System Speaker (Jp18) - Aaeon MB-562 Manual

The CPU card has its own buzzer. You can disable the internal buzzer
and connect an external speaker to JP18.

System speaker (JP18)

Pin Function
1 Vcc
2 Speaker output
3 Buzzer in *
4 Speaker output *
*Default: connect a jumper between pin 3 and pin 4 for internal buzzer
output.
JP19 can be selected as COM2 (RS-232) or IrDA connector active. The
setting is as follows:
* Default
COM2 (RS-232)*
1 2
5 6
IrDA
2
1
6
5
Chapter 2 Installation 27