Nikon Eclipse LV100POL Instructions Manual page 59

Problem
Dirt or dust is seen in
the viewfield.
Diascopic
microscopy
The viewing is poor (too
much or too little
contrast, or poor
resolution).
Diascopic
microscopy
The focus is uneven.
The image is elongated.
Diascopic
microscopy
The image is tinged
yellow.
The image is too bright.
Cause
The aperture diaphragm is stopped
down too far.
Dirt or dust exists on the lens, eyepiece,
filter, or specimen.
The upper surface of the condenser is
not clean.
The condenser position is too low.
Dirt or dust exists on the lens, eyepiece,
filter, or specimen.
The used objective is not suitable for
the microscopy.
The aperture diaphragm is stopped
down too far.
The condenser position is too low.
The nosepiece is not attached correctly.
The nosepiece is not set to a click-stop
position. (The objective is not placed in
the optical path).
The specimen holer is slanted.
The nosepiece is not attached correctly.
The nosepiece is not set to a clickstop
position.
The stage is tilting.
The microscope is not installed on a flat
surface.
The condenser has not been centered.
The NCB11 filter is not used.
The lamp voltage is too low.
The lamp voltage is too high.
V. Troubleshooting
Countermeasure
Open the diaphragm to a suitable size.
(p. 31 and 44)
Clean the components.
Clean the components.
Adjust the condenser focus knob so that
the field diaphragm image is focused on
the specimen surface.
Clean the components.
Use the designated objective.
Open the diaphragm to a suitable size.
(P.31 and 44)
Adjust the condenser focus knob so that
the field diaphragm image is focused on
the specimen surface.
Install the nosepiece correctly.
Rotage the nosepiece to a click-stop
position.
Install the specimen holder correctly.
Install the nosepiece correctly.
Rotage the nosepiece to a click-stop
position.
Install the stage correctly.
Install the microscope on a flat and
level surface.
Center the condenser.
Locate the NCB 11 filter into the
optical path.
Rotate the brightness control knob to
increase the intensity of the light source
and adjust the brightness with ND
filters. (P.23 and 24)
Adjust the brightness with the
brightness control knob. Or, locate a
ND filter into the optical path.
(P.23 and 24)
(p. 61)
(p. 61)
(P.30)
(P.61)
(P.49)
(P.30)
(P.49)
(P.49)
(P.48)
(P.30)
(P.24)
57