22
DVD-1920/756
Is 5V voltage applied to the Pin(1, 24) of IC1402
and Pin(4) of IC1403?
Replace IC1402
or IC1403.
Check P-ON+5V line and
service it if detective.
Are the video signals outputted to each pin
of IC1402 or IC1403?
Ye s N o
Ye s
Ye s
No
IC1402 18PIN S-Y(I/P)
IC1402 15PIN Cb/Pb
IC1402 13PIN Cr/Pr
IC1403 5PIN S-Y(I)
IC1403 6PIN CVBS
IC1403 7PIN S-C
Check the periphery of JK1404 from Pins (13, 15,
18) 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)?
FLOW CHART NO.21
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 Unit or DVD Mechanism.
Check the line between each pin of CN1601 and
each pin of IC1402 or IC1403 on the AV CBA,
and service it if detective.
CN1601 3PIN → IC1403 3PIN S-Y(I)
CN1601 10PIN → IC1403 1PIN S-C
CN1601 8PIN → IC1402 6PIN S-Y(I/P)
CN1601 6PIN → IC1402 9PIN Cb/Pb
CN1601 4PIN → IC1402 11PIN Cr/Pr
Are the video signals shown above inputted into
each pin of IC1402 or IC1403?
Ye s
No
No
CN1601 3PIN S-Y(I)
CN1601 4PIN Cr/Pr
CN1601 6PIN Cb/Pb
CN1601 8PIN S-Y(I/P)
CN1601 10PIN S-C
IC1403 3PIN S-Y(I)
IC1403 1PIN S-C
IC1402 6PIN S-Y(I/P)
IC1402 9PIN Cb/Pb
IC1402 11PIN Cr/Pr
FLOW CHART NO.20
Both functions of picture and sound do not operate normally.
Replace the DVD Main CBA Unit.
Replace the DVD Mechanism.
No
Ye s
No improvement can be found.
Original DVD Main CBA Unit is poor.
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1
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9
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2
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5
1
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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