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system is in S1/S3 sleep state. The LED is off when the system is in 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. 23)
Power LED Header
(3-pin PLED1)
(see p.2, No. 24)
Chassis, Power and MOS Fan
Connectors
(4-pin CHA_FAN1)
(see p.2, No. 37)
(3-pin CHA_FAN2)
(see p.2, No. 33)
(3-pin CHA_FAN3)
(see p.2, No. 17)
(3-pin CHA_FAN4)
(see p.2, No. 49)
(3-pin PWR_FAN1)
(see p.2, No. 16)
(3-pin MOS_FAN1)
(see p.2, No. 50)
40
CHA_FAN_SPEED
+12V
FAN_SPEED_CONTROL
GND
CHA_FAN_SPEED
+12V
GND
GND
+12V
CHA_FAN_SPEED
ASRock Z77 OC Formula 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/S3 state. The
LED is off in 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.
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