All Models, Checking method | LG Electronics 32LM640S/640T-ZA

Standard Repair Process Detail Technical Manual

LCD TV

Error	A. Video error_Video error, video lag/stop	Established	2010. 12 .14
symptom
		date
Content	TUNER checking part	Revised		A9
		date

Checking method:

1.Check the signal strength or check whether the screen is normal when the external device is connected.

2.After measuring each voltage from power supply, finally replace the MAIN BOARD.

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

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LG Electronics 32LM640S/640T-ZA service manual Standard Repair Process Detail Technical Manual, All Models, Checking method

Contents

MODEL 32LM640S/640T 32LM640S/640T-ZASERVICE MANUAL LED LCD TV CONTENTS Only for training and service purposesCopyright LG Electronics. Inc. All rights reserved SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICEBefore returning the receiver to the customer Leakage Current Cold CheckAntenna Cold Check SERVICING PRECAUTIONS Electrostatically Sensitive ES Devices IC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal SPECIFICATION 4. Model General Specification1. Application range 2. Requirement for Test Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s 5. Component Video Input Y, Cb/Pb, Cr/Pr 6. RGB input PC 7. HDMI Input 7.1. DTV mode 7.2. PC mode ADJUSTMENT INSTRUCTION 3. Automatic Adjustment1. Application Range 2. Designation 3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L 3.4. LAN PORT INSPECTIONPING TESTSET PC 3.3. LAN 3.7. WIFI MAC ADDRESS CHECK 3.5. Model name & Serial number Download3.6. CI+ Key checking method 3.5.1. Model name & Serial number D/L 4. Manual Adjustment 4.1.1. Overview4.1.2. Equipment 4.1.3. Download method 4.2. White Balance Adjustment 4.2.4. Adj. Command Protocol4.2.1. Overview 4.2.2. Equipment 4.5. Magic Motion Remote control test 4.3. EYE-Q function check4.4. Local Dimming Function Check 4.2.7. LED White balance table 4.7. Wi-Fi Test 4.6. 3D function test4.8. LNB voltage and 22KHz tone check 4.9. Option selection per country 4.12. GND and Internal Pressure check 6. USB S/W DownloadService only5. Audio BLOCK DIAGRAM SideRear HDMI EXPLODED VIEW IMPORTANT SAFETY NOTICE EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22 NVRAMX-TAL JTAG 10K PLACE AT JACK SIDE PLACE AT JACK SIDEPlace at JACK SIDE 12.5TGASKITSMDUSB3 SMD Gaskit12.5TGASKITSMDUSB1 PLACE AT IC6000 PLACE AT JACK SIDEPLACE AT MAIN SOC SIDE IC701 H5TQ2G63BFR-PBC IC703H5TQ2G63BFR-PBC IC105 LGE2112 LGE Internal Use Only FROM LIPS & POWER B/D PowerDETPANELPOWER On-semi Renesas MICOM For DebugMICOM MODEL OPTION Eye Sensor Option HDMI1 UI HDMI3HDMI4 UI HDMI2 RGB/ PC AUDIO/ SPDIF SPDIF OUTPC AUDIO JK3603 SLIM-15F-D-2 ESD for MTK JACKCOMMON COMPONENT 1 PHONE JACK RS232CCVBS 1 PHONE JACK IR & KEY Zener Diode isclose to wafer RGB Sensor USBWIFI +5VUSB FOR USB1USB1 USB2 MAX 1.5A 2011.10.26 Full Scart18 Pin GenderSCART GENDER ZigBeeRadio Pulse MREMOTE OPTION ALL MREMOTE OPTIONAR4800 1/16W Ethernet Block IC5800 STA380BWGP4MT5369 2011.11.21 SCART AUDIO MUTE AUDOUT EU/CHINAHOTELOPTIC6000 A Z4580MTR-E1 EARPHONE AMP HEADPHONE AMP Option FOR MTK Option FOR LG1152 T/C/S & H/NIM & T2/C TUNEREU & CHINA Vout=0.6*1+R1/R2TU6500 TU6501 OptionLNB DVB-S2 LNB Part AllegroDCDCGND and AGND are connected DCDCGND and AGND are connected in pin#27 AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACK FOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12VFOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP COMMERCIALOPTION LVDS 51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT ConnectorLVDSHIGHMID 2011.08.11 L/DIMOUT LOCAL DIMMINGAR7600 POWER BLOCK THIS IS REVERSE PATTERNLEVEL SHIFTER BLOCK T-Con Don’t Connect Power At VDDI eMMC I/FHYNIXEMMC2GB Just Interal LDO Capacitor Place Near Micom LOGOLIGHT R8901 10KPage Applicable Model XXLM760S-ZB 2012 LED/LCD TV Engineering guide CONTENT New features Main PCBs Block Diagrams, IIC MapInstruction of new sub ass’ys How to use tool Download Adjust way of new features widevine… Repair guide Merits EPIEmbedded Point-Point Interface FeaturesEPI Interface EPI Interface mini-LVDS vs. EPI HF mini-LVDS