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.

Posted by Brett Richardson on

  • enaplito Nov 06, 2007

    I have exactly the same problem. I just recently upgraded my receiver from a HK AVR 30 to HK AVR 635, using the same speakers (Polk RM5000 II & Polk M3 Series) The subwoofer was changed from a passive to a powered one (Polk PSW10) conected to the LFE port.

    Some times the receiver stay on for a full length move, some times after 30 seconds goes into stand by.

    The speakers are 10 years old. Can this be a problem? The speakers wires?

  • soommen May 30, 2008

    when i turn on the volume too amp goes to protect and turns off...i checked all the speaker wires and the system is only three years old...



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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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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?

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Quote from LOGITECH official site:
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).  
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