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RESET (Reset Switch):
Connect to the reset switch on the chassis front panel. Press the reset
switch to restart the computer if the computer freezes and fails to per-
form a normal restart.
PLED (System Power LED):
Connect to the power status indicator on the chassis front panel. The
LED is on when the system is operating. The LED keeps blinking
when the sys-tem is in S1 sleep state. The LED is off when the system
is in S3/S4 sleep state or powered off (S5).
HDLED (Hard Drive Activity LED):
Connect to the hard drive activity LED on the chassis front panel. The
LED is on when the hard drive is reading or writing data.
The front panel design may differ by chassis. A front panel module
mainly consists of power switch, reset switch, power LED, hard drive
activity LED, speaker and etc. When connecting your chassis front
panel module to this header, make sure the wire assignments and the
pin assign-ments are matched correctly.
Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.2 No. 21)
Power LED Header
(3-pin PLED1)
(see p.2 No. 24)
Chassis and Power Fan Connectors
(4-pin CHA_FAN1)
(see p.2 No. 22)
(3-pin CHA_FAN2)
(see p.2 No. 41)
(3-pin CHA_FAN3)
(see p.2 No. 42)
(3-pin PWR_FAN1)
(see p.2 No. 1)
30
1
PLED-
PLED+
PLED+
CHA_FAN_SPEED
+12V
FAN_SPEED_CONTROL
GND
ASRock A75 Pro4 Motherboard
Please connect the chassis
speaker to this header.
Please connect the chassis
power LED to this header to
indicate system power status.
The LED is on when the system
is operating. The LED keeps
blinking in S1 state. The LED is
off in S3/S4 state or S5 state
(power off).
Please connect the fan cables
to the fan connectors and
match the black wire to the
ground pin. CHA_FAN1/2/3 fan
speed can be controlled through
UEFI or AXTU.
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