Dell OptiPlex 755 Quick Reference Guide - Page 20
Back Panel Connectors, connectors. See Back Panel Connectors - user manual
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3 voltage selection Your computer is equipped with a manual voltage-selection switch 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. 4 power connector Insert the power cable. 5 back panel connectors Plug serial, USB, and other devices into the appropriate connectors. See "Back Panel Connectors" on page 20. 6 card slots (4) Access connectors for any installed PCI or PCI Express cards, PS/2 connector, eSATA connector, etc. Back Panel Connectors 1 2 34 5 6 9 8 7 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" in the User's Guide. 20 Quick Reference Guide