Janome XC33?

Lights up, digital display OK. Stitch Selection shown accompanied by sound beep. However, wont start. No voltage supply to 24v main motor. Runs when voltage introduced to motor red/black wires on motor plug on main circuit board. Suspect board - which component? Power transistor and diodes OK. 36v on Transistor. Foot switch which closes circuit is attached to white CB Socket. No connection to black footswitch socket - presumably not used. Would appreciate Circuit/manual. Willing to purchase. Power Board OK and transformer. Any suggestions?

Norman
October 2008