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My amp i bought a gemsound amp a 3955 my problem is that when i trun it up it brun the fuse on the back under the electric wire

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Where is your location my friend? did you check your amps power input requirements. you may be having the wrong voltage supplied to your amp. unless there is a defect on the amp unit you bought otherwise check your voltage settings first

Posted on Aug 13, 2008

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The right side Pitch slider knob is broken on my GemSound CMP 1200 MIDI. Can it be repaired and what will it cost?


When you say "broken" do you mean the entire slider or just the knob? Because if it's just the knob, you can just take it to an electrical parts shop such as Maplin (UK) or Radio Shack (USA) and find something similar or that matches it. Ask the assistant if for help if you can't find it. If it will fit, but doesn't match, buy two so that you can match them up. They shouldn't be expensive.

If the controller is broken you might have to find a dealer who repairs that brand. As it's not a widely known brand you might have to pay a bit more, being less competition around.

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A diode/rectifer or voltage stabliser, or leaky capacitor in the power supply.
Also the main transistors in the power amp or if it has an output IC - that!
If you can in anyway disconnect the power supply section from the amp circuit, you can isolate which part is faulty. For if it blows when disconnected from the power amp, you know it's just the power supply that's gone. And if it does not blow - then it's the amp!

Aug 24, 2009 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

Gemsound XP 550 blown fuse


This is a standard amp design which should be a relatively simple repair. The output transistors are probably shorted. Check those first. Second, check the rectifier diodes in the power supply. Usually there are protection circuits that will prevent the fuse from blowing if the outputs are shorted.

Let me know your progress. I will attempt to get the service manual for this unit to get you more details.

Dan

Jun 29, 2009 | Amplifiers & Preamps

1 Answer

GemSound XP-550, worked great for about 2 hours


The outputs are probably blown. This should be under warranty. Return it for a replacement.

Dan

Jun 29, 2009 | Amplifiers & Preamps

1 Answer

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Hi...
If it's a straight-up power switch then it will need to be replaced if it works off a relay then the relay is gone.

website

http://www.gemsound.com/contact.html#


Mar 24, 2009 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

Amp keeps blowing speakers


If the amp blew the speakers , it sounds like the amp pumped HIGH levels of DC voltage into the speakers.

Get another amp and not Behringer,not Pyle,not Gemsound and not Numark.

Feb 02, 2009 | Behringer EUROPOWER EP2500 Amplifier

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Manual


Contact Gemsound thru their email.

Sep 04, 2008 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

Gemsound power speaker pxa105


First,
Disconnect any input cables from the amp. Turn down the volume controls and disconnect the speakers. Power back on. If you still blow fuses with nothing hooked up, have the amp fixed.
If the fuse holds, shut down and connect the speakers, leaving the volume controls down. Power up and see if your fuse holds. If you have hum, an output transistor is most likely shorted. If you have no noise, SLOWLY turn up the volume controls and listen for the hum. If all is quiet, turn down the volume controls and connect your input cables and turn the volume back up. Noise? check your cables!
Mister Phil

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2 Answers

Gemsound EXA-3955 Right Channel Problem


you sure you didnt flip the bridge switch on the back? its the tiny little black switch under the bridge output plug, if you have it set to "bridged mode" any input sent into the right channel produces only a hum, only left channel input works.

Apr 04, 2008 | Amplifiers & Preamps

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