Cleaning The Reflector - Christie CP2420-Xe Service Manual

b) Inspect the input end of the lens with a bright light and verify no streaks appear.
c) If streaks are present, repeat step a.
7. Re-install the lens.
8. To clean the output end of the projection lens, press the trigger of the Techspray canister
rapidly three times, 152.4 mm (6 inches) above the surface of the lens.
You must hold the Techspray canister vertically. Holding the canister at an angle can release
liquid refrigerant and contaminate the projector optics.
9. If the output end of the lens still appears dirty:
a) Dampen a clean, folded lint free cloth with acetone and wipe the surface of the output end
of the lens carefully with the smooth portion of the cloth that has no folds or creases.
b) Inspect the output end of the lens with a bright light and verify no streaks appear.
c) If streaks are present, repeat step a.
10. Re-assemble the projector and connect it to AC power.

Cleaning the reflector

Clean the reflector with care. The reflector is fragile and is easily damaged.
The reflector must be cleaned with isopropyl alcohol, ACS Reagent Grade 99.9%. Other solvents can
damage the reflective coating on the reflector. If you do not have additive-free compressed air, use an
air bulb or a camel hair brush to remove the debris. If you have questions about the cleaning
methodology, contact Christie Technical Support.
1. Prepare the projector for service.
a) Turn the lamp and projector off.
b) Allow the projector to cool for a minimum of 15 minutes.
c) Disconnect the projector from AC power.
2. Remove the lamp (on page 39).
3. Remove the reflector (on page 84).
4. Put on a pair of powder-free latex gloves.
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 optical component and press
the trigger rapidly three times to clear any possible impurities from the tube.
6. To clean the reflector, press the trigger of the canister rapidly multiple 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.
7. If the reflector still appears dirty:
a) Fold a lint free cloth and wipe the remaining dust particles off the inside of the reflector
with the smooth portion of the cloth that has no folds or creases.
Do not apply pressure with your fingers. Instead, use only the tension in the folded cloth
to remove the dust.
b) If significant dust remains on the reflector surface, dampen a clean lint free cloth with
isopropyl alcohol and wipe the surface carefully.
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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