LG Electronics 20LC1R-ZG service manual Troubleshooting, AProcess

Page 15

TROUBLESHOOTING

No power

(LED indicator off)

:[A]Process

Check 15V or 5V

of Lips

Pass

Check Output of

U406

Pass

Check LED Assy

Pass

Check J103, J125, J126 Connector

Fail

Fail

Fail

Check short of main B/D or Change Lips

Check Output of

Q402Fail

Pass

Change U406

Change LED Assy

Change Q402

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Contents LCD TV Contents Safety Precautions General GuidanceDo not use a line Isolation Transformer during this check Electrostatically Sensitive ES Devices Servicing PrecautionsDiode Removal/Replacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Power Output, Transistor Device Removal/ReplacementDisassembly Application range SpecificationGeneral Specification Mechanical SpecificationOptical Character Reference table-FunctionOutgoing Condition OFF Engineering Specification 8-1.General SpecificationBlue OrangePAL-BG Philips Mono SystemTXT Name LGE KumiBoard Assembly line process Adjustment InstructionConfirmation of Luminance Total Assembly line processOption configuration Adjustment Preparation Iicsw should set toSVC Remocon AProcess TroubleshootingBProcess Fail L110, L112, R194, R198 Page Block Diagram Block Diagram Description Wiring Diagram 041 140 030 100 090 070 080 120 060 110 020 010 050 Exploded ViewDescription Exploded View Parts ListMain Board Capacitor Replacement Parts List0CE107WF6DC Coil & Filter & Inductor RESISTORs Description / Specification Control Board Page Page Page Page Page Aug