What stepper units do in an EM

Step-up/reset units (two coils, one resets to home) usually count players, balls and coins. Step-up/step-down units (two coils) mostly count bonus. Continuous units (one coil, must go all the way round) change features and run the match. 1950s lightbox-scoring games use one stepper per scoring range, with the lowest range usually a continuous unit.

Systems

• Electro-mechanical

Related tips

• Kinds of stepper unit
• Faults that point to a stepper unit
• Cleaning and aligning an EM stepper unit
• Bally 00-90 match unit
• Bally coin unit
• Gottlieb player unit
• Players, credits or ball count not resetting points to a stepper unit
• Stepper cleaning, part 4: refit and test

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part One, Clay Harrell (pinrepair.com)