Question about Behringer EUROPOWER EP2500 Amplifier

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EP2500 amplifier - The channel B "clip" and "signal" led's blink rapidly, and an oscilloscope on the output shows an oscillation at about 17 Hz when the low cut filter is "on". When the filter is turned "off", the output is normal.

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There are Triacs at the outputs for protection and bilateral trigger diacs. I just replaced some in a peavey amp..Thats most likely the probelm

Posted on Sep 14, 2010

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The Amp clip light is always ON only the left channel and the same channel is not functioning by giving sound, please help


I looked at a schematic for EP2500 which is same but has a lower buss voltage than the EP4000. Below, the drive signal to the power stage is full wave rectified to illuminate the LED, d-c is presented to the LED if R128 & R138 has an a-c return. There is a line that can push-up the a-c return. It goes off to a connector that is unknown. I suspect the push-up voltage is not there. It could mean anything. I think its coming from the main transformer, Check for blow fuses.
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Also the speaker output is protected with a "Crowbar" circuit. It is simply a Triac device (light dimmer) or two SCRs to prevent d-c from shorted output devices being applied to the speakers. which would cook the speaker coils. This may be activated when amp is turned on. Then there is the possibility of the output power devices - one or more shorted.
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The amp needs to be checked out by a repair technician.

Feb 04, 2016 | Behringer EuroPower EP4000 2Channel...

1 Answer

Hello ! one channel to have any high frequency oscillations. After few sec after ON , LEDs TEMP & ACS and relay disconnecting speaker . Regards Jerzy Purtak


One of your op amps is probably gone or there's a bad capacitor somewhere.
Get an oscilloscope and trace the oscillation from the output back towards the input.
When you see clean signal on one side and oscillations on the other side of an op amp, that op amp will need to be replaced OR if you see bulged or leaking capacitors around / connected to that circuit, they will need to be replaced.
Also look for damaged driver transistors between the clean and oscillating signal.
A schematic will be extremely helpful in these situations!

Jul 21, 2011 | Crest Audio CC 1800 2Channel Amplifier

1 Answer

Clipping the channels


The manual discusses the Clip Inidicator and how to deal with clipping.

Clipping in this amp isprimarily a function of the input signal being distorted so the input level is recommended to be lowered. Beyond that the cause of input distortion would have to be addressed in the device producing it.

http://www.retrevo.com/support/Behringer-EP2500-Amps-manual/id/23281ci655/t/2/

Dec 30, 2010 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

Both fuses burnt and both clip and signal led on? seems to have full power behringer ep2500


Suspect an overload in either the power supply section or the devices on the main heat sink. In the power supply you are either looking at a transformer problem or semi-conductors associated with it. However since the clip and signal lights are on, I would go to the amp devices on the heat sink. If they are transistors test them with a Ohm Meter on the 1K setting in circuit even! You will soon notice which ones are gone! The meter will show like you had touch the test probes together!

May 15, 2010 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

Attenuated output


Since you are able to view the output i'm assuming you are using an oscilloscope and only the positive or negative half of the sine wave is displayed. The output stage will be using a complimentry pair of output transistors, one amplifies the positve half cycle the other the negative. These are driven by a driver stage (phase splitter). One side is not amplifying. First measure the pos' and neg' LT supply rails. If ok check
ouput transistors with analog Ohm meter for base / emitter / collector continuity. If the amp uses an output IC and LT supplies are ok then use scope to view input signal, if input ok but output bad then IC is suspect. Since both channels are affected your problem is most likely a missing LT supply rail.

Mar 29, 2010 | Adcom GFA-5400 2-Channel Amplifier

1 Answer

Both fuses burnt and both clip and signal led on? seems to have full power behringer ep2500


The fuses have blown due to a short circuit, ie some part acting like it was a piece of wire. The chances are (with the LED's showing) it's the main amp semiconductors (on the heatsink) that have gone. The cause is either connecting a wrong (unsuitable) speaker(s) for the job, or letting the two wires (to each speaker) touch each other.

Mar 28, 2010 | Behringer EUROPOWER EP2500 Amplifier

2 Answers

Does anyone has overheat problem with Behrigher EP2500 power amplifier? We had the amp for abut a year. The amp. has recently become overheat (hand burning) after 30 minutes operation. We set the gain to...


The last time I had a problem like this there was a defective transistor in the from end that was generating noise in the 30K range. Too high to hear and too high for the speakers to reproduce, but enough to put quite a load on the amp. Does this occur even with no speakers attached? If so, then put an osciloscope on the outputs and look for signals. WIth no input, there should be no output at all except for a little noise. You can also see if there is any DC on the outputs as well.

Please update this with what you find.

Thanks,
Dan

Oct 13, 2009 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

Channel 2 Distorted/Clip light comes on


It sounds like the final amplification section is OK now. I'd be looking for a noisy transistor or transistor pair at the "front end" of the unit. There may also be a shorted coupling cap between the stages. If you can Email me the schematics, I can provide more details.

Dan

May 27, 2009 | Behringer EUROPOWER EP2500 Amplifier

4 Answers

Behringer amp


Hello pare ko.
EP2500 is a pro amp, manufacturer says that. Notorious to me.
Got 5 of these for repair. Clip is of course cause by too much
signal from source. If the amp is still clipped or on protect even w/out
signal in, time to open and do repairs inside. usually a MOSFET
inside P50N06 (50V-60A) is kaput. or MJE15033G and MJE15032G.
Now if blowing main Fuse, main txistor 2SA1943/2SC5200 maybe gone.
Read carefully the setting of your dip switches setting at the back.
This amp can drive 750 watts/ch@4 ohms.

Good Luck From Siliconchip

Nov 11, 2007 | Behringer EUROPOWER EP2500 Amplifier

2 Answers

Behringer EP2500 no output on CHANNEL 1


check all op amps for correct voltage swing +-should be equal,test output of op amps no voltage should be present, use chasis gnd as tester neg.check voltage regulation especially 12v or 15v +-.note some amps show unequal led indications when only 1 channel connected to a load.I will try to get some more info on this specific amp because i don't know this circuit well,keep in touch as you update though.

Aug 21, 2007 | Behringer EUROPOWER EP2500 Amplifier

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