Score reel EOS switch: what happens when it fails
The reel coil's normally closed EOS switch opens at full stroke to cut the score relay. If it stays closed, the relay, reel coil and any chime can lock on, especially on Bally and Williams. If it breaks open (common), the pulse is just a little shorter, so fast target hits might not score; leave it until the game works. The exception is a three-blade or normally open EOS, which handles a carry and must work. 10,000 reels usually have no EOS.
Systems
Related tips
- Clean and adjust score reel nine and zero switches
- Score reels by maker
- How score reels come out, by maker
- Check a score reel mechanism
- How the score motor resets the reels
- Williams reset problems: cracked joints on score reel switches
- Clean the score reel relays
- Check the score motor switches before power-up
Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part One, Clay Harrell (pinrepair.com)