16
150 Series
Troubleshooting
Common Issues
Symptom Cause Remedy
OPTICAL ISSUES
One side of the eld
of view is darker
e nosepiece if misaligned Turn the nosepiece until it clicks into place
Stains or dust has accumulated on the objective,
eyepieces, or base lens
Clean all lenses with lens cleaner or a lint free non-
abraisive cloth
Obstructions are
observed in the eld
of view
Stains, dust, or dirt has accumulated on the speci-
men
Clean the slide or use a new specimen if sample is
destroyed
Stains, dust, or dirt have accumulated on the lens Clean the lens
Unclear Image ere is no cover slip on the slide Add a cover slip. e objectives are designed for use
with a 0.17mm cover slip, so it is a requirement to
use one for proper images.
e cover slip is not standard sized Replace the cover slip with the appropriate 0.17mm
thickness slip
e aperture is not open to an appropriate diam-
eter
Adjust the aperture to have the light just larger than
the size of the condenser
Stain or dust has accumulated on the lens in the
inlet of the head
Clean the lens with lens cleaner or a nonabraisive
lint free cloth, as well as spray with compressed air
One side of the eld
of view is dark or the
image moves while
focusing
e specimen slide is not xed Secure the slide to the stage with clips
e nosepiece is not in the right position Turn the nosepiece until it clicks into place
e eld of view is not
bright enough
e iris disc diaphragm is not big enough Rotate the iris disc diaphragm to allow more light
to travel
Stains, dust, or dirt has accumulated on the con-
denser, objective, eyepieces, or base lens
oroughly clean tall lenses with lens cleaner or a
lint free nonabraisive cloth
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