F. Exterior defect, Lcd Tv | LG Electronics 42LT640H-ZA instruction

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LG Electronics 42LT640H-ZA service manual F. Exterior defect, Lcd Tv

Contents

http//biz.lgservice.com READ THE SAFETY PRECAUTIONS IN THIS MANUALhttp//aic.lgservice.com http//eic.lgservice.com SPECIFICATION CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONS IMPORTANT SAFETY NOTICE SAFETY PRECAUTIONS Electrostatically Sensitive ES Devices SERVICING PRECAUTIONS Removal IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement 3. Test method SPECIFICATION4. Model General Specification 1. Application range HDMI1-DTV/DVI RGB InputRGB-PC AnalogD-SUB 15PIN 5. Video resolutions 2D 5.1. Component Input Y, CB/PB, CR/PR5.2. RGB Input PC PCDVI 5.3. HDMI InputPC/DTV 1. Application Range ADJUSTMENT INSTRUCTIONBoot file Download After downloading, have to adjust Tool Option again 3.2. Function Check 4. Total Assembly line process4.1. Adjustment Preparation 3.1. ADC Process Manual W/B process using adjust Remote control 4.4. EDID data4.2. DDC EDID Write RGB 128Byte 4.3 DDC EDID Write HDMI 256Byte 4.6.2. HI-POT auto-check 4.5. Outgoing condition Configuration4.6. HI-POT Test 4.6.1. HI-POT auto-check preparation 5.3. Method & notice 5.1. Signal Table5. Model name & Serial number D/L 5.2. Comand Set 6.1. Download Procedure 6. CI+ Key Download methodCI+ Key Value Half BLOCK DIAGRAMS7LR All rights reserved EXPLODED VIEW Copyright 2012 LG Electronics. Inc. All rights reserved EMEA INTERACTIVEGP4MSTAR 2011 . 08 OLED THERMAL Step Up regulator 3 . 3V to 5VMAX 250mA +3.3VNormal FROM LIPS & POWER B/DPowerDET +1.5VDDR NTP-7500L IC501 CONTROL IR & LED MIRROR Pol - change 51Pin LVDS Connector30Pin LVDS Connector For HD 60HzNormal For FHD 60/120Hz SIDEHDMI HDMI1For CEC HDMI2 0 . 3 3 u F USBDIODES RGB/SPDIF/PC/HP/USB S7LRDIVXMS10 W25Q80BVSSIG IC1300MX25L8006EM2I-12G IC1300-*1 P4RGLOBALTUNERBLOCK SI2176ATSC1INPUTHSI2156DVB1INPUTH IC1501 LGDT1001PILG1001 A2 Full Scart/ Comp1 EXTSPK OUT UART/I2C SWITCHEXTSPK AMP EXTSPKCONTROL/DEBUG REAL TIME CLOCKRTC EXTERNALPOWER OUT 5V/12V Option name of this page CI SLOT because of Hong Kong CI Region SMD GASKET Page 1. Trouble Shooting Contents of LCD TV Standard Repair Process A2 Check Power Board 24V,12V,3.5V output A. Video errorMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable LCD TV Board voltages of PowerCheck various No Video Signal strength Normal over 30% Signal Quality Normal over 30% A. Picture ProblemBy using Digital signal level meter By using Diagnostics menu on OSD Menu→Setup→Manual Tuning Link Cable Check color by input -External Input COMPONENT -RGB※ Check and replace Check color condition by input -External Input -Component RGB Connect other external device and cableExternal device screen error-Color error Vertical/Horizontal bar, residual image, light spot Check Power On ‘”High” B. Power errorStand-By Red Operating white Check Power LED POWEROFFCPUABNORMAL Check Power Off Starusinstart menuIf Power Off mode is not displayed Check Power B/D voltage POWEROFFABNORMAL1 Check audio B+ C. Audio errorPower Board Check user menu Speaker off Check audio B+ Voltage 20V or In case of External Input signal error Check and fix external device Output signal D. General Function Problem1. Remote controlR/C operating error Check & Repair Cable connection Connector solder S/W Version D. Function errorCheck input signal Y Check technical Signal information input? - Fix information Identify nose type E. Noise F. Exterior defect Standard Repair Process Detail Technical Manual A. Video errorVideo error, video lag/stopMENU -Æ red keycustomer support -Æ signal test -Æ select channel When the signal is strong, use the attenuator -10dB, -15dB, -20dB etc Version 1. Checking method for remote controller for adjustmentPress the IN-START with the remote controller for adjustment ALL MODELS You can view 6 types of patterns using the ADJ Key A. Video errorColor error Appendix Exchange T-Con Board Appendix Exchange T-Con Board No picture/Sound Ok A - 3/5 Appendix Exchange PSULED driverNo Light Dim Light Press damage Appendix Exchange the ModuleUn-repairable Cases In this case please exchange the module Panel Mura, Light leakage Un-repairable Cases In this case please exchange the module Entry method 1. Press the IN-START button of the remote controller for adjustment2. Check the entry into adjustment item B. Power error Off when on, off whiling viewing 2. Select the AUDIO function of the Menu C. Audio errorNo audio/Normal video1. Press the MENU button on the remote controller Checking method