Sharp DV-SL90UM, Руководство по обслуживанию

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