20 Most Recent Denon AVR-2500 Receiver Questions & Answers

Here is Service Manual for help Preview Service Manual : DENON -AVR-2500-Service-Manual Denon-AVR-2500-Service-Manual.pdf, DENON Audio AVR-2500 Denon-AVR-2500-Service-Manual.pdf (eserviceinfo.com)

Denon AVR 2500 Operating Instructions Manual

Any speaker wire from an electronic shop will do the job. The bigger the wire core (dia) the better. Talk with the techie for more advice.

There is a internal problem with it, It is impossible to fix it with out haveing to replace certain things in it,

Suggest turning the volume down on the Receiver/Amp before changing modes. Changing modes can produce signals that can hurt speakers if driving at mid-high levels.

Regarding the sub, turn off the receiver first, then turn off the sub. When turning everything on, turn on the sub first, then the receiver. If you still hear the noice in the sub, turn down the volume in the sub before turning it off (making note of what volume level you prefer for it when it is on).

unhook everything going to it, including the speakers,, then turn it on, if you get the same thing, its going to have to be taken to a tech to probably replace the output transistor

Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Is that outlet is the only circuit on that breaker?

The receiver may not have exceeded its own internal parameters to blow the fuse or enter protection but it (and whatever else is drawing power from its convenience outlets) may have exceeded the rating for your wall breaker.

There is a modest limit on how much extra current-drawing equipment can hang onto the back of this unit. It's probably printed near the outlet(s). Probably 100 watts max.

In general, nothing heavy duty like heaters, amps, vacuum cleaners, TV's should not be plugged into the receiver.

More than likely the power supply has gone bad. I do not know if Denon uses a switch mode power supply or a linear supply. One way to tell is the weight of the amp. Heavy = linear supply and light = switch mode. Common problems with switch mode supplies are the FETs used for switch or the PWM generator (pulse width modulation generator) Linear supplies more than likely would have a bad bridge rectifier or shorted bypass cap on the DC rail.

Hi jornmuller
On your amplifier you can use speakers ranging from 6 to 16 ohms(front speakers) with output A and B used separately.
For the rear and center speakers you can use speakers ranging from 6 to 12 ohms.
So your speakers are fine to use on that receiver.
Hope this help. Merry Christmas

The Denon 2500 was one of the best ProLogic receivers built, it was a work horse and very little ever went wrong with them.
To make sure you're only supposed to hear right & left speakers, press the Stereo button on the remote. Also recheck your speaker connections - this is the single most overlooked connection problem folks have.
Check the balance control to make sure it's in the center position

Make sure the Tape Monitor is not engaged.

Then, check to make sure that the Pre-Out, Main-In jumpers are connected properly on the rear panel.
If that is not the problem, try pressing the Tone Direct button on the remote (aka Tone Defeat on the front panel).

Your audio amplifiers IC's are damaged you gotta send your device to a repair center.Good luck.