Samsung DVD-R157 Service Manual page 29

AV2 CVBS Video Input Error
Has about p-p 1V level?
Has about p-p 1V signal?
Samsung Electronics
Pin 28 In IC801
Yes
Pin5 In IC801
Yes
A
No
Check the connection between
Pin 28 in IC801 and L2 Pin-Jack.
No
Check Pin 24, 29 in IC801
of input power(5V).
GCLK (Pin5 of Main VIC1)
Trouble Shooting
5-5