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Adjust the monitor so the top of the screen is at, or slightly below, eye level. Place the monitor at a
comfortable viewing distance, usually 51 to 61 cm (20 to 24 inches), and position it so you can view it
without having to twist your body. Also, position other equipment you use regularly, such as the telephone or
a mouse, within easy reach.
Glare and lighting
Position the monitor to minimize glare and reflections from overhead lights, windows, and other light sources.
Reflected light from shiny surfaces can cause annoying reflections on your monitor screen. Place the
monitor at right angles to windows and other light sources, when possible. Reduce overhead lighting, if
necessary, by turning off lights or using lower wattage bulbs. If you install the monitor near a window, use
curtains or blinds to block the sunlight. You can adjust the brightness and contrast controls on the monitor
as the room lighting changes throughout the day.
Where it is impossible to avoid reflections or to adjust the lighting, an antiglare filter placed over the screen
might be helpful. However, these filters might affect the clarity of the image on the screen; try them only after
you have exhausted other methods of reducing glare.
Dust buildup compounds problems associated with glare. Remember to clean your monitor screen
periodically using a soft cloth as directed in your monitor documentation.
Air circulation
The computer has a fan that pulls in fresh air and forces out hot air throng vents. Blocking the air vents can
cause overheating, which might result in a malfunction or damage. Place the computer by the following
instructions so that nothing blocks the air vents; Also, make sure the vented air is not blowing on people.
• Ensure that there is not any block before system inlet about 2cm;
• Ensure that there is not any block before system outlet about 2cm.
Attention: If the system inlet or outlet is blocked, it will cause system thermal failure.
Electrical outlets and cable lengths
The location of electrical outlets, the length of power cords and cables that connect to the monitor, printer,
and other devices might determine the final placement of your computer.
When arranging your workspace:
• Avoid the use of extension cords. When possible, plug the computer power cord directly into an electrical
outlet.
• Keep power cords and cables neatly routed away from walkways and other areas where they might
get kicked accidentally.
For more information about power cords, see “Power cords and power adapters” on page vi
.
32 ThinkCentre M93z User Guide