12v,3.5v etcdate Check various voltages of Power BoardOnly for training and service purposes Standard Repair ProcessCheck Check RF Signal levelS/W Version Check S/W Version Check RF Signal levelA10/ A11 Color error?Color error? Color error?External Input error Component error RGB error HDMI DVI External device screen error-Color errorVertical/Horizontal bar, residual image, light spot Replace Main B/D adjust VCOMMeasure voltage of each output of Power B/D Check Power LEDPower LED Y On? Check Power On ‘”High”Power off List Error?Check Power Off Mode If Power Off mode is not displayed Check Power B/D voltagedate of Power BoardOnly for training and service purposes Standard Repair ProcessCheck audio B+ Voltage In case of External Input signal error Check and fix external deviceStandard Repair Process datePower B/D don’t have problem Check & Repair Cable connection Connector solderCheck IR Output signal Check 3.5v on Power B/D Replace Power B/D or Replace Main B/DStandard Repair Process Recognition errorRecognition error Only for training and service purposesIdentify nose type F. Exterior defect Adjust VCOMLCD TV Page Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom ContentALL MODELS Standard Repair Process Detail Technical ManualSMAW200-H24S YEONHO 24 Pin Power Board ↔ Main BoardStandard Repair Process Detail Technical Manual Edge LEDdate Only for training and service purposesStandard Repair Process Detail Technical Manual ALL MODELSALL MODELS 1. Checking method for remote controller for adjustmentOnly for training and service purposes Standard Repair Process Detail Technical Manualdate Only for training and service purposesStandard Repair Process Detail Technical Manual ALL MODELSALL MODELS Standard Repair Process Detail Technical ManualChecking method date Only for training and service purposesStandard Repair Process Detail Technical Manual dateAppendix Exchange T-Con Board Only for training and service purposes Abnormal Power SectionAbnormal Power Section Fuse Open, Abnormal power sectionDim Light Appendix Exchange PSULED driverOnly for training and service purposes No LightCopyright 2012 LG Electronics. Inc. All rights reserved Appendix Exchange the ModuleUn-repairable Cases In this case please exchange the module Only for training and service purposesUn-repairable Cases In this case please exchange the module Appendix Exchange the Moduledate Only for training and service purposesStandard Repair Process Detail Technical Manual dateEdge LED Edge LED When st-by, only 3.5V is normally onStandard Repair Process Detail Technical Manual For ’10 models, there is no voltage out for st-by purposeSMAW200-H24S YEONHO Check “power on” pin is highStandard Repair Process Detail Technical Manual Edge LED Edge LEDALL MODELS B. Power error Off when on, off whiling viewingOnly for training and service purposes Standard Repair Process Detail Technical Manualdate Only for training and service purposesStandard Repair Process Detail Technical Manual ALL MODELSALL MODELS Standard Repair Process Detail Technical ManualALL MODELS Standard Repair Process Detail Technical ManualLCD module change T-Con board change Standard Repair Process Detail Technical Manual