Adding an inline fuse to a non-CPU kicker coil

Steps

• Turn the game off.
• Find the coil's power lead: the wire on the lug where the diode band sits. The green wires are ground.
• Unsolder that wire from the coil.
• Solder one lead of an inline fuse holder to the empty coil lug.
• Solder the other fuse holder lead to the wire (or wires) you took off, and insulate the joint.
• Fit a 3 A slow-blow fuse.

Systems

• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B

Related tips

• Haunted House has six switch-fired kickers that need fuses
• Find out first whether a coil is CPU-controlled
• None of the CPU-controlled coils fire
• Some CPU-controlled coils are dead or locked on
• Coil sleeves by mechanism
• Check every coil's resistance before first power-up
• Which coil lug the power wire goes on
• CPU chips to check for solenoid faults

Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part Two, Clay Harrell (pinrepair.com)