3Com DK8X user manual Reset Switch 2-pin RST, Hard Disk Activity LED 2-pin Hddled

Chapter 2 Hardware Installation

Reset Switch (2-pin RST)

This 2-pin connector connects to the chassis-mounted reset switch for rebooting your computer without turning your power switch off and on. This is a preferred method of rebooting your system to prolong the life of your system’s power supply.

Hard Disk Activity LED (2-pin HDD_LED)

This connector supplies power to the chassis's HDD/IDE activity LED. Read and Write activity by devices connected to the Primary or Secondary IDE connectors will cause the front panel LED to light up.

Speaker Connector (4-pin SPEAKER)

There is one jumper over pin1 and pin2 (default setting) for the internal buzzer. If you want to use the external case-mounted speaker instead of the internal buzzer, remove the jumper and connect the speaker wire to the 4-pin connector.

ATX Power Switch / Soft Power Switch (2-pin PWR_SW)

A momentary switch connected to this 2-pin connector controls the system power. Pressing the button once will switch the system between ON and SLEEP mode. The system power LED shows the status of the system’s power.

System Power LED (3-pin PWR_LED)

This 3-pin connector connects to the chassis-mounted system power LED, which lights up when the system is powered on.

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Hardware Installation 2-19