Denon DVM725 Service Manual page 18

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3 7 63 1515 0
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?
CN1601 3PIN
CN1601 5PIN
CN1601 7PIN
CN1601 9PIN
Are the video signals shown above inputted into
each pin of IC1402?
IC1402 2PIN
IC1402 6PIN
IC1402 9PIN
IC1402 11PIN
Are the video signals outputted to each pin
of IC1402?
IC1402 18PIN
IC1402 15PIN
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L 13942296513
IC1402 13PIN
IC1402 21PIN
IC1402 23PIN
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 (JK1403)?
Are the composite video signals outputted to
the VIDEO OUT terminal (JK1403)?
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Pr/Cr
Pb/Cb
S-Y(I/P)
S-C
Yes
S-C
S-Y(I/P)
Pb/Cb
Pr/Cr
Yes
S-Y(I/P)
Pb/Cb
Pr/Cr
CVBS
S-C
Yes
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8
No
Replace the DVD Main CBA Unit or DVD Mechanism.
Check the line between each pin of CN1601 and
each pin of IC1402 on the AV CBA, and service
No it if detective.
CN1601
CN1601
CN1601
CN1601
No
Q Q
Is 5V voltage applied to the Pin(1, 24) of IC1402 ?
3 6 7 1 3
Yes
Replace IC1402.
Check the periphery of JK1401 from
No
Pin (18) of IC1402 and service it if detective.
No Check the periphery of JK1401 from
Pin (23) of IC1402 and service it if detective.
No
Check the periphery of JK1403 from Pins (13, 15,
18) of IC1402 and service it if detective.
No
Check the periphery of JK1403 from Pin(21) of
IC1402 and service it if detective.
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18
2 9 9 4 2 8
9PIN → IC1402
2PIN S-C
7PIN → IC1402
6PIN S-Y(I/P)
5PIN → IC1402
9PIN Pb/Cb
3PIN → IC1402 11PIN Pr/Cr
1 5 0 5 8 2 9 9 4
No
Check P-ON+5V line and
service it if detective.
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DVM725
9 9
2 8 9 9