Dell OptiPlex 755 Quick Reference Guide - Page 30
User's Guide, parallel connector con d to the same address. For more
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4 voltage selection switch 5 padlock ring 6 cover-release latch 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. Insert a padlock to lock the computer cover. Allows you to open the computer cover. 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. 30 Quick Reference Guide