Product data

Clarity Visual Systems
September 1997
22
The optical engine must have access from the rear of the display for full servicing. The LCD
assembly has two vertical adjustment screws that can only be adjusted with the Lamp Access
Cover removed. Without access to these two screws, it may not be possible to properly
position an image on the screen.
1. Turn the lamp off
Switch off the WN-5220-V using the remote and allow the cooling
cycle to complete (3 – 4 minutes) before switching off the AC power
at the rear-panel switch
2. Remove power cord
Remove the AC power cord from the WN-5220-V
3. Remove the Lamp Access
Cover and air filter
Unfasten the 8 quarter-turn screws on the lamp access cover and
remove the cover
4. Remove the lamp
5. Remove the depixelation
filter to prevent it from
being scratched
Note its rotational orientation in retaining clips on the front of the
projection lens and remove the depixelation filter (it must be
reinstalled with the same rotational orientation, so mark the top edge
with a marking pen if not already marked).
6. Remove the high voltage
lamp connector
Remove the two screws from the high-voltage connector retaining
plate. These are located on either side of where the lamp connector
plugs into the Optical Engine. Withdraw the high-voltage cable
from the optical engine by pulling it down and out.
7. Disconnect the two LCD fan
connectors
The fan connectors are located next to the air filter. Pull on the
connector, not on the wires.
8. Disconnect the lamp fan and
reflector fan connectors
The fan connectors are located beneath the lamp and reflector fan
area. One connector goes to the Lamp Fan and the other goes to the
Reflector Fan. Pull on the connector, not on the wires.
9. Disconnect cable from the
thermal switch
The two bayonet connectors attach to the thermostat on the side of
the Optical Engine where the lamp latches are.
10. Remove the LCD cable
Lifting the tabs on each edge of the connector, remove the LCD
ribbon cable from it’s connector on the Optical Engine (note
conductor orientation on the cable for reinstallation – they should be
facing the direction of the lamp).
11. Loosen the two nuts at the
front of the Optical
Engine base flange
Loosen several turns, but do not remove, the two self-locking nuts
holding the front base flange of the Optical Engine to the chassis of
the VideoWall. These are located between the Optical Engine and
the step in the display’s chassis.
12. Remove the one nut from
the rear of the Optical
Engine base flange
The nut is located on the base flange between the air filter and the
Electronics Module.
13. Remove the Optical
Engine
Lift and pull the Optical Engine out of the chassis.
∇
CAUTION
Make sure that the Lamp and Reflector fans get reconnected and are operating. Failure
to do so can lead to overheating of the lamp, resulting in a ruined lamp.