Trouble Shoot Ball Trough Optos on Williams Star Trek Pinball
I had a problem with extra balls coming out during game play on my Williams Star Trek The Next Generation. This video shows how I determined it was my Emitter board that had a problem. I traced my issue to the ball trough by using the switch test built-in to the game. Then I needed to figure out if it was the Emitter board or Receiver board that might be the issue.
Lucky for me it was the Emitter board, this is a lot easier to troubleshoot.