D. Function error, Lcd Tv, Check & Repair

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LG Electronics 340T, 340S, 3450 service manual D. Function error, Remote controlR/C operating error, Lcd Tv, Check & Repair

Contents

READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD21CSERVICE MANUAL http//aic.lgservice.com SERVICING PRECAUTIONS CONTENTSSAFETY PRECAUTIONS SPECIFICATION SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE SERVICING PRECAUTIONS Electrostatically Sensitive ES Devices Small-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal 1. Application range SPECIFICATION4. Model General Specification 3. Test method DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S QPSK 2 ~ 45Msymbol/s 5.2. RGB Input PC - LS35/LS34/CS46 series models are not supported 5. Video resolutions 2D5.1. Component Input Y, CB/PB, CR/PR 5.3. HDMI InputPC/DTV PCDVI 1. Application Range ADJUSTMENT INSTRUCTIONBoot file Download 2. Designation 3.2. EDID Download 3.1. ADC Process3.3. EDID data 7. ADC Calibration 3.4 Function Check 4. Total Assembly line process4.1. Adjustment Preparation 5. HI-POT Test 4.3. Outgoing condition Configuration6.1. Signal Table 6. Model name & Serial number D/L 7.1 MAC Address 7. MAC Address & CI+ key download6.3. Method & notice GP4LOW 7.2 LAN Inspection 7.3. LAN PORT INSPECTIONPING TEST LG2111 A RearSide IC101 TDSN Applied Model **LM580T, **560T, **LS350T, **CS460TLS350T/CS460T G301D G001D 560S, **LS350S, **CS460SLS350S/CS460S EXPLODED VIEW +3.3VNormal FROM LIPS & POWER B/DPowerDET +1.5VDDR 30Pin LVDS Connector LVDS for large inch51Pin LVDS Connector For FHD 60Hz FOR FHD REVERSE10bit IC1201 S7LR2DIVXMS10GP4LS7LR22011/06/03 DDR25612 H5TQ1G63DFR-H9C 2011/06/03 Serial Flash for SPI bootGP4LS7LR2 SFLASH1MB 10067972-0500LF CI RegionOption name of this page CISLOT because of Hong Kong ETHERNET H/W option ETHERNETGP4LS7LR22011/06/14 ETHERNET21 IR/LED and control for on.y ’12 sub without IR-OUT IR/CONTROLW/OIROUT TU2601 GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TDSQ-G001D GP4LS7LR22011/11/02 DVBS27 DVB-S2 LNB Part AllegroOptionLNB DCDCGND and AGND are connected AUDIO AMPSTA380BWE GP4LS7LR22011/11/16 AMPSTA380BWE NAND FLASH MEMORY Normal Normal PowerVDDC DDR3 USB SIDE USB1DIODES For CEC HDMI2EANON SIDE HDMIHDMI1 HDMI2 SCART AUDIO OUT Full ScartCOMPONENT SCART AUDIO MUTE RS-232C 4PIN GP4LS7LR22011/09/26 MSTAR DEBUG4PIN MSTART DEBUG4PIN2011/09/05 Page Contents of LCD TV Standard Repair Process Error symptom Contents of LCD TV Standard Repair Process Detail Technical ManualContinue to the next page Content Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A. Video errorLCD TV A2 Check Power Board 24v output Board 3.5V,12V,20V voltages of PowerCheck various or 24V… Signal Quality Normal over 50% By using Digital signal level meter By using Diagnostics menu on OSDMenu→ Set up→ Support → Signal Test Signal strength Normal over 50% → Set-Top-Box, Different maker TV etc ※ Check A8/ A9Check color by input -External Input COMPONENT -RGB Link Cable Connect other external device and cable External device screen error-Color errorVertical/Horizontal bar, residual image, light spot Check color condition by input -External Input -Component RGB Check Power On ‘”High” B. Power errorCheck Power LED Measure voltage of each output of Power B/D POWEROFFABNORMAL1 Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage POWEROFFCPUABNORMAL Check user menu Speaker off C. Audio error24V of Power Check audio B+ In case of External Input signal error Check and fix external device Check audio B+ Voltage Check & Repair D. Function error1. Remote controlR/C operating error Recognition error Check input signalY Check technical Signal information input? - Fix information Replace Main B/D E. Noise Identify nose type F. Exterior defect

LG Electronics 340T D. Function error, Remote controlR/C operating error, Lcd Tv, Check & Repair

Models: 3450 340S 340T