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Cleaning and Maintenance Procedures Component Protection and Storage Electrostatic Discharge Precautions and Procedures Safety and Environmental Issues Special Disposal Procedures and Environmental Protection Guidelines
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MIKE MEYERS A+ CERTIFICATION PASSPORT
There s more to keeping a PC running smoothly than launching an occasional CHKDSK or deleting some temporary Internet files PCs are machines, and all machines need regular maintenance This doesn t include changing the oil every 3,000 miles, but it does include things like cleaning and dusting Yes, dusting! Being a PC tech doesn t get you out of housework! Further, don t be fooled by the benign appearance of a typical PC, monitor, or printer Underneath that unassuming beige exterior lurk dozens of voltage-carrying wires and circuits Any one of these can reach out and bite an unwary tech sometimes with deadly effect Finally, you should appreciate that all PCs and PC components have a finite service life Where do old monitors, batteries, and toner cartridges go to die This chapter covers the important cleaning and maintenance routines that you should follow to keep your system in optimal running condition These routines take you into the very guts of your PC, so to prevent damage to your PC and to you, it s vital that you use the right tools and follow proper safety precautions This chapter wraps up with a discussion on how to dispose of dead or obsolete PC equipment properly
Objective 301
Cleaning and Maintenance Procedures
o prolong the life of your PC, you must inspect and clean it regularly Inspecting your PC alerts you to any dangerous or damaging conditions that exist, such as rust and corrosion, damaged connectors, damaged and improperly installed components, frayed cables, loose connections, and heat damage Cleaning your PC rids it of the dirt, dust, and grime that build up from normal use This does more than simply maintain a neat appearance; it helps to prevent two of the most damaging conditions: overheating and electrostatic discharge (ESD)
Local Lingo
ESD ESD is a quick electrical charge that occurs when two objects with different electrical potentials come into contact with each other For more on this subject, see the section Electrostatic Discharge Precautions and Procedures later in this chapter
CHAPTER 3 Maintenance and Safety Precautions
Your cleaning routine should include the PC and monitor case, the monitor screen, the keyboard and mouse, and any printer, switch, scanner, and other device connected to the PC Don t forget the inside of the PC case, the motherboard, adapter cards, drives, and power supply Following is a look at the safest cleaning compounds and tools you can use to keep your PC looking and running its best, plus steps for properly cleaning and maintaining your PC, monitor, and peripherals
Exam Tip
Regular cleaning of the PC will prolong the life of your components, help to prevent ESD, and help to prevent overheating
Liquid Cleaning Compounds
You can safely use several kinds of liquid cleaners on the PC, from plain water to specially-formulated commercial compounds
Clean or Soapy Water
Many cleaning chores require nothing more than a cloth dampened with some clean water Common tap water is usually fine, but some local water is heavy with minerals and may leave a residue If this is the case in your area, filtered or distilled water is a better choice If water alone cannot do the job, use a mild soap solution Dish soap is best, but make certain that you dilute it thoroughly
Denatured Alcohol
Use denatured alcohol to clean electrical contacts and components such as the drive heads on removable media drives Make certain, however, that you never use alcohol on mechanisms such as motors or rubber drive belts The alcohol dissolves the lubricants in motor bearings, and rubber belts may stretch or become brittle when exposed to alcohol
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