I THINK THAT IT NEEDS THIS PART WHICH IS ACTUALLY THE CONTROL INTERFACE. THE DETAILS I HAVE ON IT ARE;
 91201461.A
MDI A011.1/1
46/00
SWITCH ASSYUSER INTERFAC
HOPE THIS MAKES MORE SENSE 
THIS IS FROM LOOKING INSIDE THE MACHINE AND TAKING THE NUMBERS OFF THE PARTS THEMSELF.
                
 STEPHEN
                
 August 2005