Hey Guys,
I am new here 
.
I have a Problem with my HP-7. I measure 230V till the transformer, but on the other side, nothing comes out. i´f got 5 cables, 2 red, 1 yellow, 1 blue, and 1 black. Could someone help me? Which color has which voltage? Maybe some could measure at his Roland HP-7 .
I couldn`t find a spare part transformer yet or a circuit diagram.
Cheers Ben
