Hello folks ,this is my first post so maybe this have been discussed before but however i never found more info , i don't need the midistudio 644 service manual ,all i want is the properties of the PSU ..it's an input with 4 pins (?) ( : : ) i need just to figure out what voltage it supplies which pin since i got my Taskam without PSU , i work with electronics so i think maybe i can put together a + - 10V PSU ,but i also heard there is + 7 there ,so i am really not sure about the pins and want to clear that out ,any help is appreciated .Thanks 
Vladosh

Vladosh