Where flipper power comes from
Flippers share the solenoid bridge rectifier and have no filter capacitor. On System 3 and 4 the 28 V goes straight to the flippers with a fuse under the playfield. From Flash (System 6) on, flipper power passes through the power supply board and is fused by F4. Late System 7 games (Firepower II and later) have a separate 50 V power supply board just for the flippers; their other coils stay at 28 V.
Systems
Related tips
- Flippers dead: fuse and coil voltage
- How flipper power is routed by generation
- Power circuits in a System 3-7 game
- First power-up check on a dead game
- What the power supply board takes in and puts out
- Replace the 3J6 logic power connector
- Test the power supply with its outputs unplugged
- Pull F2 and F3 when first powering an unknown game
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Three, Clay Harrell (pinrepair.com)