Power Distribution; 5/12 Vdc Distribution - HP Deskpro EX Technical Reference Manual

7.2

POWER DISTRIBUTION

7.2.1 3.3/5/12 VDC DISTRIBUTION

The 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 for the Deskpro EX desktop (DT) models.
Power Supply
Assembly
(p/n 189801)
Conn. # Pin 1 Pin 2
P1 +3.3 +3.3
P1 [1] +3.3 -12
P5 +5 GND
P2-4 +12 GND
NOTES:
[1] This row represents pins 11-20 of connector P1.
All + and - values are VDC
RTN = Return (signal ground)
GND = Power ground
RS = Remote sense
FO = Fan off
Not connected
Figure 7–2. Deskpro EX DT Power Cable Diagram
P5
P2 P3 P4
P1
Pin 3 Pin 4 Pin 5
RTN +5 RTN
RTN PS On RTN
GND +12
GND +5
.
Compaq Deskpro EX Series of Personal Computers
First Edition - August 2000
Technical Reference Guide
Drive
Assemblies
System
Board
11 12 13 14 15 16 17 18 19 20
1 2
Pin 6 Pin 7 Pin 8
+5 RTN --
RTN RTN --
P5
4 3 2 1
P2-4
1 2 3 4
P1
3 4 5 6 7 8 9 10
Pin 9 Pin 10
+5 AUX +12
+5 +5
7-5