Chapter 8 Troubleshooting Tables
1 Optical
79
8
Immersion oil found on dry type
objective (especially 40x objective).
Clean the objective. (P.63)
Aperture diaphragm and field diaphragm
opened or closed too far.
Close or open properly. (P.59, 60)
Image dark on one side.
Causes Corrective Measures
Revolving nosepiece not in click-stop
position.
Revolve to click-stop position.
Specimen rises from stage surface.
Stabilize it using the holder.
Image shifts during focus.
Causes Corrective Measures
Revolving nosepiece not in click-stop
position.
Revolve to click-stop position.
Specimen rises from stage surface.
Stabilize it using the holder.
Field diaphragm not centered (if the
microscope is equipped with a field
diaphragm)
Center the field diaphragm. (P.57)
Field lens unit not installed correctly.
Install correctly. (P.72)
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