Question about Adcom GFA-5802 2-Channel Amplifier
Hello problem solver!
I own a adcom gfa 5802 2 channel power amp (Home audio). I bought it off a friend who did not want to spend the money to fix it. I'm pretty good with a DMM and a soldering iron. I did a couple of checks but nothing came up conclusive. Any idea where i should be checking for these issues?
It was funny to read this post because this amp has MOSFET output transistors, so there is no BASE and it is difficult to test them by the meter. Also the amp has huge power capacitors @+-80 volts rail and any experiment like "lifting the base" could cost you burned board or $250 in parts per channel. I think the best way is to bring it to an repair shop.
Posted on Feb 24, 2009
Remove the output transistors and measure each of the sets of 3 pads and report the voltage readings here. I suspect that you have either a blown driver circuit or output transistors. The voltage readings will give me an idea on where to start looking for specifics.
Posted on Nov 12, 2008
Have you check the fuses? if blown you need the check the amplifier for damage parts
Posted on Mar 12, 2016
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