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Troubleshooting
6
If the product does not function properly, take appropriate action as described below. If the
problem is still not resolved after referring to "Troubleshooting," please contact your nearest Nikon
representative
6.1
Optical
Problem
Possible causes
Remedy
Parts are attached incorrectly.
Confirm that parts (nosepiece, condenser,
etc.) are correctly attached.
Movable parts are not switched
correctly.
Move parts (e.g., optical path switching
lever, nosepiece, filter cube switching
knob) until a click is felt.
Field diaphragm image is not focused
on the specimen surface.
Focus and center the condenser.
Field diaphragm is stopped down too
far.
Open the field diaphragm slightly wider
than the field of view.
Field of view vignetts.
Illumination is uneven
across the field of view.
Field of view is not
visible.
Dirt or dust is present on the lens or
container.
Clean off the dirt, and use a clean
container.
Dirt or dust is present on the lens or
container.
Clean off the dirt, and use a clean
container.
Dirt or dust is present in
the field of view.
Field diaphragm image is not focused
on the specimen surface.
Focus and center the condenser.
Dirt or dust is present on the lens or
container.
Clean off the dirt, and use a clean
container.
Objective correction ring does not
match the thickness of the
container’s bottom plate.
Adjust the correction ring.
Image quality is poor.
Contrast is poor.
Resolution is poor.
Field diaphragm image is not focused
on the specimen surface.
Focus and center the condenser.
Focus is uneven.
Revolving nosepiece is not attached
correctly, or has not been fully
rotated to the click stop position.
Attach it correctly and rotate to the click
stop position.
Specimen is tilted relative to the
stage surface.
Correctly reposition the specimen on the
stage.
Image flows.
Revolving nosepiece is not attached
correctly, or has not been fully
rotated to the click stop position.
Attach it correctly and rotate to the click
stop position.
Image is tinged yellow.
Lamp voltage is too low (for the 50i).
Increase the voltage with the brightness
control knob.
There is no ND filter in the optical
path.
Place ND filters in the optical path.
Field of view is too
bright.
Lamp voltage is too high (for the 50i).
Reduce the voltage with the brightness
control knob.
