Cleaning Procedure For The Cover Glass - NEC NP-U321H User Manual

Appendices
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Cleaning procedure for the cover
glass
If the cover glass of projection lens is dusty or blemished,
please clean it as following procedure:
1. Turn off the projector and cool projector down for a while.
2. Unplug the power cord from outlet.
3. Blow the dust by blower for cameras which you could buy
from camera shops.Wipe the cover glass gently using a
cleaning cloth.
CAUTION:
• Make sure to use a commercially available cleaning cloth for wiping the mirror
or lens
• Please do not wipe the cover glass hard because that may cause serious damage
on the surface of it.
• Wiping might scratch the cover glass. Optical performance of the projector will
thus be impacted if cover glass is scratched after wiping. Optical performance
impact will be dependent on the scratch condition of it.
• Do not use liquid cleaners or chemicals on the cloth because it may contaminate
the cloth and cause serious damage on the surface of cover glass.
• Do not use a spray containing flammable gas to get rid of accumulated dust on
the cover glass. It may cause of fire.