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-85-From previouspageNo picture with S-VIDEO input sourceCheck Computer source input stage;Check IC8201 and peripheral circuit.Check sync signals and .No picture withComputer (RGB analog)input sourceNo picture with VIDEOinput sourceNoNo picture withComputer (RGB SCART)input sourceNoYesYesNoSG: PC_RGB signals are sent to IC8201. They are A/D-converted in IC8201and sent to IC301.Sync: PC_HS/VS signals are sent to IC8201 via IC8271(Inverter IC) and ADHSand ADVS signals are sent to IC301.Check AV source input stage;Check Y/C signals at IC8201, IC5231 and peripheral circuit.Check sync signals and .YesSG: Y signal is selected in IC5231, with S/CV_SW signal(S-VIDEO = Low).The selected signal is sent to IC8201. S_CHROMA signal is sent toIC8201. They are A/D-converted in IC8201 and sent to IC301.Sync: Y/C signals are sync-separated in IC8201, and ADHS and ADVS signalsare sent to IC301.Check Computer source input stage;Check RGB SCART signals at test points TP-RIN/GIN/BIN.Check IC8201, IC5231 and peripheral circuit.Check sync signals and .YesSG: RGB SCART signals are A/D-converted in IC8201 and sent to IC301.Sync: SCART_CV signal at 13 pin of D-sub_15 is selected in IC5231, withS/CV_SW signal(SCART = High). The selected signal is sent to IC8201. Itis sync-separated in IC8201, and ADHS and ADVS signals are sent toIC301.Check AV source input stage;Check IC8201 and peripheral circuit.Check sync signals and .SG: Composite video signal is sent to IC8201, and sent to IC301.Sync: Composite video signal is sync-separated in IC8201, and ADHS andADVS signals are sent to IC301.Troubleshooting |
