System 3 slam switch is normally open
Unlike System 1 and System 80, the coin door slam switch on System 3 is normally open and must close to end a game.
Systems
Related tips
- Smart Switch pin 1 and pin 2
- What is inside a Smart Switch
- Catching random switch closures
- Proving the driver board's switch strobes
- Gottlieb Smart Switches (piezo)
- Lamp and switch matrix size and drivers
- Never bend a Smart Switch blade
- A failed Smart Switch can be replaced by a plain switch
Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)