User`s guide

Clarity Visual Systems
November 1998
60
Air Filter
Length of time between air filter replacements depends on the
environment in which the display is operated. Air filter cleanliness
should be periodically checked and the air filter replaced when dirty, at
a minimum of every 3,000 hours of operation. An excessively dirty air
filter can block air flow to the optical assembly and cause excessive
heat buildup inside the display. The air filter is most easily accessed
from the rear of the display by first removing the lamp access cover.
CAUTION
Use care when removing the air filter to avoid causing
accumulated dust to fall into the optical assembly.
1. Turn off the power
Switch off the WN-5220-S using the remote and allow the
cooling cycle to complete (3 minutes) before switching off
the AC power at the rear-panel switch.
2. Unplug power cord
Remove the AC power cord from the WN-5220-S.
3. Remove screen or
lamp access cover
To gain access to the filter from the front of the display,
remove the screen first.
To gain access to the filter from the rear of the display,
unfasten the 8 quarter-turn screws on the lamp access
cover and remove the cover.
4. Remove the filter
From the rear, pull the filter straight out.
From the front, pull the filter up and to the right. Gently
work the filter out of the display.
5. Remove residual
dust
Vacuum away any dust around the fan and filter supports.
6. Install new filter
Install a new filter with the arrow on the top edge up and
pointed toward the optical assembly (front of display).
7. Replace the screen
or lamp access
cover
8. Check for airflow
Switch on the unit and check for proper airflow by holding
a piece of paper near the airflow exhaust at the rear of the
unit.