Digital Light Processing (DLP) projectors provide 1080p resolution for home theatres and business presentations. These projectors are equipped with air intake filters designed to trap dust. However, occasionally dust can slip through the filter, and you'll need to clean out the dust blobs inside a DLP projector. If left uncleaned, dust can clog the exhaust fan, leading to poor performance and possible overheating.
Remove the air intake filters on your DLP projector. As explained by InFocus, a manufacturer of LCD and DLP projectors, each DLP model will house the air filters in a different location. However, for most DLP projector products, the filters are accessible by unclipping a simple plastic latch.
Wipe the air filters with a small cloth dipped in rubbing alcohol.
Blow compressed air into the unit's vents. This will force some internal dust out of the DLP projector, but you may still need to open up the unit for additional dust removal.
Unsnap the main cover from your DLP projector. Because DLP projectors need periodic lamp replacement, the main cover is rarely secured with screws or bolts. However, if the DLP projector's cover does not snap off, then you'll want to inspect the unit for possible screws or an alternate release latch.
Reach in and remove visible dust globs with a paper towel. Be careful to avoid touching the lens, as fingerprint smudges can diminish DLP projector image quality. If you accidentally smudge the lens while picking out dust blobs, wipe the lens with a dry, lint-free microfiber cloth.
Spray compressed air into your DLP projector to remove any lingering dust particles.
Close up the projector and reattach the filters.