Mount the flipper coil with its lugs away from the coil stop
The coil stop takes the plunger's impact and is where vibration starts, so mount the flipper coil with its wire lugs at the end furthest from the coil stop (nearest the pawl). Many pre-Fliptronics WPC games left the factory with the coils upside down, which lets vibration break the coil wires off the lugs.
Systems
Related tips
- Every WPC flipper coil carries two diodes on its lugs
- Flipper rebuild step 1: remove and check the coil stop
- Flipper coils have two windings
- How a two-winding flipper coil works
- Testing the diodes on a flipper coil
- How the two windings of a flipper coil work
- Checking a flipper coil's resistance
- Fliptronic flipper coil wire colours
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)