Dell Precision 410 User Manual

Also see for Vostro 410: Setup guide User guide Service manual Setup and quick reference guide Documentation update

Contents

Dell Precision 410 User Manual Manual pdf 131 page image

Maintaining the System D-5from the computer to other devices through the alternat-ing current (AC) power cable and power source orthrough the air like transmitted radio waves. The FederalCommunications Commission (FCC) publishes specificregulations to limit the amount of EMI and RFI emittedby computing equipment. Each Dell system meets theseFCC regulations.To reduce the possibility of EMI and RFI, follow theseguidelines:• Operate the system only with the computer coverinstalled.• Ensure that all expansion slots are covered either bya card-mounting bracket or by a metal filler bracketand that all drive bays have a drive and/or a metalinsert installed. These brackets and metal inserts areavailable from Dell.• Ensure that the screws on all peripheral cable con-nectors are securely fastened to their correspondingconnectors on the back of the computer.• Always use shielded cables with metal connectorshells for attaching peripherals to the computer.To prevent the possibility of RFI from a computer affect-ing TV reception, follow these guidelines:• Keep any TV set at least 6 ft away from the com-puter system.• Use cable TV when possible.• Use a directional outdoor TV antenna.• Attach line filters to the TV set.• Use 75-ohm coaxial cable for the TV set rather thantwin-lead antenna wire.• If interference occurs, rotate the computer or the TVset 90 degrees.MagnetismBecause they store data magnetically, diskettes and hard-disk drives are extremely susceptible to the effects ofmagnetism. Diskettes should never be stored near mag-netic sources such as the following:• Monitors• TV sets• Printers• Telephones with real bells• Fluorescent lightsShock and VibrationExcessive shock can damage the function, externalappearance, and physical structure of a system. Each Dellsystem has been designed to operate properly after with-standing a minimum of six consecutively executed shockpulses in the positive and negative x, y, and z axes. Eachshock pulse can measure up to 50 gravities (G) for up to2 milliseconds (ms). In storage, the system can withstandshock pulses of 92 G for 2 ms.Excessive vibration can cause the same problems as men-tioned earlier for shock, as well as cause components tobecome loose in their sockets or connectors. Systems canbe subject to significant vibration when being transportedby vehicle or when operated in an environment withmachinery that causes vibration.Each Dell system, when operating, is designed to with-stand 0.25 G (half-sine wave) at a sweep of 3 to 200 hertz(Hz) for 15 minutes. In storage, the system can withstand0.5 G at 3 to 200 Hz for 15 minutes.Power Source InterruptionsComputer systems are especially sensitive to variationsin voltage supplied by the AC power source. Over-voltage, undervoltage, and transients (or spikes) can erasedata from memory or even cause components to fail. Toprotect against these types of problems, power cablesshould always be properly grounded and one or both ofthe following methods should be used:• Use one of the power protection devices described inthe following section, “Power Protection Devices.”• Place the system on a dedicated power circuit (ratherthan sharing a circuit with other heavy electricalequipment). In general, do not allow the system toshare a circuit with any of the following:— Kitchen appliances— Copier machines— Air conditioners— Vacuum cleaners— Space heaters