Hitachi DV-PF7E Service Manual page 35

(S-Y, S-C)
Are the video signals inputted into each pin
of IC102?
IC102 8PIN R
IC102 6PIN G
IC102 1PIN B
Are the video signals outputted to each pin
of IC102?
IC102 10PIN R
IC102 11PIN G
IC102 15PIN B
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 RGB video signals outputted to the
Scart jack (JK101)?
Are the composite video signals outputted to
Pin(19) of JK101 (Scart jack)?
Are the composite video signals outputted to
Pin(4) of IC751?
Are the "H" pulse inputted into Pins(9,10,11) of IC751?
Replace IC501.
A
Yes
Yes
Yes
No
No
No
Check the line between each pin of IC1401 and
each pin of IC102 on the Main CBA, and service
it if defective.
No
4PIN → IC102
IC1401
IC1401 14PIN → IC102
IC1401 15PIN → IC102
No
Is 5V voltage supplied to Pin(4,12) of IC102?
No
Check AL+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 JK101 from Pins (10, 11,
No
15) of IC102 and service it if defective.
Yes
Check the line between Pin(4) of IC751 and JK101
and service it if defective.
Yes
Replace IC751.
3-8
8PIN R
6PIN G
1PIN B
Yes
Replace IC102.