24
Chapter 6 Troubleshooting
A16.1065
6.1
Optical System
TROUBLE
CAUSE
SOLUTION
The edge of the field
of view is dark or
the brightness is not
uniform
The nosepiece is not in the located
position (objective and light path not
coaxial)
Locate the nosepiece properly
where it clicks
A lens (the objective, condenser,
eyepiece or collector) is dirty.
Clean it thoroughly
Dirt
or
dust
is
visible in the field of
view
A lens (the objective, condenser,
eyepiece or collector) is dirty.
Clean it
Dirt/dust on the specimen
Clean it
Specimen is placed reversely
Turn it over
A lens (the objective, condenser,
eyepiece or collector) is dirty.
Clean it
The aperture diaphragm is too large
Appropriate down
Dirt or dust on the eyepiece
Clean it
The aperture diaphragm is too small
Appropriate up
One side of image is
blurred
Condenser is not properly centered
Center the condenser with the
centering screw
The nosepiece is not properly
engaged
Engage the nosepiece properly
The specimen is not clamped
Clamp it with stage clips
The image moves
while focusing on
the zoom
Specimens float on the surface of the
platform
placed it stably
The nosepiece is not properly
engaged
Engage the nosepiece properly
The brightness is not
enough
The aperture diaphragm is too small
Appropriate up
