3002-CB FORENSIC COMPARISON MICROSCOPE SERIES
ACCU-SCOPE
®
73 Mall Drive, Commack, NY 11725 • 631-864-1000 • www.accu-scope.com
16
TROUBLESHOOTING
Under certain conditions, performance of this unit may be adversely affected by factors other than defects. If a
problem occurs, please review the following list and take remedial action as needed. If you cannot solve the
problem after checking the entire list, please contact your local dealer for assistance.
IMAGE PROBLEMS
Problem Cause
Corrective
Measure
The edge of the
field of view is dark
or the brightness is
not uniform
The nosepiece is not in the located position (objective
and light path not coaxial)
Locate the nosepiece
properly where it clicks
The image of filament is not centered
Center the filament
A lens (the objective, condenser, eyepiece or collector) is
dirty.
Clean it thoroughly
Find dust and stain
in the field of view
There are stains on the lens
（
including condenser,
objective, eyepiece and collector
）
Clean it
There are stains on the specimen
Clean it
The position of the condenser is too low
Loosen the condenser’s
locking bolt, adjust the
condenser to the right
position
The image is
defocused
( low resolution /
contrast)
There is no cover slip on the specimen
Add cover slip
The cover slip is too thick or too thin
Use the standard cover
slip ( 0.17mm )
The specimen is placed inversely
Reverse it back
There was oil on the dry objective(easily happened in
40X objective)
Clean it
There are stains on the lens
（
including condenser,
objective, eyepiece and collector
）
Clean it
Didn’t use oil for the oil objective
Use immersion oil
There is an air bubble in the oil
Eliminate air bubble
Use of non-recommended oil
Use manufacturer’s
recommended oil
The size of the aperture diaphragm is wide open
Adjust it
There are stains on the incident lens of the binocular
tube
Clean it
The size of the aperture diaphragm is too small
Adjust it
The position of the condenser is too low
Adjust the position
