The slam switch must rest closed with good tension

Each game has a single slam (anti-cheat) switch on the front door, and it is normally closed. Give its blades enough tension that ordinary cabinet vibration never lets it open.

Systems

• Gottlieb System 80
• Gottlieb System 80A

Related tips

• The slam input has priority over every other switch
• Switch test (step 18) shows switches closed
• All tilt switches show as switch 26
• How the switch matrix is scanned
• System 80 switch matrix diodes
• Testing the switch matrix inputs with the test EPROM
• Permanently close the slam circuit on the CPU board
• Coin chute and game start faults are switch faults

Source: System 80 Service Manual, Gottlieb