Sharp DV-RW550U Service Manual page 33

A
Are the video signals outputted to each pin of
CN201 on the MAIN CBA?
CN201 7PIN VIDEO-Y(I/P)
CN201 3PIN VIDEO-Cr/Pr
CN201 5PIN VIDEO-Cb/Pb
CN201 1PIN VIDEO-Y(I)
CN201 9PIN VIDEO-C
Are the video signals shown above inputted into
each pin of IC1404 and each pin of IC1405?
IC1405 3PIN VIDEO-Y(I/P)
IC1405 8PIN VIDEO-Cr/Pr
IC1405 6PIN VIDEO-Cb/Pb
IC1404 3PIN VIDEO-Y(I)
IC1404 1PIN VIDEO-C
Are the video signals outputted to each pin of
IC1404 and each pin of IC1405?
IC1405 13PIN VIDEO-Y(I/P)
IC1405 10PIN VIDEO-Cr/Pr
IC1405 11PIN VIDEO-Cb/Pb
IC1404 6PIN VIDEO-CVBS
IC1404 5PIN VIDEO-Y(I)
IC1404 7PIN VIDEO-C
Are the video signals outputted to the specific
output terminal?
Are the luminance signals outputted to the
S-VIDEO OUT terminal (JK1401)?
Are the chroma signals outputted to the
S-VIDEO OUT terminal (JK1401)?
Are the Y, Cb, Cr signals outputted to the
COMPONENT OUT terminal (JK1403)?
Are the composite video signals outputted to
the VIDEO OUT terminal (JK751)?
Is the video signal outputted to Pin(15) of IC1406?
Is the video signal outputted to the emitter of Q391?
Yes
Check the line between the
emitter of Q391 and JK751,
and service it if defective.
Yes
Yes
Yes
No
Yes
No
Replace Q391.
No
Replace the DVD Mechanism & DVD Main CBA
Assembly.
Check the line between each pin of CN201 and
each pin of IC1404 and IC1405 on the MAIN CBA,
No and service it if defective.
CN201 7PIN
CN201 3PIN
CN201 5PIN
CN201 1PIN
CN201 9PIN
No
Is 5V voltage applied to the Pin(4, 12) of
IC1405 and the Pin(4) of IC1404?
Yes
Replace IC1404
or IC1405.
Check the periphery of JK1401 from
No
Pin (5) of IC1404 and service it if defective.
No Check the periphery of JK1401 from
Pin (7) of IC1404 and service it if defective.
No
Check the periphery of JK1403 from Pins (10, 11,
13) of IC1405 and service it if defective.
No
Are the "L" pulse inputted to Pin(9,10,11) of IC1406?
Is 5V voltage supplied to
Pin(16) of IC1406?
Yes
Replace IC1406.
1-11-7
→ IC1405
3PIN VIDEO-Y(I/P)
→ IC1405
8PIN VIDEO-Cr/Pr
→ IC1405
VIDEO-Cb/Pb
6PIN
→ IC1404
VIDEO-Y(I)
3PIN
→ IC1404
VIDEO-C
1PIN
No
Check DVD P-ON+5V line
and service it if defective.
Yes
Replace IC501.
No
Check AL+5V line and service
it if defective.
E9656TS
No