(Topic ID: 330200)

Bonus Stepper Unit not resetting on 1955 Williams Three Deuces

By Flipsteen

1 year ago



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  • 5 posts
  • 2 Pinsiders participating
  • Latest reply 1 year ago by Flipsteen
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Bonus Unit schematic (resized).jpg

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#1 1 year ago

Working my way through game issues on a 1955 Williams Three Deuces restoration, the Bonus Stepper Unit is not resetting at Startup. Looking at the bottom of the attached schematic, the Bonus Relay fires the Bonus Escape Coil on the Bonus Stepper and resets it. But the Bonus Relay is not firing at startup. If I manually actuate the Bonus Relay it completes the circuit to the Bouus Escape coil and resets the Bonus Stepper. Thank you for any ideas.

Bonus Unit schematic (resized).jpgBonus Unit schematic (resized).jpg
#3 1 year ago
Quoted from pinballdaveh:

Check the bonus unit open at zero position blade switch. This switch is in series with the bonus relay coil. Check for a strong connection when bonus unit advances from zero position. Clean and adjust switch if needed.

I checked that switch and making good connection and when it's closed if I actuate bonus relay by hand, bonus unit resets.

#5 1 year ago

Yeah wasn't sure how the Bonus stepper worked. So when and how does the bonus stepper reset? I'm not past issues where I can play a game.

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