14.System panel connector (20-8 pin PANEL)

This connector supports several chassis-mounted functions.

PANEL

 

PLED

 

PLED+

PLED-

M3A78-EM

IDELED+

IDELED-

 

 

+IDE_LED

M3A78-EM System Panel Connector

SPEAKER

+5V

Ground Ground

Speaker

PWR Ground

Reset

Ground

Reset

PWRSW

•System power LED

This 2-pin connector is for the system power LED. Connect the chassis power LED cable to this connector. The system power LED lights up when you turn on the system power, and blinks when the system is in sleep mode.

•Hard disk drive activity LED

This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity

LED cable to this connector. The IDE LED lights up or flashes when data is read from or written to the HDD.

•System warning speaker

This 4-pin connector is for the chassis-mounted system warning speaker. The speaker allows you to hear system beeps and warnings.

•Power/Soft-off button

This 2-pin connector is for the system power button. Pressing the power button turns the system ON or puts the system in SLEEP or SOFT-OFF mode depending on the BIOS settings. Pressing the power switch for more than four seconds while the system is ON turns the system OFF.

•Reset button

This 2-pin connector is for the chassis-mounted reset button for system reboot without turning off the system power.

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Chapter 1: Product introduction