System 80 CPU board revisions D102, D107 and D20869

DET PB03-D102-001 holds the game code in two 512-byte 7641 PROMs at PROM1 and PROM2 and was used on the first five System 80 games. DET PB03-D107-001 takes one 2716 at PROM1 with PROM2 empty; a D102 reworked to D107 shows four jumper wires on the solder side. D107-003 only moves a ground trace for a mounting screw. D20869 came with 80A and was used on 80B too: U2/U3 socketed, PROM2 socket gone, and on 80B some display chips replaced by jumpers.

Systems

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

Games

• Circus
• Counterforce
• The Amazing Spider-Man

Related tips

• Later single-PROM CPU board won't boot in an early System 80 game
• Which System 80 CPU board goes with which games
• System 80 CPU board main chips
• System 80 and 80A CPU boards swap only with the matching U2/U3
• Reading the System 80 CPU DIP switches
• U2/U3 rules ROMs decide which system a CPU board runs
• Converting a D102 CPU board to take a 2716 game ROM
• Swapping CPU boards between System 80, 80A and 80B

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