Sanyo 20EZ falls out of sync after few hours

Rngenius

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Title says it all. After a few hours my Sanyo 20EZ will loose sync. You can bring it back by adjusting pot on chassis. A bit a annoying. Wondering if there is a permanent solution to this?
 

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I am not sure if this kit had 2 or 1. If I recall most get well kits have 2 np caps. Could it be related to np cap?
 
your horizontal hold might be just out of range, try adjusting it a hair and see if that helps.

This always helps but it will eventually fall back out of sync. I pulled the chassis and both np caps a new (located at c411 and c162). I noted there is no cap at c479. Any other suggestions?
 
caps, perhaps. I'm leaning towards cold solder somewhere, when the chassis heats up it's exposing the bad solder joints. it's been so long since I've worked on one of these I don't even remember where to look. pull the chassis and inspect the solder joints for any halos or breaks, reflow as necessary.

and get a proper cap kit for it, don't use any old Bob Roberts junk.
 
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