Cleaning The Projection Lens - Christie CP2420-Xe Service Manual

2. Remove the lamp (on page 74).
3. Put on a pair of powder-free latex gloves.
4. Remove the UV filter (on page 86) and set on a clean, lint free cloth.
If the filter is yellow, replace it. When replacing the UV filter make sure the directional arrow
on the filter faces the reflector.
5. To prepare the Techspray 1671-10S canister for use, firmly attach the red output tube to the
output nozzle on the canister, point the canister away from the UV filter, and press the trigger
rapidly three times to clear any possible impurities from the tube.
6. To clean the UV filter, hold the filter by its edges and press the trigger of the Techspray canister
rapidly three times, 152.4 (6 inches) above the UV filter.
You must hold the Techspray canister vertically. Holding the canister at an angle can release
liquid refrigerant and contaminate the UV filter.
7. Turn the UV filter over and repeat step 6.
8. If the UV filter still appears dirty:
a) Place the filter on a clean and dry lint free cloth.
b) Dampen a clean, folded lint free cloth with acetone and wipe the surface carefully.
Do not apply pressure with your fingers. Use only the tension in the folded cloth.
c) Allow the solvent to dry.
d) Turn the UV filter over and repeat step b.
9. Reassemble the projector and connect it to AC power.

Cleaning the projection lens

Learn the steps for cleaning the input and output ends of the projection lens.
If you do not have additive-free compressed air, use an air bulb or a camel hair brush to remove dust
and debris. For any questions about the cleaning methodology, contact Christie Technical Support.
1. Prepare the projector for service.
a) Turn off the lamp and projector.
b) Allow the projector to cool for a minimum of 15 minutes.
c) Disconnect the projector from AC power.
2. Put on a pair of powder-free latex gloves.
3. Remove the projection lens from the projector (on page 43) and place it on a flat, stable
surface.
4. To prepare the Techspray 1671-10S canister for use, firmly attach the red output tube to the
output nozzle on the canister, point the canister away from the optical component, and press
the trigger rapidly three times to clear any possible impurities from the tube.
5. To clean the input end of the projection lens, press the trigger of the Techspray canister rapidly
three times, 152.4 mm (6 inches) above the optical component.
You must hold the Techspray canister vertically. Holding the canister at an angle can release
liquid refrigerant and contaminate the projector optics.
6. If the input end of the lens still appears dirty:
a) Dampen a clean, folded lint-free cloth with acetone and wipe the surface of the input end
of the lens carefully with the smooth portion of the cloth that has no folds or creases.
CP2420-Xe and CP4420-Xe Service Guide
020-103566-02 Rev. 1 (07-2022)
Copyright © 2022 Christie Digital Systems USA, Inc. All rights reserved.
If printed, please recycle this document after use.
Maintenance and cleaning
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