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Denon UD-M31. Circuit protect mode permanantly engaged.

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Sounds like the output section is fried. See a repair guy.

Posted on Jun 03, 2008

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1 Answer

How do I connect my tv to my UD-M31 - Denon CD Receiver


The receiver must have an optical "IN" port to be able to connect the TV to it.

Dec 07, 2016 | Denon Audio Players & Recorders

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Denon ud m31


Get the manual and read it.

Aug 05, 2013 | Audio Players & Recorders

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Denon AVR589 shuts off. I removed all connections and plugged it back into the wall and powered it on. The same thing happened. I think the company told me it was going into protect mode. I have no idea...


One or more channels have a short in the audio output stage causing the protect mode to engage " saving it from further damage " this will require a professional or Denon service. I'am not aware if there are issues with this model.

May 07, 2011 | Denon AVR-3805 Receiver

1 Answer

DENON UD-M30 CD Player is displaying the word PROTECT and will not function. Any ideas how to fix this problem? Many thanks.


HI:
Usually when a receiver goes into protect mode, there are several reasons, One is there is a bad speaker connected to the unit, this will cause the unit to to into protect mode, try disconnecting all speaker from the unit and turning it on if it does not go into protect then one of the speakers are bad. Another reason is the power output Amplifier IC is shorted inside the unit. Another reasons could be that speaker wires are touching each other and causing a short. Disconnect all unit connecting to the unit and try turning on, if it stays on and no protect then connect them including the speakers one at time until you determine which is causing the error. If it goes into protect with nothing but the unit on then the Output IC is bad and the unit needs servicing.

Mar 10, 2011 | Denon CDR-M30 CD Recorder

1 Answer

Protect!!!


Hi,

Have you unplugged it from wall since ?
and, do you know if maybe the speakers are blown?
Bad speakers will make it stay in "protect"
Try other speakers after the unplug-plug back in routine.
Try the Denon website for a manual

Jan 11, 2009 | Denon D-M50S CD Shelf System

3 Answers

Setting the clock on a Denon UD-M30 CD-R


1. press the menu/set button on component to select display mode
2. use the +/- button to set the time mode (AM 12:00 blinks)
3. press the menu/set button for at least 2 seconds (the hour will start blinking)
4. Use the +/- button to set the hour, must roll the hour to change am/pm
5. press the menu/set button to switch to minutes
6. use the +/- button to set minutes
7. press the menu/set button to finish setting the time

Dec 15, 2008 | Denon CDR-M30 CD Recorder

1 Answer

Denon UD M31 CD not playing


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.


Jan 01, 2008 | Audio Players & Recorders

1 Answer

Subwoofer


what do i need to connect a subwoofer to my Denon UD-M31

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