PC Hardware A Beginner’s Guide

I n one of the true ironies of the computing world, a PC’s biggest enemy is the very thing it must have to operate: the electric ...

theTVsetwhenavacuumcleanerisoperatedonthesameelectricalcircuit.Thestaticyou hear is electrical noise. Nearby electrical storm ca ...

strike. This means that any wires or cables in the area can pick up an electrical spike and pass it to whatever is connected to ...

cause a wide range of problems on a PC or a network. At minimum, all of the data in RAM is usually lost, but depending on the ap ...

Surge Suppressors The most commonly used power protection device is a surge suppressor. This device, which provides protection t ...

Chapter 23: Electrical Power Issues^605 the level of line conditioning performed by a separate line conditioning unit, but a hig ...

(^606) PC Hardware: A Beginner’s Guide  Protection LED Eventually, nearly all MOVs meet with the spike or surge that it cannot ...

Power Controllers Typically, a surge suppressor is placed on the floor and out of sight of the user. A varia- tion on the surge ...

(^608) PC Hardware: A Beginner’s Guide Because they are typically expensive, few PC users use a true line conditioner and use th ...

Chapter 23: Electrical Power Issues^609 EMI and RFI (radio frequency interference) and electric motor noise are the primary elec ...

One thing that is common to all UPS technologies is that the incoming AC power must be converted into DC power for use inside th ...

the number of times the UPS switches and draws on its battery. Each time the standby UPS switches to its battery backup, it shor ...

(^612) PC Hardware: A Beginner’s Guide An on-line UPS supplies power continuously from an AC to DC power inverter. There is no s ...

Chapter 23: Electrical Power Issues^613 and takes power in “gulps” during its fusing processes. Very few UPS units can handle th ...

(^614) PC Hardware: A Beginner’s Guide Figure 23-6. A small portable power supply can provide a notebook or small PC with enough ...

You can also protect a phone line with a separate phone/modem isolator, which is an inexpensive device you can buy at any electr ...

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CHAPTER 24 Troubleshooting PC Hardware 617 Copyright 2001 The McGraw-Hill Companies, Inc. Click Here for Terms of Use. ...

(^618) PC Hardware: A Beginner’s Guide W hen a PC starts to malfunction, sometimes it’s obvious what the problem is and other ti ...

begins going bad, it can pass along power surges, spikes, and low-voltage conditions di- rectly to the devices connected to it. ...