A special solenoid pulls in and stays in once a game begins.
Sling or bumper locks on when a game starts
Cause: Its fire switch is stuck closed.
Checks
- Look at the switch to see why it is closed.
- Unplug 1J18 from the CPU/driver board; if the coil still stays on, the board is faulty.
Fix
- Free the switch and reset the contact gap.
Systems
Related tips
- How System 11 special solenoids work
- A-bank coil not working
- Slingshot or pop bumper will not fire (System 11)
- C-bank coil or flasher not working
- System 11 coil outputs
- How the System 11 A/C bank select works
- 50 V coil dead on an early System 11 game
- Which output drives the bank select relay
Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer