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This section explains the name and function of each component of the PC main unit, motherboard/
riser board, and keyboard.
■ Front of the PC main unit
1 Name and Function of Each
Component
Sound volume
The sound volume of speakers and headphones can be controlled.
Headphone terminal
Connect a headphone.
USB connector
Connect the USB device.
Keep the cover closed when not used.
Power lamp
The lamp comes on while the PC main unit is on.
Hard disk access indicator lamp
The lamp comes on while accessing a hard
disk.
Floppy disk access indicator lamp
The lamp comes on while accessing a
floppy disk.
Floppy disk drive
Mount a floppy disk in this drive to write
data into or read data from a floppy disk.