Power Distribution - HP dx7300 Technical Reference Manual

Power and Signal Distribution
7.3

Power Distribution

The power supply assembly includes a multi-connector cable assembly that routes +3.3 VDC, +5
VDC, +5 VDC STB, +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 Ultra Slim Desktop form factor.
Power Supply
403777
Conn Pin 1
P1 +5
aux
P1 [1] +12
P2 +3.3
P3 RTN
NOTES:
Connectors not shown to scale.
All + and – values are VDC.
RTN = Return (signal ground)
sns = sense
GND = Power ground
RS = Remote sense
FO = Fan off
FSpd = Fan speed
FS = Fan Sink
FC = Fan Command
Vccp = +12 VDC for CPU
[1] This row represents pins 13 – 24 of connector P1.
Figure 7-2. USDT Power Cable Diagram
7-8
Pin 2 Pin 3 Pin 4 Pin 5
RTN + 5 +5 PS On
+5 sns RTN +5 +5
RTN +5 RTN +12
RTN RTN VccP VccP
www.hp.com
P2
P3
5 4 3 2
P2
P1
13
1
Pin 6 Pin 7 Pin 8
RTN Pwr Gd +3.3
+3.3 RTN +3.3 sns
+12
1
6
4 P3
1
3
P1
24
12
Pin Pin Pin
Pin 9 10 1 1 12
+3.3 Tach RTN Fan
+3.3 +3.3 RTN - 1 2
Technical Reference Guide