Acer Veriton 3300 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
JP1	Audio connector - connects to the AUDIO2 connector of
	the mainboard
CN1	USB connector - connects to the USB2 connector of the
	mainboard
CN2 and CN3	USB ports
JK1	Microphone-in port see note
JK2	Audio-out port

Note: The system has two microphone-in ports (front and rear). However, you can not use both of them at the same time. The default setting for your system enables the microphone-in port in front and disables the one at the back.