Williams EM start-up sequence

Start steps the credit unit down (via its own zero switch, a contact on the 2nd coin relay, and the zero switch of the ball count unit); the end-of-stroke switch on the credit decrement coil fires the coin relay. The coin relay trips the game over relay and energizes the reset relay, and the score motor runs. Through the motor the reset relay resets the ball count unit, latches the 2nd coin and game over relays, and pulses the score reset relays until every reel is at zero. It then steps the bonus unit to its zero switch; once the bonus relay releases, the outhole relay runs the motor, steps the bonus unit once and kicks the ball out.

Systems

• Electro-mechanical

Related tips

• Bally mid-1970s EM start-up sequence
• 1975-78 Gottlieb multi-player start sequence (Ax/Bx games)
• 1960s-1970s Gottlieb start sequence (score reel games)
• Start sequence of 1972-78 Gottlieb single players without a reset bank
• Start sequence of 1950s Gottlieb single players with light-box scoring
• Gottlieb start halts after reels reset: S Armature switch
• Outline of a Gottlieb reset-bank game start
• Game never resets: bent coin door switch

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