Found website easy to use and manual very clear. First class service
Text excerpt from page 22 (click to view)
CP-SX5500W
Air Filter Replacing the Air Filter
Replace the air filter if contamination cannot be removed, or if it is damaged. 1. Remove the filter lid. 2. Pull and remove the old filter from the filter box. 3. Insert the new filter to the filter box. Push left and right edges of the filter with fingers in order to fit the filter to the box properly. Check that there is no gap between the filter and plastics at top, left and right side edge of the filter. 4. Set the filter lid.
CP-SX5500 Filter box
Filter Lid
Filter
Please clean with a vacuum cleaner.
Cleaning the air Filter
The air filter should be cleaned as described below at intervals of approximately 300 hours. 1. Switch the projector power supply OFF, and remove the power cord from the power outlet. 2. Clean the air filter with a vacuum cleaner. Option Air filter: MN03701 CAUTION Switch power OFF and remove the power cord from the power outlet before beginning maintenance work. Please read the separate �SAFETY INSTRUCTIONS� thoroughly to ensure that maintenance is performed correctly. Replace the air filter if contamination cannot be removed, or if it is damaged. Contact your dealer in such case. Do not use the equipment with the air filter removed. When the air filter is clogged with dust etc. the power supply is switched OFF automatically to prevent the temperature rising inside the projector.
