Maybe. There's a spot on the rim of the 10k stepper gear at about 8 o'clock. Could that be a pin that has sheared off?
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I think you are correct Sir. It is completely smooth, so I didn't even notice it. It will line up at 6 o'clock when the
stepper wheel resets to Zero at about 3 o'clock. See my attachment.
I made the attachment before I saw the rest of you post.......
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At reset the 10k/10M stepper gear rotates counter clockwise until the (missing) pin is at the 6 o'clock position. In that position the pin *closes* the two switches in the switch stack which starts the score motor. The score motor eventually causes the 10k/10M stepper to advance one step, which moves the (missing) pin to the left and allows the two switches top *open*. The 10k/10M stepper is then ready for a new game.
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Yes that would make sense. I can't read the schematic, so I can't tell what is happening in the Motor circuit.
How did you get a clear view of those switches?????
IMG_2897 (resized).JPG