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Chapter 6 Power and Signal Distribution
6.3 POWER DISTRIBUTION
6.3.1 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 6-2 shows the power supply cabling for small form factor series units.
P3-P4
P4
P3
1 2 3 4
To
Drive
Assemblies
P2
P2
P5
P5
4 3 2 1
P y ower Suppl
Assembly
(PN 243891)
2 1
n. Pin 4 Pin 6
Con Pin 1 Pin 2 Pin 3 Pin 5 Pin 7
P1 +3.3 +3.3 RTN +5 RTN +5 RTN
P1 [1] +3.3 -12 FS
P2, 4-7 +5 GND GND +12
+5 Aux FC +12
+12.8
PS On
P3 GND GND +12.8
NOTES:
le.
round)
mand
ed
[1] This row represents pins 8 - 14 of connector P1.
igure 6–2. Small Form Factor Power Cable Diagram
P1
To
System
Board
P1
1
12
11
2
5
4
3
7
6
10
9
13
8
14
4 3
Connectors not shown to sca
All + and - values are VDC
.
RTN = Return (signal g
GND = Power ground
RS = Remote sense
FC = Fan com
FO = Fan off
FSpd = Fan spe
FS = Fan Sink
F
Compaq Evo and Workstation Personal Computers
Featuring the Intel Pentium 4 Processor
Second Edition- January 2003
6-6