autohelm navcenter st50 question

[atlowers]

the screen starts to roll after short time running. Any ideas as to cause? thanks

 

[hightech]

It is like an old TV, needs the horizontal hold adjusting. need to take the back off and find the correct bit on the video PCB. Used to see this from time to time in the factory many years ago.

 

[atlowers]

Thanks Hightech, will give it a try assume it is an old style pot resister which I can give fit a tiny screw driver to.

 

[hightech]

I seem to remebmer it being a pot on the edge of the board. Also, there are not too mnay on the pcb, so tweak each a bit and see what happens, remembering where yu started from if it makes no change or gives a different problem!