Samsung DVD-R157 Service Manual page 27

CVBS (Video) output error
or CN2 of Main PCB has
Power is Normal(5v)
About P-P1V appears at
Check the RCA Cable
Samsung Electronics
PIN 12 of
CN3 of Jack PCB
1V pk-pk level?
Yes
Check pin7 of the
IC801 1V p-p level?
Yes
at IC801[pin24, 29]?
Yes
Check pin25 of the
IC801 1V p-p level?
Yes
Video signal of
Output Jack?
Yes
No
Check the DIC1 on MAIN PCB
No
Check the connection between
12Pin in CN3 Of Jack PCB and IC801
Check the connection between
No
IC801[pin24, 29] and Power line
(FL1, PPIF2).
Check the connection between
No
IC801(Pin21,22) and IC601(Pin16,17).
Check IC801 peripheral circuit.
No
Check the connection between
IC801 and output jack.
CVBS (Pin12 of CON2)
Trouble Shooting
5-3