NEC NP-P501X User's Manual - Page 168

7. Maintenance This section describes the simple maintenance procedures you should follow to clean the filters, the lens, the cabinet, and to replace the lamp and the filters. ❶ Cleaning the Filters The air-filter sponge keeps dust and dirt from getting inside the projector and should be frequently cleaned. If the filter is dirty or clogged, your projector may overheat. NOTE: The message for filter cleaning will be displayed for one minute after the projector is turned on or off. When the message is displayed, clean the filters. The time to clean the filters is set to [OFF] at time of shipment. To cancel the message, press any button on the projector cabinet or the remote control. The two-layer filter on the projector improves cooling and dust-proof capabilities compared with the conventional models. The outsides (intake side) of the first and second layer filters remove dust. To clean the filter, detach the filter unit and the filter cover. CAUTION • Before cleaning the filters, turn off the projector, disconnect the power cord and then allow the cabinet to cool. Failure to do so can result in electric shock or burn injuries. 1. Push up the buttons on the left and right to release the filter unit and pull it out. 2. Remove the filter unit by pulling out the tab. Filter cover 3. Remove the four filters. (1)Turn the filter unit over and pull out the two soft accordion filters (large and small). Filter unit 156