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I have a small fuse is blown on the right hand side of my adcom 5300 per amplifier in the front next to aa small ransformer.What are the specs for it

Posted by andre furtado on

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dunnbiker

David Dunn

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SOURCE: Adcom 5300 thermal protection light

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/

Posted on Apr 03, 2011

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Fuse

Fuses blow when there is an overload. The overload is often caused by a short-circuited semiconductor, such as a transistor. More often than not it is one or more of the main power amp devices located on a large heat-sink.
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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.
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My adcom 5400 amp is causing distortion in the left and right ouputs. it started doing this the other day after a lot of music playing. i wanna know whats wrong with it

THE AMP HAS 4 FUSES INSIDE, 2 PER CHANNEL. YOU NEED TO CHECK THESE FUSES. BE CAREFULL, HIGH VOLTAGE- UNPLUG POWER CORD AND LET THE AMP STAY FOR COUPLE HOURS. REPLACE ONLY WITH PROPER VALUE FUSES 5AMP. IF BLOWN AGAIN, NO MORE ATTEMPT TO REPLACE - YOU NEED TO SEND IT TO REPAIR FACILITY LIKE THIS
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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.
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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/
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It's almost certain the two are connected. I suspect that one or more of the devices on the heat sink has shorted (acting like a piece of wire) and has blown the fuse.
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Any special tools need to replace out put transistors?

Adcom systems in general are compact and not the easiest to work on. There are no specialized tools required. Just be careful as there can be wires that are short that can be damaged. Make sure that the driver circuits are OK prior to jsut replacing the outputs. If you don't you may just blow the replacement parts as well.

Dan
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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?
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I don't have experience with the 7500 but I had a 7000 with multiple bad channels (red light lit). The problem was bad filter capacitors on the amplifier boards. The large black filter caps (two per channel) were leaking on every amp board. Its a relatively easy repair if you can solder.

FYI you'll probably need a set of small hex head drivers to open the unit.
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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
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