31 August 1989
1.2 Sixth Mirror Replacement
1. Remove the exposure glass. (Refer to "Exposure Glass Removal.")
2. Remove the lens housing cover [A] (4 screws). Then, shift the lens housing [B] fully to the
left and the 4th/5th mirror assembly [C] to the right.
3. Remove the sliding plate [D] (4 screws), and remove the plate springs [E] from both ends
of the sixth mirror (1 screw each).
5-2