Backbox chase lights run from their own board

The running lights around the backbox on Black Hole, Haunted House, Volcano and Mars God of War come from a separate auxiliary lamp driver board, not the CPU, and should start as soon as the game is switched on. The boards differ only in R13, which sets how long each lamp stays lit: 270k on Black Hole, 1.1M on Haunted House, 560k on Volcano and 330k on Mars God of War.

Systems

• Gottlieb System 80

Games

• Black Hole
• Haunted House
• Mars God of War
• Volcano

Related tips

• Displays flicker on games with an auxiliary lamp board
• Displays flicker in time with the backglass light show
• Haunted House driver board: which transistor runs which coil
• Black Hole driver board: which transistor runs which coil
• One or more controlled lamps never light or stay on
• Black Hole: run the backglass motor only during a game (transistor method)

Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part Two, Clay Harrell (pinrepair.com)