HP Dc7700 HP Compaq dx7300 and dc7700 Business PC Technical Reference Guide, 1 - Page 129

shows the power supply cabling for the SFF/ST systems.

Page 129 highlights

Power and Signal Distribution Figure 7-3 shows the power supply cabling for the SFF/ST systems. Power Supply 403778 P4 P7 P5 P2 P3 P1 P4, P5, P7 5 4321 P2 432 1 P1 13 4 P3 6 1 3 24 1 12 Conn P1 P1 [1] P2 P3 P4, 5, 7 Pin 1 +5 aux +12 +5 RTN +3.3 Pin 2 RTN Pin 3 + 5 +5 sns RTN RTN RTN RTN RTN RTN +5 Pin 4 +5 +5 +12 VccP RTN Pin 5 PS On Pin 6 RTN Pin 7 Pwr Gd Pin 8 +3.3 Pin 9 +3.3 +5 +3.3 RTN +3.3 sns +3.3 VccP +12 +12 Pin 10 Tach +3.3 Pin 11 RTN RTN Pin 12 Fan -12 Connectors not shown to scale. All + and - values are VDC. RTN = Return (signal ground) sns = sense GND = Power ground RS = Remote sense FC = Fan command FO = Fan off FSpd = Fan speed FS = Fan Sink POK = Power OK (power good) VccP = +12 for CPU [1] This row represents pins 13-24 of connector P1 Figure 7-3. SFF/ST Power Cable Diagram Technical Reference Guide www.hp.com 7-9

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Technical Reference Guide
www.hp.com
7-9
Power and Signal Distribution
Figure 7-3 shows the power supply cabling for the SFF/ST systems.
Connectors not shown to scale.
All + and - values are VDC.
RTN = Return (signal ground)
sns = sense
GND = Power ground
RS = Remote sense
FC = Fan command
FO = Fan off
FSpd = Fan speed
FS = Fan Sink
POK = Power OK (power good)
VccP = +12 for CPU
[1] This row represents pins 13–24 of connector P1
Figure 7-3. SFF/ST Power Cable Diagram
Conn
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin
10
Pin
11
Pin
12
P1
+5
aux
RTN
+ 5
+5
PS On
RTN
Pwr Gd
+3.3
+3.3
Tach
RTN
Fan
P1 [1]
+12
+5 sns
RTN
+5
+5
+3.3
RTN
+3.3 sns
+3.3
+3.3
RTN
-12
P2
+5
RTN
RTN
+12
P3
RTN
RTN
RTN
VccP
VccP
+12
P4, 5,
7
+3.3
RTN
+5
RTN
+12
Power Supply
403778
P1
P3
P2
P4
P5
P7
P1
13
1
12
P4, P5, P7
24
1
2
3
4
5
1
2
3
4
P2
P3
1
3
4
6