F. Exterior defect, Lcd Tv, Adjust VCOM

Standard Repair Process
	Error	F. Exterior defect		Established	2010. 12 .14
LCD TV	Error	F. Exterior defect		date	2010. 12 .14
LCD TV	symptom		Exterior defect	Revised date	13/13
			Exterior defect	Revised date	13/13
	Zoom part with	Module	Replace module	Adjust VCOM
	exterior damage	damage	Replace module	Adjust VCOM
	exterior damage	damage		☞A28
				☞A28
		Cabinet	Replace cabinet
		damage	Replace cabinet
		damage
		Remote
		controller	Replace remote controller
		damage
		Stand	Replace stand
		dent	Replace stand
		dent

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

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Image 97

LG Electronics 32LM640S/640T-ZA service manual F. Exterior defect, Lcd Tv, Adjust VCOM

Contents

32LM640S/640T-ZA MODEL 32LM640S/640TSERVICE MANUAL LED LCD TV Only for training and service purposes CONTENTSCopyright LG Electronics. Inc. All rights reserved IMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSBefore returning the receiver to the customer Leakage Current Cold CheckAntenna Cold Check Electrostatically Sensitive ES Devices SERVICING PRECAUTIONS Replacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal 4. Model General Specification SPECIFICATION1. Application range 2. Requirement for Test 4.0Msymbols/s to 7.2Msymbols/s Symbolratesymbolrate DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s 6. RGB input PC 5. Component Video Input Y, Cb/Pb, Cr/Pr 7.2. PC mode 7. HDMI Input 7.1. DTV mode 3. Automatic Adjustment ADJUSTMENT INSTRUCTION1. Application Range 2. Designation 3.4. LAN PORT INSPECTIONPING TEST 3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/LSET PC 3.3. LAN 3.5. Model name & Serial number Download 3.7. WIFI MAC ADDRESS CHECK3.6. CI+ Key checking method 3.5.1. Model name & Serial number D/L 4.1.1. Overview 4. Manual Adjustment4.1.2. Equipment 4.1.3. Download method 4.2.4. Adj. Command Protocol 4.2. White Balance Adjustment4.2.1. Overview 4.2.2. Equipment 4.3. EYE-Q function check 4.5. Magic Motion Remote control test4.4. Local Dimming Function Check 4.2.7. LED White balance table 4.6. 3D function test 4.7. Wi-Fi Test4.8. LNB voltage and 22KHz tone check 4.9. Option selection per country 5. Audio 6. USB S/W DownloadService only4.12. GND and Internal Pressure check Side BLOCK DIAGRAMRear HDMI IMPORTANT SAFETY NOTICE EXPLODED VIEW NVRAM EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22X-TAL JTAG 10K Place at JACK SIDE PLACE AT JACK SIDEPLACE AT JACK SIDE 12.5TGASKITSMDUSB1 SMD Gaskit12.5TGASKITSMDUSB3 PLACE AT MAIN SOC SIDE PLACE AT JACK SIDEPLACE AT IC6000 IC703 IC701 H5TQ2G63BFR-PBCH5TQ2G63BFR-PBC IC105 LGE2112 Copyright 2012 LG Electronics. Inc. All rights reserved PowerDET FROM LIPS & POWER B/DPANELPOWER On-semi For Debug Renesas MICOMMICOM MODEL OPTION Eye Sensor Option UI HDMI3 HDMI1HDMI4 UI HDMI2 SPDIF OUT RGB/ PC AUDIO/ SPDIFPC AUDIO JK3603 SLIM-15F-D-2 JACKCOMMON ESD for MTK CVBS 1 PHONE JACK RS232CCOMPONENT 1 PHONE JACK Zener Diode is IR & KEYclose to wafer RGB Sensor +5VUSB FOR USB1 USBWIFIUSB1 USB2 MAX 1.5A SCART GENDER Full Scart18 Pin Gender2011.10.26 ALL MREMOTE OPTION ZigBeeRadio Pulse MREMOTE OPTIONAR4800 1/16W Ethernet Block STA380BW IC5800GP4MT5369 2011.11.21 AUDOUT EU/CHINAHOTELOPT SCART AUDIO MUTEIC6000 A Z4580MTR-E1 HEADPHONE AMP EARPHONE AMP Option FOR LG1152 Option FOR MTK Vout=0.6*1+R1/R2 T/C/S & H/NIM & T2/C TUNEREU & CHINATU6500 TU6501 DVB-S2 LNB Part Allegro OptionLNBDCDCGND and AGND are connected DCDCGND and AGND are connected in pin#27 FOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACKFOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP COMMERCIALOPTION 51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector LVDSLVDSHIGHMID 2011.08.11 AR7600 LOCAL DIMMINGL/DIMOUT THIS IS REVERSE PATTERN POWER BLOCKLEVEL SHIFTER BLOCK T-Con eMMC I/F Don’t Connect Power At VDDIHYNIXEMMC2GB Just Interal LDO Capacitor LOGOLIGHT R8901 10K Place Near MicomPage 2012 LED/LCD TV Engineering guide Applicable Model XXLM760S-ZB New features Main PCBs Block Diagrams, IIC Map CONTENTInstruction of new sub ass’ys How to use tool Download Adjust way of new features widevine… Repair guide EPI Interface EPIEmbedded Point-Point Interface FeaturesMerits HF mini-LVDS TCON EPI Interface mini-LVDS vs. EPIComparison What to change HF mini-LVDS WIFI Main PCB for BroadbandxxLM760S-ZB Chassis LD22E PCB P/No EAX64307905 Power load MTK5369 Block Diagram LM76Side Rear Main SoC MTK Jack InterfaceFull Scart18 Pin Gender IC6100 R 47옴 GP4 Backend block diagram EPI & T-conR0 옴 EPI CH1/2/3 GP4 Backend block diagram EPI & T-ConEPI CH4/5/6 50Pin LVDS Tx Block GP4 Backend block diagram LVDS Tx & Local DimmingDual-link LVDS Output LVDSSEL “H”=JEIDA, “L” or NC=VESA LGD PCBs InterconnectionCables xxLM760S-ZA Ass’y Picture Pin Configuration Circuit Block Diagram2012Y IR + Soft touch PCB Pinmap KEY1, KEY2 Voltage 2012Y 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 port Introductions of 12Y RF ass’y + Magic Remote control ™ Pairing Information Transmission Send to TV after Paired 1. SystemPairing Information Transmission Sequence ™ Motion Data Transmission mute powerhome ← ok → AA x 2 Battery 3. M4 Block DiagramPower Management Connector 주요 Item 4. Function listManufacturer Function Method 5. RF Pairing / Un-pairing MethodDescription Introductions of 12Y WIFI built in ass’y Block diagram WIFI Built in ass’y featureLGITPin map WIFI built in feature WIFI Built in Block-diagramArcadyan WIFI Built in ass’y Specification 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM 12Y Widevine & HDCP 2.0 & NETFLX 1. Widevine? ‰ Netflix 2. HDCP 2.0 & NETFLIX?‰ Why HDCP2.0? ‰ HDCP 3. DTCP? As-Was 4. Changed BOMCurrent Æ 추가 4. Changed BOM Contents of LCD TV Standard Repair Process Error symptom Contents of LCD TV Standard Repair Process Detail Technical ManualContent Page A2 Check Power Board 24v output Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D CableCheck Power Board 12v,3.5v etc Replace T-con Board or module And Adjust VCOM Revised date Check various voltages of Power Board3.5V,12V,20V or 24V… Normal Y voltage? Check Check RF Signal levelS/W Version Check S/W Version A10/ A11 Color error?Check color by input -External Input COMPONENT -RGB ※ Check and Vertical/Horizontal bar, residual image, light spot External device screen error-Color errorReplace Main B/D adjust VCOM External Input error Component error RGB error HDMI DVI Power LED Y On? Check Power LEDCheck Power On ‘”High” Measure voltage of each output of Power B/D Check Power Off Mode Error?If Power Off mode is not displayed Check Power B/D voltage Power off List Check user menu Speaker off of Power BoardCheck audio B+ Normal Check audio B+ Voltage In case of External Input signal error Check and fix external device Check IR Output signal Check & Repair Cable connection Connector solderCheck 3.5v on Power B/D Replace Power B/D or Replace Main B/D Power B/D don’t have problem External Input and Recognition erroraccordance Identify nose type F. Exterior defect Adjust VCOM Error symptom ALL MODELS Standard Repair Process Detail Technical Manual Edge LED 24 Pin Power Board ↔ Main BoardSMAW200-H24S YEONHO Standard Repair Process Detail Technical Manual 1. Checking method for remote controller for adjustment Standard Repair Process Detail Technical Manual Checking method Standard Repair Process Detail Technical Manual Appendix Exchange T-Con Board Abnormal Display Fuse Open, Abnormal power sectionGRADATION Noise No Light Appendix Exchange PSULED driverDim Light No picture/Sound Ok Un-repairable Cases In this case please exchange the module Appendix Exchange the Module Un-repairable Cases In this case please exchange the module Appendix Exchange the Module Standard Repair Process Detail Technical Manual For ’10 models, there is no voltage out for st-by purpose When st-by, only 3.5V is normally onEdge LED Edge LED Check “power on” pin is high B. Power error Off when on, off whiling viewing Standard Repair Process Detail Technical Manual Only for training and service purposesALL MODELS date ALL MODELS Standard Repair Process Detail Technical Manual ALL MODELS LCD module change T-Con board change