Doepfer

> IT is probobly the 5volt converter needed for the 190-1 

To elaborate a bit, the 5V converter looks like this: http://www.doepfer.de/a100z_e.htm#AD5

You simply need to plug it into any free socket on the bus board, and it'll output +5V on the appropriate part of the bus.

All the best,
Zoë.