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Convergence Instruction Sheet
020-100703-01 Rev. 1 (05-2011)
c. Green and Blue should always be perfectly aligned to each-other (to within ¼ pixel total in one
or a combination of directions.)
Figure 10 Best Possible Convergence
2. In certain circumstances, there may be further tolerance deficiencies in the prism assembly in
combination with the projection lens that will cause the normal Red over-sizing to become slightly
non-uniform.
a. In practice, this extra increase in size has generally appeared on the lower-right of the image,
causing an apparent clockwise twist in the lower-right corner only – the upper left, right and
lower-left all look OK.
b. The only way to deal with this will be to “Split the difference” pushing the rest of the image
slightly twisted counter-clockwise to minimize the effect on the bottom of the screen, keeping
the subtitle zone as converged as possible.
c. If the problem appears to be more than an extra 1/2 of a pixel out of uniformity, a new lens/
prism assembly may be the only solution.
