BX51
21
TROUBLESHOOTING GUIDE
Under certain conditions, performance of the unit may be adversely affected by factors other than defects. If problems occur,
please review the following list and take remedial action as needed. If you cannot solve the problem after checking the
entire list, please contact your local Olympus representative for assistance.
1. Optical System
29
3
Problem
Cause Remedy Page
a) Bulb does not light. Bulb is burned out. Replace bulb.
Power cord is unplugged. Plug power cord into the power outlet.
Transmitted/reflected light switch is set
to (reflected light). (TRF models only)
Set the switch to (transmitted light
illumination).
b) Bulb operates, but field of view re-
mains dark.
Aperture and field iris diaphragms are not
opened wide enough.
Adjust them to proper sizes.
Condenser is lowered too much.
Adjust the condenser height position.
Light path selector knob is set to the
position.
Move the knob to the or
posi-
tion.
c) Field of view is obscured or not
evenly illuminated.
Light path selector knob is in an inter-
mediate position.
Set the knob according to the obser-
vation method.
Revolving nosepiece is not correctly en-
gaged.
Make sure that the revolving nosepiece
clicks properly into place.
Condenser is not attached properly. Re-attach it.
Revolving nosepiece is not attached
properly.
Push the side dovetail all the way until
it is stopped.
An objective that falls outside of the
condenser’s illumination range is used.
Use a condenser to match the pur-
pose.
Condenser is not properly centered.
Center the condenser.
Field iris diaphragm is stopped down too
far.
Open the field iris diaphragm until it
circumscribes the field.
Bulb is not mounted correctly.
Push the pins of halogen bulb all the
way until the stop position.
d) Dirt or dust is visible in the field of
view.
Dirt/dust on the eyepiece.
Clean thoroughly.
Dirt or the to surface of the condenser.
Dirt/dust on the specimen.
e) Visibility is poor.
· Image is not poor.
· Contrast is poor.
· Details are indistinct.
· Image glares.
A non-UIS2/UIS objective is used.
Use only UIS2/UIS series objectives
with this microscope.
Condenser is lowered too far. Adjust the condenser height position.
Aperture iris diaphragm is stopped down
too far.
Open aperture iris diaphragm.
Revolving nosepiece is not mounted
properly.
Push the slide dovetail all the way until
it is stopped.
Correction collar on correction collar
equipped objective is not properly ad-
justed.
While focusing, turn the correction
collar to find the best position.
Front lens of objective is dirty. Clean objective.
Immersion oil is not being used with an
oil immersion objective.
Use immersion oil.
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