CARE, FUSE REPLACEMENT AND SERVICE
Axio Lab.A1
Troubleshooting
Carl Zeiss
04/2013 430037-7144-001
109
5.3
Troubleshooting
Problem Cause
Troubleshooting
Shadows or inhomogeneous
image brightness in the field of
view; the field is not entirely
visible.
The vis/fot push-pull rod/shift knob on
the photo tube is not in the correct
position (intermediate position).
Move the vis/fot push-pull rod/shift
knob to the correct 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. 72 ff.
Aperture diaphragm not correctly
adjusted.
Set the aperture diaphragm correctly
(opening);
see p. 72 ff.
Luminous-field aperture not correctly
adjusted.
Set the luminous-field diaphragm
correctly (aperture);
see p. 72 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. 72 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. 72ff.
Wrong frame glass thickness for
transmitted light objectives corrected
for 0.17 mm frame glass thickness.
Use standard frame 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 Carl 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 frame glass.
Adjust the correction setting ring to
the correct frame glass thickness.
Dirt or dust on the optical surfaces of
objectives, eyepieces, condensers or
filters.
Clean the respective optical
components.
