A warning message like the one pictured to the right will be displayed for 10 seconds every 500 hours of use to remind you to clean the filter. To leave the message, press ENTER on the projector or remote control.
Clean the Air Filter
The air filter should be cleaned every 500 hours of use.
If you have not done so, please clean or replace the filter.
To clean the filter
OK
1.Turn the projector off and wait until the fans stop running.
2.Locate the filter case on the back of the projector.
Filter case 
3.Release the filter case from the projector by
pressing the filter case into the slot slightly. The filter case springs out of the slot.
4.Pull out the filter case.
5.Use a small vacuum cleaner designed for
computers and other office equipment to clean the filter sponge. Or use a soft brush (such as a clean artist's paintbrush) to gently sweep the dust on the filter away.
If the dirt is difficult to remove or the filter is broken, replace it with the supplied spare filter sponge. See "Replacing the filter sponge" next page.
54 Maintenance