ViewSonic PJ1173 PJ1173 User Guide, English - Page 110

Maintenance Air filter Please check and clean the air filter periodically. If the air filter becomes clogged by dust or the like, internal temperatures rise, which could cause a fire, a burn or malfunction to the projector. When the indicators or a message prompts you to clean the air filter, comply with it as soon as possible. Note that the projector may shut down, when the projector heats too much. Please replace the air filter when it is damaged or too soiled. Preparation of a new air filter is recommended. To prepare a new air filter, contact with ViewSonic and tell the air filter type number. Cleaning the air filter The front side of the projector 1. Turn the projector off, and unplug the power cord. Allow the projector to sufficiently cool down. The filter cover 2. Use a vacuum cleaner on and around the filter cover. 3. Hold the filter cover knobs while lifting it. The filter unit made up the filter cover and others will come off. 4. Use a vacuum cleaner for the filter vent of the projector and the filter frame side of the filter unit. If the air filter is damaged or too soiled, replace it according to the following procedure number 5 to 7. Otherwise, please jump to the procedure number 8. 5. To remove the filter frame, hold the filter cover while holding and pulling the filter frame's knob by another hand. The filter cover knobs The filter unit The filter frame knob The filter frame The air filter 6. Replace the air filter with new one. It is recommended that the fluted surface of the air filter faces the filter cover. 7. Put the filter frame back. The fluted surface of the air filter 8. Put the filter unit back into the projector. The filter cover (Continued on next page) ViewSonic 105 PJ1173