M46 Microscope Troubleshooting:
15
Fein
TROUBLE
POSSIBLE CAUSE
SOLUTION
The objective
touches the sample
while turning the
nosepiece from low
magnification to high.
Stage is too high.
Lower it to an appropriate
position.
Coarse focusing knob
is too tight.
Tensions adjustment ring is too tight.
Loosen it to an appropriate
position.
Stage declines itself
and cannot stay on
the focal plane.
Tension adjustment ring is too loose.
Tighten it to an appropriate
position.
Coarse focusing knob
cannot rise.
The coarse limit knob is locked.
Loosen the coarse limit knob.
The image moves
obviously when
touching the stage.
The stage is fastened incorrectly.
Fasten the stage correctly.
The bulb doesn’t
work.
No power supply.
Check the connection of the
power supply.
The bulb is not installed correctly.
Install it correctly.
The bulb burned out.
Replace it.
The bulb burns out
often.
The wrong bulb is used.
Replace it with the correct bulb.
The illumination is
not bright enough.
The wrong bulb is used.
Replace it with the correct bulb.
The use of light adjustment knob is wrong.
Adjust it correctly.
The bulb flickers or
the brightness is not
stable.
The bulb will burn out soon.
Replace it with a new one.
The wire doesn’t connect well.
Connect it correctly.