Power supply output connector pins
A2-J2 (top, to the CPU): pins 1-2 +5 V (red), pin 3 key, pins 4-5 ground, pin 6 -12 V (blue). A2-J3 (right edge, to the displays): pin 1 +60 V, pin 2 key, pin 3 +42 V, pin 5 ground, pin 7 +4 V, pin 8 +8 V; pins 4 and 6 unused.
Systems
Related tips
- System 1 power supply outputs
- No +5 V or only 2.4 V from the power supply
- Replacing power supply filter capacitor C1
- Getting to the power supply solder side
- Power supply voltage drifts or overvoltage trips
- Quick checks on the similar System 1 power supply
- Display high-voltage section of the power supply
- Logic and display reference section of the power supply
Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)