Lenovo ThinkCentre A57 9702 User Manual page 16

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