Doodle Bug
Williams, 1971You're currently viewing posts by Pinsider MarkG.
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There's not much to the Ball Count Step Up solenoid circuit:
Doodle Bug Ball Count (resized).jpg
Have you had a good look at the Score Motor Impuse switch? The Ball Count should step up in evenly spaced steps over time since the impulse switch is involved (which rides over 5 evenly spaced teeth on the cam). If it sounds like there's a variable amount of time between the balls it does add your impulse switch is probably dirty or barely making contact.
/Mark
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St. Louis, MO