hi there
my tr707 needs a new power adapter as the middle pin has dropped out
but previous owner has cunning soldered wires for a power adapter straight onto the board
the only thing is I dont know which is negative or positive so not sure which one to connect
to what.
I have uploaded a photo or you can look at image here
http://farm4.static.flickr.com/3422/3180802879_5f31b2dfce_b.jpg
any advise is greatly appreciated