Dell OptiPlex 755 - Manual (Page 181)

Back View
Back Panel Connectors
8 headphone
connector Use the headphone connector to attach headphones and most kinds of
speakers.
9 microphone
connector Use the microphone connector to attach a microphone.
10 3.5-inch drive
bay
Can contain an optional slimline floppy drive or optional media card
reader.
11 5.25-inch
drive bay
Can contain a slimline optical drive. Insert a CD or DVD (if supported) into
this drive.
1 card slots Access connectors for any installed PCI cards, PCI Express cards, PS/2,
eSATA, and so on.
2 back panel
connectors
Plug serial, USB, and other devices into the appropriate connectors (see
Back Panel Connectors ).
3 power
connector
Insert the power cable.
4 voltage
selection
switch
Your computer is equipped with a manual voltage-selection switch. To
help avoid damaging a computer with a manual voltage selection switch,
set the switch for the voltage that most closely matches the AC power
available in your location.
NOTICE: In Japan, the voltage selection switch must be set to the 115-V
position.
Also, ensure that your monitor and attached devices are electrically rated
to operate with the AC power available in your location.
5 padlock ring Insert a padlock to lock the computer cover.
6 cover release
latch
Allows you to open the computer cover.
1 parallel
connector
Connect a parallel device, such as a printer, to the parallel connector. If
you have a USB printer, plug it into a USB connector.
NOTE: The integrated parallel connector is automatically disabled if the
computer detects an installed card containing a parallel connector
configured to the same address. For more information, see
System
Setup Options .
2 link integrity
light
l Green — A good connection exists between a 10-Mbps network
and the computer.
l Orange — A good connection exists between a 100-Mbps
network and the computer.
l Yellow — A good connection exists between a 1-Gbps (or 1000-
Mbps) network and the computer.
l Off — The computer is not detecting a physical connection to the
network.