HP Z400 Maintenance And Service Manual page 240

Internal USB 1 2x5
CAUTION:
The 2x5 connector can be mated to either
a wide 2x5 option cable connector or a
narrow 1x5 option cable connector.
To prevent damage to the connectors,
always connect a narrow 1x5 option cable
connector to pins 1,3,5, and 7 only of the
2x5 connector (pin 9 is not keyed on the
connector).
Internal USB 2 2x5
CAUTION:
The 2x5 connector can be mated to either
a wide 2x5 option cable connector or a
narrow 1x5 option cable connector.
To prevent damage to the connectors,
always connect a narrow 1x5 option cable
connector to pins 1,3,5, and 7 only of the
2x5 connector (pin 9 is not keyed on the
connector).
Rear system fan
228 Appendix A Connector pins
Possible equipment damage.
Possible equipment damage.
Pin Signal
1 +5V
2 +5V
3 USB6#
4 USB9#
5 USB6
6 USB9
7 GND
8 GND
9 (not keyed)
10 DETECT
Pin Signal
1 +5V
2 +5V
3 USB7#
4 USB8#
5 USB7
6 USB8
7 GND
8 GND
9 (not keyed)
10 DETECT
Pin Signal
1 GND
2 +12V
3 Tach
4 PWM
ENWW