Hitachi DV-P725U, Руководство по обслуживанию

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1-8-7
FLOW CHART NO.20
Picture do not operate normally.
Set the disc on the disc tray.
Are the video signals outputted to each pins of
main unit connector CN701?
Check the main unit. (IC601 periphery circuit.)
Check the line between each pins of main unit
connector CN701 and each pins of IC1402.
Is 5V voltage applied to the pin(1, 3, 5, 34) of
IC1402?
Check or replace IC1402?
Check the peripheral circuit of JK1403 from the
pin (30) of IC1402.
Check the peripheral circuit of JK1401 from the
pin (27) of IC1402.
Check the peripheral circuit of JK1401 from the
pin (33) of IC1402.
CN701 7PIN
→
IC1402 4PIN CVBS
CN701 5PIN
→
IC1402 6PIN S-Y
CN701 9PIN
→
IC1402 2PIN S-C
Are the video signals shown above input into each
pins of IC1402?
Are the video signals outputted to each pins
of IC1402?
Are the video signals outputted to the specific
output terminal?
Are the composite 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
CN701 7PIN CVBS
CN701 5PIN S-Y
CN701 6PIN S-C
IC1402 4PIN CVBS
IC1402 6PIN S-Y
IC1402 2PIN S-C
IC1402 30PIN CVBS
IC1402 27PIN S-Y
IC1402 33PIN S-C