NEC NP-NC900C-A Service Manual page 6

MAINTENANCE
1. Cleaning the projector
1-1 Cleaning the Cabinet
Refer to the following guide to clean the projector cabinet.
a. Wipe off dust with a clean dampened cloth.
b. Moisten the cloth with warm water and mild detergent and wipe the cabinet.
c. Rinse all detergent from the cloth and wipe the projector again.
CAUTION
To prevent discoloration or fading of the case, do not use abrasive alcohol-based cleaners.
1-2 Cleaning the Lens
Refer to the following guide to clean the projector lens.
a. Apply a little optic lens cleaner to a clean, lint free cloth (do not apply the cleaner directly to the
lens).
b. Lightly wipe the lens in a circular motion.
CAUTION
Do not use abrasive cleaners or solvents.
To prevent discoloration or fading, avoid getting cleaner on the projector case.
1-3 Cleaning the Filters
The projector uses two filters to keep the fans free of dust and other particles, and should be cleaned every
500 hours of operation. In dustier environments, it is recommended to clean the filters more frequently. If
the filter is dirty or clogged, your projector may overheat. When the message below is displayed the filters
must be cleaned.
Note:
When the Please clean filter message is displayed, please clean or replace all two filters at the same
time to synchronize the hours used display.
The Filter Message item should be enabled in the Options menu.
SAFETY PRECAUTIONS
Please clean filter.
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