Epson EMP-70 Instruction Manual page 69

Cleaning the Air Intake Vents
Accumulated dust in the air intake vents degrades ventilation, increases the
interior temperature, and can cause malfunction.
To prevent debris from entering the air intake vents, always stand the projector
upright with the lens upward. Then use a vacuum cleaner or other equipment to
suck dust from the vents.
Point:
If it is no longer possible to remove the dirt from the air intake vent, it is time to
replace it. Consult your vendor.
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