Hitachi DV-P588A, Руководство по обслуживанию

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3-5
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 or DVD Mecha.
Check the line between each pin of CN1601 and
each pin of IC1401 on the AV CBA, and service it
if detective.
Is 5V voltage applied to the pin(1, 24) of
IC1401?
Replace IC1401. Check P-ON+5V line and
service it if detective.
CN1601 5PIN
→
IC1402 6PIN S-Y
CN1601 7PIN
→
IC1402 2PIN S-C
CN1601 1PIN
→
IC1402 11PIN Cr
CN1601 3PIN
→
IC1402 9PIN Cb
Are the video signals shown above inputted into
each pin of IC1401?
Are the video signals outputted to each pin
of IC1401?
Yes
Yes No
Yes
Yes
No
No
No
CN1601 5PIN S-Y
CN1601 7PIN S-C
CN1601 1PIN Cr
CN1601 3PIN Cb
IC1402 6PIN S-Y
IC1402 2PIN S-C
IC1402 11PIN Cr
IC1402 9PIN Cb
IC1402 21PIN CVBS
IC1402 18PIN S-Y
IC1402 23PIN S-C
IC1402 13PIN Cr
IC1402 15PIN Cb
Check the periphery of JK1404 from Pins (13, 15,
18) of IC1401 and service it if detective.
Check the periphery of JK1404 from Pin(21) of
IC1401 and service it if detective.
Check the periphery of JK1401 from
Pin (18) of IC1401 and service it if detective.
Check the periphery of JK1401 from
Pin (23) of IC1401 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.20
Both functions of picture and sound do not operate normally.
Replace the DVD Main CBA.
Replace the DVD Mecha.
No
Yes
No improvement can be found.
Original DVD Main CBA is poor.