16
CX31
Problem Cause Remedy Page
2. Coarse/Fine Focus Adjustment
a) Coarse adjustment knob is hard to
turn.
Tension adjustment ring is
overtightened.
Loosen it.
9
3. Observation Tube
Field of view of one eye does not
match that of the other.
Interpupillar distance is incorrect. Adjust interpupillary distance. 11
4. Stage
Image blurs as you move specimen. Specimen is not correctly positioned
on the stage.
Mount specimen correctly by
applying it on stage surface and
inserting below specimen holder.
10
5. Objective Change
Front lens of a high power objective
comes into contact with specimen
when it is engaged after a low-power
objective.
Specimen is mounted upside down. Mount specimen correctly. –
Cover glass is too thick. Use 0.17 mm thick cover glass.
10
6. Electrical System
a) Bulb does not light. Bulb is not mounted. Mount designated bulb. 6
b) Stage drifts down by itself or focus
is lost during observation.
Tension adjustment ring is too loose. Tighten it.
9
c) Coarse adjustment will not go all
the way up.
Simplified pre-focusing dial is
keeping the stage down.
Set stopper mechanism to
uppermost position.
9
d) Coarse adjustment will not go all
the way down.
Condenser holder is too low. Raise condenser holder.
13
e) Objective makes contact with
specimen before focus is
obtained.
Specimen is mounted upside down. Mount specimen correctly.
–
Incorrect diopter adjustment. Adjust diopter. 11
Your view is not accustomed to
microscope observation.
Upon looking into eyepieces, try
looking at overall field before
concentrating on specimen range.
You may also find it helpful to look
up and into distance for a moment
before looking back into microscope.
–
Bulb is burnt out. Replace bulb. 6
Power cord plug is not connected. Connect power cord. 6
b)
Bulb burns out almost immediately.
Wrong type of bulb is used. Use correct bulb type. 6
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