Arcade CRT vertical scrolling

zelsphere

Timid Neo Newbie
Hi guys,

Been following the forum for some time now, so I thought it was time to make an account :)

I have a problem with an old arcade crt monitor which scrolls the screen vertically.

I've changed the caps, resoldered the connections and even changed the vertical transistor but nothing seems to help :(


At the end of the video you can see if I just put my thumb on the vertical adjusting knob it stops scrolling, but starts scrolling again when I remove my thumb.

Do any of you guys have any ideas or tips on how to fix this??

Thanks for reading :)
 
Last edited:

pulstar

Mickey's Coach
It might be worth trying to clean the pot with some contact cleaner. Also check for dry joints on the of the bottom of the vert-sync pot and re-flow them if necessary.
 

zelsphere

Timid Neo Newbie
Thank you for your post pulstar :)
I went and bought a brand new pot, unfortunately it didn't change much :(

Any other ideas??
 
Top