Ricoh KW5708, Обучение по обслуживанию

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Slide 50
Terms and Definitions - 3

Air Filter

Air is drawn into the projector to cool its internal
components. The air filter prevents dust from being pulled
into the projector with this air. If the filter becomes dirty, air
cannot pass through properly, and it will become hot inside
the projector.

Every 100 hours, a message will appear, asking the user to
clean the air filter.

Do not operate the projector without the filter.

The message will appear the first time the user switches the
power on after the 100-hour limit has been reached. The
message will stay on-screen for 30 seconds, or until the
user operates the projector.

Brightness and Focus of Outer Parts of the Projected
Image

Generally, when an image is projected, there are
differences between the center of the image and the outer
parts. The center is typically brighter than the outer parts.
The focus can be better or worse at the center than at the
edges.