Question about Harman Kardon AVR 300 Receiver

5 Answers

When I turn the amp on the view screen flashes protection

I purchased the amp from a second hand shop down town and when I brought it home I plugged it in , turned it on and received the protection instruction. I immediately turned the unit off and began to research the problem. I currently do not have any speakers hooked to the am. Would that cause me to receive that error do to an imbalance?

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  • jcannon1969 Dec 20, 2008

    I attempted to try the amp again after cleaning the amps speaker terminals and cleaning the entire unit. I researched the problem throughout the night and found no solutions that work. Please help.

    John Cannon


  • jcannon1969 Dec 20, 2008

    The amp is a Harmon Kardon AVR300

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5 Answers

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  • Master
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The Speaker not hooking up could be the problem John but it could also be that one of the channel(out put) is shot, but let us not jump to conclusion hook the speaker to it then try again.good luck buddy

Posted on Dec 20, 2008

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John I would take it back, unless it's a fuse it is extremlly to difficult to troubleshoot that kind of problem over the net. you need the schematic, which may be nside on the panel, but then you need a voltmeter and the like, just not worth it. Take it back before they tell you that it's not their problem, which they will do if you wait. Here in Florida they have to giv you a refund if it's within 3 days,, check yout local laws.

Posted on Dec 20, 2008

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  • Harman Kardon Master
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Protection is caused by a short ,m a bad voltage, or a component that has blown.

Unplug power cable, if you still get protection, then the unit is faulty, get your money back.

Posted on Dec 20, 2008

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  • Master
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Hi and welcome to FixYa,

Offhand, most current designs of receivers/amplifiers have built-in diagnostics that triggers the protection mode to kick in if the diagnostics senses a fault. One of these faults is a short in the speaker/speaker wire. The opposite also holds true, it would trigger protect is there are no speakers connected. An amp would self destruct either way, shorted speakers or open speakers (or as in your case, none connected)

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 20, 2008

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What is the model of your AMP??

Posted on Dec 20, 2008

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