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2.3.12 System fan headers (J45 and J46)
The system airflow is critical for system’s reliability. Airflow is determined by the size and
number of fans and vents along with the placement in relation to the components and the airflow
channels within the system.
The motherboard supports two extra system fan headers: J45 and J46. Connect the system
cooler’s power cable to these headers to move the air through the chassis.
Signal of J45/J46 header
Pin 3
Ground
Pin 2
+12 V
Pin 1
SENSE
2.3.13 Power On header (PW ON)
This header can be connected to chassis’s power switch. Because of debounce circuitry on the
motherboard, the switch must be pressed for at least 50 ms to signal the power supply to switch on
or off. At least two seconds must pass before the power supply will recognize another on/off
signal.
Note: Hold the power on switch in for four seconds will force the system switch off.
2.3.14 Front panel connector (J36)
This connector contains several headers, which are connected to button or switch located on front
panel of the chassis.
2.3.14.1 IDE LED header (IDE)
The 2-pin IDE LED header is located on pins 5--6 (marked as IDE) of the front panel
connector. It can be connected to an LED on the chassis, which will light up when IDE
devices is working.
Signal of IDE header
Pin 5
Anode (+)
Pin 6
Cathode (-)
2.3.14.2 SCSI LED header (SCSI)
The 2-pin SCSI LED header is located on pins 7--8 (marked as SCSI) of the front panel
connector. It can be connected to an LED on the chassis, which will light up when SCSI
devices is working.
Signal of SCSI header
Pin 7
Anode (+)
Pin 8
Cathode (-)
S
S
