End-of-stroke switches: pre-Fliptronics versus Fliptronics

Pre-Fliptronics WPC flippers use a high voltage, normally closed EOS switch with tungsten contacts and a 2.2 mfd 250 V arc capacitor (5045-12095-00); opening at full stroke drops out the power winding. Fliptronics flippers use a low voltage, normally open EOS switch with gold contacts and no capacitor; it closes at full stroke and tells the CPU to switch off the power winding. If the EOS never closes, the CPU cuts the power winding after a few milliseconds anyway and reports the switch.

Systems

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

Related tips

• EOS capacitor for parallel wound flipper coils
• Fitting a parallel FL11630 or FL11722 flipper coil
• Measuring a pre-Fliptronics flipper coil and its EOS switch
• Pre-Fliptronics: flippers work even with no game running
• Pre-Fliptronics EOS and cabinet switches: file clean, open about 1/8"
• Flipper buttons not seen by the game (pre-Fliptronics)
• Pre-Fliptronics flipper coil wiring
• Pre-Fliptronics: weak flipper

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