Unseen new symptom in 988 esl...fading

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This is happening in the one speaker that had not given any problems. Music fades out and in. It starts playing ok and then the volume fades, then starts again like in a cycle. I do not believe it might be a bad panel issue maybe something to do with the electronics, any orientation will be appreciated
 
A clamp circuit problem with be instantaneous. Since it's happening slowly, my money is on a high voltage supply problem. I'd give the MOV in the front end the stink-eye.

I suppose the polyfuse could be going, but I've never seen one exhibit that sort of behavior.

Hope that helps,
Sheldon
quadesl.com
 
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