Question about Adcom GFA555 Amplifier

1 Answer

I have an Adcom GFA 555 type II that won't shut off when the power switch is turned off...I'm assuming a relay problem?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,594 Answers

Hi,
please replace power switch to solve amplifier problem as power switch internal contacts seems stuck and does not disengage to turn power Off.
Thanks.

Posted on Mar 19, 2011

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that 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.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I want to bridge 2 adcom GFA 555 amps to my sony DA7ES any suggestions


Obviously you are going to use the Front pre-out's on the Sony to drive the Adcoms. its pretty straightforward, just do not use a speaker that is less than 8 ohms. and make sure that you always have the power switch off on the adcoms, let them sit off for 5 minutes, THEN hit the bridge switch on the back of the adcom's and follow their instructions for bridging. it's pretty easy and tough to go wrong. Good luck...Rob

Apr 18, 2015 | Adcom GFA555 Amplifier

1 Answer

Can I run two stereo amps from same preamp?


yes, and do tell, what speakers are you powering with these amps?

Jul 09, 2013 | Bose 901 EQ1915 Home Equalizer

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

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

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

Not finding what you are looking for?
Adcom GFA555 Amplifier Logo

Related Topics:

223 people viewed this question

Ask a Question

Usually answered in minutes!

Top Adcom Audio Players & Recorders Experts

 Grubhead
Grubhead

Level 3 Expert

5017 Answers

Computer Links

Level 3 Expert

2385 Answers

Greg Cann
Greg Cann

Level 3 Expert

1114 Answers

Are you an Adcom Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...