Checking a fuse properly

Steps

• Turn the machine off.
• Take the fuse out of its holder.
• Check it for continuity with a meter; a blown fuse, especially a slow-blow, often looks intact.

Switch the game off before pulling fuses or touching the transformer area.

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

• Testing a fuse properly
• Test a fuse properly with a meter
• Testing a fuse
• Fuses to keep for EM games
• Where the fuses are
• Test every fuse properly before first power-on
• Fuse rating rules
• Fuse letter codes

Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer