Where the sound board and GI fuses are by generation

World Cup through Stellar Wars mount the sound board in the lower cabinet (with the volume control reachable from the coin door). From System 6 it is in the backbox above the power supply. World Cup to Algar have GI fuses on a fuse card off the power supply board (one on early games, three on System 6), while System 7 moves the GI fuses onto the power supply board.

Systems

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

Related tips

• Where the flipper fuse is by generation
• Where the fuses are

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