BenQ TH575 3800-Lumen Full HD DLP Home Theater Gaming Projector - Manual (Page 36)

36 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 22 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 41 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.
Lamp information
Getting to know the lamp hour
When the projector is in operation, the duration (in hours) of lamp usage is automatically calculated by
the built-in timer. The method of calculating the equivalent lamp hour is as follows:
Lamp Usage Time = (hours used in
Normal mode) + (hours used in ECO mode) + (hours used in
SmartEco mode) + (hours used in LampSave mode)
Total (equivalent) lamp hour = 3 x (hours used in Normal mode) + 1.5 x (hours used in ECO mode) +
1.5 x (hours used in SmartEco mode) + 1 x (hours used in LampSave mode)
Never use wax, alcohol, benzene, thinner or other chemical detergents. These can damage the case.