Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems 561 blowing fuses

Hello,

This is happening to a new-to-Meridian owner, during initial setup/system connection.

561 connected to DSP5000s with comms and digital, 220V environment.
After 15 minutes of normality, fuse in 561 blows. Replaced with a new (same size) fuse, same thing after 15 minutes.

Some additional details:

561 is US version, but used with a proper 220 to 120 transformer. The fuses blown were the original T250mA/250V from US, since the 561 is powered with the same 120V.
DSP5000 is EU version.

Any ideas?
Thanks.

Or is there another way to replace the existing internal US market transformer with a EU market one and then not using anything outboard?

You may be able to convert the transformer to 240v from 120v by changing the wiring of the primaries; 240 will be in series, 120 will be in parallel.

I did this on a 506 bought in Canada to use in the UK.

The fuse blowing may be caused by something else though!

All the best,

Steve.

I’ve been told this on another forum:

Can you plug it into a 120v socket (I’m assuming you’re in Canada where 120v is the norm)?
You can see if it is working and not blowing the fuse, which would rule out a problem in the 561.

Changing the primary wiring on the transformer is very simple, a local technician should be able to do it cheaply if you’re not happy with DIY.

All the best,

Steve

Not now, since it’s in Europe.
I plugged it in when it was in Canada just to confirm that it powers up and the buttons.
I don’t think it was for more than 15 minutes.
But anyway another power converter will be tried out soon. With new fuses of course.

Ah, well an autotransformer 240 to 120 would be a good start, but the transformer primary mod is the best solution.

I used an autotransformer with my 506 at first, then I just rewired the transformer; I’m pretty sure Meridian used the same transformer for both 240 and 120 markets, just wiring up the primaries differently.

A lot of dual voltage equipment had a switch on the back that just changed the primaries between parallel and series, this was before switch mode supplies were the norm, that can take a wide range of input voltages.

The 561 has been working for more than two hours after getting a more robust power converter.
Hopefully this is sorted out now.
Thanks for the responses.

That’s good news!