www.microscopenet.com
- 9 -
5
Troubleshooting Guide
OPTICAL PROBLEMS
Problem
Cause
Solution
Darkness at the
periphery or uneven
brightness in the field
of view
Revolving nosepiece not in click
stop position
Revolve the nosepiece to click-stop
position by swinging the objective
correctly into the optical path
The light source of the bulb is
not at the center
Adjust the position of the bulb
Dirt or dust on the
view
Dirt or dust on the lens
eyepiece, condenser, objective,
collector lens or specimen
Clean the lens with a camera
cleaning kit
Dirt or dust on the specimen
Clean the specimen
Poor image quality
No slide cover attached to the
slide
Attach a 0.17mm slide cover
Slide cover is too thick or thin
Use a slide cover of the appropriate
thickness (0.17mm)
Slide may be upside down
Turn slide over so the cover-glass
faces up
Immersion oil is on a dry
objective (especially the 40x)
Check the objectives, clean if
necessary
No immersion oil used with 100x
objective
Use immersion oil
Air bubbles in immersion oil
Remove bubbles
Condenser aperture is closed or
open too much
Open or close properly
Condenser is positioned too low
Position the condenser upward
Kohler illumination system not
set properly
Set up the Kohler illumination system
according 3.4 on page 8.
ELECTRICAL PROBLEMS
Problem
Cause
Solution
Lamp does not light
when switched on
No electrical power
Check power outlet
Check power cord connection
Lamp bulb burnt out
Replace bulb
Fuse blown out
Replace fuse
