Nad 502 CD will not recognise and play CD every time

I have a similar problem to bert. I put a CD in my Nad 502 and it will not recognise the disc. The display shows "No Disk". When this happens it sounds like the disc isnt spinning or being read.

If I keep opening and closing the cd trayer it will read and play the CD sometimes but increasingly it will not read. On some occassions it will say "Error" (instead of no disc) and then I have to press the play button several times before it eventually plays. Curiously, it will play burned copies of the same CD's no problem and sounds fine.

Bert suggested that It was the CD lifting mechnism not lifting the disk high enough or something similar but he/she doesnt seem to have any replies. I havent taken the unit apart yet so im not sure whether this is the same problem. Im wondering whether theres a quick fix to this or whether I need to send it somewhere for repair.

Thank you for reading, please help.

When the CD player does play, it sound perfect and does not therefore appear to be any problem with the laser.

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6,784 Answers

HI.This will occur when the optical assembly becomes unstable. this ((Whole One Piece)), assembly incorporates the spin/load motor, optics housing /arm, tracking device and tracking rail. This is connected to the loading dock assembly. This 'NO Disc' or CD NOT PLAYABLE, code is the result of a failed or burned out lens, or misaligned loading mechanism. It is possible that you have a dirty lens cap. you can try using a cleaning disk in this case to confirm actual lens failure. if the cleaning doesn't restore normal reading capabilities, this will confirm my diagnosis.

You will need to have the optical assembly replaced in this case. once replaced, your unit will be able to read and track once more

Posted on Sep 14, 2009

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