Adjusting Dmd Convergence - Christie CP4315-RGB User Manual

12. If the bottom comes into focus first, use a 5 mm driver to turn the vertical boresight
adjustment screw (D) counterclockwise until the top and bottom are equally out of focus.
If the top comes into focus first, turn the vertical boresight screw clockwise.
13. Repeat steps 10 to 12 as required to obtain an even focus at the top and bottom of the screen.
14. Once the correct focus has been achieved, lock the three lock screws.
When locking the lock screws, start with the horizontal lock screws (Lock A and Lock B) and
turn them until they just touch the base. Repeat for the vertical lock screw (Lock C). Continue
the gradual tightening of each screw, until all lock screws are tight.
When stabilizing image vibration, Lock B may be left locked or unlocked at the discretion of the
installer.
15. If you used the focus knob (F) to make the adjustments manually, run an ILS auto calibration.
16. Fine tune the focus on cross-hair patterns I (horizontal) and II (vertical) using the ILS
controls only.
The goal is to obtain good focus at the center and on all sides of the screen, including the
square patterns across the screen.

Adjusting DMD convergence

A convergence problem can be identified when one or more projected colors (red, green, and blue)
appears misaligned when examined with a convergence test pattern.
The three colors should overlap to form pure white lines throughout the image and one or more poorly
converged individual colors may appear adjacent to some or all of the lines.
When adjusting the convergence, you are adjusting red and green to blue.
If you wear glasses with corrective lenses when performing this adjustment, ensure that 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.
1. Before adjusting DMD convergence, ensure the projector has reached a steady operational
state. If switching from a white or bright test pattern to a dark convergence test pattern, or if
warming up the projector after a shutdown, allow 15 minutes for stabilization so that the
optics can reach a steady state.
2. In the right toolbar, select Test Patterns.
3. Select the RGB-4K-Convergence test pattern and display it full screen.
Cinema 4K-RGB User Guide–CP4315-RGB, CP4320-RGB, CP4325-RGB, CP4330-RGB
020-102712-06 Rev. 1 (03-2021)
Copyright © 2021 Christie Digital Systems USA, Inc. All rights reserved.
Adjusting the image
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