Manuals / LG Electronics / TV and Video / Flat Panel Television

LG Electronics 47LM765S/765T Standard Repair Process, date, Check user menu Speaker off, Normal

Models: 47LM760S/760T-ZB 47LM761S/761T-ZA MFL67360901 47LM761S/761T 47LM765S/765T 47LM765S/765T-ZD

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Standard Repair Process

	Error	C. Audio error	Established	2010. 12 .14
LCD TV	Error	C. Audio error	date	2010. 12 .14
LCD TV	symptom	No audio/ Normal video	Revised date		8/13
		No audio/ Normal video	Revised date		8/13

No audio Screen normal

☞A24

Check user menu > Speaker off

Off

Cancel OFF

☞A25

Check audio B+ 24V	Normal	Y
of Power Board	Normal
of Power Board	voltage
	voltage

Replace Power Board and repair parts

	Check Speaker	N
	Check Speaker	Disconnection
	disconnection	Disconnection
	disconnection

Replace Speaker

Replace MAIN Board

End

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

Page 92

Image 92

LG Electronics 47LM765S/765T Standard Repair Process, date, Check user menu Speaker off, Check audio B+, Normal, voltage

Contents

MODEL 47LM760S/760T 47LM760S/760T-ZB SERVICE MANUALLED LCD TV 47LM761S/761T 47LM761S/761T-ZA 47LM765S/765T 47LM765S/765T-ZDCONTENTS Only for training and service purposesCopyright LG Electronics. Inc. All rights reservedSAFETY PRECAUTIONS IMPORTANT SAFETY NOTICEBefore returning the receiver to the customer Leakage Current Cold CheckAntenna Cold CheckSERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesIC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement RemovalSPECIFICATION 4. Model General Specification1. Application range 2. Requirement for TestSpecification Symbolrate4.0Msymbols/s to 7.2Msymbols/s symbolrate5. Component Video Input Y, Cb/Pb, Cr/Pr 6. RGB input PC7. HDMI Input 7.1. DTV mode 7.2. PC modeADJUSTMENT INSTRUCTION 3. Automatic Adjustment1. Application Range 2. Designation3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L 3.4. LAN PORT INSPECTIONPING TESTSET PC 3.3. LAN3.7. WIFI MAC ADDRESS CHECK 3.5. Model name & Serial number Download3.6. CI+ Key checking method 3.5.1. Model name & Serial number D/L4. Manual Adjustment 4.1.1. Overview4.1.2. Equipment 4.1.3. Download method4.2. White Balance Adjustment 4.2.4. Adj. Command Protocol4.2.1. Overview 4.2.2. Equipment4.5. Magic Motion Remote control test 4.3. EYE-Q function check4.4. Local Dimming Function Check 4.2.7. LED White balance table4.7. Wi-Fi Test 4.6. 3D function test4.8. LNB voltage and 22KHz tone check 4.9. Option selection per country4.12. GND and Internal Pressure check 6. USB S/W DownloadService only5. Audio BLOCK DIAGRAM SideRear HDMIEXPLODED VIEW EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22 NVRAMX-TAL JTAG 10KOnly for training and service purposes PLACE AT JACK SIDEPlace at JACK SIDE PLACE AT JACK SIDESMD Gaskit Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyPLACE AT JACK SIDE PLACE AT MAIN SOC SIDEPLACE AT IC6000 Only for training and service purposesOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedLGE Internal Use Only IC701 H5TQ2G63BFR-PBCLGE Internal Use Only Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved FROM LIPS & POWER B/D PowerDETPANELPOWER On-semiRenesas MICOM For DebugMICOM MODEL OPTION Eye Sensor OptionOnly for training and service purposes HDMI1UI HDMI3 HDMI4Only for training and service purposes RGB/ PC AUDIO/ SPDIFSPDIF OUT PC AUDIOOnly for training and service purposes ESD for MTKCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes RS232CCVBS 1 PHONE JACK COMPONENT 1 PHONE JACKIR & KEY Zener Diode isclose to wafer Only for training and service purposesUSBWIFI +5VUSB FOR USB1USB1 USB2 MAX 1.5AOnly for training and service purposes Full Scart18 Pin GenderCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyZigBeeRadio Pulse MREMOTE OPTION ALL MREMOTE OPTIONOnly for training and service purposes AR4800Ethernet Block Only for training and service purposesESD for MTK ESD for LG1152Only for training and service purposes IC5800STA380BW GP4MT5369Only for training and service purposes SCART AUDIO MUTECopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyEARPHONE AMP Only for training and service purposesHEADPHONE AMP Copyright 2012 LG Electronics. Inc. All rights reservedOption FOR MTK Option FOR LG1152Only for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedT/C/S & H/NIM & T2/C TUNEREU & CHINA Only for training and service purposesVout=0.6*1+R1/R2 TU6500OptionLNB Only for training and service purposesDVB-S2 LNB Part Allegro DCDCGND and AGND are connectedAUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACK FOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12VFOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP Only for training and service purposesLVDS Only for training and service purposes51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector Copyright 2012 LG Electronics. Inc. All rights reservedLOCAL DIMMING Only for training and service purposesAR7600 1/16WPOWER BLOCK THIS IS REVERSE PATTERNLEVEL SHIFTER BLOCK Only for training and service purposesDon’t Connect Power At VDDI eMMC I/FOnly for training and service purposes HYNIXEMMC2GBOnly for training and service purposes Place Near MicomCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyPage Applicable Model XXLM760S-ZB Only for training and service purposes2012 LED/LCD TV Engineering guide Copyright 2012 LG