Levenhuk D70L Digital Biological Microscope - Manual (Page 5)

Troubleshooting
If you are experiencing some problems with your instrument during its service, refer to this
section for possible solutions. However, if this doesn’t help, you should contact your local service
center.
Problem Possible cause Solution
Uneven illumination
throughout the field of
view The objective lens is not locked in
place, i.e. optical system is not
properly aligned. Rotate the revolving nosepiece
until the lens locks in place.
The diaphragm disc is not locked
in place Rotate the disc until it locks in
place
One of the lenses is dirty Clean the lens from dust or dirt
Clean the stage from
dust One of the lenses is dirty Clean the lens from dust or dirt
The stage is dirty Clean the stage from dust
Reduced quality of
views (low resolution,
poor contrast) One of the lenses is dirty Clean the lens from dust or dirt
The field of view is
clipped The objective lens is not locked in
place Rotate the revolving nosepiece
until the lens locks in place
The diaphragm disc is not locked
in place Rotate the disc to lock the
diaphragm in place
The slide is moving Use stage clips to hold it in place
When changing
objective lenses, they
scrape the slide on the
stage The slide is upside down Place it correctly
The cover glass is too thick Use a cover glass of standard
thickness
The illumination system
does not work One of the batteries is needs
replacing One of the batteries is needs
replacing Change
The monitor does not
work The power cable is not plugged in Make sure that the power cable is
plugged into the socket and the AC
jack
Store the device in a dry, cool place away from dust, hazardous acids and other chemicals, away
from heaters, open fire and other sources of high temperatures. Do not use the device for
lengthy periods of time, or leave it unattended in direct sunlight. Keep the device away from
water and high humidity.
Be careful during your observations, always replace the dust cover after you are finished with
observations to protect it from dust and stains.
If you are not using your microscope for extended periods of time, store the objective lenses
and eyepieces separately from the microscope.