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CARE, FUSE REPLACEMENT AND SERVICE
Axiolab 5
Troubleshooting
ZEISS
05/2019
430037-7444-001
121
5.3
Troubleshooting
5.3.1
Microscope
Problem
Cause
Solution
No illumination light after
switching on the microscope.
Nosepiece and/or reflector turret are not
engaged to defined positions.
Move the nosepiece and/or reflector
turret to the left or right to engage
the nosepiece and/or reflector turret
to defined positions. Then restart the
microscope.
Shadows or inhomogeneous
image brightness in the field of
view; the field is not entirely
visible.
The vis/phot push-pull rod/shift knob on
the photo tube is not in the correct
functional position (intermediate
position).
Move the vis/phot push-pull rod/shift
knob to the correct functional position
(end position).
Nosepiece with objective not engaged in
click-stop.
Push in nosepiece with objective until
it engages.
Condenser not correctly adjusted.
Set the condenser correctly
(adjustment, centering);
see p. 81 ff.
Aperture diaphragm not correctly
adjusted.
Set the aperture diaphragm correctly
(opening);
see p. 81 ff.
Luminous-field aperture not correctly
adjusted.
Set the luminous-field diaphragm
correctly (aperture);
see p. 81 ff.
The filter has not been inserted correctly
in the filter mount.
Insert filter correctly in the filter
mount.
Low resolving power and poor
image contrast.
Aperture diaphragm not correctly
adjusted.
Set the aperture diaphragm as per
2/3 rule or the specimen features;
see p. 81 ff.
The condenser has not been correctly
focused and front lens 0.9 not swiveled
in/out correctly.
Focus the condenser and swivel front
lens 0.9 in or out correctly;
see p. 81 ff.
Wrong cover glass thickness for
transmitted light objectives corrected for
0.17 mm cover glass thickness.
Use standard cover glass with a
thickness of 0.17 mm.
Specimen slide placed upside down.
Turn the specimen slide over; the
specimen side should be on top.
Use of no or non-specified immersion oil
with immersion objectives.
Use immersion oil 518 N or 518 F
from ZEISS
Air bubbles in immersion oil.
Repeat oiling procedure with fresh oil.
Immersion oil on the front lens of a dry
objective.
Clean the front lens of the dry
objective.
Correction setting is not set to the proper
thickness of the cover glass.
Adjust the correction setting ring to
the correct cover glass thickness.
Dirt or dust on the optical surfaces of
objectives, eyepieces, condensers or
filters.
Clean the respective optical
components.