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Dell Precision 390 User Manual

Dell Precision 390
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Caring for Your Computer
To help maintain your computer, follow these suggestions:
l To avoid losing or corrupting data, never turn off your computer when the hard drive light is on.
l Schedule regular virus scans using virus software.
l Manage hard drive space by periodically deleting unnecessary files and defragmenting the drive.
l Back up files on a regular basis.
Periodically clean your monitor screen, mouse, and keyboard.
Cleaning Your Computer
Before You Clean Your Computer
Computer, Keyboard, and Monitor
l Use a vacuum cleaner with a brush attachment to gently remove dust from the slots and holes on your computer and from between the keys on the
keyboard.
l To clean your monitor screen, lightly dampen a soft, clean cloth with water. If possible, use a special screen-cleaning tissue or solution suitable for the
monitor's antistatic coating.
l Wipe the keyboard, computer, and plastic part of the monitor with a soft cleaning cloth moistened with a solution of three parts water and one part
dishwashing detergent.
Do not soak the cloth or let water drip inside your computer or keyboard.
Non-Optical Mouse
If your screen cursor skips or moves abnormally, clean the mouse. To clean a non-optical mouse:
1. Turn the retainer ring on the underside of your mouse counterclockwise, and then remove the ball.
2. Wipe the ball with a clean, lint-free cloth.
Environmental
Temperature:
Operating
10°to35°C(50°to95°F)
Storage
40°to65°C(40°to149°F)
Relative humidity
20% to 80% (noncondensing)
Maximum vibration:
Operating
0.25 G at 3 to 200 Hz at 0.5 octave/min
Storage
0.5 G at 3 to 200 Hz at 1 octave/min
Maximum shock:
Operating
bottom half-sine pulse with a change in velocity of
50.8cm/sec(20inches/sec)
Storage
27-G faired square wave with a velocity change of
508cm/sec(200inches/sec)
Altitude:
Operating
15.2 to 3048 m (50 to 10,000 ft)
Storage
15.2 to 10,668 m (50 to 35,000 ft)
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: Before you clean your computer, disconnect the computer from the electrical outlet. Clean your computer with a soft cloth dampened
with water. Do not use liquid or aerosol cleaners, which may contain flammable substances.
NOTICE: Do not wipe the display screen with any soap or alcohol solution. Doing so may damage the antiglare coating.

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Dell Precision 390 Specifications

General IconGeneral
MemoryUp to 8GB DDR2 SDRAM
NetworkIntegrated Gigabit Ethernet
ProcessorIntel Core 2 Duo
ChipsetIntel 975X Express
GraphicsATI FireGL
StorageSATA 3.0Gb/s
Optical DriveDVD-ROM, DVD+/-RW
Operating SystemMicrosoft Windows XP Professional, Red Hat Linux
Power Supply375W
Expansion Slots1 PCI Express x1 slot, 3 PCI slots
PortsUSB 2.0, serial, parallel

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