Cleaning The Light Engine Prism; Cleaning The Uv Filter - Christie CP2420-Xe Service Manual

• Use solvents only if dirt remains after dusting with compressed air.
• Do not reuse lens tissues. Use a clean tissue for each cleaning operation.
• Handle optics by their edges.
• When using Techspray 1671-10S, do not shake the can prior to use.

Cleaning the light engine prism

If the entire light engine requires cleaning, contact Christie Technical Support.
If you do not have additive-free compressed air, use an air bulb or a camel hair brush to remove dust
and 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 light engine (on page 96) and set it on a clean, lint-free cloth.
3. 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.
4. To clean the light engine prism, press the trigger of the Techspray canister rapidly three times,
152.4 (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.
5. If the prism still appears dirty:
a) Put on a pair of powder-free latex gloves.
b) Dampen a clean, folded, lint-free cloth with acetone and wipe the surface of the prism
carefully with the smooth portion of the cloth that has no folds or creases.
Do not apply pressure with your fingers. Use only the tension in the folded cloth.
c) Inspect the prism surface with a bright light and verify it is streak free.
d) If streaks are present, repeat step b.
6. Reassemble the light engine and the projector.
7. Connect the projector to AC power.

Cleaning the UV filter

Learn the steps for cleaning or replacing the projector UV filter.
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.
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.
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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