If those solenoids are sticking: clean them with lighter fluid.
Blown fuses are a sign of an overload or (temporairy short) somewhere in the circuit.
Sparks over the contacts is a sign of trouble, I would have to see that myself.

Is there a Sinar Service point in the UK ?
Otherwise you could contact the Dutch Sinar rep.
They speak english and hekp you further.

I am still in Brazil, back in Holland early September for at least 3 month.

Peter