Lenovo ThinkCentre M91 - Manual (Page 16)

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1 Audio line-in connector This connector receives audio signals from an external
audio device, such as a stereo system.
2 Audio line-out connector This connector sends audio signals from the computer
to external devices, such as powered stereo speakers.
3 Microphone connector 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 connector Use this connector to attach headphones to your
computer when you want to listen to music or other
sounds without disturbing anyone.
6. 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 speakers.
c. Connect the speakers to the audio line-out connector or the headphone
connector on the computer. See step 5.
d. Connect the ac power adapter to the ac power source.
7. 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 audio line-out connector or the headphone
connector on the computer. See step 5.
8. Connect any additional devices that you have. Your computer might not
have all connectors that are shown.
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ThinkCentre Safety and Warranty Guide