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Section 3: Service Setups
3.1
Fold Mirror Alignment
When properly aligned, the fold mirror directs light
from the integrator fully and precisely onto the
DMD pixels. After moving or replacing the fold
mirror, check for consistent light over-spill around
the perimeter of a full white or black field—if the
shadows vary or disappear completely along any
edge or corner, the fold mirror is cropping light
from the DMDs and must be realigned. When
corrected, the shadows cast by the integrator edges
form an even perimeter around the full active
display area without interfering with the image and
all of the image is displayed.
1. Adjust the two screws located on the base of the
projector. (Figure 3-1)
2. To raise or lower the image, adjust the screw
closest to the operator side (right-side when
facing screen).
3. To move the image left or right, adjust the
screw furthest from the operator side.
3.2
Integrator Alignment
The integrator module is located early in the light path, between the UV filter and cold mirror. Its chief
component, the internal solid silica pipe, efficiently converts the initial round light beam supplied from the
lamp into a uniform rectangle that passes through the remainder of the optical system and eventually
illuminates the three DMDs at the opposite end of the light path. Therefore, whenever the integrator module is
moved or replaced, its end-to-end position, as well as its rotation must be correct for proper focus and full
illumination of the three DMDs.
1. Display a full white field.
2. Loosen integrator assembly so that it can be freely moved by hand.
3. Focusing: Corners should be equal in focus, although they may appear slightly blurry. As necessary, move
the integrator forward or backward along its axis for an equal level of focus in all corners. For best results,
double-check perimeter shadows with a full black field. (Figure 3-2)
3-2
UV goggles are required when operating the projector without covers.
Figure 3-2 Focusing the Integrator
Figure 3-1 Fold Mirror Alignment
D4K25 Service Manual
020-100880-01 Rev. 1 (06-2012)
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