Question about Denon D-M50S CD Shelf System

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Denon m50 The cd function on my set stopped working and display said Mechanical Error, any ideas?

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  • Anonymous Dec 15, 2007

    Hi Scobie
    I have experienced the same problem which turned out to be very simple to resolve.

    The player immediately after being turned on and following the usual 'Hello', would display 'mechanical error'. It was accompanied by a whirring noise rather than the usual disc shifting sound and noticeably there was no 'clump' as the selected disc fell to the turntable. It turned out to be the Clamping mechanism located to the rear of the carousel mech. not having moved through it's full drop and so not locating the disc properly. The cause was that the lubrication of the plastic lifting components had dried out and the clamping mechanism was not moving freely enough. I think this results in a 'Race' situation with other moving parts of the carousel causing a jam. By gently relocating the jammed trays and ensuring free movement of the clamping mechanism the problem was resolved. a point to note. The lubrication appears to be a specialist one used particularly for plastics. Other types I have tried will not work well especially when cold.

    Regards Ibbotsnm

  • ACD70 Dec 31, 2007

    Hi there... I'm experiencing the same issue & would appreciate any & all help you can give. My e-mail address is [email protected].



    Thanks in advance....

  • Anonymous May 27, 2008

    i have got two CD's stuck in one tray. What do I do? I have a UD-M50

  • JezBaz Mar 09, 2009

    1.  CD changer jamming.  this is the third time for this unit, twice fixed under warranty, but this time i have to pay.
    2.  Volume control wayward and sometimes willnot reduce.
    3.  Tuner now seems to be messing around.


    Can anyone assist in fixing any of these?


    from teh posts it looks like this unit is just poorly designed.


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Hi Scobie
I have experienced the same problem which turned out to be very simple to resolve.

The player immediately after being turned on and following the usual 'Hello', would display 'mechanical error'. It was accompanied by a whirring noise rather than the usual disc shifting sound and noticeably there was no 'clump' as the selected disc fell to the turntable. It turned out to be the Clamping mechanism located to the rear of the carousel mech. not having moved through it's full drop and so not locating the disc properly. The cause was that the lubrication of the plastic lifting components had dried out and the clamping mechanism was not moving freely enough. I think this results in a 'Race' situation with other moving parts of the carousel causing a jam. By gently relocating the jammed trays and ensuring free movement of the clamping mechanism the problem was resolved. a point to note. The lubrication appears to be a specialist one used particularly for plastics. Other types I have tried will not work well especially when cold.

Regards Ibbotsnm

Posted on Dec 15, 2007

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You can probably fix it yourself but you may need some parts. Here's Denon's link that'll take you to the next step http://www.usa.denon.com/

Posted on Sep 11, 2007

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Ok the manual didn't tell me much I just need to find out how to work the CD player on a sylvania scr4986. Can someone help me. I'd really appreciate it.


Basic CD Operation:
1. Power the unit ON if STANDBY mode by pressing the STANDBY ON/OFF(#3).The default
mode is RADIO,so press the FUNCTION button(#8) to switch to the CD mode.
2. Open the CD door by pressing the OPEN/CLOSE door release button(#9).Inset a CD with the
label facing upwards and close the door.
3. The unit will read the disc and display the total number of tracks found on the disc on the
display
4. To begin playback press the PLAY/PAUSE/BAND button(#1).The first brack on the disc will
play.
5. To pause playback press the PLAY/PAUSE/BAND button(#1) once more.Pressing again resumes playback.
6. Press the STOP button(#2) to stop playback.
7. Use the AL 1/VOL- or AL 2/VOL+ buttons(13,14) to adjust the volume level.
Advanced CD operation
1. Press the FWD/TUN+ button to skip to the next track.Press and hold to fast forward the
current track.Release the button to resume normal playback.
2. Press the REV/TUN- button to skip to the previous track.Press and hold to fast rewind the
current track.Release the button to resume normal playback.
Random playback
1. Press and hold the SLEEP/RDM button(#15) either during playback or in STOP mode for 2
seconds and then release.You will see the letters RDM appear on the display to indicate the
RANDOM mode in active.
2. If you enable the RANDOM function in STOP mode,press the PLAY/PAUSE/BAND button
to begin playback.If you enable the function during playback the next track will begin the
random order
3. To cancel the RANDOM playback mode,press and hold the SLEEP/RDM button(#15) for 2
seconds and release again.The letters RDM will disappear from the display to indicate the
function has been cancelled.
Repeat function
1. Before or during playback press the REPEAT/PROG button(#6) to repeat a single track
indefinitely.You will see REP appear on the display when active.
2. To repeat all tracks on the disc,press the REPEAT/PROG button(#6) twice(or once more if
you have already activated the repeat once function).You will see REP on the display blinking
to indicate the repeat ALL function is active
3. To cancel any repeat modes,press the REPEAT/PROG button(#6) once more(if in repeat all
mode or twice if in repeat once mode).The letters REP will disappear from the display.
CD program playback.
NOTE:You can only program a playback sequence while the disc is in STOP mode.
1. Press and hold the REPEAT/PROG button(#6).You will see P01 appear on the display to
indicate the program function has been initiated.
2. Use the FWD/TUN+&REV/TUN- buttons to select the track you want to play in slot No 1.
3. Press the REPEAT/PROG(#6) to store the selected track in slot 1.The display will now
display P02 to indicate your selecting the track for slot 2.
4. Repeat steps 2 to 3 for every track you wish to program up to a maximum of 20 tracks. If you
try to program more than 20 tracks the display will revert back to P01 and will overwrite the
first slot again.
5. Press the PLAY/PAUSE/BAND button(#1) to begin the programmed sequence playback.
6. Should you wish to cancel the programming you can press the STOP button to resume normal
function.

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ooops...you may need to do a manual extraction on that...there may be a reset manual mode on that one..let me check the user guide..but it may require removing the case, and delicately releasing that mechanism from inside..

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31: DPD offset adjustment error .
Contact any service technician. You can't repair this. The error code list to this set:
The meaning of error code is as below:
01: Communication error (No reply from syscon)
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60: Focus on error
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70: Lead in data read fail
71: TOC read time out (CD)
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81: Unknown media type
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http://electronicshelponline.blogspot.com/

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