Troubleshooting - Nikon ECLIPSE TE2000-E Instructions Manual

V. Troubleshooting
If the microscope does not function properly, take appropriate action as described below. If the problem is still not
resolved after referring to "Troubleshooting," please contact your nearest Nikon representative.
1. Optical
Symptoms
Parts not correctly installed.
View field
vignetting. Movable parts not switched correctly.
Uneven
brightness in the
Stage ring on the optical path.
view field.
Field diaphragm image not focused on the
View field not
specimen surface.
visible.
Field diaphragm stopped down too far.
Dirt or dust on lens and container.
Dirt or dust on lens and container.
Dirt or dust in the
Field diaphragm image not focused on the
view field.
specimen surface.
Dirt or dust on lens and container.
Objective's correction ring not set to the
Poor image
bottom plate thickness of the container.
quality.
Bottom plate thickness of the container is
Poor contrast.
outside the correction range of the
objective.
Poor resolution.
Field diaphragm image not focused on the
specimen surface.
Bright-field objective is used.
Condenser annular diaphragm not on
No phase
optical path.
contrast effect.
Condenser annular diaphragm not
(on Ph
centered.
microscopy)
Aperture diaphragm not fully open (when
using system condenser).
Revolving nosepiece not installed correctly,
Uneven focus.
or not rotated to the click stop position.
Specimen tilted against stage surface.
Revolving nosepiece not installed correctly,
or not rotated to the click stop position.
Image flows.
Condenser annular diaphragm not
centered.
Dia-illuminator tilted.
No NCB11 filter in the optical path.
Yellowish image.
Lamp voltage too low.
Causes
Install the parts (nosepiece, condenser, etc.)
correctly.
Rotate the parts till the click stop position or till the
limit. (Parts such as optical path switchover dial,
nosepiece, filter sliders, condenser turret, eyepiece
tube turret and photo-mask dial.)
Change the specimen position.
Perform condenser focusing and centering correctly.
Open to slightly large a size as the view field.
Clean them. Use clean container.
Clean them. Use clean container.
Perform condenser focusing and centering correctly.
Clean them. Use clean container.
Adjust correctly.
Use container with bottom plate thickness within
correction range.
Perform condenser focusing and centering correctly.
Use Ph objective.
Put the annular diaphragm that matches the Ph code
of the objective into the optical path.
Center the annular diaphragm.
Open fully.
Install correctly and rotate to the click stop position.
Correctly reposition specimen on stage.
Install correctly and rotate to the click stop position.
Center the annular diaphragm.
Raise till it hits the limit.
Put it in the optical path.
Adjust the brightness adjustment dial to match the
lamp ratings.
V. Troubleshooting
Countermeasures
61