Under-playfield pop bumper driver boards protect the coils
Pop bumpers are not fired by the CPU: each one has its own small driver board under the playfield that turns the cup switch closure into a timed pulse, so a switch that sticks closed cannot hold the coil on.
Systems
Related tips
- How the pop bumper driver board fires its coil
- How the System 80 pop bumper driver board works
- Bench check of a pop bumper driver board
- Common failures on the pop bumper driver board
- Mandatory pop bumper driver board update
- Using a pop bumper driver board as a timer for motors and toys
- A pop bumper never fires
- Original pop bumper driver board values (A-19741)
Source: System 80 Service Manual, Gottlieb