Toshiba R400 Back side, switch, the volume, Volume control, Headphone jack, Microphone jack, (USB 2.0) ports, headphones (if connected), monaural microphone input

The Grand Tour

Volume control	Use this dial to adjust the volume of the internal
switch	monaural speaker and optional external stereo
	headphones (if connected).
	Move the Volume control switch to the right to
	increase the volume and to the left to decrease
	the volume.
	Press the Volume control switch to Mute the
	sound. Press the Volume control switch again to
	turn Mute off. The mute icon will be displayed
	when the Volume control switch is pressed. The
	same function can be performed by pressing the
	Fn + Esc keys. Refer to the Hot keys section in
	Chapter 5 for details on the Fn + Esc keys.
Headphone jack	A 3.5 mm mini headphone jack enables
	connection of stereo headphones.
Microphone jack	A 3.5 mm mini microphone jack enables
	connection of a three-conductor mini jack for
	monaural microphone input.

Back side

The following figure shows the computer’s back side.

Universal Serial Bus Ports	DC IN 15V jack	Cooling vents
LAN jack

LAN active indicator (orange) Link indicator (green)

Figure 2-4 The back side of the computer

Universal Serial Bus Two Universal Serial Bus ports, which comply to

(USB 2.0) ports the USB 2.0 standard, are provided on the back side of the computer.

Keep foreign metal objects, such as screws, staples and paper clips, out of the USB connectors. Foreign metal objects can create a short circuit, which can cause damage and fire, possibly resulting in serious injury.

Please note that it is not possible to confirm the operation of all functions of all USB devices that are available. In view of this it may be noted that some functions associated with a specific device might not operate properly.

2-4 User’s Manual