FUNAI DRVR-B778S Service Manual page 30

FLOW CHART NO.5
Picture does not appear normally. [In the S-VIDEO/Composite video output (JK1502, JK1506, JK2001)]
Set the disc on the disc tray and playback.
Are the video signals inputted to each pin of CN1502? No
CN1502 1PIN VIDEO-Y(I)-OUT
CN1502 9PIN VIDEO-C-OUT
Are the video signals inputted to each pin of IC1515? No
IC1515 3PIN VIDEO-Y(I)-OUT
IC1515 1PIN VIDEO-C-OUT
Are the video signals outputted to each pin of IC1515?
IC1515 5PIN VIDEO-Y(I)-OUT
IC1515 7PIN VIDEO-C-OUT
IC1515 6PIN VIDEO-OUT
Yes (VIDEO-Y(I)-OUT,
VIDEO-C-OUT)
Is the video signal inputted to Pin(3) of IC1508?
Is the video signal outputted to Pin(4) of IC1508?
Is the video signal outputted to Pin(5) of IC1518?
Are the video signals outputted to each pin of
IC1518?
IC1518 29PIN VIDEO-OUT1
IC1518 30PIN VIDEO-OUT2
Are the video signals outputted to the specific
output terminal?
Are the luminance signals outputted to the
S-VIDEO OUT terminal (JK1506)?
Are the chroma signals outputted to the
S-VIDEO OUT terminal (JK1506)?
Are the composite video signals outputted to the
VIDEO OUT (AV1) terminal (JK1502)?
Are the composite video signals outputted to the
VIDEO OUT (AV2) terminal (JK2001)?
No
Yes
Yes
Yes (VIDEO-OUT)
Yes
Yes
Yes
Yes
"A"
Replace DVD MECHANISM & DVD MAIN CBA
ASSEMBLY.
Check the line between each pin of IC1515 and
each pin of CN1502, and service it if defective.
IC1515 3PIN → CN1502 1PIN VIDEO-Y(I)-OUT
IC1515 1PIN → CN1502 9PIN VIDEO-C-OUT
No
Is 5V voltage supplied to Pin(4) of IC1515?
Yes
Replace IC1515.
No
Check the line between Pin(3) of IC1508 and
Pin(6) of IC1515, and service it if defective.
No
Is 5V voltage supplied to Pin(16) of IC1508?
Is -5V voltage supplied to Pin(7) of IC1508?
Yes
Replace IC1508.
No
Check the line between Pin(5) of IC1518 and
Pin(4) of IC1508, and service it if defective.
No
Is 12V voltage supplied to Pin(2,4) of IC1518?
Yes
Replace IC1518.
Check the periphery of JK1506 from
No
Pin (5) of IC1515 and service it if defective.
Check the periphery of JK1506 from
No
Pin (7) of IC1515 and service it if defective.
Check the periphery of JK1502 from Pin (29) of
No
IC1518 and service it if defective.
No Check the periphery of JK2001 from Pin (30) of
IC1518 and service it if defective.
1-11-6
No
Check DVD-P-ON+5V line
and service it if defective.
No
Check AL+5V(1) and AL-5V
line, and service it if defective.
No
Check AL+12V(1) line
and service it if defective.
E9G01TR