Main line fuse for System 3-7

Every System 3 to 7 game has a 7.5 A fast-blow main fuse at the front of the cabinet, reached through the coin door.

Line voltage is present in the cabinet; unplug the game before working on it.

Systems

• Williams System 3
• Williams System 4
• Williams System 6 / 6A
• Williams System 7

Related tips

• System 4 fuse chart
• System 6 fuse chart
• System 7 fuse chart
• Fuse values to keep on hand for System 3-7
• Add fuses to the inputs of the backbox bridges
• Pull the coil and lamp fuses for the first power-up
• Pull fuses F2 and F3 until the CPU board runs properly
• Solenoid fuse blows as soon as the game is turned on

Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)