Bally mid-1970s EM start-up sequence

Steps

• Coin relay pulls in and stays in via its own contact plus a score motor contact.
• Lock relay energizes (GI on) and holds through its own switch and a delay relay switch.
• Reset relay pulls in via a contact on the game over relay.
• Score motor pulses the score reset relays, stepping each reel until it reaches zero.
• Total play meter advances; reset relay and motor reset the ball count and player units.
• Credit unit steps down one; game over latch coil and any 100,000 latch coils energize.
• Outhole relay (single ball) or ball release relay (multiball) serves a ball if the outhole or trough switches are closed.
• Extra presses of the credit button on multi-players add players: play meter up, credit down, coin unit up, no reset.

Coin (or credit button with credits) energizes the coin relay, which stays in via its own contact plus a score motor contact. The coin relay pulls in the lock relay (GI on) and, via a contact on the game over relay, the reset relay. The score motor then pulses the score reset relays until all reels read zero, advances the total play meter, resets the ball count and player steppers, takes a credit, latches the game over relay and any 100,000 latch relays, and serves a ball.

Systems

• Electro-mechanical

Related tips

• 1960s-1970s Gottlieb start sequence (score reel games)
• Williams EM start-up sequence
• 1975-78 Gottlieb multi-player start sequence (Ax/Bx games)
• Using the start sequence to find where a reset stops
• 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

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