XG-MB70X. Version 1.3 - Sharp Projector Handy Guide. Page 35

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After replacing the DMD, if shading is present on the screen as shown in
Figure 1, adjust the lighting area of the DMD by turning the adjustment screws
for the optical engine.
1. Loosen the fixing screw for the adjustment lever 1. Adjust the lighting area
by adjustment lever 2 and then tighten the fixing screw for the adjustment
lever 1.
2. If the lightening area cannot be adjusted after the above procedure, loosen
the fixing screw 3, adjust the area with adjustment screws 4 and 5, and then
tighten the fixing screw 3.