Reddit:Electronics

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I was looking for a place to put this where it would be sufficiently on-topic. I hope this sub is the place? I have the above named amp. It had been working (and powered up 24x7) for many years. After a 3 hour power outage recently, it would not power on.

Searching online found many folks mentioning C196, a 220uf 35v cap as the likely culprit. Being powered on 24x7 seems to be a factor in failure as well, but then again, the amp is usually a top choice for installed commercial sound.

Seems like the cap is under voltage rated, at least one person measures ~36v across it. I was told to use caps with a voltage rating of about double the actual circuit voltage in order to be safe.

Long story short, I pulled C196, it failed out of circuit testing, so I replaced it with a two-dollar 60v 10% 220uf cap. That was it, amp works and it's back in production.

Just thought I add my experience as this is yet another case of an apparent weak point in the design of an otherwise very nice amp. TY very much.