3-12. PNVS NSA REMOVAL FROM NIGHTSIDE TEST BENCH. (CONT)
Do not touch surface of elevation mirror when checking position of
mirror. Anything on your hands that gets on mirror surface will cause an
unwanted cleaning task. Cleaning too often will wear away coating on
Elevation mirror must be at its highest point to prevent damage to it
when installing PNVS shroud assembly.
Do not touch any of the mirror assembly steel bands. The bands might
bend or stretch and cause poor operation.
Use care when installing PNVS shroud assembly so that you do not
scratch coating on mirror.
(1) Inspect all exposed optic components for contamination. Refer to TM 1-5855-265-20 for
optics cleaning instructions.
(2) On PNVS NSA, position elevation mirror (1, figure 3-23) at its upper limit of travel by applying
upward pressure on elevation mirror support (2).
(3) Locate white vertical line or groove (3) in line with PNVS NSA alinement pin (4) on NSA rim
Figure 3-23. Mirror and Vertical Line or Groove Locations