No Schematics available for this device so I made some up including a PCB mask in case anyone needs to make the control board PCB
Image of assembled circuit board:
Power resistance:
Transformer:
Most of time the relay for the wire feeder breaks (5A type):
It's on this place:
You can replace it with following relay (8A type):
"Printrelais 24V DC | 2 Wechsler | RT424024 Steckrelais | 24 VDC | 24V"
It can be found at a German store (SCHRACK).