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
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Feb 21, 2012 | Adcom GFA-5002 Amplifier
Feb 23, 2011 | Adcom GFA-7500 5-Channel Amplifier
Nov 29, 2010 | Adcom GFA-5500 2-Channel Amplifier
Jul 19, 2010 | Adcom GFA-7607 7-Channel Amplifier
Apr 24, 2010 | Adcom GFA-5802 2-Channel Amplifier
Mar 30, 2010 | Adcom GFA-7400 5-Channel Amplifier
Feb 17, 2010 | Adcom GFA-5400 2-Channel Amplifier
Nov 23, 2009 | Adcom GFA-5802 2-Channel Amplifier
Mar 02, 2009 | Adcom GFA-5802 2-Channel Amplifier
Apr 17, 2017 | Adcom GFA-5802 2-Channel Amplifier
Jun 11, 2012 | Adcom GFA-5802 2-Channel Amplifier
1,010 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: