Firing each coil from the WPC solenoid test

Steps

• Press Begin Test inside the coin door, then choose TESTS and SOLENOID TEST.
• Use the + and - buttons to step from coil to coil; set the test to REPEAT with Begin Test.
• On 1993 and later games hold the coin-door interlock switch in, or the 50 V coil power stays off.
• Press Help, or the Start button, for the coil's wire colors, connector pins, fuse and transistors.

Systems

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

Related tips

• Grounding test for WPC coils 1-8
• WPC solenoid driver groups
• Why WPC coil diodes are on the driver board
• The four groups of WPC coil outputs
• One coil does nothing in the solenoid test
• No coils work at all, fuses are good
• WPC coils need no diode except the flippers
• Two or more coils fire together

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