This problem was fairly easy to diagnose.
Here's a ball's eye view of the alleged 'P' target. Rudy's watching you through
the habitrail... There's still enough switch metal left that a good hit to the
switch will register. Seems like it should be replaced anyway.
Here's the broken switch unbolted from the playfield, but still wired in, with the
new switch tied onto the side of it. The one in back/top is the new switch. I
figured this way I'd be able to move the wires over without messing anything up.
Seemed like a good idea...
The wiring changeover went well, and though it was a snug fit, the new target and
switch went back through the playfield cutout and was screwed into place. A quick
test shows it works as well as the old one did, but at least looks better.
A little time spent with a diode-checking voltmeter leads me to the culprit: one of the switches on that row is miswired, with the white wire going to the wrong side of the switch diode. Which switch? Why, the 'P' target, of course! Since I happened to have photos, I can tell it wasn't my fault! I just moved the wires over exactly like they were before. However, they were wrong before I got there. Move the wire over to the proper side of the switch and diode, and no more false Rudy hits. Slamtilt still doesn't work, but that's a job for later.
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