Cross-posting this here to catch the eye of one of you System 1 geniuses...this one's a doozy:
When I got my JP machine for restoration, it had a strange characteristic: Somebody had placed a large relay box between the incoming power wires and the target bank coil, most likely to substitute for the stand-up transistor, which was taken out of the circuit. The game started up and played fine. (I'm using an X-1 all in one board instead of the Gottlieb boards.)
I wanted to replace the transistor and get that relay out of there before starting the restoration, but when I put the transistor in and wired it up (using Clay's photos for reference as well as other peoples'), the game still turned on okay and all displays worked, but I was unable to start a game. I would think that the two things are COMPLETELY unrelated, but that's the timeline on what happened.
Now my restoration is done, and everything lights up and displays fine, but I'm still unable to start a game.
Any ideas on what the hell would cause this? I do have schematics if anybody needs a photo of a certain section or wants me to refer to them. Or if you can tell me how to test the transistor (I think I'd have to desolder it first, though, no?).
Thanks for any help you can give...hopefully the photos are large enough that you can see what's going where. It doesn't look like that anymore so I can't help with that...
PS - One picture shows the transistor after I replaced it and removed the relay!
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