Adjusting Dmd Convergence - Christie Griffyn 4K32-RGB Installation And Setup Manual

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.
Two features can be used independently or in conjunction to adjust convergence: electronic (with the
remote or through the menu) and/or mechanical.
When adjusting the convergence, you are adjusting red and green to blue for mechanical
convergence. 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). 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.
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.
Mechanically adjusting convergence
Use the convergence knobs behind the Service door to mechanically adjust convergence.
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. Ensure electronic convergence has been reset to zero prior to conducting mechanical
convergence.
3. From the Test Pattern menu, select the RGB-4K-Convergence test pattern and display it full
screen.
Griffyn 4K32-RGB Installation and Setup Guide
020-103314-05 Rev. 1 (04-2021)
Copyright © 2021 Christie Digital Systems USA, Inc. All rights reserved.
Installation and setup
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