9
action as needed. If you cannot solve the problem after checking the entire list,
please contact the service department for assistance.
1
、
Optical Part
Problem
Cause
Solution
the edge of the field of
view has shadow or the
brightness is uneven
The nosepiece is not in he located
position(objective is
not in the center of
the optical path)
Turn to the right
position(Turn objective
to the optical light
center)
）
The image of the filament is not
in the center
Center it
The surface of the lens is moldy
or has contaminant (
including condenser,
objective, eyepiece and
collector)
Clean it up
Find dust and stain in
the field of view
There are stains on the lens
(include
condenser,objective, eyepiece and
collector)
Clean it up
There are stains on the specimen
Clean it up
The position of the condenser is too
low
Loosen the
condenser’s locking bolt
adjust the
condenser to the
right position, then
screw down.
the image is
defocus(low
resolution/contrast)
There is no coverslip on the
specimen
add coverslip
The coverslip is too thick or too thin
Use
the
standard
coverslip
The specimen is placed inversely
Reverse it back
There was oil on the dry
objective(easily happened in 40X
objective)
Clean it up
There are stains on the lens
（
including condenser, objective,
eyepiece and collector
）
Clean it up
The oil objective didn’t immerse
oil
Use immerse oil
There was bubbles in the oil
Eliminate the bubbles
