Score motor switch numbering (Gottlieb and Bally)

On Gottlieb score motors a number (usually 1 to 4) names the switch bracket and a letter names the cam level, "A" nearest the bottom board up to "E" nearest the playfield; so switch 4C is on bracket 4, middle level. One stack can hold five or six switches, so match the wire colours on the schematic to find the exact one. Bally also labels level "A" nearest the board.

Systems

• Electro-mechanical

Related tips

• Finding a Gottlieb score motor switch from its schematic name
• Check the score motor switches before power-up
• What the score motor does
• Why the score motor home switch arcs on opening only
• Getting at score motor switches, and slowing a sequence down
• Gottlieb score motor overshoots: brake switch
• Leave score motor switches alone unless clearly faulty
• Score motor keeps running at game over, O relay stays in: score motor 2C switch

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