49
IX71/IX51
Under certain conditions, performance of the microscope 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.
TROUBLESHOOTING GUIDE
Problem
64
Cause
Remedy
Page
1. Optical System
a) The bulb does not light.
Power cord of the power supply unit is
unplugged.
Plug the power cord into a power
outlet.
Main switch of the power supply unit is
not ON.
Set the main switch to “
I
” (ON).
Lamp ON/OFF switch on the IX71 frame
or the TH4-HS hand switch is not ON.
Set the Lamp ON/OFF switch to ON.
Bulb is burnt out.
Replace the bulb.
b) The bulb lights but the field of view
is dark.
Lamp voltage is too low.
Increase the light intensity to an
optimum voltage.
Condenser is not well positioned.
Adjust the condenser height until the
field iris diaphragm image is formed
in the specimen plane.
Condenser is not centered.
Center the condenser so that the field
iris diaphragm image is centered in
the field of view.
Revolving nosepiece is not in a click
position.
Make sure that the revolving nose-
piece clicks properly into place.
Light path selector knob is set for the
side port light path.
Set the knob to the binocular eyepiece
light path position or increase the light
intensity.
Too many filters are used.
Reduce the number of filters to the
minimum required.
Stage center plate is engaged in the light
path.
Move the stage and place the
specimen again.
Field iris diaphragm is not opened wide
enough.
Open the field iris diaphragm sufficiently.
Light path selector knob of the trinocular
tube is pulled out.
Set the knob at the middle or pushed-
in position.
Turret of the U-BI9CT is set to position “S”.
Rotate the turret to position “0”.
c) Field of view is obscured or not
evenly illuminated.
Light path selector knob of the trinocular
tube is set to an intermediate position.
Set the light path selector button to a
click position according to the purpose.
An objective that falls outside the
condenser’s illumination range is used.
Use a condenser that matches the
objective.
Field iris diaphragm is not properly
centered.
Center the field iris diaphragm correctly.
Field iris diaphragm is stopped down too
far.
O p e n t h e f i e l d i r i s d i a p h r a g m
sufficiently.
Light path selector knob is in an inter-
mediate position.
Engage the knob all the way in or at a
click stop according to the observation
method.
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