Users Guide

keyboard when they are not in use. Also, commercially available keyboard membrane covers make it possible to use
the keyboard while providing protection against foreign particles.
However, regardless of any protective covers, the monitor and keyboard must be cleaned occasionally. To clean the
exterior of the system, monitor, and keyboard, perform the following steps:
Turn off the system, monitor, and any other attached peripherals, and disconnect them from their electrical outlets.
1. Use a vacuum cleaner to remove any dust from the slots and holes on the system and between the keys on the
keyboard.
2. Moisten a soft cleaning cloth with a solution of three parts water and one part liquid dishwashing detergent. Do
not soak the cloth in the solution; you must not let the solution drip inside the system or keyboard.
3. Use the moistened cloth to wipe the system cover, the keyboard, and the exterior of the monitor, including the
screen.
Cleaning Drives
CAUTION: Do not attempt to clean drive heads with a swab. You may accidentally misalign the heads,
rendering the drive inoperable.
You can clean the heads of your diskette drives by using a commercially available diskette-drive head-cleaning kit.
These kits include diskettes pretreated with a chemical solution to nonabrasively remove contaminants that accumulate
on the drive heads during normal operation.
If the kit does not contain instructions, insert one of the pretreated diskettes into a diskette drive and turn on the system.
After 20 or 30 seconds, remove the diskette from the drive. Repeat this procedure for each diskette drive in the system.
Environmental Factors
This section discusses various environmental factors that can adversely affect system performance and longevity.
Temperature
Temperature extremes can cause a variety of problems, including premature aging and failure of chips or mechanical
failure of devices. Extreme temperature fluctuations can cause chips to become loose in their sockets and can cause
expansion and contraction of disk drive platters, resulting in read or write data errors. When you perform a low-level
format operation on a hard-disk drive, it is important to ensure that the drive's surrounding temperature is at or near the
temperature at which the drive will be operated. Failure to do so can result in relocation of the tracks on the disk
platters.
To minimize the negative effects of temperature on system performance, follow these guidelines:
Ensure that the system is operated in an environment no colder than 10° Celsius (C) (50° Fahrenheit [F]) or hotter
than 35° C (95° F).
Ensure that the system has adequate ventilation. Do not place it within a closed-in wall unit or on top of cloth
material, which can act as insulation. Do not place it where it will receive direct sunlight, particularly in the
afternoon. Do not place it next to a heat source of any kind, including heating vents during winter.
Adequate ventilation is particularly important at high altitudes. System performance may not be optimum when the
system is operating at high temperatures as well as high altitudes.
Make sure that all slots and openings on the system remain unobstructed, especially the fan vent on the back of