6-2 Preventive MaintenanceThis section contains general information for cleaning and checking the system, keyboard, andmonitor.The system unit, keyboard, and monitor require cleaning and checking at least once a year, andmore often if operating in a dusty environment. No other scheduled maintenance is required.Unplug all power cords before performing any maintenance. Voltage ispresent inside the system and monitor even after the power is off. All voltage is removed onlywhen the power cord is unplugged.System CleaningUse the following procedure for cleaning the system.1. Power off the system and unplug all power cables.2. Wipe the outside of the system, keyboard, mouse, and monitor with a soft, clean cloth.Remove stains with a mild detergent. Do not use solvents or strong, abrasive cleaners onany part of the system.3. Clean the monitor screen with a commercial monitor screen cleaning kit. As an alternative,use a glass cleaner, then wipe with a clean lint-free cloth.4. Local distributors and dealers may sell diskette drive head cleaning kits. These kits containspecial diskettes and cleaning solution. Do not use the abrasive head cleaning kits (kitswithout cleaning solution).Insert the diskette immediately after powering on the system, before disk bootup. Allow thediskette drive heads to clean for about 30 seconds.Keyboard CleaningAs necessary, inspect and clean the inside of the keyboard as follows.1. Turn the keyboard over and remove the screws holding the keyboard enclosure together.The keyboard and cable together are considered a whole-unit, field-replaceable assembly. Therefore, disassembly of the keyboard is necessary only when cleaningthe inside.2. Separate the two halves of the enclosure.3. Clean the enclosure and keys with a damp cloth. Use a small, soft-bristle brush to cleanbetween the keys.Do not wet or dampen the keyboard’s printed circuit board. If the board gets wet,thoroughly dry it before reattaching the keyboard to the system unit.
