Bottom board fuses and what each feeds
On the original System 80 power distribution drawing: F7 1/4 A slow-blow on the 60 V AC for the display supply; F5 5 A slow-blow on the 12 V AC that feeds the +12 V logic bridge; F4 1/4 A slow-blow on the 12 V AC to the sound board; F6 on the 25 V AC to the +24 V coil bridge; F3 on the 8 V AC to the +6 V controlled lamp bridge; and F1 and F2 on the 6.3 V AC general illumination. F1, F2, F3 and F6 ratings depend on the game, so take them from the game manual.
Line voltage is present at the bottom board, line filter and primary fuse whenever the game is plugged in.
Systems
Related tips
- Check the bottom board and playfield fuses early
- Bottom board plugs A7-J1 to J8
- The +12 V filter capacitor on the bottom board
- Bottom-panel bridge rectifiers and fuses
- First power-up, step 1: check the bottom-panel fuses
- Under-playfield fuses on System 80 games
- Test fuses out of the holder and never over-fuse
- Haunted House playfield fuses
Source: System 80 Service Manual, Gottlieb