IBM NetVista A21, Быстрая справка

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Audio line-in This connector receives audio signals from an
external audio device, such as a stereo system.
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Audio line-out This connector sends audio signals from the
computer to external devices, such as powered stereo
speakers.
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Microphone Use this connector to attach a microphone to your
computer when you want to record sound or if you
use speech-recognition software.
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Headphone Use this connector to attach headphones to your
computer when you want to listen to music or other
sounds without disturbing anyone.
7. If you have powered speakers with an ac adapter, use the following
instructions.
a. Connect the cable that runs between the speakers, if necessary. On
some speakers, this cable is permanently attached.
b. Connect the power-supply cable to the speaker.
c. Connect the speakers to the computer.
d. Connect the power supply to the ac power source.
8.
If you have unpowered speakers with no ac adapter, use the following
instructions.
a. Connect the cable that runs between the speakers, if necessary. On
some speakers, this cable is permanently attached.
b. Connect the speakers to the computer.
Chapter 2. Setting up your computer
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