Pressing the credit button starts a game, but the ball count steps up to 10 and the game keeps resetting over and over. Pushing the reset bar on the relay bank by hand stops it and the game then plays.
Ball count runs to 10 and the game resets endlessly: dirty ball count stepper
Cause: The ball count stepper unit and its switches were dirty and some switch gaps were marginal, so the reset sequence never saw the unit reach its home position.
Checks
- Watch the ball count unit during reset and check its zero (home) switch opens when it reaches home.
- Check the 3/5-ball selector plug and the coin door switches too.
Fix
- Take the stepper apart, clean it, and re-gap its switches so they open and close cleanly.
- If it still misbehaves, check the stepper's alignment and reset spring tension.
EM games have line-voltage circuits: unplug the game before working on the steppers.
Systems
Games
Related tips
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- Players, credits or ball count not resetting points to a stepper unit
Source: Pinball Repair help group!! (Facebook group)