Replace a failed 6116 RAM with a 6264

CPU boards up to Cue Ball Wizard carry a 24-pin 6116 RAM at U3. If it needs replacing, socket the board for a 28-pin 6264 and set the RAM jumpers to suit.

Systems

• Gottlieb System 3

Related tips

• Battery voltage at the RAM but memory still lost
• PIA LED lights, goes out, then lights again
• CPU still will not boot after the basics
• No sound, only amplifier hiss with the volume up
• Logic chips worth stocking
• Game stuck showing the last four high scores
• Game resets every two seconds
• U15 CPU and U25 RAM substitutes

Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)