Nikon Epiphot 300 Manual page 70

Symptoms
• Specimen surface to be observed not totally
attached to stage surface.
• Stage ring not correctly fitted to stage surface.
• Stage not correctly mounted.
Partially focused
image.
• Revolving nosepiece not in click stop position.
• Revolving nosepiece incorrectly mounted.
Nosepiece clamp not tight.
• Objectives not correcly mounted.
• Revolving nosepiece not correctly mounted.
Nosepiece clamp not tight.
Image shifts during
• Objectives not correctly mounted.
focusing.
• Optical path changeover lever in intermediate
position.
• NCB 11 filter not used.
Yellowish image.
• Lamp voltage too low.
• ND filters not used.
Viewfield too
• Lamp voltage too high.
bright.
• Lamp voltage too low.
• Aperture diaphragm stopped down more than
lnadequete
necessary.
brightness.
• Optical changeover levers are not operated to
provide 100% light output for eyepieces. (Light
output is set to the side port or to the 35
mm/large format.)
Causes
Actions
Fix specimen so that its
surface totally attaches
the stage surface.
Refit it to stage correctly.
Remount it correctly.
(P. 6)
Rotate it to click stop.
Remount nosepiece to
the limit and clamp it
firmly. (P. 6)
Screw them in to the
limit.
Remount the nosepiece
to the limit and clamp it.
(P. 6)
Screw them in to the
limit.
Move it to the limit.
(P. 40)
Use NCB11 filter. (P. 25)
Rotate light intensity
control dial to raise
voltage.
Use ND filters. (P. 26)
Rotate light intensity
control dial to reduce
voltage.
Rotate light intesity
control dial to raise
voltage.
Open it properly. (P. 35)
Operate the lever to
provide eyepieces with
100% light output. (p. 40)
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