Samsung DSB-S300G Service Manual page 23

Troubleshooting
Composite Video signal Missing
(SCART Connector)
Check ΠCVBS input
Check ´ CVBS at 4pin
Check ˇ CVBS at
44pin of U701
Check CVBS at
19pin of Scart Connector
Check Failure mode
of J801 SCART Connector
5-4
No
at R713
Yes
No
of U701
Yes
No
Yes
No
Yes
Check Failure mode U302
Check Video filter circuit
(C756,L708.C763,C773, R736,L715)
Check Failure mode of U701
Check R806,R812, ,C809
ΠCVBS input at R713
´ CVBS at 4pin of U701
ˇ CVBS at 44pin of U701,
Samsung Electronics