When BR1 fails, replace C10 too
The +5 V bridge BR1 and its 18,000 mfd 20 V filter capacitor C10 work as a pair. If BR1 failed, assume C10 is bad or close to it. Filter capacitors last about ten years, so C10 is due on every System 11 game anyway.
Systems
Related tips
- Game boots only sometimes, 5 V drops out: cracked diode D6 on the power supply
- System 11 backbox boards and supplies
- What the System 11 power supply board feeds
- System 11 power supply versions D-8345 and D-12246
- +5 V fuse blows the instant the game is switched on
- Low +12 V (below 10.5 V)
- Routine high-voltage changes on every System 11 power supply
- Display voltages at 3J5, power supply D-8345 (High Speed to Swords of Fury)
Source: Repairing Williams System 11 Pinball 1986 to 1990, Part Two, Clay Harrell (pinrepair.com)