Check playfield switches with the switch edges test

Steps

• Start the switch edges test; the left of the display shows the whole matrix plus the flipper and coin door grounded switches.
• Roll a ball over or press one switch at a time.
• The matching dot should become a square and the number should match the switch location chart.

Systems

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

Related tips

• Using the switch edge test
• No playfield switches work: check the regulated 12 V
• Telling a playfield switch short from a CPU board fault
• How the switch matrix reads a switch
• Switch 24, the always-closed switch
• Testing a switch diode out of circuit
• Switch matrix dead after a screwdriver slip under the playfield
• How the Williams switch matrix is scanned

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