The upkicker ejects the ball normally but then keeps firing, sometimes once or twice, sometimes until the game is switched off. A power cycle clears it for a while.
Upkicker keeps firing after the ball has gone: switch gapped too close
Cause: The kicker's switch contacts were set too close together. The kick vibrates the switch blades enough to close them again, which tells the game the ball is still there, so it fires again.
Checks
- With no ball in the kicker, check the switch is open and look at how small the contact gap is.
- Tap the switch area lightly with the game in switch test (if the displays work) to see if it chatters.
Fix
- Re-gap the kicker switch so it opens cleanly with a wider gap and does not re-close from vibration.
Coil voltage is present under the playfield with the game on; take care when testing with the playfield raised.
Systems
Games
Related tips
- Haunted House up-kicker too weak to reach the main playfield
- Power off for switch adjustment, and leave gold contacts alone
Source: Pinball Repair help group!! (Facebook group)