Chapter 8 Troubleshooting
1 Optical
38
Image too bright.
Causes Corrective Measures
ND filter for the objective is not used.
Attach the ND filter for the objective.
(P.26)
Lamp voltage is too high.
Adjust the voltage by rotating the
brightness control dial. (P.17)
Insufficient brightness.
Causes Corrective Measures
Lamp voltage is too low.
Adjust the voltage by rotating the
brightness control dial. (P.17)
Aperture diaphragm is closed too far.
Open properly. (P.15)
Condenser position is not correct.
If the microscope is equipped with a
field diaphragm, correct positioning so
that the field diaphragm image is
focused on the specimen surface. (P.14)
If the microscope is not equipped with a
field diaphragm, position the condenser
slightly lower than the upper limit.
When an optical path switchable
eyepiece tube is attached, optical path is
not switched to the eyepiece 100%.
Switch the optical path to the eyepiece
100%.
The lamp has reached the end of its
service life. (for E200 MV series only)
Replace the lamp. (P.32)
Image is yellowish or bluish. (for E200 MV series only)
Causes Corrective Measures
If yellowish, blue filter is not used.
Use blue filter. (P.30)
Lamp voltage is too low or too high.
Adjust the voltage by rotating the
brightness control dial. (P.17)
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