Rio Salado College ( BPC 125 ) Electronics ON COMPUTER MAINTENANCE Q/A for A+

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Which specific computer components require special care that will protect your safety when handling them? ##What is the proper way to lift heavy objects? ##How can ESD be a hazard to electronic compu... ter components? ##What is the difference between a static shielding bag and a static-resistant bag? ##What steps can you take to reduce ESD if you do not have the proper equipment handy? ##What is the MSDS? When would the information that it provides be important? Power Hazards Any time you work around a computer or any electrical device, remove jewelry to prevent it from getting caught in your equipment or from transferring an electrical charge to your body. Be certain that the grounding pin of the 110 volt plug is intact. Power that comes from the wall is AC, or alternating current. It comes through at between 110 and 120 volts at 60 cycles per second. An alternating current coming out of a wall socket can be enough to stop your heart. Never work on device until you've powered it down and unplugged it from the wall. If you're working on a portable computer, you must first make sure that the battery is removed from the system. Capacitor Hazards A capacitor's ability to store a charge raises a safety concern that other electrical components don't share. Power coming out of a wall is stored in a capacitor in the power supply unit. Even after the power supply unit is unplugged from the wall, a capacitor can hold on to a charge for up to whole seconds instead of milliseconds. [Show More]

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