InFocus LP770, User Manual

Page: 36 / 61

29
MAINTENANCE & TROUBLESHOOTING
This section describes how to:
•
clean the lens
•
clean the air filters
•
replace the projection lamp
•
replace the batteries in the remote
•
use the Kensington lock feature
•
troubleshoot the projector
Cleaning the Lens
Follow these steps to clean the projection lens:
1
Apply a non-abrasive camera lens cleaner to a soft, dry cloth.
•
Avoid using an excessive amount of cleaner.
•
Abrasive cleaners, solvents or other harsh chemicals might
scratch the lens.
2
Lightly wipe the cleaning cloth over the lens in a circular
motion.
3
If you don’t intend to use the projector immediately, replace
the lens cap.
Cleaning the Air Filters
NOTE: Replacement filters are
available from InFocus. See page
page 40 for ordering information.
The projector has two air filters, located on the bottom of the pro-
jector, that prevent dust and particles in the air from entering the
projector. The larger filter is flexible mesh, the smaller one is rigid
metal mesh.
If the filters becomes clogged, the projector does not cool prop-
erly and may malfunction. To prevent this, clean the filters after
every 100 hours of use. Note that the filters are cleaned differ-
ently.
1
Turn off the power and unplug the power cord.