VIA Technologies NAB-7400 User Manual page 21

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Case Connector: F_PANEL
The F_PANEL pin header allows you to connect the power switch, reset switch,
power LED, sleep LED, HDD LED and the case speaker.
Pin
Signal
1
+5V
3
+5V
5
-PLED_2
7
+5V
9
NC
11
NC
13
SPEAK
15
Key
HDD LED (HD_LED): pin 2 & pin 4
HDD LED shows the activity of a hard disk drive. Avoid turning the power off
when the HDD LED still has a lit. Connect the HDD LED from the system case
to this pin.
Power Switch (PW_BN): pin 6 & pin 8
Connect to a 2-pin power button switch. Pressing this button will turn the
system power on or off.
Reset Switch (RST_SW): pin 10 & pin 12
The reset switch is used to reboot the system rather than turning the power
ON/OFF. Avoid rebooting the system, if the HDD is still working. Connect
the reset switch from the system case to this pin.
Sleep LED (-SLEEP_LED): pin 14 and pin 16
Power LED (-PLED_2): pin 1 & pin 5, or pin 3 & pin 5
The LED will light when the system is on. If the system is in S1 (POS - Power
On Suspend) or S3 (STR - Suspend To RAM) state, the LED will blink.
Speaker (SPEAK): pin 7 & pin 13
The speaker from the system case is connected to this pin.
Pin
Signal
2
+5V
4
HD_LED
6
PW_BN
8
GND
10
RST_SW
12
GND
14
+5V
16
-SLEEP_LED
13
Installation
F_PANEL
1
2
15
16

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