Coils do not fire.
No solenoid voltage
Cause: Blown F2, a bad connector, a failed 6BR2 bridge or loose wires on it.
Checks
- Black lead on J3 pin 3 (ground), red on J3 pins 6 to 9: expect 28 to 38 VDC.
- Check F2 and the wires on 6BR2.
Fix
- Replace the fuse, connector or bridge as found.
Systems
Related tips
- No coils fire: check the 28 V solenoid supply
- Weak coils from a browned 3J3 connector
- Flippers dead: fuse and coil voltage
- Replacing a solenoid coil
- Parts of the 28 V solenoid supply
- Fire a coil or flashlamp by grounding it
- Fitting the high-voltage kit
- Lower the display voltage to 91 V to extend display life
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)