What is on the WPC CPU board

The WPC CPU board carries a 68B09E processor, the game ROM, a 2064 CMOS RAM and the ASIC custom chip. Every switch-matrix and direct (coin door) switch wires to this board, and it commands every other backbox board.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• What fails on a WPC CPU board
• Running a WPC CPU board on the bench
• WPC CPU board versions and where they fit
• Bench-check the WPC CPU switch matrix circuit
• WPC-S and WPC-95 CPU boards need the matching security PIC
• Pre-WPC-S CPU EPROM size jumpers W1 and W2
• Country DIP switch settings on WPC-S and WPC-95 CPU boards
• Country jumpers W13 to W18 on pre-WPC-S CPU boards

Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer