Maintenance/replacement54 - ENGLISHMaintenanceMaintenance/replacementBefore cleaning/replacing the unitWhen you perform maintenance or replacement of the parts, make sure to turn off the power and disconnectzthe power plug from the wall outlet. (Æpages 28, 30)Be sure to observe the procedure “Powering off the projector” (z Æpage 30) when performing power supplyoperation.MaintenanceOuter CaseJWipe off dirt and dust using a soft dry cloth.If the dirt is persistent, soak the cloth with water and wring it thoroughly before wiping. Dry off the projectorzwith a dry cloth.Do not use benzene, thinner, or rubbing alcohol, other solvents, household cleaners. Using them mayzcause deterioration of the outer case.When using chemical treated dusters, follow its instruction.zFront glass surface of the lensJWipe off the dirt and dust off the front surface of the lens with soft clean cloth.Do not use a cloth that has an abrasive surface or a cloth that is moist, oily, or covered with dust.zDo not use excessive force when wiping the lens as it is fragile.zAttentionThe lens are made of glass. Impacts or excessive force when wiping may scratch its surface.zPlease handle with care.Air filtersJIf too much dust accumulates in the air filter, the internal temperature of the projector can not be maintained atthe normal level. Clean the filters after every 500 hours of usage.When the Dust Filter Reminder message is displayed.zWhen indicator lights in red and then the projector is turned off automatically.zTurn off the projector, and remove the AC power plug from the AC outlet.1 )Clean up the dust on the projector and around the air vents.2 )Pull out the air filters straight and slowly with grabbing the knobs.3 )KnobKnobAir filter (shorter filter with3 rows of intake vents)Air filter (longer filter with5 rows of intake vents)ProtrusionProtrusionClean the air filters.4 ) Vacuum dirt and dust from the air filters.z