R5906151 /02 XDL 1274. Attach the clean dust filters to the inner side of the front cover door. Ensure that both latches and bothmounting lips (reference 1 and 2 Image 11-2) of the dust filters are engaged.Caution: UNDER NO CIRCUMSTANCES SHOULD WET FILTERS BE INSTALLED BACK INTO THEPROJECTOR. THIS CAN HAVE SERIOUS SAFETY CONSEQUENCES AS WELL AS JEOPARDIZEINTERNAL COMPONENTS OF THE SYSTEM.5. Reinstall the small side panel (if removed, see Image 11-1) and close the front cover door.The dust filter is cleanable. See cleaning procedure for correct cleaning and drying instructions.11.2 Vacuum cleaning of the dust filtersWhen to vacuum the dust filters?The dust filters of the projector should be checked every month. If the filters are contaminated with dust thencleaning the filters with a vacuum cleaner should be sufficient. In case the filters feel greasy these must bewashed. See cleaning procedure “Washing and drying the dust filters”, page 128.This procedure assumes that the dust filters are removed from the projector.Required toolsVacuum cleaner with soft brush suction nozzle.How to vacuum-clean the dust filter?1. Carefully vacuum the air inlet side of the dust filter. Use a vacuum cleaner with a soft brush suction nozzle.The air inlet side of the dust filter is the side which is surrounded with a glue edge.Tip: Lightly tap the filter on its dusty side to expel heavy dust contamination.Tip: Compressed air is also permitted to clean the filters but take care not to damage them.Caution: Do not use compressed air inside the booth area. Bring the dust filters outside the building toblow off the dust.Caution: Do not damage the dust filter. Replace damaged dust filters immediately.11.3 Vacuum cleaning of the dust filtersWhen to vacuum clean the dust filters?The dust filters of the projector should be checked every month. If the filters are contaminated with dust thencleaning the filters with a vacuum cleaner should be sufficient. In case the filters feel greasy these must bewashed. See cleaning procedure “Vacuum cleaning of the dust filters”, page 127.Grease on the filter can build up after several months in an environment contaminated with greasyair. Note that areas where popcorn is consumed are subject to greasy air.This procedure assumes that the dust filters are removed from the projector.Maintenance procedures