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2.3.12 Fan header (FAN5)
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 one extra system fan header: FAN5. Connect the system cooler’s power
cable to this header to move the air through the chassis.
Signal of FAN3 header
Pin 1 ---------- Ground
Pin 2 ---------- +12 V
Pin 3 ---------- SENSE
2.3.13 Power On header (PWR 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 (J43)
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 (ALED)
The 2-pin IDE LED header is located on pins 5--6 (marked as ALED) 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 ALED header
Pin 5 ---------- Anode (+)
Pin 6 ---------- Cathode (-)
2.3.14.2 SCSI LED header (SLED)
The 2-pin SCSI LED header is located on pins 7--8 (marked as SLED) 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 SLED header
Pin 7 ---------- Anode (+)
Pin 8 ---------- Cathode (-)
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