Champ Pinball Machine Schematic

returnZero

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Does anyone have a pdf of the schematics to a 1974 Bally Champ Pinball Machine? I need to track down some issues. I am have two major issues here. One, triggering the credit microswitch never engages the coin relay. I have to start the game by engaging the coin relay manually. Secondly, the ball index unit never works, so, the game stay on first person first ball indefinitely.

Any thoughts?
 
I have two of those, I had a similar problem with one and it turned out to be a dirty contact in one of the leaf packs on the score motor.
 
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