Star Wars horizontal jumps

Altan

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Turned on my Star Wars and the image was jumping in size but only horizontally.

Thought it might be some pot issue. I took a look and found this on the deflection board. See r24 and r25

ImageUploadedByTapatalk1335823365.720644.jpg

Is this after market?

After spinning it back and forth a few times, the problem seems to have gone away.
 
The width pots were aftermarket, they are all like that, on most beige and green boards (I have 1 blue board with it too)

It's a good idea to replace the pot (10K ohm), as the moving of the pot is probably only a temporary fix :)
 
The width pots were aftermarket, they are all like that, on most beige and green boards (I have 1 blue board with it too)

It's a good idea to replace the pot (10K ohm), as the moving of the pot is probably only a temporary fix :)

Is it a standard 3 leg pot? I'm not able to check right away...

Do these from Bob look right / appropriate?

r76r79.jpg


I know it's not for the same resistor jumps...
 
I always replace them when working on an Amplifone deflection board.
Yes those are the correct ones from Bob.

Here's a video I made a long time ago about the effects this has:
 
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