Nikon ECLIPSE L200ND / ECLIPSE L200N Instructions Manual page 63

Trouble
Dirt or dust in the viewfield.
Inferior image
(contrast too high or low)
(low resolution)
Image is partially dim.
Image moves while being
focused.
Image tinged yellow.
Image too bright.
Dark image.
(Also refer to the troubles
and countermeasures on
"5.2 Electrical".)
5 Troubleshooting
Causes
Aperture diaphragm stopped down
too far.
Dirt or dust on the lenses,
eyepieces, filters and the sample.
Dirt or dust on the condenser lens
(for diascopic illumination).
Dirt or dust on the lenses,
eyepieces, filters and the sample.
Wrong type of objective is used.
Aperture diaphragm stopped down
too far.
Sample not securely fit on the
stage.
Stage tilted.
NCB11 filter not used.
Lamp voltage too low.
Lamp voltage too high.
Lamp voltage too low.
Aperture diaphragm stopped down
too far.
49
IC Inspection Microscope ECLIPSE L200ND / L200N Instructions
Countermeasures
Open it to the appropriate size.
(See "3.6.1 Adjusting the size
of the aperture diaphragm".)
Clean them.
(See "6.2 Cleaning the lens".)
Clean them.
(See "6.2 Cleaning the lens".)
Use the objectives marked "L
Plan", "LU Plan" or "LU Plan
Apo".
Open it to the appropriate size.
(See "3.6.1 Adjusting the size
of the aperture diaphragm".)
Fit the sample securely on the
sample holder of the stage.
Mount the stage correctly.
(See "4.5 Attaching the stage
and the holder".)
Place the NCB11 filter in the
optical path.
(See "3.1 Filters".)
Adjust the brightness with the
brightness control dial and the
ND filter.
Adjust the brightness with the
brightness control dial.
(See "1.2 Names of the
operational parts".)
Or, use ND filters. (See "3.1
Filters".)
Adjust the brightness with the
brightness control dial.
(See "1.2 Names of the
operational parts".)
Open it to the appropriate size.
(See "3.6.1 Adjusting the size
of the aperture diaphragm".)