Sharp DV-SL90UM Service Manual - Page 21

FLOW CHART NO.19 Both functions of picture and sound do not operate normally. Replace the DVD Main CBA. No improvement can be found. Yes Replace the DVD Mecha. No Original DVD Main CBA is poor. FLOW CHART NO.20 Picture does not appear normally. Set the disc on the disc tray, and playback. No Are the video signals outputted to each pin of CN1601 on the AV CBA? CN1601 3PIN CN1601 4PIN CN1601 6PIN CN1601 8PIN CN1601 10PIN S-Y Cr/Pr Cb/Pb S-Y S-C Yes Are the video signals shown above inputted into each pin of IC1402, IC1403? No IC1402 3PIN S-Y IC1402 6PIN Cb/Pb IC1402 8PIN Cr/Pr IC1403 3PIN S-Y IC1403 1PIN S-C Yes Are the video signals outputted to each pin of IC1402, IC1403? IC1402 13PIN S-Y IC1402 11PIN Cb/Pb No IC1402 10PIN Cr/Pr IC1403 6PIN CVBS IC1403 5PIN S-Y IC1403 7PIN S-C Yes Are the video signals outputted to the specific output terminal? Are the luminance signals outputted to the No S-OUT terminal (JK1401)? Are the chroma signals outputted to the No S-OUT terminal (JK1401)? Are the component video signals outputted to the No VIDEO OUT terminal (JK1404)? Are the composite video signals outputted to No the VIDEO OUT terminal (JK1404)? Replace the DVD Main CBA or DVD Mecha. Check the line between each pin of CN1601 and each pin of IC1402, IC1403 on the AV CBA, and service it if detective. CN1601 8PIN → IC1402 CN1601 6PIN → IC1402 CN1601 4PIN → IC1402 CN1601 3PIN → IC1403 CN1601 10PIN → IC1403 3PIN S-Y 6PIN Cb/Pb 8PIN Cr/Pr 3PIN S-Y 1PIN S-C Is 5V voltage applied to the pin(4, 12) of IC1402, pin(4) of IC1403? Yes No Replace IC1402, Check P-ON+5V line and IC1403. service it if detective. Check the periphery of JK1401 from Pin (5) of IC1403 and service it if detective. Check the periphery of JK1401 from Pin (7) of IC1403 and service it if detective. Check the periphery of JK1404 from Pins (10, 11, 13) of IC1402 and service it if detective. Check the periphery of JK1404 from Pin(6) of IC1403 and service it if detective. 1-8-5 E592ATS