A flipper, pop bumper, eject hole, slingshot or drop target bank stops working, or a fuse blows.

Finding a burned solenoid coil

Cause: A solenoid coil burned out, almost always because it was held on: a stuck or bent activating switch, broken linkage jamming a switch, or a held flipper without EOS protection.

Checks

• Look at each coil wrapper under the playfield; dark brown or black paper indicates overheating.
• Try moving the plunger by hand; if it will not move, the coil has likely burned.
• Inspect the switch that fires it and the attached mechanism for a stuck switch or broken part.

Fix

• Fix the cause, then replace the coil with the correct part number from the manual or schematic (the burned coil may itself be a wrong earlier replacement).

Systems

• Williams System 3
• Williams System 4
• Williams System 6 / 6A
• Williams System 7
• Williams System 9
• Williams System 11
• Williams System 11A
• Williams System 11B
• Williams System 11C
• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95
• Bally MPU AS-2518-17
• Bally MPU AS-2518-35
• Stern MPU-100
• Stern MPU-200
• Bally 6803
• Gottlieb System 1
• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B
• Gottlieb System 3
• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b
• Capcom
• Electro-mechanical

Related tips

• Replacing a solenoid coil
• Checking a coil against its chart resistance
• Fuse blows, pops and slings dead: slingshot switch stuck shut cooked coil and Q11
• Pop bumper or slingshot locked on
• A coil hums continuously
• Top pop bumper dead, new coil blows the 1 A playfield fuse at power-up: bad driver
• Pop bumper or slingshot machine-guns on pre-Back to the Future games

Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)