LG Electronics Official Service Manual for the LG 20LS7D Flat Panel Television

Page 1

website:http://biz.LGservice.com

LCD TV

SERVICE MANUAL

CHASSIS : LA74E

MODEL : 20LS7D(C) 20LS7D(C)-UB

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Image 1

Contents LCD TV Contents Do not use a line Isolation Transformer during this check General GuidanceServicing Precautions Small-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementPower Output, Transistor Device Removal/Replacement Diode Removal/ReplacementGeneral SpecificationTV SpecificationApplication range Test method White Chroma & BrightnessComponent Video Input Y, CB/PB, CR/PR RGB input PC/DTV Mechanical specificationApplication Object Adjustment InstructionSet Method ADC-Set AdjustmentRequired Test Equipment Preparation for Adjustments & Setting of Device23LS7D-UB Hdmi 23LS7D-UB RGBRequired Equipment Adjustment of White BalanceTV/CATV doesnt display TroubleshootingVideo doesnt display Component doesnt display Rgbpc doesnt display Hdmi doesnt display LCD Exploded View Exploded View Parts List Replacement Parts List Description / Specification C1608C0G1H220JT 22pF 5% 50V C0G -55TO+125C DIODEs TRANSISTORs & FETs ICsRESISTORs MNR04M0APJ680 68OHM 5% 1/16W 4P 8P R1185 R4007 0RJ1001C678 R4147 R6031 SWITCHes CONNECTORsCOILs & FILTERs & INDUCTORs JACKsLED,DIP BL-BUBGE301 Round 3MM OTHERsPage Page Mar