How WPC games drive AC and DC motors

AC motors are usually switched by a small relay board in the playfield whose relay coil runs from one of the power driver coil outputs. DC motors can be run straight from a coil driver output. Check the game manual for the circuit your game uses, then test the driver like any coil.

Systems

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

Related tips

• Which transistor drives which WPC solenoid and lamp circuits
• What a WPC game reset is
• Grounding test for WPC coils 1-8
• WPC-95 LED101 off (+5 V, game will not boot)
• Testing a WPC-95 rectifier diode
• Raising the WPC-95 +5 V to about 5.2 V
• How the WPC lamp matrix works
• Which WPC backbox boards move between games

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