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(Topic ID: 268303)

Stern Monopoly coil problems - self inficted?

By the96stang

6 months ago

Topic Stats

  • 3 posts
  • 2 Pinsiders participating
  • Latest reply 6 months ago by PinballGiant
  • No one calls this topic a favorite


Linked Games

#1 6 months ago

I have a monopoly with a weird set of coil problems.

I was testing coils to make sure they were working (my up kicker from the out hole was not. ) I grounded the tab of Q 3 to the panel of the back of the game. As soon as I did that the lower left pop bumper coil started locking on and staying locked on. Definitely an "I made the problem worse" moment. I thought I blew the transistor, but it tests fine.

Now when I try and start a game even with that coil disconnected no other coils fire. The fuses test as good. No shorted transistors. Any other thoughts?

#2 6 months ago

Not the pre driver or coil diodes either

#3 6 months ago

Maybe the problem is further upstream like with the IC chip for those transistors

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