Daewoo DLP-26C2 Service Manual

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Daewoo DLP-26C2 Service Manual Manual pdf 39 page image

-39-7. Trouble Diagnosis7-1.Facts you must know when trouble Diagnosing or Repairing.A.Trouble diagnosing and repairing of set mean find out which PCBs or blocksare not working and replace them with new PCBs. Repairing the broken PCBsare not necessary Keep the broken PCBs and return to service center or R&Dcenter.B.This TROUBLE DIAGNOSIS list only contains representative and simple PCBtrouble diagnosis or to repair, contact R&D center.C.Basic TROUBLE DIAGNOSIS process.D.Required equipments for trouble diagnosis-Digital MultimeterUser Mode : measure DC VOLTAGE, DIODE VOLTAGE, SHORT/OPEN TEST-Screwdriver or electric screwdriver, plastic adjusting tool-Oscilloscope(for detailed examination only)E.Each BLOCK operations explained in this manual include oscilloscopewaveforms, but these are for reference only and utilizing them to repair PCBsis not necessary.F.Before replacing PCBs, you MUST turn off the AC switch.G.After the set is repaired, leave BACK COVER open for followings. RunHEATRUN for at least 30 minutes by displaying TEST PATTERN(Full White)of SERVICE MODE(Refer to Service Manual, 5, Service Mode). Check thescreen conditions and basic functions.(Remote Controller operation etc.)H.After BACK COVER is closed, redo HEATRUN for at least one hour with FullWhite input using TEST PATTERN of SERVICE MODE.Check the screen conditions and basic functions.Note:HEATRUN is conducted for at least 30 minutes with input TEST PATTERNFULL WHITE.Check problemSymptomsOpenBACK COVERTrouble Diagnosis& Replace brokenPCBAdjust new PCBmoduleHEATRUN andFull Function test Repair Complete