Problem with "Audio Mute" - NAC N 272

I've not seen this. Things to exclude:

a) it's not a Naim remote oranother remote telling it to mute. If you cover the 272 with a something dark and dense like a coat, does it still happen.

b) Its not an app controlling the 272? Is another app somehow interfering with the Naim app?

c) Have you been using it on Spotify with a phone which is not under your control and is now elsewhere, in which case it could be something to do with what the remote Spotify user is trying to do (although that normally has the volume going up unexpectedly rather than down.)

best

David

Is it definitely the NAC-N272 muting?  Just to eliminate any other possibilities, could it be the amp cutting out and going into protection?

Thanks a lot for the help.

I will try to move all the remote controls to another room.  The problem also exists without using the app and I never used spotify.

Hi Richard, 

I ask you how to do to understand if the cause is the amplifier.

Many thanks for your help.

Angelo

Might be useful to know the rest of the system - what power amp are you using ?

Does it mute just through the speakers or does it also mute through headphones if you connect a pair to the 272 ?

I'm using a NAP 250 DR.

Also another question, when the 272 mutes itself, if you look at it in the app, does it show it as muted or not? You can check that by selecting the 272 in the app, tapping the now-playing bar at the bottom and then if it's muted there should be a loudspeaker icon with a cross through it. And if you tap that it should unmute. Does it?

best

David

If the NAP250DR gets too hot, then it shuts down until its cooled down. But this takes a few minutes. How quickly can you unmute the 272? And if you play music more quietly, do you still have the mute problem. Does the NAP250DR feel unduly hot if you touch it? Have you got good ventilation around it?

best

David

As David describes above, Naim amps have a thermal trip on them.  If they exceed 70 degrees C then they temporarily shut down to protect themselves.

OK, thanks. It looks like one for your dealer &/or Naim's support or service dept. then.  You could try an email to Naim's Steve Hopkins first, but it sounds like a report from a18 months ago on here where a similar issue (would mute on and off randomly) was found to be down to a faulty logo sensor.

NAC-N272 Mute Issue

OK. I have already delivered the item to my reseller.

Thank you very much.

Palanhifi,

It seems to be a weak point of the 272. I encountered the same problem some weeks ago in my 272 from May 2016, which jumps 'out of the blue' to MUTE+PAUSE. In other words, the sound is muted AND the music is paused. Did a couple of tests:

1. When I copy some songs onto a USB stick and play the songs directly from the USB stick in the front panel, the same happens -->  the problem is not in the NAS or in its connection to the 272

2. When I remove the batteries from the remote control, the same problem happens -->  the reason is not a faulty signal from the Remote Control

3. The problem seems to occur after several hours of playing. When I switch off the 272 (using the switch at the back) and turn on after some minutes, the same problem happens.

 Phil Harris from Naim suggested that the 272 unit has a faulty touch logo and the logo is incorrectly registering a mute touch. And indeed, after I disabled the mute button under Settings, the problem was gone.

My kind dealer offered me a free repair under warranty, but I didn't bother.

I had a similar issue with my 272 a few months back. The fault was resolved following a replacement of the logo by Naim. However, If you can put up with the LCD panel flashing on and off every now and again, it's possible to bypass the muting by disabling the option within the menu. As mentioned elsewhere in the thread, it might help pinpoint the issue.

Regards

JR

I had the same issue with my 172. It was caused by the capacitance switch in the logo. The tolerance for the capacitive plate in the mute switch/logo is incredibly tiny. The expansion of the casework due to heat, (ie leaving the preamp always on as you should) caused a "pinching" which muted the preamp.

My importer, (Chris Murphy), sorted this for me without fuss. It is a known issue,  I understand that it wasn't really Naim's fault, just a few dicky switches.

My mute on the face of the 272 is very hit or miss...I thought it wasn't working at all when I first got it ...it muted about one time in ten "touches"

The more I used it the better it got ...but every now and then it goes really insensitive again and just doesn't operate..

I didn't even know that my 272 has that feature 

Well it can be disabled or enabled in the menu so maybe yours has been turned off ??

I find it a reality useful feature as when I'm playing vinyl, I just tap the logo when the run out groove is playing...turn the record and re-que it ...and tap the logo to un mute as I'm walking away..