Question about Harman Kardon AVR 635 Receiver

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Reciever goes into stanby mode after 30 seconds of being turned on

Every time I turn on my receiver it works for about 30 seconds and then it cuts out and goes into standby mode. This problem just recently started and happens everytime I turn the power on. I tried a system reset but this did not fix the problem. I'm guess it is some kind of fuse problem but I am not sure.

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Re: reciever goes into stanby mode after 30 seconds of...

I had a similar issue as yours on my HK AVR635 and I had the speaker board replaced (internal part where the speaker wires plug into...part/labor under$150CDN). Not sure the exact name of it but when that was replaced all was well.

Posted on Dec 01, 2009

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Re: reciever goes into stanby mode after 30 seconds of...

No. If your using all the speakers that came with the unit, and unit was working correctly before then, your problem is an indication of a more serious problem about to occur. Your unit is detecting an over current situation. It could be something like a idle bias problem, or alighnment, or theres a part thats going bad and not up to specs. Oh Yes and one of your speakers could have a problem and just hasent went bad all the way yet. If it was my reciver , I would have it bench checked with some resistive loads and see on the scope, where the units clipping, if it is. If not the tech will know if its a zero crossover, idle bias or an offset thats bad. Without the proper equipment this is not a repair for you to attempt , unless of course you happen to be an electronic tech? Good Luck

Posted on Jul 03, 2006

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My denon avr1200 receiver once it is turned on goes into Protection mode. How do you reset or make work?

The reciever will go into protection mode when there is a short in the speaker wires or the amplifier was overloaded. What I would do first is verify that none of the speaker wire connections are loose at the back of the reciever or at each speaker. And verify that none of the wires are making contact with each other. Then label each speaker wire as you remove them from the reciever so you can re-install them correctly. After you have disconnected the speaker wires try unplugging the reciever for 10 to 15 minutes. Most recievers have a self-resetting overload protection switch and this should reset it back to normal. Now try plugging the reciever back in and turn it on without the speaker wires connected. It should be out of protection mode now. If it is still in protection mode verify that there is not a reset switch somewhere on the back of the reciever. If it is not in protection mode now then proceed to connect one speaker set at a time and turn on the reciever to see if it goes into protection mode. If it goes into that mode after connecting a speaker then that speaker is the cause of the problem. If it does not go into the mode after all speakers are connected then try turning the volume up. If it goes into protection mode then there could be an internal short on the amplifier or a incorrect OHM rated speakers connected to reciever. Verify that the speakers are rated the correct OHMS.

Feb 22, 2010 | Denon AVR-1200 Receiver

2 Answers

Getting out of protect mode I have a Denon 787 receiver. It was working fine for 8 months. All of sudden, my reciever goes into protect mode after playing for about 30 min. Right after it goes into protect...

most of the receivers come with a cooling fan inside see if its working they usually work when you turn the volume up,, if its working that means you are playing it to loud if you lower the volume a little it will play just fine..( if the fan inside is not working thats the reason it goes into protect mode and it means you must have it repaired,, it goes into protect mode to prevent furter damage to the unit or the speakers,,

Dec 18, 2009 | Denon AVR-787

1 Answer

Enters standby after being on for only a few seconds.

Sounds like either the volume is turned up too loud, or you have a short. Have you tried disconnecting all the speaker leads from the rear, and then powering it on? Usually if it turns on for a short time and then shuts off, it is throwing itself into protection mode.

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Sony DE-445 reciever flashes PROTECT

Sounds like a grounding problem. If the ground plug isn't missing or loose try plugging it into a different outlet.

Jun 13, 2009 | Sony STR-DE445 Receiver

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I have a denon 1909 reciever.

The unit is going into protection mode. This means that a problem was detected and the unit shuts down to prevent further damage. Examine the speaker wires to be sure that they are not crossed. If they seem OK, remove them and attempt to turn on the unit. If the unit behaves the same, then the problem is internal to the receiver. The most common cause of this is shorted output transistors. These are relatively inexpensive. Expect a parts cost in the $30 range. Add in the local labor rate for the entire repair cost. Dan

Jun 06, 2009 | Denon Audio & Video Receivers

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Sound goes off in a few seconds

p mean protection mode, something is not right to send the reciever into protect mode, check wiring

May 05, 2009 | Audio & Video Receivers

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I have a wireless headphones the only number i can see is model f0461b on the trasmitter. The transmitter and headphone are not comunicating the lights are red not blue.How do i recalibrate them so they...

In rare cases, the FreePulse Headphones may loose synchronization with the receiver. If this occurs the following steps will re-establish the connection by putting both the headphones and the receiver in discoverable mode (actively searching for another bluetooth device it can connect to).
Putting the headphones in discoverable mode:
Press and hold the power button (located next to the charging port on the right earpiece) on the headphones. The LED on the button will go through three states in this order:
  • Blinking Red
  • Off (continue to hold. the LED will be off for several seconds)
  • Alternately blinking red and blue. (The headphones are now in discoverable mode and you can release the button at this point. The headphones will remain in this state for 30 seconds).
Putting the receiver in discoverable mode:
Press and hold the power button (located on the side of the receiver opposite the headphone jack).The LED on the button will go through three states in this order:
  • Blinking Red
  • Off (continue to hold. the LED will be off for several seconds)
  • Alternately blinking red and blue. (The reciever is now in discoverable mode and you can release the button at this point. The reciever will remain in this state for 30 seconds).
Re-establishing the connection:
To re-establish the connection between the headphones and the reciever, put the headphones and the receiver in discoverable mode at the same time. It will take a few seconds for the two devices to establish the connection. Once the connection has been established the LEDs on both the headphones and receiver will glow solid blue.

Nov 19, 2008 | Audio & Video Receivers

4 Answers

Amp comes on and goes right into protection mode

Turn the reciever on for a second or two and then off before the protect mode shows up on the monitor. Repeat this step about five times and check to see if the reciever does not go into protect mode. If it does go into protect mode try it again. Dont know if this is the proper way to fix the reciever but it worked for me. Good Luck

Mar 09, 2008 | Audio & Video Receivers

3 Answers

Shows to be stuck in Standby.

hold down the enter button and the advanced surround button for 5 seconds or so and the amp will restart, the display will come up and hopefully it will be ok. its often caused by using speakers under 8 ohms, or damaged speaker cables etc

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