Mod your Beresford 7520

[Gazjam]

Stan himself recommended running the maplin psu at 13.5v for the 7510 prior to mk6/3 (before the virtualDC circuit came in to play) so I think the Dacs can take 13.5v without a problem.
Can any techies out there confim this just to be sure?

Try it ken. Been running 13.5 for a couple of days now and the Dacs not got any hotter, so assuming it's ok?

[sponge]

Try it ken. Been running 13.5 for a couple of days now and the Dacs not got any hotter, so assuming it's ok?

Will do - Thanks Gaz - Probably get tomorrow before I can report back.
I asked about the actual voltage as those SMPS's are rarely accurate but if anything they are likely to be on the high side, so I guess I'll be safe enough.

Ken

[trailer]

Right, strange goings on at trailer towers.

Came home just now to find that the Maplin PSU isn't psu'ing anymore. Fuse is OK. No volts output/led.

Any suggestions? (I've got the box but not the receipt, its about 4 or 5 months old)

[leo]

There maybe some internal fuse or circuit protection in the the actual unit if your getting no led or output

Things like the fets can go in SMPS's , in most things I'd say take a few internal pics but tbh SMPS's can be lethal so don't be tempted to go poking around in one of these! theres a lot more in these things than a linear.

Is it usually sat on carpet or in a closed space? I presume you tried it without plugged into the dac too to see if it lights up?

[trailer]

Leo,

It doesn't work plugged in or not. The DAC works OK with the standard wall wart.

There's a couple of strange screws on the top of the unit which seem to be the only means of access. If it was just a case of changing an internal fuse then I'd give it a go!

The PSU was sat on the carpet on it's edge. I've never found it to be running that warm as it had plenty of space around it.

[leo]

Well circuit protectors or fuses normally go for a reason, if one of the internal fets is blown the protection will kick in to prevent it going bang

If it was running ok earlier and you've not touched/moved it and it suddenly goes off its likely one or more internal components could have failed

Do you know any local friends with the same supply who may have kept their receipt

[leo]

Sorry to not be much help but I tend to be very cautious with SMPS's, nasty bloody things tbh when they go wrong

[trailer]

Leo,

No worries, like you said with something like that then it's better safe than sorry.

I got the PSU when it was on offer before the StanDAC rush. I did ring Maplins and explained the situation. They said if I paid by card (which I did) and they could trace the date (which I probably can) they could find it on their system so I might be OK. Would a fail like this be covered under the guarantee? I've only ever ran it on the DAC.

[sponge]

Right, strange goings on at trailer towers.

Came home just now to find that the Maplin PSU isn't psu'ing anymore. Fuse is OK. No volts output/led.

Any suggestions? (I've got the box but not the receipt, its about 4 or 5 months old)

It's a bit spooky - Just as we are talking about PSU's ...

Are you in the habit of tuning the unit off when not in use - In my experience switchers don't like being power cycled too often - Best to just leave them powered up and just turn off the equipment they are powering.

Good luck with Maplins...

Ken

[trailer]

Cheers.

I leave my kit on all the time as it happens. It makes everything sound better doesn't it?