Lenovo THINKSTATION 4105 - Manual (Page 14)

7 Audio line-out connector (side speaker
connector)
When used with 7.1 surround speakers, this connector should
be attached to the side left and right speakers.
8 Optical SPDIF (Sony Philips Digital
Interconnect Format) in connector
Used to receive 5.1 digital audio signals from an external device,
such as a receiver or other multimedia devices, through a
TOSLINK (ToshibaLink) optical cable.
9 Optical SPDIF out connector Used to send 5.1 digital audio signals from a computer to an
external device, such as an amplifier or a receiver, through a
TOSLINK optical cable.
6. If you have powered speakers with an ac power adapter:
F_LR
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.
7. If you have unpowered speakers with no ac power adapter:
F_LR
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.
8. Connect any additional devices that you have. Your computer might not have all the connectors that
are shown.
8 ThinkStation User Guide