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It burns all the outputs ,wats the problem - Audio Players & Recorders

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This is due to severe short circuit which draw a lot of current and cause burning -check your speaker cables for short circuit or speakers for short coil.

Posted on Jul 17, 2008

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1 Answer

Output transistors burns when switch on power


What make is your unit? Did you get it fixed yet?

Sep 27, 2014 | Audio Players & Recorders

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I have an EP2500, which burns speakers. I connect with a lamp in series, and when it receives high frequency signals, lights the lamp, the output looks correct, but consumption is increasing dangerously....


There was an suggested solution here for your problem.

There are electronic components which seems to be undiscoverable

for a moment.


• The fault could be anywhere from the differential input stage

to the VAS circuits.

• One has to check thoroughly components , and proceed

troubleshooting without the power transistors connected.


• Check for offset voltage on each of the main amp output.

• Check for idling current


A good amp never produce an over of 0.7V on its output.

Jul 30, 2012 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

I want to connect Max 2500 with 6 JBL Control 28 speakers 175 watts @ 8 ohms each... please suggest what will be the best connection...series or parallel


first is how u want to run the amp itself ....... the MAX2500 can run in mono (bridged) output or stereo ......... though wat u want to watch is the impedance of the load really with the bridged load being no lower than 8 ohms/1500W (there's reasons for this) and the stereo load where u can have either 4 ohms/750W or 8 ohms/500W so how do u want to run this is first the question ..... all 6 on the bridged output or 2 off each channel (though running 3 would make for complicated impedance load) ..... so u'd run 2 in parallel for a 4 ohm load with 300 watt requirement from the amp and u can drive them to 1.5 times their rated RMS figure so a nice 500 watts :)

Feb 07, 2012 | Phonic MAX 2500 Amplifier

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Low output on LH channel and destorted. Clip light on on LH channel. There's no component on the board burned or poped


This sounds like the output section has failed Open rather thans Shorted. You are essentially driving the speakers with the "driver" section rather than the final output stage. This unit will require benchtime to trace the problem and fix it. This is not a problem that can be completely diagnosed remotely. Where are you located?

Dan

Aug 20, 2010 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

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Your amplifier is having a serious fault within preventing further damage to the amplifier. If could be a failure of the output mosfets, failure of the predriver, failure of the bias to the output mosfets, short inthe speakers- check this out- fault inthe error amp section for wrong current indiication or malfunctions in the mother board. All of this will need careful location of the fault by checking ont these stages. Porceed only if you are competent or seek help. Good day

Jun 28, 2010 | Infinity 468W Class AB Bridgeable...

1 Answer

Marantz SR19 no sound?


When replacing output transistors on amplifiers it is generally a good practice to replace the output capacitors as well as the biasing resistors. Just because one transistor is bad does not mean that that is the whole problem. Look for what caused the problem. Bad speakers,bad wires,defective traces on circuit board,poor soldering. Also when mounting the transistor make sure it is insulated and grease it with a dab of silicone heat sink compound. Whenever I service a board I examine all components for tolerance as well. A resistor marked at 1% tolerance,example 1k ohm + or - 1% should read no less than 990 ohms and no more than 1010 ohms. Anything else your asking for trouble. Another point is that some amplifiers use matching pairs. Pairs complement each other in an output stage and must be replaced in pairs. I repaired a Sansui Amplifier a while back and it looked as if a power output resistor was burned. Comparing the two channels I figured the matching value from the other side and replaced all of them and the system has worked flawlessly for years now. I am a retired electrical engineer and have worked in a few areas of electronics for over 35 years. Hope this information helps you.   

May 06, 2009 | Teac A-1D 2-Channel Amplifier

1 Answer

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Take a ohm meter and measure resistance from emiter to collector should have a few kilo ohm on output transistor.
If no ohm meter available , remove output transistors from circuit.
note position of transistor . you have a NPN and a PNP for each channel.
Replace fuse and power up. If fuse blows check bridge in the power supply.

80% of the time output transistor burn and blow the fuse.
before replacing output transistors check driver transistors they probably burnt also

Apr 29, 2008 | NAD C350 2-Channel Amplifier

3 Answers

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The main power transformer may not have the correct voltages coming out of it. I would check the output volts at the terminals. I would also check the out puts from the solenoids.
GOD LUCK
BIG RED

Jan 25, 2008 | Marantz MM9000 5-Channel Amplifier

1 Answer

Hooking up 2 speakers to 1 speakon output


Power Output (1 kHz*) Stereo Bridge-Mono 8 Ohm 4 Ohm 8 Ohm XLS 802 500W 800W 1600W XLS 602 380W 600W 1200W XLS 402 300W 450W 900W XLS 202 200W 300W 600W *1 kHz Power: refers to maximum average power in watts at 1 kHz with 0.5% THD. It depends on the impedence of the speakers. Carfull as you could burn up this amp if you exceed the resistance rating on it. Go here on all of the specs of this model of crown amps. http://www.crownaudio.com/amp_htm/xlsspec.htm Good Luck

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