Service manual

Power System 4-3
Power Supply Features
• 90–264 Vrms input
• 450 watts output. Output voltages are as follows:
Output Voltage Min. Voltage Max. Voltage Max. Current
+5.0 4.85 5.25 50
+3.43 3.400 3.465 75
+12 11.5 12.6 11
–12 –10.9 –13.2 0.2
–5.0 –4.6 –5.5 0.2
Vaux 8.5 9.5 0.05
• Remote sense on +5.0V and +3.43V
+5.0V is sensed on all CPUs in the system, the system bus motherboard, and the
PCI bus motherboard(s).
+3.43V is sensed on all CPUs in the system and the system bus motherboard.
• Current share on +5.0V, +3.43V, and +12V.
• 1 % regulation on +3.43V.
• Fault protection (latched). If a fault is detected by the power supply, it will shut
down. The faults detected are:
Overvoltage
Overcurrent
Power overload
• DC_ENABLE_L input signal starts the DC outputs.
• POK_H output signal indicates that the power supply is operating properly.