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- 9 -
IMAGE PROBLEMS
Problem
Cause
Solution
Image moves while
focusing
Specimen rises from stage
surface
Secure the specimen in the slide
holder
Revolving nosepiece is not in the
click-stop position
Revolve the nosepiece to the
click-stop position
Image tinged yellow
Blue filter not used
Use daylight blue filter
Lamp intensity is too low
Adjust the light intensity by rotating
the intensity control dial
Image is too bright
Lamp intensity is too high
Adjust the light intensity by rotating
the intensity control dial
Insufficient
brightness
Lamp intensity is too low
Adjust the light intensity by rotating
the intensity control dial
Aperture diaphragm closed too far Open to the proper setting
Condenser position too low
Position the condenser upward
MECHANICAL PROBLEMS
Problem
Cause
Solution
Image will not focus
with high power
objectives
Slide upside down
Turn the slide over so the cover
glass faces up
Cover glass is too thick
Use a 0.17mm cover glass
High power objective
contacts slide when
changed from low
power objective
Slide upside down
Turn the slide over so the cover
glass faces up
Cover glass is too thick
Use a 0.17mm cover glass
Diopter adjustment is not set
properly
Readjust the diopter settings
Slippage of focus
when using the
coarse focusing
knob Fine focus is
ineffective
Tension adjustment is set too low
Increase the tension on the focusing
knobs
Tension adjustment is set too high
Loosen the tension on the focusing
knobs
