LG Electronics 47LM765S/765T Contents of LCD TV Standard Repair Process Detail Technical Manual

Page 98
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Contents of LCD TV Standard Repair Process Detail Technical Manual

Continued from previous page

No.

Error symptom

Content

Page

Remarks

 

 

 

 

 

21

 

Check front display LED

A17

 

 

 

 

 

 

22

 

Check power input Voltage & ST-BY 5V

A18

 

 

 

 

 

 

23

B. Power error_No power

Checking method when power is ON

A19

 

 

 

 

 

 

24

 

POWER BOARD voltage measuring method

A4

 

 

 

 

 

 

25

 

 

 

 

 

 

 

 

 

26

B. Power error_Off when on, off while

POWER OFF MODE checking method

A22

 

viewing

 

 

 

 

 

 

 

 

 

 

27

B. Power error_Off when on, off while

POWER BOARD PIN voltage checking method

A19

 

viewing

 

 

 

 

 

 

 

 

 

 

28

 

Checking method in menu when there is no

A24

 

 

audio

 

 

C. Audio error_No audio/Normal video

 

 

 

 

 

 

29

Voltage and speaker checking method when

A25

 

 

 

 

there is no audio

 

 

 

 

 

 

 

 

 

 

30

C. Audio error_Wrecked

Voltage and speaker checking method in

A25

 

audio/discontinuation

case of audio error

 

 

 

 

 

 

 

 

 

31

D. Function error_ No response in

Remote controller operation checking method

A27

 

remote controller, key error

 

 

 

 

 

 

 

 

 

 

32

D. VCOM Adjustment

Sequence of the Vcom adjustment

A28

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copyright © 2012 LG Electronics. Inc. All rights reserved.

LGE Internal Use Only

Only for training and service purposes

 

