Ground mod for high-voltage cap C26
High-voltage cap C26 takes its ground via J3 pin 3; if that pin burns, the ground is lost. Solder a short jumper on the solder side between the C26 negative lead and the ground next to it, which also ties it to Q23's ground.
The score display supply runs at 170-230 V DC; keep hands off the rectifier and driver boards with power on.
Systems
Related tips
- Rebuilding the solenoid driver board high-voltage section
- High-voltage section parts on the solenoid driver board
- Display voltage too high: driver TP2 equals TP4
- Capacitor C26 holds the display high voltage after power-off
- Replace filter cap C23 on every game
- Replacing filter cap C23
- Solenoid driver/regulator board test point voltages
- Solenoid driver/voltage regulator board test points
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)