After rebuilding all four flippers, two of them don't work at all.
Flippers dead after a rebuild: EOS switch not closed at rest
Cause: The new end-of-stroke switches were gapped so they were not closed while the flipper was at rest. On these Gottlieb flippers the EOS must be closed in the resting position.
Checks
- With the flipper at rest, check that its EOS switch contacts are touching.
- Check the coil lugs for a wire broken off during the rebuild, and check the coil diodes.
Fix
- Adjust the EOS switch so it is closed when the flipper is at rest and opens at the end of the stroke.
Systems
Games
Related tips
- Flipper rebuild parts (current style)
- Flippers dead during play: check the "U" relay
- Flipper dead: burned coil
- All five flippers dead after a playfield swap: cold joint on the tilt relay
- Which flipper assembly carries which coil
- Flipper coils: standard, intermediate and super
Source: Pinball Repair help group!! (Facebook group)