Canon D78-5232, Service Manual, Page: 29 / 130

2.5 Air Filter Care and Cleaning
The removable air filter prevents dust from accumulation on the surface of the
projection lens and projection mirror. Should the air filter become clogged with dust
particles, it will reduce the cooling fan's effectiveness and may result in internal heat
build up and reduce the life of the
projector.
To clean up the air filter, follow the
cleaning procedure below:
1. Turn the power off, and disconnect the
AC power cord from the AC outlet.
2. Turn the projector up side down and
remove the air filter by pulling its latches
upward.
3. Clean the air filter with a brush.
4. Replace the air filter properly. Make
sure that the air filter is fully inserted.
Part 2: Repair Information
2-4
Do not operate the projector with the air filter removed. It may result in
the malfunction of the projector.
We recommend to avoid dusty, smoky place for operating the projector.
The dust is stuck on the LCD panel and the mirror, and it may spoil the
fine picture image.
Using in dusty place may cause the picture of poor quality.
When using under the dusty or smoky conditions, dust may accumulate
on the LCD panel and lens inside it, and may resultantly be projected on
the screen together with the picture.
When the above symptoms are noticed, please clean up the LCD panel
and lens according to the "Cleaning Method".
CAUTION
Fig. 2-4
Air filter