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Technical Reference Guide www.hp.com 7-1
7
Power and Signal Distribution
7.1 Introduction
This chapter describes the power supplies and discusses the methods of general power and signal
distribution. Topics covered in this chapter include:
■ Power distribution (7.2)
■ Power Control (7.3)
■ Signal distribution (7.4)
7. 2 Powe r D i s tr i b u ti o n
Each form factor uses a unique power supply unit (PSU). The PSUs are not interchangeable
between the SFF and MT form factors.
These systems use a power supply assembly contained within the system chassis. Figure 7-1
shows the block diagram for power generation.
Figure 7-1. Power Generation Block Diagram
System Board
Power Supply
Power On
CPU, slots, Chipsets, Logic,
Front Bezel
& Voltage Regulators
Unit
PS On
+5 VDC
+12 VccP
Power Button
POK
+12 VDC
-12 VDC
+3.3 VDC
Drives
+3.3 VDC
+5 VDC
+12 VDC
90 - 264 VAC
5 AUX