How an EM pop bumper works

The ball presses the skirt, whose stem pushes on the cupped (spoon) leaf switch underneath. That switch pulls in the pop bumper relay, which fires the bumper coil and the 1, 10 or 100 point relay (with its bell).

Systems

• Electro-mechanical

Related tips

• Rebuilding an EM pop bumper
• Pop bumper armature links: which to use and how they go together
• Making pop bumpers kick harder
• Cleaning and adjusting the pop bumper spoon switch
• Strengthening pop bumpers by removing coil windings
• Renew sleeves on flipper, pop bumper and sling coils
• Game resets but no playfield solenoid works
• Gottlieb pop bumper relay and score reel stuck on

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)