Audio board
The audio board that came with your computer should look like the
figure that follows.
Label
Description
CN1
USB 1.1 connector
CN2 and
USB ports
CN3
CN4
Standard Audio connector - connects to the CN16 of the
mainboard
CN5
USB connector - connects to the CN3 connector of the
mainboard
JK1
Microphone-in jack (front)
JK2
Audio-out port
JP1
Audio connector
Note: The system has two microphone-in jacks (front and rear).
However, you can not use both of them at the same time. By
default, your system enables the microphone-in jack in front and
disables the one at the back.
see note
59