Question about Adcom GFA-5500 2-Channel Amplifier

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I have an Adcom GFA-7807 and the thermal protection is engaged when the unit is switched on. It doesn't allow the unit to run....any ideas?

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Posted on Jan 02, 2017

petraman7
  • 1175 Answers

SOURCE: Adcom GFA-7400 power amp; 1 dead channel (thermal protect LED on)

Hi...

I've contacted ADCOM before and they sent a pdf of the electricals

http://www.adcom.com/default.aspx

also try:

www.stereomanuals.com

Posted on Apr 17, 2010

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1 Answer

How do you connect wiring to bridge an adcom gfa 5300?


The manual does not specify a bridging option.

http://www.audioreview.com/cat/amplification/amplifiers/adcom/gfa-5300/prd_116265_1583crx.aspx

"Weaknesses:
Not bridgable."

Generally an amp that IS bridgeable uses the positive speaker terminals and some switching method to tell the unit to run as bridged. This is NOT a recommendation to try it on the 5300.

Aug 02, 2011 | Adcom GFA-5300 2-Channel Amplifier

1 Answer

I am looking for the fuses on an Adcom GFA 7807. The amp has no output on some of the channels.


Fuses aren't channel-specific; it's all on or all dead fuse-wise. Maybe you have dead / improperly connected speakers, source connection issues. Track it back or swap source channels and speakers to isolate.

Jul 24, 2011 | Audio Players & Recorders

1 Answer

One channel thermal overload stays lit and no output from that channel. even after unit sits overnight, thermal light on immediately,unit not hot. Looking for schematic?


Red light is on if:
- thermal protection, overheated amp, bad thermo sensor
- DC at speaker terminals
- high current at output transistors
Also could be a protection circuit malfunction.
In any case you need new channel module or send your module or whole amp for repair here.
Thanks,
Paul

Jul 12, 2011 | Adcom GFA-7607 7-Channel Amplifier

1 Answer

Adcom 5300 thermal protection light is on right side all fuses are good


Is it actually getting hot? If so, make sure it's getting the required ventilation and that you're not over-driving it. Page 5...

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/

Apr 03, 2011 | Adcom GFA-5300 2-Channel Amplifier

1 Answer

Adcom GFA-7400 power amp; 1 dead channel (thermal protect LED on)


Hi...

I've contacted ADCOM before and they sent a pdf of the electricals

http://www.adcom.com/default.aspx

also try:

www.stereomanuals.com

Mar 30, 2010 | Adcom GFA-7400 5-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

2 Answers

Adcom GFA 5500 right channel emits horrible sound. Broken highs and no bass. Is is repairable by a semi amatuer?


Adcom makes a great amplifer! Usually broken highs and no bass means blown speaker. Try hooking it up to a completely different input source. Try different speakers also. If problem persists, check the fuse. Most will have a fuse on the back you can screw out. Some have two fuses (one for each channel) If this doesn't fix the problem it could be expensive to fix. Also, does this model ave the thermal protection light and if so, does it come on at all?

Jun 22, 2009 | Adcom GFA-5500 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

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