Electronically Adjusting Convergence - Christie CP2420-Xe Service Manual

6. Use the Convergence test pattern to assist with adjusting the horizontal and vertical lines.
Horizontal adjustments are controlled by adjusting knob 3.
Vertical convergence and rotation are controlled by adjusting knobs 1 and 2. Christie
recommends rotating a single knob a maximum of a quarter rotation before adjusting the
second knob a quarter rotation. For example, if using one hand, turn the left knob a quarter
rotation and then the right knob a quarter rotation, and so on. Adjusting a single knob for
vertical or rotational adjustment to an extreme before adjusting the second knob may result in
the convergence mechanism binding.
For the best stability, Christie recommends setting convergence while rotating the knobs in a
clockwise direction. This may require first adjusting convergence by turning the knobs counter-
clockwise and finalizing the convergence with a clockwise approach. This applies to all knobs.
7. When complete, push in all the convergence adjustment knobs to disengage them.

Electronically adjusting convergence

Use the electronic convergence feature in the menu to adjust convergence. Only perform electronic
convergence when satisfied with the position of the image on the screen.
Adjusting the convergence is accomplished by aligning a red, green and blue sprite, which is displayed
at the four corners of the displayed image. For electronic convergence all three colors can be adjusted.
Always align the color components of the sprite to the inner most line color (for each axis). When
converged, the three colors should overlap to form white lines. Applying the sprite alignment settings
to the screen results in the three colors overlapping to form white lines throughout the image.
One or more poorly converged individual colors may appear adjacent to some or all of the lines.
If you wear glasses with corrective lenses when performing this adjustment, ensure you are viewing the
test pattern on a straight angle through the optical axis of your glasses and not from a tilted or angled
perspective. This avoids a prismatic effect that can appear to shift convergence when viewing at an
angle.
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.
Service setups
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