Background sound stuck on after a slam tilt

On games with the sound and speech board (Mars God of War and later), a slam tilt can leave the background sound running. Setting CPU DIP switch 25 to on prevents it.

Systems

• Gottlieb System 80

Games

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

Related tips

• Haunted House: no sound 16 in the sound test
• Niwumpf replacement CPU board takes about 10 seconds to show scores
• Black Hole DIP switch traps
• Haunted House switch matrix wiring
• Haunted House and Black Hole sound board DIP switches
• Sound supply fuse F8 blows after the game runs a while
• Sound aux supply keeps blowing its 2N6059: shorted capacitor on the 30 V rail
• Sometimes boots with a long tone and no sound: failed 6532 RIOT on the sound board

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