Acer 5600 series manual Audio board, Label Description

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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 CN18 connector of the
	mainboard
JK1	Microphone-in jack (front) see note
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.