Troubleshooting Guide - Llutico DN-107T Bedienungsanleitung

6. Troubleshooting Guide

1. Optical System
TROUBLE
The edge of the field
of view is dark or the
brightness is not
uniform
Find dust and stain
in the field of view
The image is
defocused (low
resolution \ contrast)
One side of the
image is dark
The image shift
during focusing
The nosepiece is not in the located position (objective
and light path not coaxial)
The image of filament is not centered
A lens (the objective, condenser, eyepiece or collector)
is dirty.
There are stains on the lens (including condenser,
objective, eyepiece and collector)
There are stains on the specimen
The position of the condenser is too low
There is no cover slip on the specimen
The cover slip is too thick or too thin
The specimen is placed inversely
There was oil on the dry objective (easily happened in
40X objective)
There are stains on the lens (including condenser,
objective, eyepiece and collector)
didn't use oil for the oil objective
There was bleb in the oil
Use a unsuitable oil
The size of the aperture diaphragm is too big
There are stains on the incident lens of the binocular
tube
The size of the aperture diaphragm is too small
The position of the condenser is too low
The condenser is not in the center of the field of view\
the condenser inclines
The nosepiece is not in the right position
The specimen is floating
The specimen slips on the stage
The nosepiece is not in the right position
CAUSE
14
DN-107T-US
SOLUTION
Locate the nosepiece
properly where it clicks
Center the filament
Clean it thoroughly
Clean it up
Clean it up
Loosen the condenser 's
locking bolt, adjust the
condenser to the right
position
Add coverslip
Use the standard
coverslip (0.17mm)
Reversal it back
Clean it up
Clean it up
Use immerse oil
Eliminate the bleb
Change to the specified
one
Minify it
Clean it up
Open it up
Adjust the position
Install the condenser
again and adjust the
center carefully by
centering the bolt
Turning it until it reach
the "clicked" position
Fix it
Fix it
Turn it to the " clicked "
position