16
System Case Connections
HD
LE
D
R
ESET
VC
C
5
GN
D
VC
C
5
PWR
L
E
D
PW
R
B
T
N
P
W
RBT
N
PW
R
L
ED
H
DDL
E
RS
T
S
W
NC
GN
D
JW FP
Pin 1
SPEAK
SPKR
GND
NC
VCC5
PWRLED
Pin 1
(5) IDE Activity LED: HD LED
This connector connects to the hard disk activity indicator light on the case.
(6) Power switch: PWR BTN
This 2-pin connector connects to the case-mounted power switch to power ON/OFF the
system.
(7) Speaker connector: SPEAK
This 4-pin connector connects to the case-mounted speaker. See the figure below.
(8) 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.
(9) FAN Headers (3-pin) : SFAN1, SFAN2, CPUFAN
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.
FAN Headers
SFAN2
1
3
CPUFAN
SFAN1
1
3
1
3
