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NVS 6
MANUAL
Page 42
Trouble
and
symptoms
Probable
cause
Remedy
Remarks
2 Image of
viewed objects is
not sufficiently
sharp
1 Dirt on
external
surfaces of
the unit lens,
eyepiece
1 Wipe clean
external surfaces of
lens (1) (Ref. Fig. 5.1)
and eyepiece (2)
with cloth (11) (Ref.
Fig. 3.1) included in
the single set of
spare parts
Can be
performed in
the field
2 Unit is out
of focus
(dioptric
setting of
eyepieces has
not been
performed,
lenses have
not been
focused)
1 Adjust properly
sharpness of image
by rotating eyepiece
(2) (Ref. Fig. 5.1)
with the aid of
adjustment ring (3).
2 Bring the image
viewed in lenses (1)
(Ref. Fig. 5.1) into
sharp focus as
instructed in Step
7.4
Can be
performed in
the field
3 Lens or
eyepiece is af-
fected by phy-
1 Forward
the unit for
repair
To be
performed at a
repair shop or