Question about Harman Kardon AVR 7000

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Scratchy noise from all surround mode except 3 channel

I have had this unit for quiet a while now. Before everything was working fine, but now the unit is not working properly. Here is the problem, when I play a movie or any cd selecting other surround mode, I'd get the scratchy noises and the unit will turn itself of. Only the 3 channel mode is working and I can only output the the two front speakers. I tried calling H/K tech for support but the unit warranty had expired a long time ago. Could it be the IC101 on the DSP board that were on the service bulletin board from H/K regarding the Logic 7 scratchy noise? Please help, I did not want to buy another receiver at this moment>

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  • chris ZAMBROTTA
    chris ZAMBROTTA May 11, 2010

    how many capicitors did you change where did you get the replacements?can you give me a diagram or schematic?
    how much did it cost you?i brought a 7000 on ebay 4 350.00 i still can send it back,but if the repair is not too costly ill keep it.thank you
    chriszambrotta@yahoo.com
    i have multi meter how can i test the caps?

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WHERE CAN I GET THE UPDATED OR CHANGES NEEDED IN MY SYSTEM? ITS FROM JANUYARY SO PROBABLY I NEED THAT PROCESSEOR CHANGE DO YOU THINK IT GOING TO BE COSTLY ,CAN YOU GIVE ME AN IDEA?

Posted on Jan 29, 2008

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I believe that these receivers needs approx. 100 Electrolytic capacitors that will fix all these kinds of problems. Mine had to go in the shop recently, the tech working on it is normally quite thourough, however he troubleshot to some ribbon flat cables that were defective and their slotted push in connectors going from the DSP board to the front processor. HK once pointed that a bunch of electrolytic capacitors have dried up, hence would need to be replaced. I would have done the work myself, however the unit had an extended warranty, in this case I will get an exchanged unit, perhaps a unit of my choice, but I still want a Harman Kardon. The DSP processor is not always found to be faulty, however there is a change in the processor being used depending on your particular receiver's serial number.
good luck.

Posted on Jan 17, 2008

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