I have a mystifying Switch problem on a Bally Playboy and I’m probably overlooking something simple.
Problem: Bottom pop, right outline, arrow rollover switches all work for a few seconds occasionally on startup, then die. These all share a common wire, brown/yellow, and pin.
Some tests and fixes I’ve tried:
Replaced MPU with Rottendog board
Confirmed continuity to each Switch from brown/yellow connector pin when plugged in.
Replaced all three Switch diodes.
Clipped off capacitors just to see if they were causing the issue.
Check to make sure no parts were touching these switches.
I don’t see another Switch with this wire but this diagram says “credit button” is on the same column. No idea what that is. There are no credit buttons on Ballys. This brn ylw wire doesn’t go to the coin door.
Am I reading this wrong? I usually only tech later games with actual, documented Switch matrices with wire coloring info and such. This era of game doesn’t seem to have that...