Friend has a Carver PM350 amp. It was shutting down after a while, I thought maybe because the fan was running very slowly from being dirty and covered in greasy gunk and dust. I removed the fan and motor, disassembled, cleaned and lubed, and now that works fine.
I noticed that it turns on and works fine, sounds good, until switched off.
THUMP!
YIKES! It's a LOUD one. I called him and he said, "Yeah, forgot to tell you I always unplugged the speaker before powering it off, because of that". The volume level makes no difference. As mentioned, there is no turn-on thump.
I put a voltmeter across the speaker out terminals, set to DC. It idled at pretty close to 0 volts, and when I switched it off, it jumped quickly to ~50V, then slowly diminished.
Ideas, anyone? Can't find a schematic to download.
Thanks,
Brad1
I noticed that it turns on and works fine, sounds good, until switched off.
THUMP!
YIKES! It's a LOUD one. I called him and he said, "Yeah, forgot to tell you I always unplugged the speaker before powering it off, because of that". The volume level makes no difference. As mentioned, there is no turn-on thump.
I put a voltmeter across the speaker out terminals, set to DC. It idled at pretty close to 0 volts, and when I switched it off, it jumped quickly to ~50V, then slowly diminished.
Ideas, anyone? Can't find a schematic to download.
Thanks,
Brad1
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