Yeah had the same issue diagrams don't really help. I used the downloaded manual.

I disconnected the magnet board. then repaired the ripper solenoid my one was blowing a fuse. Replaced the fuse tested ripper all good. You could have a shorted coil or transistor. Just get that working with the magnet board unplugged.

Plugged in the magnet board blew fuse when the ripper was activated. Magnet board got new transistors and ic (whatever it was) I also had cut tracks I repaired all good now!!!!

You may want to check the resistance on those magnet coils check there's no shorts may undo all your hard work. All 3 should measure about the same.

Those schematics don't link the ripper and the magnet board but they use the same line.