From Andre Majorel Sent Wed, Apr 11th 2018, 12:56
From Andre Majorel Sent Wed, Apr 11th 2018, 12:56
On 2018-04-11 02:47 +0000, Robert G Willis wrote: > I have been unable to find a schematic for this, and I need to > wire the transformer for 230/240v (see photo). > https://drive.google.com/file/d/1ZBsipuBHBkuXStNbaeZwBctTyZM9xF7V/view?usp=sharing > > I have opened up my roland m-vs1 (which is similar internally > to other sound expansions from Roland). > > Originally when I was in USA it was wired for 110/117V as follows: > T301 yellow > T303 brown > T304 white > > Now I am in Autralia I am wondering if this is correct for 230/240v: > T302 Brown > T303 Yellow > T304 White > > I have done many transformer rewirings in the past with the > assistance of a schematic, but without one this time, I > thought it best to check. I know nothing about this particular device but the resistance of a primary winding designed for 230 V should be about twice that of one designed for 115 V. By the way, why do you have three wires ? I would expect two wires for the primary. If there are three wires, it must be a centre-tap primary and there would be a voltage selector next to the inlet. Unless one of the wires is the earth ? -- André Majorel http://www.teaser.fr/~amajorel/