Olympus BHTU - Troubleshooting Guide

VII. TROUBLESHOOTING GUIDE
If you are unable to obtain full performance from your microscope, please consult with the
table below as pointers for troubleshooting.
Phenomenon
Cause
Remedy
1. Optical System
a)
With illuminator switched
Field iris
diaphragm
IS
not
Open
diaphragm
to
proper
on, the
field
of
view is
opened sufficiently. diameter.
dark.
Condenser
is lowered
too
Adjust condenser height.
much.
Light path selector
lever is
Push in lever
up to CV or V
pulled
out to C position.
position.
b)
Field of view is cut off or
Light
path selector lever
is
Click
it into proper position
illuminated irregularly.
stopped midway. according to your
purpose.
Nosepiece is not clicked
into
Slightly rotate nosepiece until
place. it cl icks into place.
The power of objective used
Choose a condenser
to
meet
exceeds
the illu'mination
ca-
your purpose.
pacity of condenser.
Condenser
is
not centered.
Center condenser.
Field
irisdjaphragm is stopped
Open diaphragm to
proper
down excessively.
diameter.
c)
Dust
or dirt is visible
In
Dust, etc. on light
exit lens
Remove
dust, etc.
the field of view.
Dust on condenser top lens
Clean
front tenses.
Dirty specimen
Dust on eyepiece
d)
Excessive image contrast
Condenser
is lowered
too
Adjust condenser height.
much.
Aperture iris diaphragm
is
Open diaphragm to
proper
stopped down excessively.
diameter.
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