re Samsung TVCR 346
 

This a 34cm TV / VCR combo my wife is very fond of

Two lines 1" thick rolling down the screen (separated scan). , maybe
Retrace lines or bands rolling down the screen.

We suspect its a electro in the vertical, but what is the best way just
looking at the PCB which is the vertical section. I think the switch mode
supply is obvious, then theres the tripler and a HOT nearby but what would
be around the Vertical drive section ??

re Samsung TVCR 346
 

Fred wrote:
This a 34cm TV / VCR combo my wife is very fond of

Two lines 1" thick rolling down the screen (separated scan). , maybe
Retrace lines or bands rolling down the screen.

We suspect its a electro in the vertical, but what is the best way just
looking at the PCB which is the vertical section. I think the switch mode
supply is obvious, then theres the tripler and a HOT nearby but what would
be around the Vertical drive section ??
Sounds like you have AC hum from bad capacitor(s) in the power supply.
Does it run on battery? Try it. If not, test caps or just replace the
electrolytics in the power section.