A few days ago, while i was testing a MPU board. The Q4 of the PPB burned out. I have replaced that and i've noticed that the plungercoil was melted.
I have replaced the coil and when i started the pinball machine, i heard some kind of high tension noise. Well, that was the coil burning again. Weird thing is, the fuse does not blow. Why is this happening? is there a problem with voltages? bad PPB or bad Powersupply board?
If i disconnect the wires of the plungercoil, should i measure some voltages?
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