Compaq iPAQ 1.0 - 7.3 Power Distribution

Chapter 7 Power and Signal Distribution
Compaq iPAQ Series of Desktop Personal Computers
Second Edition - February 2001
7-4
7.3 POWER DISTRIBUTION
7.3.1 3.3/5/12 VDC DISTRIBUTION
The 3.3-, 5-, and 12-volt distribution is slightly different between the iPAQ 1.x system and the
iPAQ 2.0 system as described ion the following subsections.
7.3.1.1 iPAQ 1.0/1.2 POWER DISTRIBUTION
The iPAQ 1.0/1.2 power supply assembly includes a multi-connector cable assembly that routes
+3.3 VDC, +5 VDC, -5 VDC, +12 VC, and -12 VDC to the system board as well as to the
individual drive assemblies. Figure 7-2 shows the power supply cabling.
Conn. # Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10
P1 +3.3 +3.3 RTN +5 RTN +5 RTN PwrGd +5 Aux +12
P1 [1] +3.3 -12 RTN PS On RTN RTN RTN FO +5 +5
P3 +12 GND GND +5
NOTES:
[1] This row represents pins 11-20 of connector P1.
All + and - values are VDC
.
RTN = Return (signal ground)
GND = Power ground
PwrGd = Power Good
PS On = Power supply on
FO = Fan off
Figure 7–2. iPAQ 1.0/1.2 Power Cable Diagram
P1
1 2 5 4 3 7 6
12
10
11
8 9
13 14 15 16 17 18 19 20
Power Supply
Assembly
(SP# 159447)
P1
P3
1 2 3 4
P3