Instructions

12
9. Troubleshooting Guide
Under certain conditions, performance of the microscope may be adversely affected by factors
other than defects. If problems occur, please review the following list and take remedial action
as needed.
If you cannot solve the problem after checking the entire list, please contact your local
representative for assistance.
Problem Cause Remedy
1.Optical System
Power cord of the power supply
unit is unplugged.
Plug in the power cord.
Main switch of the power supply
unit is not ON.
Switch the main power switch
to “I”(on).
a) The bulb does not light.
The bulb is burnt out. Replace the bulb
The voltage is too low Increase light intensity.
Revolving nosepiece is not in a
click position.
Make sure that the revolvong
nosepiece clicks properly into
place.
Light path selector knob is set
for the side port light path.
Set the knob to the binocular
eyepiece light path position.
Too many filters are used. Reduce the filters to the
minimum required.
b) The bulb lights but the
field
of view is dark.
The stage central plate is
engaged in the optical path.
Move the stage and place the
specimen again.
Light path selector knob is set
to an intermediate position.
Set the light path selector
button to a click position
according to the purpose.
Revolving nosepiece is in an
intermediate position.
Engage the revolving
nosepiece at a click stop.
A filter is stooped in an
intermediate position.
Set the filter at the
appropriate position.
c) Field of view is obscured
or
not evenly illuminated.
The frost filter is not engaged. Engage the frosted glass.
d) The image glares. Aperture iris diaphragm is
stopped down too far.
Adjust the aperture iris
diaphragm.
The front lens of the objective is
dirty.
Clean the objective.
Inappropriate slide or cover
glass thickness.
Change the slide for one with
suitable thickness.
The optical parts are covered
with dust.
Clean them all.
f ) Visibility of the image is
poor:
Image is not sharp.
Contrast is poor.
Details are poorly visible.
Ring slit and phase plate are
not centered.
Center then correctly.