Denon DVD-1930CI Service Manual page 20

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3 7 63 1515 0
FLOW CHART NO.19
Both functions of picture and sound do not operate normally.
Replace the DVD Main CBA Unit.
No improvement can be found.
Replace the DVD Mechanism.
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 2PIN
CN1601 4PIN
CN1601 6PIN
CN1601 8PIN
CN1601 10PIN
Are the video signals shown above inputted into
each pin of IC1402 or IC1403?
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L 13942296513
IC1403 3PIN
IC1403 1PIN
IC1402 3PIN
IC1402 6PIN
IC1402 8PIN
Are the video signals outputted to each pin
of IC1402 or IC1403?
IC1402 13PIN
IC1402 11PIN
IC1402 10PIN
IC1403 5PIN
IC1403 6PIN
IC1403 7PIN
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)?
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Are the composite video signals outputted to
the VIDEO OUT terminal (JK1404)?
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Yes
S-Y(I)
Pr/Cr
Pb/Cb
S-Y(I/P)
S-C
Yes
S-Y(I)
S-C
S-Y(I/P)
Pb/Cb
Pr/Cr
Yes
S-Y(I/P)
Pb/Cb
Pr/Cr
S-Y(I)
CVBS
S-C
Yes
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8
No
Original DVD Main CBA Unit is poor.
No
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.
No
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3 6 7 1 3
CN1601
CN1601 10PIN → IC1403
CN1601
CN1601
CN1601
No
Is 5V voltage applied to the Pin(4, 12) of IC1402
and Pin(4) of IC1403?
Yes
Replace IC1402
or IC1403.
Check the periphery of JK1401 from
No
Pin (5) of IC1403 and service it if detective.
No Check the periphery of JK1401 from
Pin (7) of IC1403 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(6) of
IC1403 and service it if detective.
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20
DVD-1930CI / DVD-757
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
2PIN → IC1403
3PIN S-Y(I)
1PIN S-C
8PIN → IC1402
3PIN S-Y(I/P)
6PIN → IC1402
6PIN Pb/Cb
4PIN → IC1402
8PIN Pr/Cr
No
Check P-ON+5V line and
service it if detective.
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9 9
2 8 9 9