HP dx2390 Service Reference Guide: HP Compaq dx2390 Business PC - Page 78
-Pin MicroFit Power, 4-Pin Power (for CPU
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Pin Signal 1 +3.3V 2 +3.3V 3 GND 4 +5V 5 GND 6 +5V Pin Signal 7 GND 8 POK 9 +5 Vaux 10 +12V 11 +12V 12 +3.3V Pin Signal 13 +3.3V 14 -12V 15 GND 16 PSON 17 GND 18 GND Pin Signal 19 GND 20 open 21 +5V 22 +5V 23 +5V 24 GND 24-Pin MicroFit Power Connector 24 13 12 Pin Signal 1 +5 Vaux 2 GND 3 +5V 4 +5V 5 PS_ON 6 GND 1 Pin Signal 7 PWRGD 8 +3.3V 9 +3.3V 10 Tach 11 GND 12 Fan-CMD Front Pin Signal 13 +12V 14 +5V Sense 15 GND 16 +5V 17 +5V 18 +3.3V Pin Signal 19 GND 20 +3.3V 21 Sense 22 +3.3V 23 +3.3V 24 GND 4-Pin Power (for CPU) Connector and Icon Pin Signal 1 GND 2 GND 3 +12V CPU 4 -12V CPU 72 Appendix A Connector Pin Assignments
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
1
2
3
4
5
6
+3.3V
+3.3V
GND
+5V
GND
+5V
7
8
9
10
11
12
GND
POK
+5 Vaux
+12V
+12V
+3.3V
13
14
15
16
17
18
+3.3V
–12V
GND
PSON
GND
GND
19
20
21
22
23
24
GND
open
+5V
+5V
+5V
GND
24-Pin MicroFit Power
Connector
24
12
13
1
Front
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
1
2
3
4
5
6
+5 Vaux
GND
+5V
+5V
PS_ON
GND
7
8
9
10
11
12
PWRGD
+3.3V
+3.3V
Tach
GND
Fan-CMD
13
14
15
16
17
18
+12V
+5V Sense
GND
+5V
+5V
+3.3V
19
20
21
22
23
24
GND
+3.3V
Sense
+3.3V
+3.3V
GND
4-Pin Power (for CPU)
Connector and Icon
Pin
Signal
1
2
3
4
GND
GND
+12V CPU
-12V CPU
72
Appendix A
Connector Pin Assignments