17
(2) USB Port Headers (9-pin): USB1/USB2
These headers are used for connecting the additional USB port plug. By attaching an
option USB cable, your can be provided with two additional USB plugs affixed to the
back panel.
USB Port Headers
Pin 1
USB1
VCC
-
DATA
G
ND
+D
AT
A
VCC
NC
-
DATA
GN
D
+D
AT
A
Pin 1
USB2
VCC
-
DA
TA
G
ND
+DA
TA
VC
C
NC
-
DATA
G
ND
+D
AT
A
(3) Speaker connector: SPEAKER
This 4-pin connector connects to the case-mounted speaker. See the figure below.
(4) Power LED: PWR LED
The Power LED is light on while the system power is on. Connect the Power LED
from the system case to this pin.
(5) IDE Activity LED: HDD LED
This connector connects to the hard disk activity indicator light on the case.
(6) Reset switch lead: RESET
This 2-pin connector connects to the case-mounted reset switch for rebooting your
computer without having to turn off your power switch. This is a preferred method of
rebooting in order to prolong the lift of the system’s power supply. See the figure
below.
(7) Power switch: PWR BTN
This 2-pin connector connects to the case-mounted power switch to power ON/OFF the
system.
System Case Connections
HDL
E
D
R
ESET
VCC5
GND
VCC5
P
W
R L
E
D
P
W
RBTN
PW
R
B
T
N
PW
RL
ED
HDDLE
RS
T
S
W
NC
G
ND
JW FP
Pin 1
SPEAK
SPK
R
GND
NC
VCC5
Pin 1
PWRLED
Pin 1
(8) FAN Power Headers: SYSFAN1, SYSFAN2, CHAFAN (3-pin), CPUFAN (4-pin)
These connectors support cooling fans of 350mA (4.2 Watts) or less, depending on the
fan manufacturer, the wire and plug may be different. The red wire should be positive,
while the black should be ground. Connect the fan’s plug to the board taking into
consideration the polarity of connector.
