Chapter 8 Troubleshooting
1 Optical
40
Image dark on one side. (One side of the viewfield (up, down,
right, or left) is not focused.)
Causes Corrective Measures
Revolving nosepiece is not in click-stop
position.
Revolve to click-stop position.
Specimen rises from stage surface.
Stabilize it using the holder.
Image shifts during focus.
(Becomes asymmetrically defocused
when moving the focal point.)
Causes Corrective Measures
Revolving nosepiece is not in click-stop
position.
Revolve to click-stop position.
Specimen rises from stage surface.
Stabilize it using the holder.
Field diaphragm is not centered (if the
microscope is equipped with a field
diaphragm)
Center the field diaphragm. (P.14)
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