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

LG Electronics MFL67360901 Standard Repair Process, date, Check Power LED, Power LED Y On?

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

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Standard Repair Process

	Error	B. Power error	Established	2010. 12 .14
LCD TV	Error	B. Power error	date	2010. 12 .14
LCD TV	symptom	No power	Revised date		6/13
		No power	Revised date		6/13

☞A17

☞A19

Check

Power LED

. Stand-By: Red

. Operating: white

Power LED Y

On?

Check Power cord was inserted properly

DC Power on

by pressing Power Key On Remote control

Normal N operation?

☞A4

Check Power On ‘”High”

Y Replace

OK? Power

B/D

Replace Main B/D

Normal?

Measure voltage of each output of Power B/D

※

Check ST-BY 3.5V

☞A18

Normal

voltage?

Replace Power B/D

Normal Y voltage?

Replace Power B/D

Replace Main B/D

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

Page 90

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LG Electronics MFL67360901 Standard Repair Process, date, Check Power LED, Power LED Y On?, Normal N operation?, Normal?

Contents

LED LCD TV MODEL 47LM760S/760T 47LM760S/760T-ZBSERVICE MANUAL 47LM761S/761T 47LM761S/761T-ZA 47LM765S/765T 47LM765S/765T-ZD Copyright CONTENTSOnly for training and service purposes LG Electronics. Inc. All rights reserved Before returning the receiver to the customer SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE Leakage Current Cold CheckAntenna Cold Check SERVICING PRECAUTIONS Electrostatically Sensitive ES Devices Small-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal 1. Application range SPECIFICATION4. Model General Specification 2. Requirement for Test symbolrate Symbolrate4.0Msymbols/s to 7.2Msymbols/s 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 1. Application Range ADJUSTMENT INSTRUCTION3. Automatic Adjustment 2. Designation SET 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. LAN 3.6. CI+ Key checking method 3.7. WIFI MAC ADDRESS CHECK3.5. Model name & Serial number Download 3.5.1. Model name & Serial number D/L 4.1.2. Equipment 4. Manual Adjustment4.1.1. Overview 4.1.3. Download method 4.2.1. Overview 4.2. White Balance Adjustment4.2.4. Adj. Command Protocol 4.2.2. Equipment 4.4. Local Dimming Function Check 4.5. Magic Motion Remote control test4.3. EYE-Q function check 4.2.7. LED White balance table 4.8. LNB voltage and 22KHz tone check 4.7. Wi-Fi Test4.6. 3D function test 4.9. Option selection per country 6. USB S/W DownloadService only 5. Audio4.12. GND and Internal Pressure check Rear BLOCK DIAGRAMSide HDMI EXPLODED VIEW X-TAL EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22NVRAM JTAG 10K PLACE AT JACK SIDE Place at JACK SIDEPLACE AT JACK SIDE SMD Gaskit 12.5TGASKITSMDUSB112.5TGASKITSMDUSB3 PLACE AT JACK SIDE PLACE AT MAIN SOC SIDEPLACE AT IC6000 H5TQ2G63BFR-PBC IC701 H5TQ2G63BFR-PBCIC703 IC105 LGE2112 Only for training and service purposes PANELPOWER FROM LIPS & POWER B/DPowerDET On-semi MICOM MODEL OPTION Renesas MICOMFor Debug Eye Sensor Option HDMI4 HDMI1UI HDMI3 UI HDMI2 PC AUDIO RGB/ PC AUDIO/ SPDIFSPDIF OUT JK3603 SLIM-15F-D-2 ESD for MTK JACKCOMMON RS232C CVBS 1 PHONE JACKCOMPONENT 1 PHONE JACK close to wafer IR & KEYZener Diode is RGB Sensor USB1 USBWIFI+5VUSB FOR USB1 USB2 MAX 1.5A Full Scart18 Pin Gender SCART GENDER2011.10.26 AR4800 ZigBeeRadio Pulse MREMOTE OPTIONALL MREMOTE OPTION 1/16W Ethernet Block GP4MT5369 IC5800STA380BW 2011.11.21 IC6000 SCART AUDIO MUTEAUDOUT EU/CHINAHOTELOPT A Z4580MTR-E1 EARPHONE AMP HEADPHONE AMP Option FOR MTK Option FOR LG1152 TU6500 T/C/S & H/NIM & T2/C TUNEREU & CHINAVout=0.6*1+R1/R2 TU6501 DCDCGND and AGND are connected OptionLNBDVB-S2 LNB Part Allegro DCDCGND and AGND are connected in pin#27 FOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACKFOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V