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
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.
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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 !!!
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!
sorry, I upped this post after a long time, loved the answer but not enough results
please: what does dtaylor mean by "servicing the display"?
thank you in advance!
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