Arcade CRT vertical scrolling

zelsphere

n00b
Joined
Sep 1, 2016
Posts
3
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
10 Year Member
Joined
Jun 6, 2011
Posts
578
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

n00b
Joined
Sep 1, 2016
Posts
3
Thank you for your post pulstar :)
I went and bought a brand new pot, unfortunately it didn't change much :(

Any other ideas??
 
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