Canon 4K6021Z User Manual page 26

Before Installation
■ Precautions for Portrait (Upright) Installation
• Do not block the air intake or exhaust vents. In particular,
because there is an air intake vent on the bottom, always ensure
a minimum clearance of 2 cm (0.8") from the bottom.
• Note that no mounting brackets or similar accessories for
portrait installation are available.
■ Light Source
The projector uses laser as a light source. The laser has the following
characteristic.
Factors such as long-term use and environmental changes may
affect image quality. You can counteract changes in brightness
from hours of use or the ambient temperature by performing
[Light source calibration] in [Calibration] (P156).
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