Supplies made on the WPC power driver board

The driver board makes +5 V DC (logic), +12 V DC (switch matrix, motors and relays), +18 V DC (lamp matrix), +20 V DC (flashers), +50 V DC (coils) and 6.3 V AC (GI). Only the +5 V and the switch-matrix +12 V are regulated; the others are rectified and filtered only.

Systems

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

Related tips

• Voltages made by the WPC power driver board
• WPC power driver bridge rectifiers and +5 V regulator
• Driver board LED4 off and the game won't boot (WPC-S and earlier)
• WPC-89/WPC-S driver board LEDs and test points
• WPC-95 driver board LEDs and test points
• Bridge rectifiers to use on WPC-S and earlier driver boards
• Bridge positions on WPC-S and earlier driver boards
• Adding backup jumpers to a WPC or WPC-S driver board

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part One, Clay Harrell (pinrepair.com)