A patriot RM4 that doesn't like foreign country ...

[ktno78]

I explain, i've got a rm4 from US
I change it to the 240V and when i turn on, i've got a little buzz and the fuse burn (or blow sorry about my frenchy english)

I change the fuse and all are burned immediatly without buzz

I test all the fuse inside and they are OK

So i've got a 110V transformer and when i put the rm4 back to 120V with a larger fuse (3,15 because i don't yave a 2A yet) and it seem to stay
Everything done without mods inside.

I don't know what to do because it's something that never happens before.

How could i test the power supply ? Is it possible that it doesn't work in 220/240V only ?

does it have a US nostalgy ...

 

[kc2eeb]

You English is fine, don't worry. It's a lot better than my French.
First, when you adjust it to 220/240 volts, the 220/240 should be at the top.
Truthfully, It sounds like one of the windings is shorted in the transformer.
If it works on 110 with the step-down transformer, I would use it like that.
Here's a link to the manual:
http://www2.randallamplifiers.com/images/stories/manuals/rm4.pdf
http://www2.randallamplifiers.com/images/stories/manuals/RM4%20MIDI%20guide.pdf
It should work on the 220 volt setting. Since it blows fuses I wouldn't keep trying since you don't want to do more damage. Is there a technician you can bring it to?
Also, http://www.jadedfaithmods.com/
has parts if you need a new transformer. Contact Rob there.

 

[ktno78]

Thanks for your answer

The mark of the choice of the Voltage is on the right and that were i put it.

The problem of using an adapter for 110V is to add a new buzz source that i worked to eliminate everywhere with the other elements

I try to contact master jedi rob