Korg KR-55 Transformer

[Pavan]

My Korg KR-55 has always relied on an external AC/AC-transformer, but I want to connect the internal original KA-101 transformer.
The original is still in there but no wires are, or has ever been, connected.
Does anyone here has any info on how to connect it? On what I assume is the primary side there are four wires, a yellow, an orange, a brown and o black one.

Thank you!

(My apologies for writing in english)

 

[Eluis]

Hi,
my Kr55 works with 220V !
For better contrast there´s a piece of paper underneath.
Use it on your own risk.
Regards Eluis

 

[Pavan]

Thank you very much!

I actually had already solved it when I saw your picture. But it confirms that I did correct when using only the black and orange coloured transformer wires!