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7
TROUBLE SHOOTING GUIDE
7. TROUBLE SHOOTING GUIDE OF
NIB610/NIB620/NIB630
Under certain conditions performance of the unit may be adversely affected
by factors other than defects. If problems occur, please review the following
list and take remedial action as needed. If you cannot solve the problem
after checking the entire list, please contact Bresser GmbH for assistance.
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 pro-
perly 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
Dirt or dust is visible in
the field of view
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
Adjust the aperture dia-
phragm
Dirt or dust on the
eyepiece
Clean it
The aperture diaphragm
is too small
Adjust the aperture dia-
phragm
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
Adjust the aperture dia-
phragm
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