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lOCATION ITEM
ITEM
TO CheCK/SeR-
NO.
VICE
Battery adapter
4
/ Compartment
Diopter adjust-
5
ment ring
6
eyecup
objective lens
7
Focus ring
8
lens Cap
9
Viewed Image
10
Strap, pads
pROCEdURE
Check to make sure battery
adapter is present. remove
battery adapter and inspect
for corrosion, moisture, cor-
roded or defective contacts,
and that o-ring is present.
rotate diopter adjust-
ment ring to make sure the
eyepiece is not too tight or
too loose.
Inspect for dirt, dust, and
cracked or torn cup. Inspect
for bent, broken or improperly
fitting eyecup. If necessary,
clean with water.
rotate objective lens focus
ring to ensure free move-
ment.
Inspect for cracked, torn, or
missing lens cap.
refer to Section V – opera-
tion Defects – to inspect for
operational defects.
Inspect for cuts, tears, fraying,
holes, cracks, or defective
fasteners.
NOT FUNCTION-
INg AT OpTIMAl
lEVEl IF
adapter is mis-
sing, contacts
damaged or cor-
roded, or o-ring
is missing.
Binding, not
moving freely or
too loose.
Binding or not
moving freely.
Flickering,
flashing, edge
glow, or shading
is observed.
Damage causes
straps or pads
to be unservice-
able.
6-3
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