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Denon UD M31 CD not playing

Denon CD Receiver 31 Can't get the CD to play - it loads up and spins but that's it. It just happened no reason as to why. Any suggestions would be great. I've heard there is a way of resetting the memory on these units - is that true? Would love to get it up and running again.

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It is possible that the laser has gone, the part you require is:

Sanyo SF-P101N CD Mechanism - 16 pins (there are 15 pin versions available which have the same product number, the two versions are incompatible)

i have found the part on Ebay (UK) for less than £5, the shop that sells it also suggest replacing the flexible strip that connects that mechanism to the circuit board, the strip costs £2 and replacing it would seem to be a very sensible idea seeing as you have to completely strip the unit to replace the mechanism.

My UD-M31 is in bits on my work bench at present, awaiting the arrival of a new mechanism, i'll post again if replacing it solves the problem.

Posted on Jan 26, 2009

  • Darkshelves Jan 28, 2009

    the new laser arrived today, i changed it along with the flexible strip and hey presto, it works.

    the job took about an hour in total and the only tools you'll require
    are a soldering iron (there is an anti-static lump of solder on the
    mechanism that you need to remove before you install it) and a
    posi-drive screw driver.

    Drop me a mail to and i'll have a bash at
    explaining how to get the unit apart and, more importantly, back
    together again

  • t72bm Jan 19, 2011

    Have the same problem and fix in the same way, the first SNYO sf-101IN does not work, have to change again with another set, this time it works and things seem fin, only have to bear in mind not to play CD-R disc, this format can bring this machine dead again in a relatively short time!!



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