Williams Black Knight 2000 (Williams, 1989) right flipper problem

[skip34]

I have a BK2K that has been working fairly well untill yesterday. While playing the game, the right flippers (lower and upper) stopped working. I found a blown fuse- F5- on the aux power driver board.

I eplaced the fuse twice and even though the flippers begin working, the fuse will blow and flippers fail during the first ball.

Is there a typical issue that will cause this problem?

Thanks,
Skip

 

[spalmer]

Check the Diodes on the flipper coils. If one is bad, it could cause this. Bad EOS switch (end of stroke switch, cuts high voltage to the flipper when it is held) that is not opening could cause this or even a bad coil.