Technical Reference Guide
Chapter 7
POWER and SIGNAL
DISTRIBUTION
7.
Chapter 7 POWER SUPPLY AND DISTRIBUTION
7.1 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 (7.2) page 7-1
♦ Power distribution (7.3) page 7-5
♦ Signal distribution (7.4) page 7-8
7.1 POWER SUPPLY ASSEMBLY/CONTROL
This system features a power supply assembly that is controlled through programmable logic
(Figure 7-1).
Power On
Front Bezel
Power On/Off
System/Backplane Board
Fan
Off
PS
On
Slots, Chipsets, Logic
& Voltage Regulators
Power Supply
Assembly
110/230 VAC
Mains
230 VAC
110 VAC
110/230 VAC
Select SW
+5 VDC
+12 VDC
-12 VDC
+5
AUX
+3.3
AUX
Fan
Spd
Drives
Figure 7–1. Power Distribution and Control, Block Diagram
Compaq Deskpro and Evo Personal Computers
Featuring Intel Celeron and Pentium III Processors
Fifth Edition - March 2002
7-1
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