18
IMAGE QUALITY
Problem Cause
Solution
No image.
Nosepiece badly
positioned.
Turn, until it clicks into
position.
Image too bright.
Reduce light intensity.
Poor resolution.
Objective lens dirty.
Clean objective.
Eyepiece lens dirty.
Clean eyepiece.
Specimen slide up
side down.
Place slide with slip
facing up.
Cover slip on specimen
slides wrong thickness.
Use 0.17mm thick cover
slip.
Light too bright.
Reduce light intensity or
adjust diaphragm
aperture.
Condenser dirty.
Clean condenser.
Spots in field
of view
Dirty eyepiece.
Clean eyepiece.
Dirty slide.
Clean slide.
Dirty condenser.
Clean condenser.
Uneven illumination
of field
Nosepiece not properly
positioned.
Turn until clicks into
position.
Diaphragm not properly
positioned.
Adjust accordingly.
