Nikon ECLIPSE E400 Instructions Manual page 30

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">. Problem
Cause
+
* .... Countermeasures
Viewing is poor;
details cannot be seen
clearty;
too much contrast;
too little contrast.
The compensation ring on an objective with a
compensation ring has not been adjusted.
Adjust the compensation ring according to the
cover glass.
There is dirt or dust on the lens, condenser,
objective or specimen.
Clean the components. (p.30)
Uneven focus
The revolving nosepiece has not been rotated until
it has clicked into place.
Turn the revolving nosepiece until it clicks into
place.
The specimen is not secured in place on the stage.
Install the specimen properly on the specimen
holder on the stage.
The stage has been installed on a slant.
Install the stage correctly. (p.28)
The revolving nosepiece has not been rotated until
it has clicked into place.
Turn the revolving nosepiece until it clicks into
place.
The specimen is not secured in place on the stage.
Install the specimen properly on the specimen
Image flows holder on the stage.
The condenser is not centered. Center the condenser. (p.27)
The stage has been installed on a slant. Install the stage correctly. (p.28)
An NCB11 filter is not being used. Use the NCBII filter. (p.14)
Image is yellowish
The lamp voltage is too low.
Image is too bright
The lamp voltage is too high.
Inadequate illumination
(also check the electrical
system problems and
countermeasures)
The lamp voltage is too low.
Push auto-photo switch and then adjust the
brightness through the ND filter combination.
(p.15)
The aperture diaphragm is stopped down too far.
Open the diaphragm to a suitable size. (p.16)
The condenser is too low.
Position the condenser so that the image of the field
diaphragm forms properly on the specimen. (p.27)
Focusing is not possible with
high-power objectives
The specimen is placed upside-down.
Affix the specimen on the stage with the cover
glass facing up.
The cover glass is too thick.
Use the specified type of cover glass
(thickness: 0.17 mm).
The specimen is placed upside-down.
Affix the specimen on the stage with the cover
when the objective is
switched is large
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