Line filter, power switch and service outlet
After the varistor the line goes through a small silver line filter box and then the on/off switch; both can occasionally fail, the filter by shorting. The cabinet service outlet ahead of the switch is live even with the game off.
Line voltage (120 V AC) is present on the rectifier board and its J2 connector; unplug the game before touching it.
Systems
Related tips
- No voltage at any rectifier board test point: burnt mains wire to the transformer
- Game totally dead after running a vacuum from the service outlet: power cord
- Replace filter cap C23 on every game
- Replacing filter cap C23
- Where the power switch is
- How the pre-Xenon power supply works
- Safe first power-up of an unknown game
- MPU LED never does its flash sequence: a filter capacitor had broken off the power board
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)