Hitachi DV-PF35U, Руководство по обслуживанию

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3-6
FLOW CHART NO.7
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 Main CBA?
Replace the DVD Main CBA or the DVD
Mechanism.
Check the line between each pin of CN1601 and
each pin of IC1402 on the Main CBA,
and service it if defective.
Is 5V voltage applied to the Pin(4, 12) of
IC1402?
Replace IC1402.
Check DVD-P-ON+5V line and service it if defective.
Check the periphery of JK1403 from Pins (10, 11,
13) of IC1402 and service it if defective.
Check the periphery of JK1401 from
Pin (13) of IC1402 and service it if defective.
Check the periphery of JK1401 from
Pin (15) of IC1402 and service it if defective.
Are the composite video signals outputted to
Pin(15) of IC751?
CN1601 8PIN
→
IC1402 3PIN S-Y(I/P)
CN1601 10PIN
→
IC1402 1PIN S-C
CN1601 6PIN
→
IC1402 6PIN Pb/Cb
CN1601 4PIN
→
IC1402 8PIN Pr/Cr
Are the video signals shown above inputted into
each pin of IC1402?
Are the video signals outputted to each pin
of IC1402?
Are the video signals outputted to the specific
output terminal?
Are the component video signals outputted to the
VIDEO OUT terminal (JK1403)?
Are the luminance signals outputted to the
S-OUT terminal (JK1401)?
Are the chroma signals outputted to the
S-OUT terminal (JK1401)?
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
CN1601 8PIN S-Y(I/P)
CN1601 10PIN S-C
CN1601 6PIN Pb/Cb
CN1601 4PIN Pr/Cr
IC1402 3PIN S-Y(I/P)
IC1402 1PIN S-C
IC1402 6PIN Pb/Cb
IC1402 8PIN Pr/Cr
IC1402 14PIN CVBS
IC1402 13PIN S-Y(I/P)
IC1402 15PIN S-C
IC1402 11PIN Pb/Cb
IC1402 10PIN Pr/Cr
Replace IC751.
Replace IC501.
Are the composite video signals outputted to
the VIDEO OUT terminal (JK751)?
Check the line between Pin(15) of IC751 and JK751
and service it if defective.
Are the "L" pulse inputted into Pins(9,10,11) of IC751?
No
Yes
Yes
No
No