Chapter 5 Maintenance — Maintenance/replacement164 - ENGLISHMaintenance/replacementBefore performing maintenance/replacementf Make sure to turn off the power before performing maintenance/replacement. (x pages 55, 61)f When switching off the projector, make sure to follow the procedures in “Switching off the projector”(x page 61).MaintenanceOuter caseWipe off dirt and dust with a soft, dry cloth.f If the dirt is persistent, soak the cloth with water and wring it thoroughly before wiping. Dry off the projector witha dry cloth.f Do not use benzene, thinner, or rubbing alcohol, other solvents, or household cleaners. Doing so maydeteriorate the outer case.f When using chemically treated dust cloths, follow the instructions written on its packaging.Lens front surfaceWipe off dirt and dust from the front surface of the lens with a soft clean cloth.f Do not use a cloth that is fluffy, dusty, or soaked with oil/water.f Since the lens is fragile, do not use excessive force when wiping the lens.Attentionf The lens is made of glass. Impacts or excessive force when wiping may scratch its surface. Handle with care.Air filterPerform maintenance of the air filter in the following case.f The air filter is clogged with dust, causing the filter replacement message to appear on the screen and the filterindicator to light in red.Removing the air filter(a)Lamp unit coverLamp unit cover fixing screwFig. 1Air filterFig. 2 Fig. 3Air filter caseAir filter1) Remove the lamp unit cover. (Fig. 1)f Use a Phillips screwdriver to turn the lamp unit cover fixing screw (x1) counterclockwise until it turns freely,and open the lamp unit cover slowly in the direction of the arrow.f Opening the lamp unit cover quickly may damage the cover.f If you loosen the lamp unit cover fixing screw with the projector installed upward in the vertical direction, thelamp unit cover may open on its weight and may be dropped off.2) Pull out the air filter case. (Fig. 2)f Pull out the air filter case from the projector.
