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4
Troubleshooting
Misuse of this product may adversely affect performance, even if this product is properly functional. If any of the following
problems occurs, be sure to check the following table for possible causes before requesting service.
If you detect problems that are not listed below or the problem still persists after measures are taken, turn off the device
and contact your nearest Nikon representative.
1
Optical System and Operation
General
1.1
Problem
A dirty or dusty field of
view when looking into
the eyepiece.
Dirt or dust appears on
the monitor.
The image quality is
poor.
The contrast or the
resolution is poor.
Cause
Dirt or dust rotates when the eyepiece is
turned.
The eyepiece is dirty.
Dirt or dust does not rotate when the
eyepiece is turned
(1) to (5)
(1) The specimen is dirty if dirt or dust
moves when the specimen is moved
on stage.
(2) The tip of the condenser lens is dirty if
dirt or dust goes in and out of view
when the condenser is moved up and
down while using a low magnification
objective.
(3) The objective is dirty if dirt or dust
disappears when the objective is
switched.
(4) A field diaphragm image is not focused
on the specimen surface. (Condenser
adjustment is incorrect)
(5) An aperture diaphragm is stopped
down too far.
Dirt or dust on the monitor moves when the
camera is turned
Lenses or specimen are dirty or dusty.
Dirt or dust on the monitor does not move
when the camera is turned
The camera is dirty.
No cover glass is attached.
The thickness of the cover glass is
inadequate.
The objective correction ring does not
match the thickness of the cover glass.
(For the objective with a correction ring)
Clean the eyepiece.
(→Chapter 5 "1.1 Cleaning Lenses")
(1) Clean the specimen.
(2) Clean the condenser.
(→Chapter 5 "1.1 Cleaning Lenses")
(3) Clean the objective.
(→Chapter 5 "1.1 Cleaning Lenses")
(4) Make sure the condenser is focused and
centered.
(→Chapter 2, "5 Focusing and Centering the
Condenser".)
(5) Open it to the proper size.
(→Chapter 2 "6 Adjusting the Aperture Diaphragm")
Check and clean them in accordance with "Dirt
or dust does not rotate when the eyepiece is
turned" of "A dirty or dusty field of view when
looking into the eyepiece."
Detach the camera and clean it by following
the instruction manual of the camera.
Attach a cover glass of the specified thickness
(0.17 mm). (However, no cover glass is
required for an NCG objective.)
Correct the ring as appropriate.
79
Measure
Chap. 4
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