Table of Contents
Advertisement
TABLE 4-2. TROUBLESHOOTING PROCEDURES
PROBLEM
Cannot achieve
the sharp image
of the object.
Cannot achieve
the sharp image
of the object
PROBABLE CAUSE
objective and output
lenses dirty.
Dr iving ring rotates
while thread ed r ing
does not move (Figure
4-1).
Damaged optical com-
ponents.
F o c u s r i n g a b l e t o
move along the sight
b o d y. l o c k i n g r i n g
loose (Figure 4-1).
CORRECTIVE ACTION
Clean thoroughly the lenses
surfaces.
1. Using hex wrench tighten
M3x6 screw which secures
driving ring on threaded
ring.
2. Point the sight to an ob-
ject situated at a distance
more than 100 m from you.
rotate focus ring to achieve
sharp image of the object.
3. loosen the M3x6 screw
and turn the driving ring
counter-clockwise to obtain
a gap under driving ring
lug equal to the thickness
of your thumb. (The gap is
indicated with arrow, Figure
4-1).
4. Tighten the M3x6 screw.
Send the sight to the ser-
vice center.
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 /counterclock-
wise.
repeat the steps 1-3 three
times.
4. remove
the
M 2 . 5x4 , a p p l y a s m a l l
amount of thread locker on
threads, install the screws
and tighten.
screws
4-7
Advertisement
Table of Contents
