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Trouble Cause Remedy Page
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2. Electric System
a) The bulb flickers and the light
intensity is unstable.
The line voltage fluctuates. Use a voltage stabilizer.
The bulb is almost burned out.
Replace it with a new one.
The power cord is not connected securely. Connect it securely.
3. Focusing
a) The coarse adjustment knob
is too diffcult to turn.
Loosen it appropriately.
b) The image goes out of focus
during observation.
Tighten it appropriately.
4. Observation Tube
a) The fields of view of the left
and right eyepieces do not
match.
The interpupillary distance is not correctly
adjusted.
Adjust it correctly.
The diopter is not corrected.
Correct the diopter according to your eye-
sight.
You are not accustomed to binocular vision. Do not try to gaze at the specimen right
after looking into the eyepieces. Instead,
look at the entire field of view. Or take your
eyes away from the eyepieces briefly and
look at something else, then look into the
eyepieces again.
The coarse tension adjustment ring is
tightened too much.
The coarse tension adjustment ring is
loosened too much.
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