Follow these steps:

1.Turn off the projector and unplug the power cord.

2.Grip the air filter cover tab and remove the air filter cover as shown.

3.Place your finger into the groove and remove the air filter as shown.

4.With the front of the air filter facing down, tap it four or five times to shake off the dust. Turn it over and tap the other side in the same way to shake off the dust.

Maintaining the Projector 123