3 power distribution – Compaq 4000N User Manual
Page 138
Chapter 7 Power and Signal Distribution
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September 1997
7-4
7.3
POWER DISTRIBUTION
7.3.1
3.5/5/12 VDC DISTRIBUTION
The power supply assembly includes a connector (P1) that mates directly with the system board
connector (P17) when the assembly is installed. The power supply assembly also includes a cable
assembly that routes +3.5 VDC, +5 VDC, -5 VDC, +12 VC, and -12 VDC to the individual drive
assemblies.
Connector
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
P1
+3.5
+3.5RS
RTN
+5
RTN
+5
RTN
+3.5
-12
FO
P1 [2]
PS On
+5AUX
RS rtn
+12
RTN
RSRTN
RTN
-5
+5
+5
P2
+5
GND
GND
+12
P3
+12
GND
GND
+5
NOTES:
[1] Connector P1 mates directly with connector P17 on the system board.
[2] This row represents pins 11-14 of connector P1.
All + and - values are VDC
.
RTN = Return (signal ground)
GND = Power ground
RS = Remote sense
FO = Fan off
Figure 7–2. Power Cable Diagram
Power Supply
Assembly
Drive
Assemblies
P1 [1]
P3
P2
1 2 3 4
P3
P2
4 3 2 1
P1
1
12
11
2
5
4
3
7
8
6
9
14
10
13