Question about Adcom GFA-5802 2-Channel Amplifier

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ADCOM 5802 ON/OFF SWITCH

Good Morning! My name is Alex Gibber I am looking for an advice on Where can I get a replacement fly-away board for the front panel ON/OFF switch, for ADCOM GFA 5802 power amp? When I was moving, the movers put the amp in a box, and during the move, it pushed the toggle of the front switch in. When I tried to turn it on (without noticing that the switch was damaged), it burned the R104 resister on this board. I think it may be easier to replace this small board that replacing the switch and the burnt resistor. Can you please help me locate this sub-assembly. Many thanks, PEACE, Alex

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petraman7
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SOURCE: Looking for a repair or service manual for ADCOM

If you're friendly about it , the folks at ADCOM will probably give you a schematic
Call and talk to tech support

Posted on Dec 01, 2010

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SOURCE: Looking for a repair or service manual for ADCOM

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Posted on Jun 25, 2015

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Hi my adcom 5802 get right Chanal not working . I don't know why every time I put 2 fuse for that Chanel is burn st thing look like diot ... And after that 2 fuse burn too


If I can read you right you are saying that the device keeps blowing the fuse?

Fuses blow when there is an overload. As it is an amplifier we are dealing with the cause is more than likely a shorted output transistor or more than one, or whatever does the main amplification for the device. These devices are located on the main power amp board attached to a heat sink. If the amp has fuses for each channel then you only need to replace the devices on that channel, with the fuses blowing on it. The cause of shorted devices is often bad speaker wires or them touching.

Nov 21, 2015 | Adcom Audio Players & Recorders

1 Answer

Adcom amp 5802 running hot


It should run hot to touch at idle, about 120F, because it is MOSFET type amplifier.

Mar 23, 2013 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

Humming when no input in jack; works fine with rca inserted; worries me that somethings is not right even though works fine with RCA or XLR plugged in, right channel only


Sounds like it could be feedback hum. Is there anything near it that could cause a reaction when unpluged? Such as a turntable, cassette etc. If so move them and see if it goes away. Even then it won't hurt the amp. I think otherwise worry when there's a hum when they are plugged in. PS check any earth connections too!

Jun 21, 2010 | Adcom GFA-5802 2-Channel Amplifier

2 Answers

Adcom GFA 5500 'mechanical' hum from amplifier


Possibly. Most amps filter out line hum via low-pass filters. If you can locate a schematic, those would be the caps to check.

Apr 24, 2010 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

Hi, my name is allister. i have a problem with


Hi Allister...

Check for fuses and make sure that the speakers are solidly connected at both ends

I can suggest a repair place if needed

Mar 26, 2010 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

I turn on the ADCOM GFA-5802 amplifier... ...The power light comes on, but does not heat up nor output sound


Have it serviced. Do you know what GFA stands for. People at Adcom do have a great sense of humor. Take it only to a high end audio servicer. Contact Adcom. This is good stuff you wouldn't want a hack working on it.

Nov 23, 2009 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

Can you bridge an adcom GFA-5802 power amp?


Running an amp in bridge mode requires a specific circuit design. It is not possible to combine 2 amps in this fashion.
Dan

Mar 02, 2009 | Adcom GFA-5802 2-Channel Amplifier

4 Answers

ADCOM GFA 5802 POWER AMP NO SOUND, BUT POWERS UP.


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.

Thanks,
Dan

Nov 11, 2008 | Adcom GFA-5802 2-Channel Amplifier

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