Preparation; Evaluating The Convergence - Christie CP2208 Service Manual

The projector uses three separate DMD panels to produce three separate red, green and blue image
components. To ensure the most accurate color representation across the whole image it is
essential the three panels are perfectly aligned so that all pixels line up. Read this section in its
entirety before performing a convergence adjustment.

Preparation

• Reset the red, green, and blue digital micromirror device (DMD) values to their default settings:
• Tap Menu > Service Setup > Digital Convergence > Default
• Make sure the projected image is centered and focused on the screen. If it is not, a boresight
alignment might be required. See
• Make sure a prime lens is installed. Do not use an anamorphic or Wide Converter Lens (WCL)
lens when adjusting convergence.
• Configure the projector for maximum usable brightness for the installed application:
• 14FL for Standard 2D
• ~25-30FL for Single Projector 3D with a silver screen
• 25FL per projector for Dual Projector 3D
• Allow the projector to operate for 15 minutes or longer.
• Monitor the prism temperature during the convergence adjustment and keep it within a few
degrees of the nominal temperature. Lower the lamp power to reduce the temperature.
• The active screen file should be 2048 x 1080 no crop to prevent any scaling of your reference
test pattern.
• Use a 2.5 mm driver with heat-shrink tubing (2.0 inch and 6.5 inch lengths).
• The red image component is used as the fixed reference; no adjustment is required. The
recommended convergence adjustments are from green to red and blue to green.
• Complete the vertical and rotation adjustment first and then the horizontal adjustment.

Evaluating the convergence

1. Display the DC2K Framing test pattern:
a. On the touch panel controller (TPC), tap the Test Pattern icon (
b. Tap All Test Patterns.
c. Tap DC2K Framing.
2. Turn the zoom adjustment ring on the lens until the entire outer edge of the test pattern frame
fits the screen.
3. Verify one color at a time.
Look for "twist" using the center vertical and horizontal lines – scan from one side of the screen to
the other, observing any change in vertical position of the color in question relative to the point
CP2208 Service Manual
020-101917-01 Rev. 1 (11-2015)
Adjusting the vertical boresight angle
Adjusting the Image
on page 16.
) in the task bar.
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