Sharp DV-SL80 Service Manual page 20

FLOW CHART NO.19
Both functions of picture and sound do not operate normally.
Replace the DVD Main CBA.
No improvement can be found.
Replace the DVD Mecha.
FLOW CHART NO.20
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?
CN1601 4PIN Cr/Pr
CN1601 6PIN Cb/Pb
CN1601 8PIN S-Y
CN1601 10PIN S-C
Are the video signals shown above inputted into
each pin of IC1402?
IC1402 1PIN S-C
IC1402 3PIN S-Y
IC1402 6PIN Cb/Pb
IC1402 8PIN Cr/Pr
Are the video signals outputted to each pin
of IC1402?
IC1402 13PIN S-Y
IC1402 11PIN Cb/Pb
IC1402 10PIN Cr/Pr
IC1402 14PIN CVBS
IC1402 15PIN S-C
Are the video signals outputted to the specific
output terminal?
Are the luminance signals outputted to the
S-OUT terminal (JK1401)?
Are the chroma signals outputted to the
S-OUT terminal (JK1401)?
Are the component video signals outputted to the
VIDEO OUT terminal (JK1404)?
Are the composite video signals outputted to
the VIDEO OUT terminal (JK1404)?
Yes
Yes
Yes
Yes
No
Original DVD Main CBA is poor.
No
Replace the DVD Main CBA or DVD Mecha.
Check the line between each pin of CN1601 and
each pin of IC1402 on the AV CBA, and service
No it if detective.
CN1601 10PIN → IC1402
8PIN → IC1402
CN1601
6PIN → IC1402
CN1601
4PIN → IC1402
CN1601
No
Is 5V voltage applied to the pin(4, 12) of IC1402?
Yes
Replace IC1402.
Check the periphery of JK1401 from
No
Pin (13) of IC1402 and service it if detective.
No Check the periphery of JK1401 from
Pin (15) of IC1402 and service it if detective.
No
Check the periphery of JK1404 from Pins (10, 11,
13) of IC1402 and service it if detective.
No
Check the periphery of JK1404 from Pin(14) of
IC1402 and service it if detective.
1-8-5
1PIN S-C
3PIN S-Y
6PIN Cb/Pb
8PIN Cr/Pr
No
Check P-ON+5V line and
service it if detective.
E5943TS