Electronics. Inc. All rights reservedCONTENT 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 guideMerits EPIEmbedded Point-Point Interface FeaturesEPI Interface EPI Interface mini-LVDS vs. EPI HF mini-LVDS TCONComparison What to changeEPI Interface mini-LVDS vs. EPI HF mini-LVDSMain PCB for Broadband WIFIOnly for training and service purposes xxLM760S-ZBMTK5369 Block Diagram LM76 Power loadSide RearJack Interface Only for training and service purposesMain SoC MTK Full Scart18 Pin GenderGP4 Backend block diagram EPI & T-con Only for training and service purposesR 47옴 Copyright 2012 LG Electronics. Inc. All rights reservedGP4 Backend block diagram EPI & T-Con EPI CH1/2/3EPI CH4/5/6 Only for training and service purposesGP4 Backend block diagram LVDS Tx & Local Dimming LVDS Tx BlockOnly for training and service purposes Dual-link LVDS OutputInterconnection PCBsCables xxLM760S-ZACircuit Block Diagram Ass’y Picture Pin Configuration2012Y IR + Soft touch PCB Pinmap KEY1, KEY2 VoltageSpec 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 Introductions of GP4 Sensor Touch IC Touch EEPROM Register change with USB portAddr Value Introductions of 12Y RF ass’y + Magic Remote control Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use Only1. System ™ Pairing Information Transmission Send to TV after PairedPairing Information Transmission Sequence ™ Motion Data Transmissionpower powermute home3. M4 Block Diagram AA x 2 BatteryPower Management Connector4. Function list 주요 ItemManufacturer FunctionDescription 5. RF Pairing / Un-pairing MethodMethod Introductions of 12Y WIFI built in ass’y Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyWIFI Built in ass’y featureLGIT Block diagramPin map WIFI built in featureWIFI Built in Block-diagramArcadyan Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyWIFI Built in ass’y Specification Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use Only12Y Widevine & HDCP 2.0 & NETFLX 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOMOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reserved1. Widevine? 2. HDCP 2.0 & NETFLIX? ‰ Netflix‰ Why HDCP2.0? ‰ HDCP3. DTCP? 4. Changed BOM As-WasCurrent Only for training and service purposesOnly for training and service purposes 4. Changed BOMCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyContents of LCD TV Standard Repair Process Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptomContent PageMain 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 VCOMCheck various voltages of Power Board Only for training and service purposesStandard Repair Process dateS/W Version Check RF Signal levelCheck Check RF Signal level Check S/W VersionColor error? Color error?Color error? A10/ A11External 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 DVICheck Power LED Power LED Y On?Check Power On ‘”High” Measure voltage of each output of Power B/DError? Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage Power off Listof Power Board Only for training and service purposesStandard Repair Process dateIn case of External Input signal error Check and fix external device Standard Repair Processdate Check audio B+ VoltageCheck & 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 problemRecognition error Recognition errorOnly for training and service purposes Standard Repair ProcessIdentify nose type LCD TV Adjust VCOMF. Exterior defect Contents of LCD TV Standard Repair Process Detail Technical Manual Error symptomContent PageStandard Repair Process Detail Technical Manual ALL MODELS24 Pin Power Board ↔ Main Board Standard Repair Process Detail Technical ManualEdge LED SMAW200-H24S YEONHOOnly for training and service purposes Standard Repair Process Detail Technical ManualALL MODELS date1. Checking method for remote controller for adjustment Only for training and service purposesStandard Repair Process Detail Technical Manual ALL MODELSOnly for training and service purposes Standard Repair Process Detail Technical ManualALL MODELS dateChecking method Standard Repair Process Detail Technical ManualALL MODELS Only for training and service purposes Standard Repair Process Detail Technical Manualdate dateAppendix Exchange T-Con Board Abnormal Power Section Abnormal Power SectionFuse Open, Abnormal power section Only for training and service purposesAppendix Exchange PSULED driver Only for training and service purposesNo Light Dim LightAppendix Exchange the Module Un-repairable Cases In this case please exchange the moduleOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedAppendix Exchange the Module Un-repairable Cases In this case please exchange the moduleOnly for training and service purposes Standard Repair Process Detail Technical Manualdate dateWhen st-by, only 3.5V is normally on Standard Repair Process Detail Technical ManualFor ’10 models, there is no voltage out for st-by purpose Edge LED Edge LEDCheck “power on” pin is high Standard Repair Process Detail Technical ManualEdge LED Edge LED SMAW200-H24S YEONHOB. Power error Off when on, off whiling viewing Only for training and service purposesStandard Repair Process Detail Technical Manual ALL MODELSOnly for training and service purposes Standard Repair Process Detail Technical ManualALL MODELS 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

Check user menu > Speaker off

Check audio B+ 24V

Normal

of Power Board

voltage

Disconnection