TCONComparison What to change HF mini-LVDS Main PCB for Broadband WIFIxxLM760S-ZB Chassis LD22E PCB P/No EAX64307905 MTK5369 Block Diagram LM76 Power loadSide Rear Jack Interface Main SoC MTKFull Scart18 Pin Gender IC6100 R0 옴 GP4 Backend block diagram EPI & T-conR 47옴 GP4 Backend block diagram EPI & T-Con EPI CH1/2/3EPI CH4/5/6 50Pin GP4 Backend block diagram LVDS Tx & Local Dimming LVDS Tx BlockDual-link LVDS Output LVDSSEL “H”=JEIDA, “L” or NC=VESA LGD Interconnection PCBsCables xxLM760S-ZA Circuit Block Diagram Ass’y Picture Pin Configuration2012Y IR + Soft touch PCB Pinmap KEY1, KEY2 Voltage Spec 내용 Power LED Scenario2012Y IR + Soft Touch LED Lighting Scenario Touch Key Threshold Level Ta = 25ºC Introductions of GP4 Sensor Touch ICManual of Touch Sensitivity Touch EEPROM Register change with USB port Addr Value Introductions of 12Y RF ass’y + Magic Remote control 1. System ™ Pairing Information Transmission Send to TV after PairedPairing Information Transmission Sequence ™ Motion Data Transmission power mutehome ← ok → 3. M4 Block Diagram AA x 2 BatteryPower Management Connector 4. Function list 주요 ItemManufacturer Function Description 5. RF Pairing / Un-pairing MethodMethod Introductions of 12Y WIFI built in ass’y WIFI Built in ass’y featureLGIT Block diagramPin map WIFI built in feature WIFI Built in Block-diagramArcadyan WIFI Built in ass’y Specification 12Y Widevine & HDCP 2.0 & NETFLX 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM 1. Widevine? 2. HDCP 2.0 & NETFLIX? ‰ Netflix‰ Why HDCP2.0? ‰ HDCP 3. DTCP? 4. Changed BOM As-WasCurrent Æ 추가 Only for training and service purposes Contents of LCD TV Standard Repair Process Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptomContent Page Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A2 Check Power Board 24v outputCheck Power Board 12v,3.5v etc Replace T-con Board or module And Adjust VCOM Check various voltages of Power Board Revised date3.5V,12V,20V or 24V… Normal Y voltage? S/W Version Check RF Signal levelCheck Check S/W Version Color error? A10/ A11Check color by input -External Input COMPONENT -RGB ※ Check and External device screen error-Color error Vertical/Horizontal bar, residual image, light spotReplace Main B/D adjust VCOM External Input error Component error RGB error HDMI DVI Check Power LED Power LED Y On?Check Power On ‘”High” Measure voltage of each output of Power B/D Error? Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage Power off List of Power Board Check user menu Speaker offCheck audio B+ Normal In case of External Input signal error Check and fix external device Check audio B+ Voltage Check & Repair Cable connection Connector solder Check IR Output signalCheck 3.5v on Power B/D Replace Power B/D or Replace Main B/D Power B/D don’t have problem accordance Recognition errorExternal Input and Identify nose type Adjust VCOM F. Exterior defect Contents of LCD TV Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual ALL MODELS SMAW200-H24S YEONHO 24 Pin Power Board ↔ Main BoardEdge LED Only for training and service purposes 1. Checking method for remote controller for adjustment Only for training and service purposes Checking method Only for training and service purposes Appendix Exchange T-Con Board Fuse Open, Abnormal power section Abnormal DisplayGRADATION Noise Appendix Exchange PSULED driver No LightDim Light No picture/Sound Ok Appendix Exchange the Module Un-repairable Cases In this case please exchange the module Appendix Exchange the Module Un-repairable Cases In this case please exchange the module Only for training and service purposes Edge LED Edge LED When st-by, only 3.5V is normally onFor ’10 models, there is no voltage out for st-by purpose Check “power on” pin is high B. Power error Off when on, off whiling viewing Only for training and service purposes Standard Repair Process Detail Technical ManualALL MODELS date Standard Repair Process Detail Technical Manual ALL MODELS Standard Repair Process Detail Technical Manual LCD module change T-Con board change

LG Electronics 32LM640S/640T-ZA Standard Repair Process Detail Technical Manual, All Models

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

Checking method: