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

Page 116
Manual background

Standard Repair Process Detail Technical Manual

 

 

Error

C. Audio error_No audio/Normal video

Established

2010. 12 .14

 

 

 

LCD TV

symptom

 

 

 

 

date

 

 

 

 

Content

Voltage and speaker checking method

Revised

 

A25

 

 

 

 

 

 

 

when there is no audio

date

 

 

 

 

 

 

 

 

<ALL MODELS>

Manual backgroundManual background ②

②1

3

5

7

9

11

13

15

17

19

21

23

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S (YEONHO)

Power on

2

20V (24V)

20V (24V)

4

20V (24V)

GND

6

GND

GND

8

GND

3.5V

10

3.5V

3.5V

12

3.5V

GND

14

GND

GND

16

GND

12V

18

Inverter On/off

 

 

 

12V

20

Lamp : A-Dim

 

 

LED : N.C

12V

22

PWM Dim #1

 

 

 

GND/P_DIM2

24

Error-out

 

 

 

 

 

 

①Manual backgroundManual background

③

Checking order when there is no audio

①Check the contact condition of or 24V connector of Main Board

②Measure the 24V input voltage supplied from Power Board

(If there is no input voltage, remove and check the connector)

③Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal, the speaker is normal.

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

LGE Internal Use Only

Only for training and service purposes

 

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Contents MODEL 32LM640S/640T 32LM640S/640T-ZASERVICE MANUAL LED LCD TVCONTENTS 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 TestSymbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate 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 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 IMPORTANT SAFETY NOTICEEAX6430790* LD22* / LC22 EAX6443420* LT22* / LJ22* / LA22* / LB22 NVRAMX-TAL 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 IC701 H5TQ2G63BFR-PBC IC703H5TQ2G63BFR-PBC IC105 LGE2112LGE Internal Use Only FROM LIPS & POWER B/D PowerDETPANELPOWER On-semiRenesas MICOM For DebugMICOM MODEL OPTION Eye Sensor OptionHDMI1 UI HDMI3HDMI4 UI HDMI2RGB/ PC AUDIO/ SPDIF SPDIF OUTPC AUDIO JK3603 SLIM-15F-D-2ESD for MTK JACKCOMMONCOMPONENT 1 PHONE JACK RS232CCVBS 1 PHONE JACK IR & KEY Zener Diode isclose to wafer RGB SensorUSBWIFI +5VUSB FOR USB1USB1 USB2 MAX 1.5A2011.10.26 Full Scart18 Pin GenderSCART GENDER ZigBeeRadio Pulse MREMOTE OPTION ALL MREMOTE OPTIONAR4800 1/16WEthernet Block IC5800 STA380BWGP4MT5369 2011.11.21SCART AUDIO MUTE AUDOUT EU/CHINAHOTELOPTIC6000 A Z4580MTR-E1EARPHONE AMP HEADPHONE AMPOption FOR MTK Option FOR LG1152T/C/S & H/NIM & T2/C TUNEREU & CHINA Vout=0.6*1+R1/R2TU6500 TU6501OptionLNB DVB-S2 LNB Part AllegroDCDCGND and AGND are connected DCDCGND and AGND are connected in pin#27AUDIO OUT JACK OPTCOMMEREXTAMP COMMEREXTAMPJACK FOR COMMERCIAL 12V OUT RS-232C 9 PIN OPTCOMMEREXT12VFOR COMMERCIAL AUDIO OUT OPTCOMMEREXTAMP COMMERCIALOPTIONLVDS 51Pin LVDS OUTPUT Connector 41Pin LVDS OUTPUT ConnectorLVDSHIGHMID 2011.08.11L/DIMOUT LOCAL DIMMINGAR7600 POWER BLOCK THIS IS REVERSE PATTERNLEVEL SHIFTER BLOCK T-ConDon’t Connect Power At VDDI eMMC I/FHYNIXEMMC2GB Just Interal LDO CapacitorPlace Near Micom LOGOLIGHT R8901 10KPage Applicable Model XXLM760S-ZB 2012 LED/LCD TV Engineering guideCONTENT 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 changeHF mini-LVDS Main PCB for Broadband WIFIxxLM760S-ZB Chassis LD22E PCB P/No EAX64307905MTK5369 Block Diagram LM76 Power loadSide RearJack Interface Main SoC MTKFull Scart18 Pin Gender IC6100R0 옴 GP4 Backend block diagram EPI & T-conR 47옴 GP4 Backend block diagram EPI & T-Con EPI CH1/2/3EPI CH4/5/6 50PinGP4 Backend block diagram LVDS Tx & Local Dimming LVDS Tx BlockDual-link LVDS Output LVDSSEL “H”=JEIDA, “L” or NC=VESA LGDInterconnection 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 Touch EEPROM Register change with USB port Addr ValueIntroductions of 12Y RF ass’y + Magic Remote control 1. System ™ Pairing Information Transmission Send to TV after PairedPairing Information Transmission Sequence ™ Motion Data Transmissionpower mutehome ← ok →3. 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 WIFI Built in ass’y featureLGIT Block diagramPin map 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? 2. HDCP 2.0 & NETFLIX? ‰ Netflix‰ Why HDCP2.0? ‰ HDCP3. DTCP? 4. Changed BOM As-WasCurrent Æ 추가Only for training and service purposes Contents 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 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 andExternal 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 Check user menu Speaker offCheck audio B+ NormalIn case of External Input signal error Check and fix external device 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 problemaccordance Recognition errorExternal Input and Identify nose type Adjust VCOM F. Exterior defectContents of LCD TV Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual ALL MODELSSMAW200-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 NoiseAppendix Exchange PSULED driver No LightDim 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 moduleOnly 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 dateStandard Repair Process Detail Technical Manual ALL MODELSStandard Repair Process Detail Technical Manual LCD module change T-Con board change
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