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PROBLEM
Cannot
achieve the
sharp image
of the object
Sight affects
boresight
after installa-
tion or dur-ing
the firing.
4-10
Table 4-2. Troubleshooting Procedures
PROBABLE CAUSE
Focus ring able
to move along the
sight body. Locking
ring loose (see
Figure 3-1).
Objective lens
loose.
Factory alignment
broken.
CORRECTIVE ACTION
(1) Loosen three screws
M2.5x4 more than a turn.
(2) Tighten the locking
ring and fix it with the
screws.
(3) Rotate focus ring
slightly clock-wise/coun-
terclockwise.
Repeat the steps 1-3
three times.
(4) Remove the screws
M2.5x4, apply a small
amount of thread locker
on threads, install the
screws and tighten.
Send the sight to the
service center.
Send the sight to the
service center.
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