35
Troubleshooting Tables
1
If difficulties should be encountered in the course of operation, please recheck the symptoms,
referring to the tables below, before contacting your nearest Nikon representative.
Optical
Troubles Causes Corrective Measures
Darkness at the periphery,
no viewfield seen, or
uneven viewfield
brightness.
Revolving nosepiece not in
click-stop position (objective
not centered in the optical
path).
Revolve to click-stop position
(swing the objective correctly
into the optical path).
Condenser position too low. Position the condenser slightly
lower than the upper limit.
(P. 19)
Condenser not installed
correctly.
Install correctly. (P. 28)
Field lens unit not installed
correctly.
Install correctly. (P. 31)
Lamp not installed correctly. Install correctly. (P. 31)
Dirt or dust on the lens
(condenser, objective, field
lens, eyepiece, specimen).
Clean the lens. (P. 40)
Optical-path selection lever in
the intermediate position (on
trinocular eyepiece tube).
Optical-path selection lever not
set to binocular 100%.
Properly set to binocular 100%.
(P. 24)
Dirt or dust in the
viewfield.
Condenser position too low or
too high.
Position the condenser slightly
lower than the upper limit.
(P. 19)
Aperture diaphragm closed too
far.
Open properly. (P. 20)
Dirt or dust on the lens
(condenser, objective, field
lens, eyepiece, specimen).
Clean the lens. (P. 40)
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