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Technical Reference Guide
Chapter 6
POWER and SIGNAL
DISTRIBUTION
6.
Chapter 6 POWER SUPPLY AND DISTRIBUTION
6.1 INTRODUCTION
This chapter describes the power supply and method of general power and signal distribution.
Topics covered in this chapter include:
♦ Power supply assembly/control (6.2) page 6-1
♦ Power distribution (6.3) page 6-5
♦ Signal distribution (6.4) page 6-8
6.2 POWER SUPPLY ASSEMBLY/CONTROL
This system features a power supply assembly that is controlled through programmable logic
Figure 6-1). (
igure 6–1. Power Distribution and Control, Block Diagram
P
+5 VDC
-12 VDC
110/230 VAC
AUX
CPU, Slots, Chipsets, Logic
System BoardFront Bezel
+12.8 VDC
+12 VDC
+5 VDC
Fan
Spd
Mains
Power On
Power On/Off
+3.3
AUX
Fan
Off
PS
On
& Voltage Regulators
+5
-5 VDC
+12 VDC
ower Supply
Assembly
Drives
F
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition - January 2003
6-1