Power supply board fuses (typical game)
All System 11 fuses are slow-blow; values vary by game. Power supply board: F1 score display supply (1/10 A or 1/4 A on earlier games, 3/8 A later); F2 1/8 A display supply, or 2.5 A for +34 V solenoids on earlier games; F3 1/8 A display supply, or 8 A for the +18 V lamp matrix on earlier games; F4 7 A for -12 V; F5 7 A for +5 V and +12 V. Games before Banzai Run also have GI fuses on blocks in the backbox.
Systems
Related tips
- Blown high-voltage display fuse in the backbox
- Half the backbox lamps and the lower displays dead: check the backbox fuses
- What the System 11 power supply board feeds
- Rebuilding the +100 V section of the power supply
- Rebuilding the -100 V section of the power supply
- GI connectors left the power supply after Cyclone
- +5 V fuse blows the instant the game is switched on
- System 11 power supply versions D-8345 and D-12246
Source: Repairing Williams System 11 Pinball 1986 to 1990, Deel 1, Clay Harrell (pinrepair.com)