Which System 80 power supply boards are interchangeable

System 80 and 80A power supplies swap freely. The 80B supply is a different, 5 V-only design that won't fit earlier games; it matches the later System 3 supply except that 80B uses .156" connectors. Replacement 80/80A supplies are sold with the ground fix already built in.

Systems

• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B

Related tips

• Ground mod for the System 80B power supply
• While the 80B power supply is out
• Reassemble and set up the 80/80A power supply
• Bench-test an 80/80A power supply in the game, part 1
• Bench-test an 80/80A power supply in the game, part 2
• Parts for the 80/80A power supply rebuild
• Mandatory 80/80A power supply rebuild
• Recommended extras for the 80/80A power supply

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