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Technical Reference Guide
Compaq Deskpro EXS and Workstation 300 Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition - December 2000
6-1
Drives
110/230 VAC
115/230 VAC
Select SW
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).
Figure 6–1. Power Distribution and Control, Block Diagram
Power Supply
Assembly
+5 VDC
-5 VDC
+12 VDC
-12 VDC
+5
AUX
CPU, Slots, Chipsets, Logic
& Voltage Regulators
PS
On
Fan
Off
+3.3
AUX
System Board
Power On/Off
Front Bezel
Power On
110 VAC
230 VAC
Mains
Fan
Spd
+5 VDC
+12 VDC
+12.8 VDC