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