HP 54520 Series Service Manual page 89

To check power supply voltages
4 Reconnect the mains power cable and check for voltages at the supply output using
values in the following table.
Power Supply/Main Assembly Voltages
Pin Supply Pin Supply Pin Supply Pin Supply
Power Supply connector, P1 and Main Assembly connector, P3 - Pins 1-20
1 +5.20 V 6 Ground a] "$2 16 Ground
2 +5.20 V 7 Ground 12 Ground 17 +12 (Disp)
3 +5.20 V 8 Ground 13 +H12V 18 -52V
4 +5,20 V 9 +3.5V 14 Ground 19 +15.5 V (Fan)
5 Ground (Disp) 10 Ground 15 -12V 20 Ground (Fan)
Power Supply connector, P2 Main Assembly connector, P3
1 -52V 2 -h2V 21 -5.2V 22 -b2V |
5-11