BenQ LH730 4000-Lumen Full HD LED DLP Projector - Manual (Page 47)

47 Maintenance
Maintenance
Care of the projector
Cleaning the lens
Clean the lens whenever you notice dirt or dust on the surface. Please be sure to turn off the
projector and let it cool down completely before cleaning the lens.
• Use a canister of compressed air to remove dust.
• If there is dirt or smears, use lens-cleaning paper or moisten a soft cloth with lens cleaner and
gently wipe the lens surface.
• Never use any type of abrasive pad, alkaline/acid cleaner, scouring powder, or volatile solvent,
such as alcohol, benzene, thinner or insecticide. Using such materials or maintaining
prolonged contact with rubber or vinyl materials may result in damage to the projector surface
and cabinet material.
Cleaning the projector case
Before you clean the case, turn the projector off using the proper shutdown procedure as
described in Shutting down the projector on page 27 and unplug the power cord.
• To remove dirt or dust, wipe the case with a soft, lint-free cloth.
• To remove stubborn dirt or stains, moisten a soft cloth with water and a neutral pH detergent.
Then wipe the case.
Storing the projector
If you need to store the projector for an extended time, please follow the instructions below:
• Make sure the temperature and humidity of the storage area are within the recommended
range for the projector. Please refer to Specifications on page 51 or consult your dealer about
the range.
• Retract the adjuster feet.
• Remove the battery from the remote control.
• Pack the projector in its original packing or equivalent.
Transporting the projector
It is recommended that you ship the projector with its original packing or equivalent.
Light source information
Getting to know the light hour
When the projector is in operation, the duration (in hours) of light source usage is automatically
calculated by the built-in timer. The method of calculating the equivalent light hour is as
follows:
1. Light Usage Time = (x+y+z) hours, if
Time used in Normal mode = x hours
Never use wax, alcohol, benzene, thinner or other chemical detergents. These can damage the case.