Solenoid driver board J3 pin functions
Pin 12: 12 V DC in from rectifier A2J3 pin 8 (becomes +5 V). Pin 10: its ground from A2J3 pin 17. Pin 11: 12 V out to the MPU. Pin 6: 230 V DC in; pin 3 its ground. Pin 8: 190 V out to the displays. Pin 5: 43 V for the flipper relay. Pins 23, 24: 43 V solenoid ground. Pins 13-17 and 25: +5 V for the game. Pins 18-22: logic ground. Pins 12 and 10 are the ones to check first for resets.
Systems
Related tips
- Check the wire from a coil back to the solenoid driver board
- One coil dead with a good transistor and power at the coil
- Test solenoid driver transistors with the game off
- AS-2518-16 and AS-2518-22 solenoid driver boards interchange
- The solenoid driver board also carries the 190 V display supply
- Solenoid driver board: transistor, diode, resistor and connector for each driver
- Rebuild the solenoid driver board high-voltage section
- Flippers weak or intermittent from the solenoid driver board
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)