System 3-6 drop targets use two switches per target
Each target has a momentary scoring contact that closes as it drops and a down contact that stays closed while it is down. The down contacts of a bank are daisy-chained in series, so the circuit only completes, and the bank resets, when every target is down. Because of this they cannot be swapped for later single-switch banks, which arrived with System 7 and Black Knight.
Systems
Related tips
- Cleaning and rebuilding System 3-6 drop targets
- Stand-in for a broken drop target wiper
- Drop targets do not fall
- Drop targets stop scoring or the bank will not reset
- Drop target does not fall when hit
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Three, Clay Harrell (pinrepair.com)