System 7 fuse chart

Power supply: F1 display 90 VAC 1/4 A slow; F2 solenoids 28 VDC 2.5 A slow; F3 lamp matrix 18 VDC 8 A fast; F4 flippers 28 VDC 10 A fast with two flippers or 15 A fast with three or four (not used on Firepower II, Laser Cue, Star Light); F5 and F6 9.3 VAC for +5 V, 7 A slow; F7 GI 6.3 VAC 20 A fast. Sound board F1 and F2 9.3 VAC 4 A slow. Flipper supply (last three games): F2 48 VAC 5 A slow.

Systems

• Williams System 7

Games

• Firepower II
• Laser Cue
• Star Light

Related tips

• Where the flipper fuse is by generation
• Fuse values to keep on hand for System 3-7
• Main line fuse for System 3-7
• Games built on System 7
• Testing a fuse
• Add fuses to the inputs of the backbox bridges
• Sound ROM numbers shared by System 7 games
• Pull the coil and lamp fuses for the first power-up

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