Christie M Series Service Manual page 19

4. To loosen the three setscrews (B) on the lens mount, use a 5 mm hex driver.
The setscrews must be backed out several turns to avoid contact with the inner lens mount
plate.
5. To fine tune the focus of cross-hair pattern I, adjust the appropriate adjustment screw (A)
until the cross-hair image is in focus with minimal flare.
6. To fine tune cross-hair pattern II, adjust the appropriate adjustment screw until the cross-hair
image is in focus with minimal flare.
7. To fine tune cross-hair pattern III, adjust the appropriate adjustment screw until the cross-
hair image is in focus with minimal flare.
8. Repeat step 5 to 7 as required until all three cross-hair patterns are in equal sharp focus.
• If the boresight is acceptable, proceed with step 11.
• If the boresight does not appear to be converging to an acceptable level of image quality,
or if the lens does not focus over the correct range of throw distances, proceed with step
9.
M Series Service Guide
020-100551-11 Rev. 1 (01-2019)
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Service setups
19