Question about Adcom GFA-5500 2-Channel Amplifier

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Adcom GFA 555 Right channel quit working where can i get it fixed in fort lauderdale or close by?

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Lakes Electronics, Inc.
5245 N. University Dr.
Lauderhill, FL 33351
United States
954-749-6100

These guys are listed as one of the 2 Adcom service centers in FL and should be your best bet.
Also Jason Schatten @ Electronic labs might be able to help. Electronic Laboratory, Inc.
1301 West Copans Road, A4
Pompano Beach, Florida 33064
Phone: (954) 969-2855
Fax: (954) 969-2879
Email: Jason@ElectronicLaboratory.com


Hope this helps. Parag

Posted on May 10, 2009

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Did you check the fuses in side the amp?

Posted on May 03, 2009

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Adcom GFA 7500 problems


My right channel went out on my GFA 7500 and the problem was TWO blown internal fuses. Each amplifier inside the GFA 7500 has two fuses. In order to get to the fuses you must first take the top of the amplifier off by removing the screws using an allen wrench. Then put the top back on.Turn the amplifier over and remove most of the screws from the bottom to access the fuses in the bottom of the amplifier. There are two different size allen wrenches on the bottom. Be careful to not drop a screw inside the amp and make sure you line up the screw holes that hold the amps using a small screw driver to push the amps into position. I replaced all the fuses on the top and the bottom. AdCom sells the fuses on their site.

Jun 11, 2012 | Adcom GFA-7500 5-Channel Amplifier

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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

2 Answers

On the inside back wall of the 1986 Adcom GFA-555 Stereo Power Amplifier there are four fuses,two for each channel. Would you tell me please, what amp fuse they are and if they are the fast or slo-blow...


Sorry to contact you this way but i've spoken to an older colleague of mine and it appears that before 1992 in the Adcom GFA-555 they were using bipolar transistors and the amp was rated fo a minimal impedance of 4 ohms - not like in the newer ones that have MOSFETs and are rated for 1 ohm in bridge mode. So the fast fuses that you need are of 6 amps , not 20 like in the newer models.
Sorry for my mistake.

Jul 11, 2010 | Audio Players & Recorders

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

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

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

How to bridge GPA 555 adcom amp from 8 om to 4 om


First of all, when bridging an anp, the impenence that it can handle usually goes UP not down. I don't believe that the GPA555 can be bridged without circuit modification.

Dan

Feb 11, 2009 | Adcom GFA-5400 2-Channel Amplifier

1 Answer

Adcom input jack replacement


The input jacks on a 555 are a standard gold plated, high quality jack. looking around the net, you should pay no more than 7-10 dollars each ( or just get originals from Adcom. ). What is your comfort level with electronics?. Can you solder properly?. I cant answer this without more info.....thanks...Good luck...Rob

Dec 30, 2007 | Audio Players & Recorders

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