Apple G4 manual Power Supply 22-Pin Connector and 4-Pin Connector

Troubleshooting General/ Power Supply Verification - 28

+12V Pin 2

+12V Pin 1

GND Pin 11 +12V Pin 10 +25V Pin 9 +3.3VPin 8 GND Pin 7 +5V Pin 6 GND Pin 5 +5V Pin 4 GND Pin 3 +3.3V Pin 2

+3.3VPin 1

COM Pin 4

COM Pin 3

Pin 22+25V TRKL Pin 21+5V

Pin 20+5V

Pin 19GND

Pin 18GND

Pin 17GND

Pin 16GND

Pin 15[Power On] Pin 14GND

Pin 13-12V

Pin 12+3.3V

Figure 3. Power Supply 22-Pin Connector and 4-Pin Connector

Note: The four-pin connector (P4) supplies power to the multiprocessor.