Question about NAD C521 CD Player

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Nad c520 high pitched ringing

I have a Nad C520 cd Player which works fine but emits a high pitched ringing noise which I located to a component on the circuit board the sound is not throught the speakers it is comming directly from the circuit board I was wondering if anyone has come across this problem before and is it fixable Thanks

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  • megacon Sep 18, 2008

    That was exactly the problem. I was able to set it to a balance of ringing/brightness and am happy with the results. I really thought I was going to have to spend money getting this fixed so I really appreciate your help !!!! Thanks !!!

  • Anonymous Mar 20, 2009

    I had the same problem with my NAD C525BEE CD player! Thanks very much as I just adjusted the trim pot (was black on mine not yellow, but the only one on the circuit board and near the front) to make my display dimmer and now I no longer hear the annoying high frequency pitch from the player. Thank-you thank-you thank-you!

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Hi, From your description, it sounds as if the noise is coming from the circuit that controls the display backlight. If I recall correctly, the C520 has an EL backlight just like the C521 (which I have one of). On the front of the circuit board, there should be a little yellow trimmer potentiometer that controls the brightness of the display. It may be that the noise will go away if the brightness is turned down some. If  the noise varies as you turn the controller, but doesn't go away completely, the backlight may need servicing.

Posted on Sep 17, 2008

  • dtaylor91 Sep 18, 2008

    Glad it worked out for you!

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