D. Function error, Lcd Tv, Check input signal

Contents http//aic.lgservice.com CHASSIS LD21CSERVICE MANUAL READ THE SAFETY PRECAUTIONS IN THIS MANUALSPECIFICATION CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONSIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSRemoval IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement3. Test method SPECIFICATION4. Model General Specification 1. Application rangeDVB-S QPSK 2 ~ 45Msymbol/s Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s5. Video resolutions 2D 5.1. Component Input Y, CB/PB, CR/PR5.2. RGB Input PC - LS35/LS34/CS46 series models are not supported PCDVI 5.3. HDMI InputPC/DTV2. Designation ADJUSTMENT INSTRUCTIONBoot file Download 1. Application Range7. ADC Calibration 3.1. ADC Process3.3. EDID data 3.2. EDID Download4. Total Assembly line process 4.1. Adjustment Preparation3.4 Function Check 6. Model name & Serial number D/L 4.3. Outgoing condition Configuration6.1. Signal Table 5. HI-POT TestGP4LOW 7. MAC Address & CI+ key download6.3. Method & notice 7.1 MAC Address7.3. LAN PORT INSPECTIONPING TEST 7.2 LAN InspectionIC101 RearSide LG2111 AG301D Applied Model **LM580T, **560T, **LS350T, **CS460TLS350T/CS460T TDSN560S, **LS350S, **CS460S LS350S/CS460SG001D EXPLODED VIEW +1.5VDDR FROM LIPS & POWER B/DPowerDET +3.3VNormalFOR FHD REVERSE10bit LVDS for large inch51Pin LVDS Connector For FHD 60Hz 30Pin LVDS ConnectorH5TQ1G63DFR-H9C S7LR2DIVXMS10GP4LS7LR22011/06/03 DDR25612 IC1201SFLASH1MB Serial Flash for SPI bootGP4LS7LR2 2011/06/03CI Region Option name of this page CISLOT because of Hong Kong10067972-0500LF H/W option ETHERNET GP4LS7LR22011/06/14 ETHERNET21ETHERNET IR/CONTROLW/OIROUT IR/LED and control for on.y ’12 sub without IR-OUTTDSQ-G001D GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TU2601DCDCGND and AGND are connected DVB-S2 LNB Part AllegroOptionLNB GP4LS7LR22011/11/02 DVBS27GP4LS7LR22011/11/16 AMPSTA380BWE AUDIO AMPSTA380BWENAND FLASH MEMORY DDR3 Normal PowerVDDC NormalUSB1DIODES USB SIDEHDMI2 HDMI2EANON SIDE HDMIHDMI1 For CECSCART AUDIO MUTE Full ScartCOMPONENT SCART AUDIO OUTGP4LS7LR22011/09/26 RS-232C 4PINMSTART DEBUG4PIN 2011/09/05MSTAR DEBUG4PIN Page Contents of LCD TV Standard Repair Process Content Contents of LCD TV Standard Repair Process Detail Technical ManualContinue to the next page Error symptomA2 Check Power Board 24v output A. Video errorLCD TV Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cableor 24V… voltages of PowerCheck various Board 3.5V,12V,20VBy using Digital signal level meter By using Diagnostics menu on OSD Menu→ Set up→ Support → Signal Test Signal strength Normal over 50%Signal Quality Normal over 50% → Set-Top-Box, Different maker TV etc Link Cable A8/ A9Check color by input -External Input COMPONENT -RGB ※ CheckCheck color condition by input -External Input -Component RGB External device screen error-Color errorVertical/Horizontal bar, residual image, light spot Connect other external device and cableMeasure voltage of each output of Power B/D B. Power errorCheck Power LED Check Power On ‘”High”POWEROFFCPUABNORMAL Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage POWEROFFABNORMAL1Check audio B+ C. Audio error24V of Power Check user menu Speaker offCheck audio B+ Voltage In case of External Input signal error Check and fix external deviceD. Function error 1. Remote controlR/C operating errorCheck & Repair Replace Main B/D Check input signalY Check technical Signal information input? - Fix information Recognition errorIdentify nose type E. NoiseF. Exterior defect