ViewSonic PJ1158 PJ1158-1 User Guide, English - Page 100

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 your dealer and tell the air filter type number. Cleaning the air filter 1. Turn the projector off, and unplug the power cord. Allow the projector to sufficiently cool down. 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. 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. 8. Put the filter unit back into the projector. The front side of the projector The filter cover The filter cover knobs The filter unit The filter frame knob The filter frame The air filter The filter cover The fluted surface of the air filter (continued on next page) ViewSonic PJ1158 95