Question about Adcom GFA-5002 Amplifier

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I have an Adcom GFA-5002 for my home audio system. The main zone on the great room works well but not the 3 other zones - deck, kitchen & office. The sounds cuts in & out and can sound like there is alot of static in these others zones and the problem is intermittent - sometimes the sound is great & sometimes is is impossible to listen in these zones. Any ideas on what is going on & how to fix this problem?

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  • 151 Answers

First thing to do is a Factory Reset. Google that...
Adcom GFA-5002 factory reset

Posted on Aug 04, 2015

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Posted on Jan 02, 2017

smarthome2
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SOURCE: adcom GFA-5002 is dead no lights, no anything

Check the Fuse. Unplug the AC first. If you replace the fuse and it blows again, disconnect all speakers, replace the fuse and turn on. If the fuse does not blow, chances are it is a speaker problem, Adcom builds some very solid product, I would suggest pulling the outdoor speakers and testing them.
Depending on what you are using, some outdoor speakers should never be taken out of the living room. If you still have an issue post a comment and I will help some more.

Posted on Jun 24, 2009

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Bridge adcom gfa-5500


not unless it has a Bridge switch OR you design an inverter circuit for one of the inputs. If it has XLR inputs you can try to invert pins 2 & 3 on one of them, that might work...

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1 Answer

Hi- I have a Yamaha htr 5990, I am trying to set up a 2nd set of speakers to run off zone 2 or 3 that will power speakers at the patio; but I cannot figure out how to get it to run. Any suggestions as...


to set up a zone 2 or zone 3 set up you need the yahama amps that receive the signal from the main amp, and from that zones amp, you can control that zone, If you check out page 102 of the manual, you will see where it shows these external amps that control that 2 nd and 3rd zone However, if you look at page 85 of the manual, you can just run the speakers off the main, and select B on the speaker selection, leaving main and B on will have sound coming from all the speakers, turn off whichever you want to cancel the sound in either room

Jul 11, 2011 | Audio Players & Recorders

1 Answer

I'm running two sets of speakers thru a gfs3 powered by a gfa 5300. the main speakers are on 1, the second room pair on 2. the speakers on 2 will only play when the main speakers are engaged. i recently...


Do you mean Adcom? That detail matters.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Adcom-GFA-5300-Car-Amplifiers-manual/id/582ci558/t/2/

That would mean you're trying to run two rooms with paired mono speakers and a different channel in each room. MMmm, okay.

It's a 2-channel power amp and it isn't really designed for the probable very low imedance you're providing with paired speakers on each terminal. And it has no ability to turn either channel on or off short of denying it a program input on either channel.

Perhaps if you ran one speaker from each channel into each room (impedance permitting), you would have two rooms with traditional 2-channel audio.

Mar 22, 2011 | Audio Players & Recorders

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

Adcom gfa 555 blows the 10 amp fuse and the 6 amp fuse on the far right


Any fuse blowing is caused by a shorted component in either the power supply section or main audio amp part. Follow the fuse circuit and see where it leads you. Look around for burnt of damaged parts. Suspect anything sitting on a heat sink. The most common culprit is the audio amp main transistors, especially if someone shorted the speaker leads together. In the power part it could be the transformer, the large Electrolytic capacitors, rectifier, or voltage regulator. Some amps use an IC for amplification and this can blow the fuse.

Oct 19, 2009 | Adcom GFA-5500 2-Channel Amplifier

1 Answer

Adcom GFA-5002 is dead no lights, no anything


Check the Fuse. Unplug the AC first. If you replace the fuse and it blows again, disconnect all speakers, replace the fuse and turn on. If the fuse does not blow, chances are it is a speaker problem, Adcom builds some very solid product, I would suggest pulling the outdoor speakers and testing them.
Depending on what you are using, some outdoor speakers should never be taken out of the living room. If you still have an issue post a comment and I will help some more.

Jun 24, 2009 | Adcom GFA-5002 Amplifier

1 Answer

Denon AVR 1609 Receiver Zone 2 has no sound


you have to change the power amp assignment to zone 2, you must also have Analog audio connections to the Denon from your devices.
Try this put your remote in the zone 2 mode, select tuner in zone 2 and turn zone 2 volume up to -10

Dec 18, 2008 | Denon AVR588 Receiver

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

1 Answer

No output to Zone 2 from preout to 2nd power amp for second room speakers


OK, From what I am understanding is that you both are trying to uilize a digital audio source (HDMI cables are digital audio only) and hence this is the problem. You can only use an analog audio source (connection) to utilize the audio output to zone 2. A simple soultion is to use the analog audio in conjuction with the digital. Connect the digital (HDMI, Optical, Coax) to the main zone and the left and right audios to zone 2.

Dec 22, 2007 | Denon AVR-3803 Receiver

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