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LG Electronics 32LM640S/640T-ZA service manual Contents of LCD TV Standard Repair Process

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

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Contents of LCD TV Standard Repair Process

No.	Error symptom (High category)	Error symptom (Mid category)	Page	Remarks

1		No video/Normal audio	1

2		No video/No audio	2

3	A. Video error	Video error, video lag/stop, fail tunning	3, 4
	A. Video error
4		Color error	5

5		Vertical/Horizontal bar, residual image, light	6
5		spot, external device color error	6
		spot, external device color error

6		No power	7
	B. Power error
7	B. Power error	Off when on, off while viewing, power auto	8
		Off when on, off while viewing, power auto
		on/off
		on/off

8		No audio/Normal video	9
	C. Audio error
9	C. Audio error	Wrecked audio/discontinuation/noise	10
9		Wrecked audio/discontinuation/noise	10

10		No response in remote controller, key error,	11
10		recording error, memory error	11
	D. Function error	recording error, memory error
	D. Function error
11		External device recognition error	12

12	E. Noise	Circuit noise, mechanical noise	13

13	F. Exterior error	Exterior defect	14

First of all, Check whether there is SVC Bulletin in GCSC System for these model.

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

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Contents

SERVICE MANUAL MODEL 32LM640S/640T32LM640S/640T-ZA LED LCD TVCopyright CONTENTSOnly for training and service purposes LG Electronics. Inc. All rights reservedBefore returning the receiver to the customer SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE Leakage Current Cold CheckAntenna Cold CheckSERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesSmall-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal1. Application range SPECIFICATION4. Model General Specification 2. Requirement for Test4.0Msymbols/s to 7.2Msymbols/s SpecificationSymbolrate symbolrate5. Component Video Input Y, Cb/Pb, Cr/Pr 6. RGB input PC7. HDMI Input 7.1. DTV mode 7.2. PC mode1. Application Range ADJUSTMENT INSTRUCTION3. Automatic Adjustment 2. DesignationSET PC 3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L3.4. LAN PORT INSPECTIONPING TEST 3.3. LAN3.6. CI+ Key checking method 3.7. WIFI MAC ADDRESS CHECK3.5. Model name & Serial number Download 3.5.1. Model name & Serial number D/L4.1.2. Equipment 4. Manual Adjustment4.1.1. Overview 4.1.3. Download method4.2.1. Overview 4.2. White Balance Adjustment4.2.4. Adj. Command Protocol 4.2.2. Equipment4.4. Local Dimming Function Check 4.5. Magic Motion Remote control test4.3. EYE-Q function check 4.2.7. LED White balance table4.8. LNB voltage and 22KHz tone check 4.7. Wi-Fi Test4.6. 3D function test 4.9. Option selection per country5. Audio 6. USB S/W DownloadService only4.12. GND and Internal Pressure check Rear BLOCK DIAGRAMSide HDMIEXPLODED VIEW IMPORTANT SAFETY NOTICEX-TAL EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22NVRAM JTAG 10KPlace at JACK SIDE Only for training and service purposesPLACE AT JACK SIDE PLACE AT JACK SIDECopyright 2012 LG Electronics. Inc. All rights reserved SMD GaskitOnly for training and service purposes LGE Internal Use OnlyPLACE AT IC6000 PLACE AT JACK SIDEPLACE AT MAIN SOC SIDE Only for training and service purposesLGE Internal Use Only Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved IC701 H5TQ2G63BFR-PBCCopyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only PANELPOWER FROM LIPS & POWER B/DPowerDET On-semiMICOM MODEL OPTION Renesas MICOMFor Debug Eye Sensor OptionUI HDMI3 Only for training and service purposesHDMI1 HDMI4SPDIF OUT Only for training and service purposesRGB/ PC AUDIO/ SPDIF PC AUDIOCopyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposesESD for MTK LGE Internal Use OnlyCVBS 1 PHONE JACK Only for training and service purposesRS232C COMPONENT 1 PHONE JACKclose to wafer IR & KEYZener Diode is Only for training and service purposesUSB1 USBWIFI+5VUSB FOR USB1 USB2 MAX 1.5ACopyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposesFull Scart18 Pin Gender LGE Internal Use OnlyOnly for training and service purposes ZigBeeRadio Pulse MREMOTE OPTIONALL MREMOTE OPTION AR4800ESD for MTK Ethernet BlockOnly for training and service purposes ESD for LG1152STA380BW Only for training and service purposesIC5800 GP4MT5369Copyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposesSCART AUDIO MUTE LGE Internal Use OnlyHEADPHONE AMP EARPHONE AMPOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedOnly for training and service purposes Option FOR MTKOption FOR LG1152 Copyright 2012 LG Electronics. Inc. All rights reservedVout=0.6*1+R1/R2 T/C/S & H/NIM & T2/C TUNEREU & CHINAOnly for training and service purposes TU6500DVB-S2 LNB Part Allegro OptionLNBOnly for training and service purposes DCDCGND and AGND are connectedFOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACKFOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V Only for training and service purposes51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector LVDSOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedAR7600 LOCAL DIMMINGOnly for training and service purposes 1/16WLEVEL SHIFTER BLOCK POWER BLOCKTHIS IS REVERSE PATTERN Only for training and service purposesOnly for training and service purposes Don’t Connect Power At VDDIeMMC I/F HYNIXEMMC2GBCopyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposesPlace Near Micom LGE Internal Use OnlyPage 2012 LED/LCD TV Engineering guide Applicable Model XXLM760S-ZBOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedInstruction of new sub ass’ys How to use tool Download CONTENTNew features Main PCBs Block Diagrams, IIC Map Adjust way of new features widevine… Repair guideEPI Interface EPIEmbedded Point-Point Interface FeaturesMerits Comparison EPI Interface mini-LVDS vs. EPIHF mini-LVDS TCON What to changeEPI Interface mini-LVDS vs. EPI HF mini-LVDSOnly for training and service purposes Main PCB for BroadbandWIFI xxLM760S-ZBSide MTK5369 Block Diagram LM76Power load RearMain SoC MTK Jack InterfaceOnly for training and service purposes Full Scart18 Pin GenderR 47옴 GP4 Backend block diagram EPI & T-conOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedEPI CH4/5/6 GP4 Backend block diagram EPI & T-ConEPI CH1/2/3 Only for training and service purposesOnly for training and service purposes GP4 Backend block diagram LVDS Tx & Local DimmingLVDS Tx Block Dual-link LVDS OutputCables InterconnectionPCBs xxLM760S-ZA2012Y IR + Soft touch PCB Pinmap Circuit Block DiagramAss’y Picture Pin Configuration KEY1, KEY2 Voltage2012Y 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 Copyright 2012 LG Electronics. Inc. All rights reserved Introductions of 12Y RF ass’y + Magic Remote controlOnly for training and service purposes LGE Internal Use OnlyPairing Information Transmission Sequence 1. System™ Pairing Information Transmission Send to TV after Paired ™ Motion Data Transmissionmute powerpower homePower Management 3. M4 Block DiagramAA x 2 Battery ConnectorManufacturer 4. Function list주요 Item FunctionMethod 5. RF Pairing / Un-pairing MethodDescription Copyright 2012 LG Electronics. Inc. All rights reserved Introductions of 12Y WIFI built in ass’yOnly for training and service purposes LGE Internal Use OnlyPin map WIFI Built in ass’y featureLGITBlock diagram WIFI built in featureCopyright 2012 LG Electronics. Inc. All rights reserved WIFI Built in Block-diagramArcadyanOnly for training and service purposes LGE Internal Use OnlyCopyright 2012 LG Electronics. Inc. All rights reserved WIFI Built in ass’y SpecificationOnly for training and service purposes LGE Internal Use OnlyOnly for training and service purposes 12Y Widevine & HDCP 2.0 & NETFLX1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM Copyright 2012 LG Electronics. Inc. All rights reserved1. Widevine? ‰ Why HDCP2.0? 2. HDCP 2.0 & NETFLIX?‰ Netflix ‰ HDCP3. DTCP? Current 4. Changed BOMAs-Was Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposes4. Changed BOM LGE Internal Use OnlyContents of LCD TV Standard Repair Process Content Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom PageCheck Power Board 12v,3.5v etc Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D CableA2 Check Power Board 24v output Replace T-con Board or module And Adjust VCOMStandard Repair Process Check various voltages of Power BoardOnly for training and service purposes dateCheck Check RF Signal levelS/W Version Check RF Signal level Check S/W VersionColor error? Color error?Color error? A10/ A11Replace Main B/D adjust VCOM External device screen error-Color errorVertical/Horizontal bar, residual image, light spot External Input error Component error RGB error HDMI DVICheck Power On ‘”High” Check Power LEDPower LED Y On? Measure voltage of each output of Power B/DIf Power Off mode is not displayed Check Power B/D voltage Error?Check Power Off Mode Power off ListStandard Repair Process of Power BoardOnly for training and service purposes datedate In case of External Input signal error Check and fix external deviceStandard Repair Process Check audio B+ VoltageCheck 3.5v on Power B/D Replace Power B/D or Replace Main B/D Check & Repair Cable connection Connector solderCheck IR Output signal Power B/D don’t have problemOnly for training and service purposes Recognition errorRecognition error Standard Repair ProcessIdentify nose type F. Exterior defect Adjust VCOMLCD TV Content Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom PageStandard Repair Process Detail Technical Manual ALL MODELSEdge LED 24 Pin Power Board ↔ Main BoardStandard Repair Process Detail Technical Manual SMAW200-H24S YEONHOALL MODELS Only for training and service purposesStandard Repair Process Detail Technical Manual dateStandard Repair Process Detail Technical Manual 1. Checking method for remote controller for adjustmentOnly for training and service purposes ALL MODELSALL MODELS Only for training and service purposesStandard Repair Process Detail Technical Manual dateALL 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 Fuse Open, Abnormal power section Abnormal Power SectionAbnormal Power Section Only for training and service purposesNo Light Appendix Exchange PSULED driverOnly for training and service purposes Dim LightOnly for training and service purposes Appendix Exchange the ModuleUn-repairable Cases In this case please exchange the module Copyright 2012 LG Electronics. Inc. All rights reservedAppendix Exchange the Module Un-repairable Cases In this case please exchange the moduledate Only for training and service purposesStandard Repair Process Detail Technical Manual dateFor ’10 models, there is no voltage out for st-by purpose When st-by, only 3.5V is normally onStandard Repair Process Detail Technical Manual Edge LED Edge LEDEdge LED Edge LED Check “power on” pin is highStandard Repair Process Detail Technical Manual SMAW200-H24S YEONHOStandard Repair Process Detail Technical Manual B. Power error Off when on, off whiling viewingOnly for training and service purposes ALL MODELSALL MODELS Only for training and service purposesStandard Repair Process Detail Technical Manual dateStandard Repair Process Detail Technical Manual ALL MODELSStandard Repair Process Detail Technical Manual ALL MODELSStandard Repair Process Detail Technical Manual LCD module change T-Con board change