User`s manual

SBC86831 Series All-In-One Mini ITX Board User’s Manual

Jumpers and Connectors

2.4.14 Flat Panel Bezel Connector: CN20

This connector (CN20) is making the connection to front panel switches

and LEDs.

 Power LED

This 3-pin connector (Pin 1, 3, 5) connects a LED indicator to the

system power switch on the case. Pin 1 is assigned as +, and Pin 5

as -. The Power LED lights up when the system is powered ON.

 External Speaker and Internal Buzzer Connector

This 4-pin connector (Pin 2, 4, 6, 8) can be connected to the case-

mounted speaker unit or internal buzzer. While connecting the CPU

card to an internal buzzer, please short pins 2-4; while connecting

to an external speaker, you need to set pins 2-4 to Open and

connect the speaker cable to pin 8 (+) and pin 2 (-).

 ATX Power On/Off Button

This 2-pin connector (Pin 9, 10) connects the front panel’s ATX

power button to the CPU card, which allows users to control ATX

power supply to be power on/off.

 System Reset Switch

This 2-pin connector (Pin 11, 12) can be connected to the case-

mounted reset switch that reboots your computer, not turns OFF

the power switch. It is a better way to reboot your system for a

longer life of the system’s power supply.

 HDD Activity LED

This connection is linked to hard drive activity LED on the control

panel. LED flashes when HDD is being accessed. The 2-pin

connector (Pin 13, 14) connects the hard disk drive to the front

panel HDD LED, Pin 13 assigned as -, and Pin 14 as +.