Troubleshooting; Viewing Problems And Control Problems - Nikon Eclipse LV100DA-U Instructions Manual

Troubleshooting

Improper use of the microscope may adversely affect performance, even if the microscope is not damaged. If
any of the problems listed in the table below arise, take the countermeasures indicated.
1

Viewing Problems and Control Problems

Problem
The viewfield is
invisible, vignetted, or
uneven in brightness.
Episcopic
microscopy
Diascopic
microscopy
Cause
The lamp is not attached correctly.
The optical path selector lever on the
eyepiece tube is in an intermediate
position.
The optical path selector lever on the
eyepiece tube is not placed to the
position of 100% (or 20%) distribution
to the binocular part.
A filter is in an intermediate position.
The field diaphragm is stopped down
too far.
The nosepiece is not attached correctly.
The rotation of the nosepiece is stopped
at an incorrect position. (No objective is
placed in the optical path.)
The dummy slider, DIC slider, polarizer
slider, lambda plate slider, or analyzer
slider is in an intermediate position.
The filter cube turret in the LV-
UEPI2A is stopped at an intermediate
position.
No filter cube is attached in place. Or,
the filter cube is attached in a wrong
position.
The filter cube selection is incorrect.
The condenser position is too low.
The condenser is not centered.
The condenser is not attached correctly.
The condenser turret position of the
universal condenser is located in an
intermediate position.
The upper part of the polarizer is
stopped at an intermediate position.
Countermeasure
Install the lamp correctly. (p. 86 and 87)
Securely move the optical path selector
lever to the position where 100% (or
20%) light goes through the binocular
eyepiece.
Move the filter slider to a click-stop
position.
Open the diaphragm to a suitable size.
(p. 50 and 54)
Install the nosepiece correctly.
Push the OBJ. switch several times to
move the objective into the optical path.
Move the slider to a click-stop position.
(p. 56, 60, and 62 to 67)
Push the CUBE switch several times to
move the turret to the correct position.
Attach the filter cube to the correct
position.
Select an appropriate filter cube.
(p. 38, 68 to 70, and 84)
Adjust the condenser so that the field
diaphragm image is focused on the
specimen surface.
Center the condenser.
Install the condenser correctly.
Rotate it to the click-stop position.
Move the upper part to a click-stop
position.
(p. 48)
(p. 44)
(p. 79)
(p. 43)
(p. 37)
(p. 84)
(p. 53)
(p. 53)
(p. 78)
(p. 55)
(p. 59)
99