BenQ LK990 User Manual page 7

• Ceiling installation must be done by a qualified professional. Contact your dealer for more information. It is not
recommended you install the projector yourself.
• Only use the projector on a solid, level surface. Serious injury and damage can occur if the projector is dropped.
• Do not use the projector in an environment where extreme temperature occurs. The projector must be used at
temperatures between 32 degrees Fahrenheit (0 degrees Celsius) and 104 degrees Fahrenheit (40 degrees
Celsius).
• Screen damage will occur if the projector is exposed to moisture, dust or smoke.
• Do not cover the vents on the projector. Proper ventilation is required to dissipate heat. Damage to the projector
will occur if the vents are covered.
Adjusting the projector position
Shifting the projection lens
Desk-front
projection
Ceiling mount-front
projection
Vertical shift
Max. 0.6V
1V
Max. 0.6V
Vertical shift
Max. 0.6V
Max. 0.6V
Vertical shift
Normal projection position
Max. 0.25H
Width of projected image
1V
Shift to
left
Max. 0.25H
1H
Shift to
right
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