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I just bought a used Adcom GFA-535, and I'm having some problems with distortion in the left channel. When I first powered it up, there was a pop from the left speaker, and the "instantaneous distortion alert" light for the left channel was on. I did some listening, and there is definitely a significant amount coming from the speaker. I thought maybe it was my preamp, but the light comes on even if my IC's aren't plugged in to the amp. Does anyone have any suggestions? Thanks
Chris
Follow Ups:
It sounds like an output transistor may be failing.
Open the cover (Unplugged!!) and be sure the screws that hold down the transistors are snug. I've fixed more damned equipment this way than I can remember. If screws are not snug - the heat sinks cannot carry the heat away - and transistors go, quite quickly, into overload
"If at first you don't succeed, then skydiving's probably not for you".
It appears yer Amp came pre-broken.. suugest a technician sooner rather than later.. gnerally electronics don't 'self heal'
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