BOXLIGHT FP-97t - Manual (Page 53)

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The removable air filter prevents dust from accumulating on the surface of the projection lens and projection mirror. Should
the air filter become clogged with dust particles, it will reduce the cooling fan's effectiveness and may result in internal heat
build-up and reduce the life of the projector.
To clean the air filter, follow the cleaning procedures below:
1. Turn the POWER ON/OFF button OFF.
2. Remove the air filter cover.
3. Remove the air filter and sponge from the filter cover.
4. Clean the air filter with a vacuum cleaner.
5. Replace the air filter and sponge. Make sure that air filter cover is fully
inserted.
Do not clean with water. Doing so may damage the air filter.
Do not operate the projector with air filter removed.
RECOMMENDATION
TO ENJOY THE FINEST PICTURE IMAGE, USE THE PROJECTOR IN A CLEAN
ENVIRONMENT. USAGE IN A CLEAN ENVIRONMENT IS RECOMMENDED.
When used under dusty or smoky conditions, dust may accumulate on the liquid crystal
panel and lens inside it, and may resultantly be projected on the screen together with
the picture.
When the above symptoms are noticed, contact a Boxlight Corporation at 1-800-762-
5757 or 360-779-7901 for cleaning.
TEMPERATURE
WARNING
INDICATOR
AIR FILTER
COVER
AIR FILTER
SPONGE
AIR FILTER
COVER
The TEMPERATURE WARNING INDICATOR flashes red when the internal
temperature of the projector exceeds the normal temperature.
Possible causes for the temperature warning may be :
1. Ventilation slots of the projector are blocked. In such an event, reposition
the projector so that ventilation slots are not obstructed.
2. Air filter is clogged with dust particles. Remove dust from the air filter by
following instructions in the Air Filter Care and Cleaning section above.
3. If temperature warning indicator remains on after performing the checks
listed above, cooling fan/internal circuits may be malfunctioning. Request
service from an authorized dealer or service station.
APPENDIX
MAINTENANCE
TEMPERATURE WARNING INDICATOR
AIR FILTER CARE AND CLEANING