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

LG Electronics 47LM761S/761T, MFL67360901 Check & Repair Cable connection Connector solder

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

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Standard Repair Process

	Error	D. General Function Problem	Established	2010. 12 .14
LCD TV	Error		date	2010. 12 .14
LCD TV	symptom	Remote control & Local switch checking	Revised date		10/13
		Remote control & Local switch checking	Revised date		10/13

1. Remote control(R/C) operating error

Replace

Check R/C itself

Operation

Normal Y operating?

☞A27

Check & Repair

Cable connection Connector solder

Normal N operating?

☞A27

Check B+ 3.5V

On Main B/D

☞A4

Normal Y Voltage?

☞A27

Check IR

Output signal

Main B/D

Normal Y

Signal?

Check R/C Operating

When turn off light in room

If R/C operate,

Explain the customer cause is interference from light in room.

Check & Replace

Baterry of R/C

Normal Close operating?

Replace R/C

Check 3.5v on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D don’t have problem)

Repair/Replace

IR B/D

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

Page 94

Image 94

LG Electronics 47LM761S/761T, MFL67360901 Check & Repair Cable connection Connector solder, Check B+ On Main B/D

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 5. Audio 6. USB S/W DownloadService only4.12. 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 12.5TGASKITSMDUSB1 SMD Gaskit12.5TGASKITSMDUSB3 PLACE AT MAIN SOC SIDE PLACE AT JACK SIDEPLACE AT IC6000 H5TQ2G63BFR-PBC IC701 H5TQ2G63BFR-PBCIC703 IC105 LGE2112 Copyright 2012 LG Electronics. Inc. All rights reserved 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 CVBS 1 PHONE JACK RS232CCOMPONENT 1 PHONE JACK close to wafer IR & KEYZener Diode is RGB Sensor USB1 USBWIFI+5VUSB FOR USB1 USB2 MAX 1.5A SCART GENDER Full Scart18 Pin 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 AR7600 LOCAL DIMMINGL/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 EPI Interface EPIEmbedded Point-Point Interface FeaturesMerits 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 R 47옴 GP4 Backend block diagram EPI & T-conR0 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 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 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 Method 5. RF Pairing / Un-pairing 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 Check RF Signal levelS/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 External Input and Recognition erroraccordance Identify nose type Adjust VCOM F. Exterior defect Content Standard Repair Process Detail Technical Manual ALL MODELS Edge LED 24 Pin Power Board ↔ Main BoardSMAW200-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 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 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