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Problem
Cause
Countermeasure
The aperture diaphragm is stopped down
Open the diaphragm to a suitable sin:.
too far.
lp.231
Position the condenser so that the image
The condenser is too low.
of the field diaphragm forms
proper!~
on
the specimen.
\p.22l
The cover glass is too thick.
Use the specified type of cover glass
There is no cover glass.
(thickness: 0.17 mm).
There is no oil on the tip of an oil-
immersion type of objective.
Apply Nikon immersion oil.
\p.2.'il
The specified immersion oil is not being
used.
There are bubbles in th.:- immersion oil.
Remo\'e the
buhhl.:-~.
lp.251
Viewing is poor (too much
There is immersion oil on the tip of a dry
I
or too little contrast, poor
type of objective.
Clean the components.
lp.2.'i!
resolution).
The compensation ring on an objective
fitted with a compensation ring has not
Adjust the compensation ring according
been adjusted.
to the cover glass.
There is dirt or dust on the lens.
Clean the components.
(p.4.'i)
condenser. objective or specimen.
A specimen with a cover glass is being
Use an objective that allows observation
observed with an objective for observing
of specimens with a cover glass.
specimens without a cover glass.
A specimen without a cover glass is being
Use an objective for observing specimens
observed with an objective for observing
without a cover glass.
specimens covered with a cover glass.
Mark on
the objective
oo/O.J7:
For observing a specimen with
a cover glass
oo/O:
For observing a specimen
without a cover glass
oo/-:
For observing either specimen
with or without a cover glass
The revolving nosepiece has not been
Install the revolving nosepiece correctly.
installed properly.
(p.36)
Uneven focus.
The revolving nosepiece has not been
Tum the revolving nosepiece until it
rotated until it clicks into place.
clicks into place.
lp.12)
The specimen is not secured in place on
Install the specimen properly in the
the stage.
specimen clips on the stage.
The revolving nosepiece
ha~
not been
Install the revolving nosepiece correctly.
installed properly.
(p.36)
The revolving nosepiece has not been
Tum the revolving nosepiece until it
Image flows.
rotated until it clicks into place.
clicks into place.
(p.12)
The specimen is not secured in place on
Install the specimen properly in the
the stage.
specimen clips on the stage.
The condenser is not centered.
Center the condenser.
lp.22)
42
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