KM400A Series
14
Front Panel Indicator: SW/LED
、
PWRLED
、
SPEAKER
This connector
case. The LED will
flicker during
y attached to the
system board
RST (Re
This connect
lly left open.
When closed
Test).
This connector
case. The LED will
illuminate whi
PWR ON (
This connector
he Power Button
pin to ground fo
(the time required is
e to internal debounce circuitry on the system board). At least two seconds must pass before the
wer supply will recognize another on/off signal.
wer LED )
case. You can attach it to the
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.
HD LED (Hard Drive LED Connector)
can be attached to an LED on the front panel of a computer
disk activity. This disk activity only applies to those IDE drives directl
.
set Button)
or can be attached to a momentary SPST switch. This switch is norma
it will cause the mainboard to reset and run the POST (Power On Self
PWR-LED (2-Pin Power LED Connector)
can be attached to an LED on the front panel of a computer
le the computer is powered on.
Power Button)
can be attached to a front panel power switch. The switch must pull t
r at least 50 ms to signal the power supply to switch on or off
du
po
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
1
1
9
2
BI
O
S
RO
M
1
Au
d
io
Cod
e
c
1
1
S
o
ck
e
t 46
2
1
9
21
0
1
9
2
10
1
5
26
1
9
2
10
2
1
1
9
21
0
1
9
21
0
V
IA
K
M
40
0A
Wi
n
b
o
n
d
W
8
36
97
H
F
1
2
1
S
P
E
AKE
R
1
9
10
PW
R
L
E
D
1
SW
/LE
D
1
9
2
10
BA
T
1
1
9
10
1
2
V
T
6
307
PC_BEEP
+5V
1
4
SPEAKER
NC
Ground
+
-
1
2
3
PWRLED
Power Button (+)
Power Button (-)
Reset Control (-)
Reset Control (+)
1
HD LED (+)
Power LED (+)
Power LED (-)
HD LED (-)
2
NC
NC
9 10
SW/LED
Hard Driver
LED
Power
LED
Power-on
Button
Reset
Button
