Question about Denon Audio Players & Recorders

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You switch the amplifier on and then it switches itself off after 10 seconds

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  • sparkey714 Jun 13, 2008

    Denon avr-1508 goes into protect mode. Troubleshoot guide says it's a power source problem. I have tried multiple different outlets but no luck. supply Voltage/amperage are all good. Any suggestions ??

  • corey_hitman Oct 15, 2008

    hi there i have maybe used my denon avr-485 2 or 3 times and not even very loud and now when i goto use it it turns on as u say and the stand by kicks in after only 10 seconds WHAT DO I DO ?

  • elcaballo Feb 19, 2009

    AVR-2800 5.1, cuts off after short period of time playing.



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This unit is in protect mode that shuts down the amp section to prevent further damage. Please post the make and model so that I can provide details.

Posted on May 19, 2008


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Hi my amp when i switch it on within 3 seconds it automatically switches off?

That's the protect circuit kicking in.
The rec'r will require service. Either a couple of power supply capacitors have gone bad or one of the power amp modules has quit.

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My amplifier


The "switched off by itself" is indicative that the auto-protect is acting. Auto protect senses that there is something wrong within the unit and rather than the damage extend to other areas, it simply switches the entire unit off. On some models, this also hold true if there are no or faulty speakers connected to the receiver. In others, this happens when there is no intelligent signal received such as in FM when an antenna would be required.

If you have verified that it is not poor signal, speaker problem, then perhaps your best bet would be to seek the services of a qualified audio technician since this would involve electronic circuitry/component diagnosis, soldering and the use of a DVM.

hope this be of some help/idea. Post back how things turned out or should you need additional information.

Good luck and kind regards.

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From the above symptom, it show that the output stage of the amplifier have some problem.The protection cct come in to cut off the amp. when the output shorted or have Dc voltage.( this is to prevent further damage to the amp. & speaker ).If you know how to repair , just check on the pwr transistor (with heat sink )or else send it to the repair center.hope it help.

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