7. To continue to refine the fold mirror adjustment, repeat the horizontal and vertical
adjustments.
8. Lock the fold mirror screw to lock the adjustment knobs.
9. Once satisfied with the alignment, increase the projector power.
Adjusting DMD convergence
A convergence problem occurs 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. From the Test Pattern menu, select the RGB-4K-Convergence test pattern and display it full
screen.
Installation and setup
4K40-RGB Installation and Setup Guide–D4K40-RGB, Roadie 4K40-RGB
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020-102961-03 Rev. 1 (08-2019)
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2019 Christie Digital Systems USA, Inc. All rights reserved.
