What the flipper end-of-stroke switch does
A flipper coil has a strong low-resistance pull winding and a weak high-resistance hold winding. The EOS switch is closed at rest, shorting out the hold winding, and opens at the end of the stroke to put the hold winding in circuit (page 74). A broken EOS gives a weak flipper; one that never opens burns the coil or blows a fuse.
Systems
Related tips
- Setting the end-of-stroke switch gap
- Set flipper rest angle and end play
- Flippers dead though fuses and EOS switches are good
- Weak, chattering or buzzing flipper: end-of-stroke switch
- One flipper dead with fuses good
- Solenoid fuse blows when a flipper is used: worn spacer in the EOS switch stack
- Cleaning and adjusting the cabinet flipper switch
- Right flipper still dead after fitting a new coil: bad EOS switch
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)