Zenith Avante Issue

[TinCanAlley]

Originally Posted by Electronic M

If the pull in moves vertically change the PS filter caps. The contrast issue could also be intermittent video output transistors...I had that with the RGB outputs.

It pulls in from the sides, so horizontally. It is more of a twitch and doesn't pull in so far that you see black long the edge of the CRT. I really have to capture it on video. I think I will setup a cam tomorrow and see if I can capture it.

[Electronic M]

Originally Posted by TinCanAlley

It pulls in from the sides, so horizontally. It is more of a twitch and doesn't pull in so far that you see black long the edge of the CRT. I really have to capture it on video. I think I will setup a cam tomorrow and see if I can capture it.

I know it pulls in horizontally! What I meant is if the horizontal pull in also moves vertically (ie what should be a straight fence post on screen has a wave running down it's side) then it is an electrolytic problem.

[TinCanAlley]

Originally Posted by Electronic M

I know it pulls in horizontally! What I meant is if the horizontal pull in also moves vertically (ie what should be a straight fence post on screen has a wave running down it's side) then it is an electrolytic problem.

Okay, I think I understand. If there was a fence post standing vertically, then when it happens, it wouldn't be visible on the edge of the post for the entire length of the post. So when the pull happens, it is at random points on the screen edge. I hope I'm getting this right. More reason for me to capture it on video.

[TinCanAlley]

Okay, I finally caught it while recording. I have slowed it down 50% so you get a better view of what is happening. Hopefully this will be enough to identify the circuit I need to look over.

https://youtu.be/KtdCMtVamjs