PSU Failure

The XPS2 has a bit of a reputation for blowing fuses. Check the fuse in the mains plug. If it's OK then check the fuses in the XPS2 fuse carrier at the rear near the mains inlet. There's a "live fuse"and a spare.

Here's a link from the FAQ's section with more detail.

https://forums.naimaudio.com/topic/equipment-fuses

Lastly contact your dealer or Naim support.

Thank you for this

I can see the fuse cover but not sure how to get it off! Do I lever it with a screwdriver or should I be able to remove it with my fingers?

Thanks again

Bill

You should be able to extract/lever it out with a thin screwdriver.

It pulls out - you may be able to do this with your finger nails or else carefully prising out with a small screwdriver.  Only do this with the IEC lead disconnected.  You may well have a spare fuse in the holder part of the cover.

Brilliant - thank you

Fuse is completely black inside so I guess this is the culprit...!

Yup, that sounds like the problem.  You should get some spares - make sure they're the exact same make and type as original.  Ask your Naim dealer to help you out.

Yes thank you just in the process of ordering some as there was no spare in the holder.

Cheers for the advice - when it wouldn't turn on I did think it might end up being expensive so a happy ending!

Bill

This is a great post (for me). My xps stopped working yesterday, I was ready to look for the local dealer but thats sorted. Could there be any sinister reason why the fuse needed replacement?

Thanks!

Small blips on the mains can lead to untoward transients. A while ago my 300's protection system was damaged and the fuse in at least 1 S'Cap failed when we suffered what seemed to be a minor power outage. I had an interesting conversation with the local supplier over the transient that had been injected into the system on power restoration. 

My XPS-DR, a few months ago, suddenly started blowing fuses. I mean that after it blew the first one, and I found no spare in the proper space, I bought a whole pack of the correct ones (5x20, 250V, 2.5A) and it blew six or seven in a row, once blowing the mains off too.

It took me some time to discover that the culprit was one single socket - and only that one - in my 3-post power strip, an anonymous one with Schuko sockets bought on eBay.

I have bought a better power strip (nothing fancy, just a plain, serious one from a manufacturer of electrical stuff, with real wall sockets), and my XPS has ceased blowing fuses.

That's good to know Massimo, I have a powerigel, bought many years ago. I will disconnect everything and check all the connections to be safe.

sheffieldgraham posted:

The XPS2 has a bit of a reputation for blowing fuses.

This.

My XPS2 got through about two or three a year, in a bad year. I kept a bag of spares.

XPS is know to be a fuse blower, in current inrush must be close to the slow blow max value of the fuse.  I hate turning mine off as there's a 50/50 chance it'll go "pop" when I turn it on again...

Important - the fuses must be of the 'delayed' type. But it's true that the XPS is a thirsty beast. I too turn on mine with some trepidation each time... Part of the fun.

A tip that reduces the chance of a blown fuse (and I'm sure many of you know it already)...

Turn on the power switch on sharply, rather than trying to turn it on smoothly.  This reduces the risk of a temporary state where there's an intermittent current when the switch is closed but with an incomplete contact.