M46 Microscope Troubleshooting:
14
Fein
TROUBLE
POSSIBLE CAUSE
SOLUTION
The bulb is bright but
it is dark in field of
view
Field diaphragm is not large enough.
Adjust the field diaphragm.
Polarizer or analyzer is in use.
Remove polarizer and analyzer.
The side of the field
of view is dark or not
even
The nosepiece is not in the right position.
Turn the nosepiece into position.
Stain or dust has accumulated on the lens
(objectives or eyepieces).
Clean the lens.
The color filter, polarizer, or analyzer is not in
the right position.
Insert them or move out of the
light path.
Bright and darkfield selecting pole is not in the
right position.
Pull it to the right position.
Beam splitter is not in the right position.
Pull it to the right position.
Stain or dust is
observed in the field
of view.
Stains have accumulated on the specimen.
Clean the specimen.
Stains have accumulated on the lens.
Clean the lens.
Unclear Image
The specimen is not vertical to the objective.
Adjust it.
The aperture is not opened correctly.
Adjust it.
Stain or dust has accumulated on the lens of
eyepiece.
Clean the lens.
Bright and darkfield selecting pole is not in the
right positions.
Pull it to the right position.
Beam splitter is not in the right position.
Pull it to the right position.
One side of the image
is dark or the image
moves while focusing.
The specimen slide is not fixed.
Fix it with clips.
The nosepiece is not in the right position.
Turn the nosepiece into the right
position.
The eyes feel tired
easily. The right
field of view doesn’t
superpose with the
left one.
Interpupillary distance is incorrect.
Adjust the interpupillary
distance.
Diopter adjustment is incorrect.
Adjust the diopter.
The eyepiece for the right eye is different from
the left one.
Use the same eyepieces.