Care, maintenance and trouble-shooting
Axiostar plus Troubleshooting Carl Zeiss
B 40-815 e 12/01 4-5
4.2.3 Troubleshooting
Problem Cause Remedy
The vis/doc knob on the
phototube is not in the correct
position (intermediate position)
Move the vis/doc knob on the
phototube to the correct position
(end position), see p. 3-18, 3-20
Nosepiece with objective not
switched to stop position
Switch nosepiece with objective
to stop position
Vignetting or
inhomogeneous image
brightness in the field of
view;
the field of view is not
entirely visible
Condenser not set correctly Set condenser correctly
(adjustment, centering),
see p. 3-4, 3-5
Aperture diaphragm not set
correctly
Set aperture diaphragm correctly
(centering , opening), see p. 3-5
Luminous field diaphragm not set
correctly
Set luminous field diaphragm
correctly (centering, opening), see
p. 3-5
Filter not inserted correctly in filter
mount
Insert filter correctly in filter
mount, see p. 3-3
Low resolving power and
poor image contrast
Aperture diaphragm opening not
set correctly
Set aperture diaphragm opening
in accordance with the 2/3 rule
or depending on the specimen
features, see p. 3-5
Condenser not focused correctly Focus condenser, see p. 3-4, 3-5
Wrong cover slip thickness for
0.17 transmitted-light objectives
Use the correct 0.17 mm cover
slips, see p. 1-7
Use of no or unspecified
immersion oil with CZ immersion
objectives
Use CZ immersion oil 518 N, see
p. 4-8
Air bubbles in the immersion oil Remove air bubbles by applying
new oil or by moving objective
back and forth
Immersion oil at the front lens of a
dry objective
Clean the front lens of the dry
objective, see p. 4-2
Corr. ring is not set to the correct
cover slip thickness
Set the corr. ring to the correct
thickness, see p. 1-7
Dirt or dust on the optical surfaces
of objectives, eyepieces,
condensers or filters
Clean the appropriate
components, see p. 4-2
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