Aaeon MB-562 Manual page 38

This connector provides chip select signal (MCS) and IRQ input
(MIRQ) pins to control external devices such as modem.
The Internal Stereo Line-Out connector provides the non-amplified
output for the stereo channels (left and right). The output is for
attaching powered speakers or an external audio amplifier. When used
in conjunction with the Speaker Out output, the surround sound
function will be activated. The pin assignments appear in the following
table:
Stereo Line-Out Connector (CN8)
Pin Function
1 Line out-R
2 GND
3 GND
4 Line out-L
The Stereo Line-In phone-jack is used to attach stereo devices such as
cassette, digital audio tape, or minidisk players for playback, mixing, or
recording.
The Audio Speaker-Out phone-jack provides the built-in power
amplifier outputs for the left and right stereo channels. When used in
conjunction with Line-Out output, the surround sound function will be
activated.
30 MB-562 User's Manual