Power supply CN1 pinout, pins 7-12
Pin 7: dot matrix high voltage (unused on pre-DMD games). Pin 8: unused. Pin 9: dot matrix high voltage (ground on pre-DMD games). Pins 10 and 11: 9 V AC each to bridge DB1 for the +5 V logic; together they also make the +/-12 V for the sound board. Pin 12: ground return for pins 10 and 11.
Pins 4, 7 and 9 carry display high voltage; do not probe them casually with the game on.
Systems
Related tips
- Power supply board versions are not interchangeable
- Z1 on the power supply is a varistor, not a diac
- Power supply board versions and their +5 V filter capacitors
- Power supply gives no +5 V
- No or low +5 V from the power supply
- A 520-5047-02 supply can stand in for a 520-5047-01
- Won't boot, only some lamps on: bad capacitor joints on the power supply board
- Alphanumeric games need the 520-5000-00 supply
Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Two, Clay Harrell (pinrepair.com)