Hitachi DV-PF7E Service Manual page 37

(S-Y, S-C)
Are the video signals inputted into each pin
of IC1402?
IC1402 8PIN Cr/Pr
IC1402 3PIN Y(I/P)
IC1402 6PIN Cb/Pb
Are the video signals outputted to each pin
of IC1402?
IC1402 10PIN Cr/Pr
IC1402 13PIN Y(I/P)
IC1402 11PIN Cb/Pb
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
component video out terminal (JK1403)?
B
Yes
Yes
Yes
Check the line between each pin of IC1401 and
each pin of IC1402 on the Main CBA, and service
it if defective.
No
3PIN → IC1402
IC1401
IC1401 13PIN → IC1402
1PIN → IC1402
IC1401
No
Is 5V voltage supplied to Pin(4,12) of IC1402?
No
Check DVD-P-ON+5V line
and service it if defective.
Check the periphery of JK1401 from
No
Pin (5) of IC1403 and service it if defective.
Check the periphery of JK1401 from
No
Pin (7) of IC1403 and service it if defective.
Check the periphery of JK1403 from Pins (10, 11,
No
13) of IC1402 and service it if defective.
3-10
8PIN Cr/Pr
3PIN Y(I/P)
6PIN Cb/Pb
Yes
Replace IC1402.