Compaq iPAQ 1.0 - Chapter 7 POWER SUPPLY AND DISTRIBUTION; 7.2 Power Supply Assembly;Control

Technical Reference Guide
Compaq iPAQ Series of Desktop Personal Computers
Second Edition - February 2001
7-1
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 7-7
7.2 POWER SUPPLY ASSEMBLY/CONTROL
This system features a power supply assembly that is controlled through programmable logic
(Figure 7-1).
Figure 7–1. Power Distribution and Control, Block Diagram
Drives
+5 VDC
-5 VDC
+12 VDC
-12 VDC
110/220 VAC
+5
AUX
Logic &
Voltage Regulators
PS
On
Fan
Off
System Board
Power On/Off
Power On
110/220 VAC
Select SW
110 VAC
220 VAC
AC Outlet
+3.3
VDC
Power Supply
Assembly
+5 VDC
+12 VDC