Mi50 Inverted Microscope Trouble Shooting
14
Fein
TROUBLE
POSSIBLE CAUSE
SOLUTION
Bulb is on but field
of view is dark.
Field diaphragm is not open enough.
Adjust field diaphragm.
Rheostat is too low.
Adjust rheostat control.
Polarizer & analyzer are being used.
Remove polarizer and
analyzer sliders.
Side of field of
view is dark or
uneven.
Nosepiece is not in position.
Rotate nosepiece.
Dust on objective or eyepiece.
Clean lenses.
Color filter, polarizer or analyzer are not
in correct position.
Insert or remove filters or
polarizer or analyzer.
Beam splitter is not in correct position.
Adjust beam splitter.
Stain or dust in
field of view.
Stains on specimen.
Clean specimen.
Lenses are dirty.
Clean lenses.
Image is unclear.
Cover glass on specimen.
Do not use cover glass.
Specimen is not vertical to objective
lens.
Adjust specimen.
Nosepiece is not in the correct position. Adjust nosepiece.
Aperture diaphragm is not open
properly.
Adjust aperture diaphragm.
Dust on eyepiece or objective.
Clean lenses.
Beam splitter is not in correct position.
Adjust beam splitter.
One side of image
is dark and the
image moves
while focusing.
Specimen is not placed on the stage
properly.
Reposition specimen.
Nosepiece is not in correct position.
Adjust nosepiece.
Eyes tire easily and
right field of view
doesn’t impose
with left.
Interpupillary distance is not set.
Adjust interpupillary
distance.
Diopter adjustment is not set.
Adjust diopter.
Eyepieces in left and right eyetubes are
different.
Use the same eyepieces.
Coarse focus knob
is too tight.
Tension adjustment knob is too tight.
Loosen tension adjustment.
Stage falls.
Tension adjustment knob is too loose.
Tighten tension adjustment.
