Question about Harman Kardon AVR 510 Receiver

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I have a Harmon Kardon receiver that produces a hum from my speakers. I have tried multiple speaker pairs and electrical outlets/surge protectors. How can I stopthe humming?

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Does the hum go away when you change inputs?

Posted on Dec 30, 2010

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1 Answer

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How old is your HK receiver? The power supply capacitors can get old and tired, and cause the hum and shutoff. Repair is an option.

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I had the same issue, definitely check your cable. if that's good try a different outlet. i had mine in the surge protector when it was making the high pitch sound. when i just went straight to the wall outlet by it self it worked great. hope this helps.

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I have an older model Harman Kardon AVR and have started hearing humming from the speakers that are attached to it. Is my receiver going bad or is there something else I need to do to fix this problem?


Hi,
you may have a bad Earth power 110 V AC cable connection which makes such hum / buzz even nothing connected..
Check the connections between components and make sure they are secure before proceeding to the next Step. Sometimes, loose connections can cause a hum.
  • Separate the audio cables from the power cables; electromagnetic interference from the power cables can cause stereo hum. Use cable ties to secure the audio cables away from the power cables.
  • Plug in a surge protector to the outlet, and then plug all the components into that surge protector
  • Connect a ground plug to the surge protector and then plug the ground plug into the main outlet. A ground plug is available at any hardware store, and turns a three prong connection into a two prong. Ground plugs help eliminate 60 cycle hum.
  • 5 Connect the ground wire from your turntable to the ground wire connection on the receiver. If this doesn't work, looking on the back there should be a grounding point,

    Unplug your receiver.. Split a wire and attach one of the splits to the receiver where you will see the text, "ground" or something similar. Attach the other end to something metal such as a pipe that goes into the ground. Secure with electrical tape. Plug in.
    connect the ground wire to a screw on the electrical outlet.

    Read more: How to Fix a Hum on a Stereo Receiver ' eHow.com http://www.ehow.com/how_5183193_fix-hum-stereo-receiver.html#ixzz1PpFHs1Mv


    Take care and please remember to rate "AS THUMBS UP" Thanks
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    If you have the harmon kardon receiver, check out this reasonably priced system. You can actually find it cheaper than at this website but I have these speakers and, when paired with the Klipsch sub-woofer, it makes movie watching an unbelievable experience.

    http://www.klipsch.com/na-en/products/quintet-sl-home-theater-system-overview/

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    Unplug the minijack from computer to hear if it still hums. If not test speakers at another computer. if it works fine on other computer the sounncard is generating hum noise. Common problem is usually the earthing cable inside the minjack that is touching L or R speakerwire due to bending of cable and breaking off insulation. If youre up to it cut off minijack if its moulde and resolder a new one on.

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    Here is the support section for Harmon Kardon

    I don't know if there supported anymore but you might be able to find what youre looking for on EBay. You could try plugging the speakers into a seperate outlet and see if the noise is caused by electrical interferance. Make sure your microphone is muted if your not using it. It might be time for a new pair of speakers too.

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