COMMERCIALOPTION LVDSHIGHMID LVDS51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector 2011.08.11 LOCAL DIMMING AR7600L/DIMOUT LEVEL SHIFTER BLOCK POWER BLOCKTHIS IS REVERSE PATTERN T-Con HYNIXEMMC2GB Don’t Connect Power At VDDIeMMC I/F Just Interal LDO Capacitor Place Near Micom LOGOLIGHT R8901 10KPage Applicable Model XXLM760S-ZB 2012 LED/LCD TV Engineering guide Instruction 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 guide EPIEmbedded Point-Point Interface Features EPI InterfaceMerits Comparison EPI Interface mini-LVDS vs. EPIHF mini-LVDS TCON What to change HF mini-LVDS xxLM760S-ZB Main PCB for BroadbandWIFI Chassis LD22E PCB P/No EAX64307905 Side MTK5369 Block Diagram LM76Power load Rear Full Scart18 Pin Gender Jack InterfaceMain SoC MTK IC6100 GP4 Backend block diagram EPI & T-con R 47옴R0 옴 EPI CH4/5/6 GP4 Backend block diagram EPI & T-ConEPI CH1/2/3 50Pin Dual-link LVDS Output GP4 Backend block diagram LVDS Tx & Local DimmingLVDS Tx Block LVDSSEL “H”=JEIDA, “L” or NC=VESA LGD Cables InterconnectionPCBs xxLM760S-ZA 2012Y IR + Soft touch PCB Pinmap Circuit Block DiagramAss’y Picture Pin Configuration KEY1, KEY2 Voltage Power LED Scenario 2012Y IR + Soft Touch LED Lighting ScenarioSpec 내용 Introductions of GP4 Sensor Touch IC Manual of Touch SensitivityTouch Key Threshold Level Ta = 25ºC Touch EEPROM Register change with USB port Addr Value Introductions of 12Y RF ass’y + Magic Remote control Pairing Information Transmission Sequence 1. System™ Pairing Information Transmission Send to TV after Paired ™ Motion Data Transmission home powermute ← ok → Power Management 3. M4 Block DiagramAA x 2 Battery Connector Manufacturer 4. Function list주요 Item Function 5. RF Pairing / Un-pairing Method MethodDescription Introductions of 12Y WIFI built in ass’y Pin map WIFI Built in ass’y featureLGITBlock diagram 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? ‰ Why HDCP2.0? 2. HDCP 2.0 & NETFLIX?‰ Netflix ‰ HDCP 3. DTCP? Current 4. Changed BOMAs-Was Æ 추가 Copyright 2012 LG Electronics. Inc. All rights reserved Contents of LCD TV Standard Repair Process Content Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom Page Check 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 VCOM 3.5V,12V,20V or 24V… Check various voltages of Power BoardRevised date Normal Y voltage? Check RF Signal level CheckS/W Version Check S/W Version Check color by input -External Input COMPONENT -RGB Color error?A10/ A11 ※ Check and Replace 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 DVI Check Power On ‘”High” Check Power LEDPower LED Y On? Measure voltage of each output of Power B/D If Power Off mode is not displayed Check Power B/D voltage Error?Check Power Off Mode Power off List Check audio B+ of Power BoardCheck user menu Speaker off Normal In case of External Input signal error Check and fix external device Check audio B+ Voltage Check 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 problem Recognition error External Input andaccordance Identify nose type Adjust VCOM F. Exterior defect Content Standard Repair Process Detail Technical Manual ALL MODELS 24 Pin Power Board ↔ Main Board Edge LEDSMAW200-H24S YEONHO ALL MODELS 1. Checking method for remote controller for adjustment ALL MODELS Checking method date Appendix Exchange T-Con Board GRADATION Fuse Open, Abnormal power sectionAbnormal Display Noise Dim Light Appendix Exchange PSULED driverNo 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 date When st-by, only 3.5V is normally on For ’10 models, there is no voltage out for st-by purposeEdge LED Edge LED Check “power on” pin is high B. Power error Off when on, off whiling viewing ALL MODELS Only for training and service purposesStandard Repair Process Detail Technical Manual date Standard Repair Process Detail Technical Manual ALL MODELS Standard Repair Process Detail Technical Manual LCD module change T-Con board change