Game only makes chime sounds after a battery or RAM change

Some 1982-1985 Bally games store the sound theme in memory rather than on a DIP switch. A new battery or 5101 RAM resets it to the chime setting; reselect the theme as the game manual describes.

Systems

• Bally MPU AS-2518-35

Related tips

• Faulty sound board blanks the displays and confuses the lamps
• Game locks up after the seventh flash
• Repairing battery corrosion on the MPU
• Fitting a remote AA battery pack
• Use a fast enough 5101 RAM
• Game locks up entering bookkeeping after a battery change
• Get the MPU booting before you change any ROM jumpers
• Cut the original MPU battery off right away

Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)