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Maintenance of common sense

Materials needed for projector dust cleaning and detailed dust removal operation process

1. Materials Preparation Electric screwdriver: Used to remove the screws on the projector body for higher efficiency.

Air blower: Cleans dust without leaving moisture (avoid blowing with your mouth).

Clean eyeglass cloth: Wipes the lens or body surface to prevent scratches.

2. Necessity of Dust Cleaning (Taking BenQ Projector as an Example)

Spots on the screen are usually caused by dust accumulation on the DMD chip.

Cleaning dust in time can fix the spot issue and restore screen quality.

Long-term neglect will lead to DMD chip failure, and the cost of replacing the chip later will be much higher.

3. Simplified Operation Process (Taking BenQ Projector as an Example)

Taking BenQ projectors as an example, first remove the screws.


Then open the projector's cover and gently take out the bulb.




Vintage bulb projectors are actually quite easy to disassemble—just unscrew the bottom screws, and you can take off the outer shell. This also makes it convenient for everyone to clean the dust by themselves.



The overall internal structure:



There are also small parts around the interface, which can be easily removed.




Take off the protective cover—you can actually see the mainboard of the entire projector now.



Most BenQ projectors are equipped with a board that secures the mainboard, and we need to remove it.





Power module



Remove the projector lens




The lens is mounted on these three screw holes.



Unscrewing the lens makes it easier to clean and protect.



Dust on the surface of the DMD chip




Clean with an air blower (prefer a pressure-type one, avoid spray-type), ensure the optical components are completely dust-free after cleaning, then carefully screw the lens back on.Since you’ve already disassembled this far, it’s recommended to clean the color wheel as well: just remove the two fixing screws—there’s no need to take the color wheel fully apart.


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