Hi all…
On my teed off…..
F23 fuse (.5amp slow blow) blows when ball passes over the roll over switch adjacent to the ball gate/post.
The coil (& assembly) for the gate/post is new and tests within parameters
I’ve checked corresponding resistors/diodes on the driver board. All good. I’ve even swapped in a driver board from another game that’s 100%. So I don’t think it could be board issues.
When I got the game the complete ball gate/post assembly was missing. I assume because it was blowing the fuse and the game can’t be played if the post never drops….I installed a completely new unit that i got from Steve.
Not sure where else to go on it. In reviewing the schematic I can’t find anything else that gives me a clue. Appreciate your suggestions!
Note: the complete assembly I got from Steve at PBR did not have a diode on the coil - assuming that’s acceptable

Thx
Pete

Q6 is the transistor associated with the fuse/coil in question.

Looking under the PF, about 1/2 the coils do and 1/2 don’t have diodes. The slingshots, and upkickers for example do not have diodes….

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On the playboard diagram - a diode is shown. Is this the same diode referenced on the driver board schematic? Or should there in fact be one on the coil?

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