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Front Panel Indicator: SW/LED、PWRLED、SPEAKER
PC_BEEP
1
NC
Ground
+5V
4
SPEAKER
1
+
2
-
3
PWRLED
HD LED (Hard Drive LED Connector)
This connector
can be attached to an LED on the front panel of a computer
flicker during
disk activity. This disk activity only applies to those IDE drives directl
system board
.
RST (Re
set Button)
This connect
or can be attached to a momentary SPST switch. This switch is norma
When closed
it will cause the mainboard to reset and run the POST (Power On Self
PWR-LED (2-Pin Power LED Connector)
This connector
can be attached to an LED on the front panel of a computer
illuminate whi
le the computer is powered on.
PWR ON (
Power Button)
This connector
can be attached to a front panel power switch. The switch must pull t
pin to ground fo
r at least 50 ms to signal the power supply to switch on or off
du
e to internal debounce circuitry on the system board). At least two seconds must pass before the
po
wer supply will recognize another on/off signal.
PWRLED (3-Pin Po
If there is a 3-pin power LED cable on the front panel of a computer
3-pin power LED connector.
SPEAKER (Speaker Header)
A front panel s
peaker can be connected to this connector. When you boot your computer, the speaker
sounds a short "beep". If there is something wrong during the Power On Self-Test, the speaker
sounds "irregular beep" to warning you.
1
HD LED (+)
Hard Driver
HD LED (-)
LED
Reset Control (-)
Reset
Reset Control (+)
Button
NC
9 10
SW/LED
wer LED )
14
KM400A Series
1
2
Power LED (+)
Power
Power LED (-)
LED
Power Button (+)
Power-on
Power Button (-)
Button
NC
case. You can attach it to the
case. The LED will
y attached to the
lly left open.
Test).
case. The LED will
he Power Button
(the time required is
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