After adjusting a sticking flipper, the solenoid fuse blows as soon as a flipper button is pressed in a game.

Solenoid fuse blows when a flipper is used: worn spacer in the EOS switch stack

Cause: The insulating spacer between the blades of the double end-of-stroke switch had worn out, letting the two switches touch, so the flipper coil was held at full power.

Checks

• Check the fuse is the value in the manual (an oversized fuse had been fitted here).
• Inspect the EOS switch stack, especially the spacers between the blades.
• Check the coil diode and that the plunger moves freely.

Fix

• Replace the worn spacer (or the switch stack) and readjust the EOS switch; resolder any loose coil wires.

Systems

• Bally MPU AS-2518-35

Games

• Lost World

Related tips

• Flippers dead though fuses and EOS switches are good
• GI dims whenever the left flipper button is held: upper left flipper EOS not opening
• Flipper won't kick but holds if lifted by hand: dirty or worn EOS switch
• Flipper sometimes ignores the first button press: replace the EOS switch
• Two upper flippers die after cleaning EOS switches: readjust the break-make pairs
• What the flipper end-of-stroke switch does
• One flipper dead with fuses good
• Flipper stays up after the button is released

Source: Pinball Repair help group!! (Facebook group)