Question about Denon Audio & Video Receivers

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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.
Thanks,
Dan

Posted on May 19, 2008

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I have samsung wave 3(gt8600) that switch off itself and switch on itself without stopping. It will stop only when i remove the battery. I treid to solve through samsung kies but nothing helps me why bcoz...


Hi there, this is a problem with all the Wave 3's, it's quiet dissapointing as there software cannot cope. The only way I managed to fix mine was by deleting unwanted items so as to reduce the memory and then let the battery run totally flat and recharge it over night. It seems to hold out for a good few weeks after that but unfortunately does start doing it again. Hope that help's a little.

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I got an Onkyo amp- TX-SR674, don't know why i turn on it but after 2 seconds, it will switch off and standby light is flashing, can many times. Please help


If the stand by red light starts blinking after 4 seconds of switching On it indicates an output short circuit. In all probability one of the Amplifiers output stage is defective and to prevent speaker damage the protection circuit is getting activated in 4 seconds. You will need professional help to fix this.

Sep 11, 2011 | Onkyo Audio & Video Receivers

1 Answer

My denon receiver is stuck in stand by mode it goes on fro about 10 seconds and then shuts off the system, what can I do?


hi,
Your system goes to standby mode after power ON means it is in protection mode.
First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the protect show or not . if not, then any of the speaker is damaged. If then also it shows protect you have to check the amplifiers hardware.

AV receivers shows protect mode , when there is a hardware fault in side it. Its a warning that some thing is wrong.
Normally AV receivers show this when any of the output amplifier have some problem. there are six amplifiers in this AV receiver. May occur when the output diver transistors of any of the amplifier become shorted. if the output transistor get shorted this will lead to flow of current through the speakers. To prevent this there is a protection circuit for each channels. One combined output of this protection circuit is connected to the system control. when the any of the output amplifier fails, the protection circuit detects it and switch of the speaker and sent data to the system control. when the system control get this data it will give a warning to the customer through display that PROTECT.
You have to check the amplifier.
For that you need digital multimeter,soledring iron screwdrivers etc
Open the amplifier , then power it on. connect the negative terminal of the multimeter any where in the chase( metal body of the amplifer). then connect the positive terminal to all the output transistors emitter pin one by one . the voltage should be bellow 0.5V. If any of the emitter of the transistor shows voltage more than 0.5V., then that amplifier stage is faulty. Remove the transistors and check it. if it is shot then replace with a new one.
after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial.
You can do this easily remove the mains fuse. put the bulb in a holder. now you have to wire from the holder. connect one of it to the one end of the fuse holder and the other wire to the other end of the fuse holder. Why using a bulb is, if there is any further problem in the amplifier stage on which the transistors replaced, there is a possibility of the new transistor get damage. if we use a bulb in serial with its mains supply ,when any overload in the amplifier occur the bulb will drop the current, by lighting itself.
After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check
connect the power and check.
If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components.
ok

Jun 12, 2011 | Denon AVR-2807 Receiver

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I have a TDK HD-01 head demagnetizer for cassette decks, but I have lost the instructions. Could you help?


Hi there.
First - Turn On The Tape Demagnatiser (should be a switch on it)
Second - Insert into cassette player
Third - Turn On cassette player
Fourth - TURN DOWN VOLUME ON AMPLIFIER TO MINIMUM (This is essential!)
Fifth - Press Play on cassette player
Sixth - After 10 seconds press stop on the cassette player
Seventh - Remove the cassette demagnetizer from the cassette player
Eighth - Turn off the demagnetizer and put back in it's usual storage place

AGAIN, MAKE SURE THE VOLUME IS TURN TO MINIUM WHEN USING THIS AS THE NOISES CAN DAMAGE SPEAKERS.

Jan 07, 2011 | Audio & Video Receivers

1 Answer

My receiver will not change to digital play ? the text on the receiver is ''analog only''


Hi

A little more information about the make and model of your amplifier would make it much easier to tell you exactly what button where to press on your amplifier.

But I am sure I can point you in the right direction.

Analog only means that although you have connected your DVD player or Settop box to your amplifier on the digital coaxial input you have not yet setup all that needs to be setup.

Start by checking that you have enabled the digital coaxial output on you DVD player. You can set the following if it is available:
1: Select your Digital output to ON
2: Dolby Digital setting must be Dolby digital
3: MPEG switched to MPEG, not PCM
4: Select 96Khz/24bit or higher data transfer on coaxial cable.
Note - all these setting might not be available depending on the manufacturer.

Now you will already know the input switching on the amplifier - so select DVD.

Now to activate the coaxial port you must look for a button named "input mode" either on the amplifier itself or on the remote.

Press this until the amplifier says Digital.

Now get ready for great sound.

Hope this helps!

Jan 01, 2010 | Audio & Video Receivers

1 Answer

My Denon AVR 2805,has a problem. In a few seconds after switching on, it automatically turns itself off. What is the cause of this problem? How can I fix it?


This unit is in what is termed :protect mode". This means that one or more of the amplifier channels has a rpoblem that was detected by the protection circuit inside and the unit has been shutdown to prevent further damage. This is often shorted output transistors or a defective amp pac for the surround channels. Expect a parts cost in the $50 range for this repair.

Dan

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You might have your speakers shorted. Check the wiring at the amp and speaker terminals

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1 Answer

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Sounds like a bad output channel is causing it to go into protect mode. Time to see a repair tech.

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