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Denon UD-M30 - repair or replace?

Discussion in 'audio' started by advb69, Jan 12, 2013.

  1. Clive D

    Clive D Low fidelity victim

    For the OP, be aware that Denon will be introducing the DM40 shortly, the DM39 - which is a great machine and problem free in my kitchen - might be available at a lowered price.
  2. rtrt

    rtrt pfm Member

    Hi Supertech hope you don't mind me asking your advice on my old cd player. Its a Pioneer pd8500 and I'm keen to get using it again.

    I've recently fixed one major problem, but am left with a more subtle one. The positive is that I've fixed the skipping forward that happened on track 1 of every disc - turns out that the laser sled was binding on a piece of plastic that had come unglued in the mech.

    However having fixed that, i have the more subtle issue where on the first play of a disc, about 10-20 seconds in to the first song, there's a sub 1 second no sound period. i don't hear the laser skip and looking at the time on the display there's no skip fwd or back. If I then go back to the start of the song the no sound problem doesn't repeat - suggesting that it's nothing to do with the laser position, except maybe on the first time through only?

    I have the maintenance manual, where the exploded diagram helped with the mechanical issue above. I've tried putting the player into test mode and run it through the steps in the manual, but I suspect without the test disc and tools - Oscilloscope etc I'm probably not going to achieve much there.

    If you have any suggestions for a next step that'd be much appreciated.

    Apologies to the OP for the hijack, but it is old...:D
  3. mickyricky

    mickyricky pfm Member

    I have a Denon m30 which has started playing up, it goes max volume on switch on and you have to rush to it to turn it down....
    Any help on fixing the problem will be appreciated..
  4. Almca

    Almca New Member

    Am trying to access the lense on my UD M30. Istari_knight left this helpful note but the attached picture is no longer available. Could you repost the picture or could someone point the way to simply accessing the lense for cleaning?
    Can it be cleaned without dismantling teh casing?
  5. peter bj

    peter bj pfm Member

    Perhaps buying the same used would be cheaper and save a lot of faffing about usually plenty about
  6. Almca

    Almca New Member

    It's a thought although checking on line a lot of machines seem to have faults.
  7. Minstrel SE

    Minstrel SE These go to eleven

    These mini boxes are rarely worth repairing.

    Theres usually some built in obsolesence and they just dont seem to last long.

    Denon are a good brand but mini units are built to a price including a large chunk of vat. The cd mechanism is cheap and not reliable over long periods. Too much going on in a small box.

    Ive seen units from Teac and Sharp which are ready for the skip after less than a couple of years. Its simply not cost effective to repair them even if the parts are available.

    Without the right diagnostic tools most of us wont achieve much. I think weve got to realise that mini systems are a budget option with a short lifespan. Nobody is really going to pay a service engineer or spend too much effort on them.
  8. Ragaman

    Ragaman Mentalist

    I agree, having owned both this really does outshine the 31 on every level, you will not want to have the 31 repaired or replaced i feel if you purchased this.

    Even the earlier dm38 sounds far superior to the 31 & can be purchased for very little these days.
  9. cj66

    cj66 pfm Member

    I have a Teac PD-H300 with similar problems. I have cleaned the laser which made a minor improvement but was wandering if a similar reset code existed for this model?

    (I have downloaded a version of the service manual in which there are no service codes)

  10. DrewR

    DrewR New Member

    I have, sadly, come to this quite late and I hope the original participants are still about.

    I bought the whole system, which included the Mission speakers and the tape player/recorder, for my daughter when she became a student. I got feedback that it was not as happy as it should have been but no detail.

    It was handed back a few months ago with the declaration that it is c**p and had been since it was only a few months old. Seems it is the same old problems: CDs would not play properly, the volume would be all over the place and the manual might as well be in Sanskrit.

    I am resolved to try to fix it but have fallen at the first fence; i.e. getting the case off. It seems to be connected to the fascia at the top but I cannot see how to get it free. Clearly everyone here has managed it so I am feeling that I must be being a bit dim. Any suggestions or hints would be much appreciated.
  11. DM30

    DM30 New Member

    I have tried the calibration procedure but can't seem to get it to work so I must be doing something wrong.

    How long do i need to hold the power and function buttons? What exactly does press play 3 times at 3 second intervals mean? Do I press play a total of 9 times, or 3 times with three seconds between presses? Thanks!

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