Friday, March 6, 2009

Electronics Installers & Repairers

Electrical and electronics installers often fit older manufacturing equipment with new automated control devices. Older manufacturing machines are frequently in good working order, but are limited by inefficient control systems that lack replacement parts. Installers replace old electronic control units with new PLCs. Setting up and installing a new PLC involves connecting it to different sensors and electrically powered devices (electric motors, switches, pumps) and writing a computer program to operate the PLC. Electronics installers coordinate their efforts with other workers installing and maintaining equipment.

Electronic equipment installers and repairers, motor vehicles have a significantly different job. They install, diagnose, and repair communications, sound, security, and navigation equipment in motor vehicles. Most installation work involves either new alarm or sound systems. New sound systems vary significantly in cost and complexity of installation. Replacing a head unit (radio) with a new computer disc (CD) player is quite simple, requiring removing a few screws and connecting a few wires.

Installing a new sound system with a subwoofer, amplifier, and fuses is far more complicated. The installer builds a box, of fiberglass or wood, designed to hold the subwoofer and to fit in the unique dimensions of the automobile. Installing sound-deadening material, which often is necessary with more powerful speakers, requires an installer to remove many parts of a car (seats, carpeting, interiors of doors), add sound-absorbing material in empty spaces, and reinstall the interior parts. They also run new speaker and electrical cables.

 Additional electrical power may require additional fuses; a new electrical line to be run from the battery, through a newly drilled hole in the fire wall into the interior of the vehicle; or an additional or more powerful alternator and/or battery. Repairing automotive electronic equipment is similar to other electronic installation and repair work. Multimeters are used to diagnose the source of the problem. Many parts often are removed and replaced, rather than repaired. 

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