User`s guide

Clarity Visual Systems
October 1998
48
lamp access cover
remove the screen first.
To gain access to the filter from the rear of the VideoWall,
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 VideoWall.
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.
Cleaning the Screen
The screen’s lenticular pattern is sensitive to smudges and scratches.
To clean smudges from the screen, use a soft cloth and a non-
abrasive, non-hydrocarbon cleaner. Wipe the screen from top to
bottom, in the same direction that the lenticular runs.
Cleaning the Mirrors
The WN-5220-V’s optical mirrors can become dusty in normal
operation, particularly if the operating environment is dusty. When the
WN-5220-V is serviced, these mirrors may also accumulate accidental
smudges and fingerprints. Dust and smudges on the mirrors can
seriously degrade the WN-5220-V’s performance, so these should be
removed as soon as possible.
Because the mirrors are front surface mirrors and the lens is coated,
use care when attempting to clean them. They are easily scratched if
improperly cleaned. Use an inert dry dusting gas or dry, filtered
compressed air to remove dust from the mirrors. To remove smudges,
use an optical quality liquid cleaner and a disposable commercial lens
tissue. If the liquid is not a spray, apply it to the tissue first.