Page 97 Page 99
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Page 97 Page 99
Contents LED LCD TV MODEL 47LM760S/760T 47LM760S/760T-ZBSERVICE MANUAL 47LM761S/761T 47LM761S/761T-ZA 47LM765S/765T 47LM765S/765T-ZDCopyright CONTENTSOnly for training and service purposes LG Electronics. Inc. All rights reservedBefore returning the receiver to the customer SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE Leakage Current Cold CheckAntenna Cold CheckSERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesSmall-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal1. Application range SPECIFICATION4. Model General Specification 2. Requirement for Testsymbolrate Symbolrate4.0Msymbols/s to 7.2Msymbols/s DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s5. Component Video Input Y, Cb/Pb, Cr/Pr 6. RGB input PC7. HDMI Input 7.1. DTV mode 7.2. PC mode1. Application Range ADJUSTMENT INSTRUCTION3. Automatic Adjustment 2. DesignationSET 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. LAN3.6. CI+ Key checking method 3.7. WIFI MAC ADDRESS CHECK3.5. Model name & Serial number Download 3.5.1. Model name & Serial number D/L4.1.2. Equipment 4. Manual Adjustment4.1.1. Overview 4.1.3. Download method4.2.1. Overview 4.2. White Balance Adjustment4.2.4. Adj. Command Protocol 4.2.2. Equipment4.4. Local Dimming Function Check 4.5. Magic Motion Remote control test4.3. EYE-Q function check 4.2.7. LED White balance table4.8. LNB voltage and 22KHz tone check 4.7. Wi-Fi Test4.6. 3D function test 4.9. Option selection per country4.12. GND and Internal Pressure check 6. USB S/W DownloadService only5. Audio Rear BLOCK DIAGRAMSide HDMIEXPLODED VIEW X-TAL EAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22NVRAM JTAG 10KPLACE 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 H5TQ2G63BFR-PBC IC701 H5TQ2G63BFR-PBCIC703 IC105 LGE2112LGE Internal Use Only PANELPOWER FROM LIPS & POWER B/DPowerDET On-semiMICOM MODEL OPTION Renesas MICOMFor Debug Eye Sensor OptionHDMI4 HDMI1UI HDMI3 UI HDMI2PC AUDIO RGB/ PC AUDIO/ SPDIFSPDIF OUT JK3603 SLIM-15F-D-2ESD for MTK JACKCOMMONCOMPONENT 1 PHONE JACK RS232CCVBS 1 PHONE JACK close to wafer IR & KEYZener Diode is RGB SensorUSB1 USBWIFI+5VUSB FOR USB1 USB2 MAX 1.5A2011.10.26 Full Scart18 Pin GenderSCART GENDER AR4800 ZigBeeRadio Pulse MREMOTE OPTIONALL MREMOTE OPTION 1/16WEthernet Block GP4MT5369 IC5800STA380BW 2011.11.21IC6000 SCART AUDIO MUTEAUDOUT EU/CHINAHOTELOPT A Z4580MTR-E1EARPHONE AMP HEADPHONE AMPOption FOR MTK Option FOR LG1152TU6500 T/C/S & H/NIM & T2/C TUNEREU & CHINAVout=0.6*1+R1/R2 TU6501DCDCGND and AGND are connected OptionLNBDVB-S2 LNB Part Allegro DCDCGND and AGND are connected in pin#27FOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACKFOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12V COMMERCIALOPTIONLVDSHIGHMID LVDS51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT Connector 2011.08.11L/DIMOUT LOCAL DIMMINGAR7600 LEVEL SHIFTER BLOCK POWER BLOCKTHIS IS REVERSE PATTERN T-ConHYNIXEMMC2GB Don’t Connect Power At VDDIeMMC I/F Just Interal LDO CapacitorPlace Near Micom LOGOLIGHT R8901 10KPage Applicable Model XXLM760S-ZB 2012 LED/LCD TV Engineering guideInstruction 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 guideMerits EPIEmbedded Point-Point Interface FeaturesEPI Interface Comparison EPI Interface mini-LVDS vs. EPIHF mini-LVDS TCON What to changeHF mini-LVDS xxLM760S-ZB Main PCB for BroadbandWIFI Chassis LD22E PCB P/No EAX64307905Side MTK5369 Block Diagram LM76Power load RearFull Scart18 Pin Gender Jack InterfaceMain SoC MTK IC6100R0 옴 GP4 Backend block diagram EPI & T-conR 47옴 EPI CH4/5/6 GP4 Backend block diagram EPI & T-ConEPI CH1/2/3 50PinDual-link LVDS Output GP4 Backend block diagram LVDS Tx & Local DimmingLVDS Tx Block LVDSSEL “H”=JEIDA, “L” or NC=VESA LGDCables InterconnectionPCBs xxLM760S-ZA2012Y IR + Soft touch PCB Pinmap Circuit Block DiagramAss’y Picture Pin Configuration 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 Touch EEPROM Register change with USB port Addr ValueIntroductions of 12Y RF ass’y + Magic Remote control Pairing Information Transmission Sequence 1. System™ Pairing Information Transmission Send to TV after Paired ™ Motion Data Transmissionhome powermute ← ok →Power Management 3. M4 Block DiagramAA x 2 Battery ConnectorManufacturer 4. Function list주요 Item FunctionDescription 5. RF Pairing / Un-pairing MethodMethod Introductions of 12Y WIFI built in ass’y Pin map WIFI Built in ass’y featureLGITBlock diagram WIFI built in featureWIFI 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 BOM1. Widevine? ‰ Why HDCP2.0? 2. HDCP 2.0 & NETFLIX?‰ Netflix ‰ HDCP3. DTCP? Current 4. Changed BOMAs-Was Æ 추가Copyright 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 PageCheck 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 VCOM3.5V,12V,20V or 24V… Check various voltages of Power BoardRevised date Normal Y voltage?S/W Version Check RF Signal levelCheck Check S/W Version Check color by input -External Input COMPONENT -RGB Color error?A10/ A11 ※ Check andReplace 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 DVICheck Power On ‘”High” Check Power LEDPower LED Y On? Measure voltage of each output of Power B/DIf Power Off mode is not displayed Check Power B/D voltage Error?Check Power Off Mode Power off ListCheck audio B+ of Power BoardCheck user menu Speaker off NormalIn case of External Input signal error Check and fix external device Check audio B+ VoltageCheck 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 problemaccordance Recognition errorExternal Input and Identify nose type Adjust VCOM F. Exterior defectContent Standard Repair Process Detail Technical Manual ALL MODELSSMAW200-H24S YEONHO 24 Pin Power Board ↔ Main BoardEdge LED 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 NoiseDim Light Appendix Exchange PSULED driverNo Light No picture/Sound OkAppendix Exchange the Module Un-repairable Cases In this case please exchange the moduleAppendix Exchange the Module Un-repairable Cases In this case please exchange the moduledate 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 ALL MODELS Only for training and service purposesStandard Repair Process Detail Technical Manual dateStandard Repair Process Detail Technical Manual ALL MODELSStandard Repair Process Detail Technical Manual LCD module change T-Con board change
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