ASROCK M3N78D - V1.0 User Manual page 21

A. Connect Mic_IN (MIC) to MIC2_L.
B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L.
C. Connect Ground (GND) to Ground (GND).
D. MIC_RET and OUT_RET are for HD audio panel only. You don't
need to connect them for AC'97 audio panel.
E. Enter BIOS Setup Utility. Enter Advanced Settings, and then select
Chipset Configuration. Set the Front Panel Control option from
[Auto] to [Enabled].
System Panel Header
(9-pin PANEL1)
(see p.10, No. 19)
Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.10, No. 17)
Power LED Header
(3-pin PLED1)
(see p.10 No. 20)
Chassis and NB Fan Connectors
(3-pin CHA_FAN1)
(see p.10 No. 34)
(3-pin PWR_FAN1)
(see p.10 No. 18)
CPU Fan Connector
(4-pin CPU_FAN1)
(see p.10, No. 35)
FAN_SPEED_CONTROL
This header accommodates
PLED+
PLED-
PWRBTN# several system front panel
GND
functions.
1
DUMMY
RESET#
GND
HDLED-
HDLED+
Please connect the chassis
1
speaker to this header.
SPEAKER
DUMMY
DUMMY
+5V
Please connect the chassis
1
power LED to this header to
PLED-
PLED+
indicate system power status.
PLED+
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
GND
match the black wire to the
+12V
CHA_FAN_SPEED
ground pin.
GND
+12V
PWR_FAN_SPEED
Please connect the CPU fan
4 3 2 1
cable to this connector and
match the black wire to the
GND
+12V
CPU_FAN_SPEED
ground pin.
2 1 2 1 2 1 2 1 2 1