CARE, FUSE REPLACEMENT AND SERVICEAxiolab 5 Troubleshooting ZEISS05/2019 430037-7444-001 1215.3 Troubleshooting5.3.1 MicroscopeProblem Cause SolutionNo illumination light afterswitching on the microscope.Nosepiece and/or reflector turret are notengaged to defined positions.Move the nosepiece and/or reflectorturret to the left or right to engagethe nosepiece and/or reflector turretto defined positions. Then restart themicroscope.Shadows or inhomogeneousimage brightness in the field ofview; the field is not entirelyvisible.The vis/phot push-pull rod/shift knob onthe photo tube is not in the correctfunctional position (intermediateposition).Move the vis/phot push-pull rod/shiftknob to the correct functional position(end position).Nosepiece with objective not engaged inclick-stop.Push in nosepiece with objective untilit engages.Condenser not correctly adjusted. Set the condenser correctly(adjustment, centering);see p. 81 ff.Aperture diaphragm not correctlyadjusted.Set the aperture diaphragm correctly(opening);see p. 81 ff.Luminous-field aperture not correctlyadjusted.Set the luminous-field diaphragmcorrectly (aperture);see p. 81 ff.The filter has not been inserted correctlyin the filter mount.Insert filter correctly in the filtermount.Low resolving power and poorimage contrast.Aperture diaphragm not correctlyadjusted.Set the aperture diaphragm as per2/3 rule or the specimen features;see p. 81 ff.The condenser has not been correctlyfocused and front lens 0.9 not swiveledin/out correctly.Focus the condenser and swivel frontlens 0.9 in or out correctly;see p. 81 ff.Wrong cover glass thickness fortransmitted light objectives corrected for0.17 mm cover glass thickness.Use standard cover glass with athickness of 0.17 mm.Specimen slide placed upside down. Turn the specimen slide over; thespecimen side should be on top.Use of no or non-specified immersion oilwith immersion objectives.Use immersion oil 518 N or 518 Ffrom ZEISSAir bubbles in immersion oil. Repeat oiling procedure with fresh oil.Immersion oil on the front lens of a dryobjective.Clean the front lens of the dryobjective.Correction setting is not set to the properthickness of the cover glass.Adjust the correction setting ring tothe correct cover glass thickness.Dirt or dust on the optical surfaces ofobjectives, eyepieces, condensers orfilters.Clean the respective opticalcomponents.
