17
BXFMA
TROUBLESHOOTING GUIDE
Under certain conditions, performance of the system 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.
Problem
Cause
Remedy
Page
–
9
7
27
11
15
15
28
11
11
27
3
20-22
3
11
–
28
1. Optical System
a) Bulb does not light.
The power cord of BX-UCB (or TH4) is
unplugged.
Insert the power plug firmly into the
power outlet.
The main switch of BX-UCB (or TH4) is
not on.
Set the main switch to “
I
” (ON).
The transmitted light illumination is set for
reflected light observation or vice versa.
Press the transmitted/reflected light
switch button once.
The bulb is burnt out.
Replace the bulb with a new specified
bulb.
b) Bulb operates, but field of view re-
mains dark.
The aperture and field iris diaphragms
are not opened wide enough.
Open them to the proper sizes.
The light path selector lever of trinocular
tube is in an intermediate position.
Move the knob to position or .
c) Field of view is obscured or not
evenly illuminated.
The light path selector lever of trinocular
tube is in an intermediate position.
Set the knob according to the obser-
vation method.
The revolving nosepiece is not correctly
mounted.
Attach the revolving nosepiece correctly.
The aperture iris diaphragm is not cen-
tered.
Center it.
The field iris diaphragm is stopped down
too far.
Open the field iris diaphragm until it
circumscribes the field.
The 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 an eyepiece.
Clean it thoroughly.
Dirt/dust on the specimen.
Dirt/dust on the objective top lens.
e) Visibility is poor.
Image is not sharp.
Contrast is poor.
The objective and/or eyepieces in use
are other than specified.
Use the specified objective and eye-
pieces.
Dirt/dust on specimen.
Clean it thoroughly.
Dirt/dust on objective top lens.
The aperture iris diaphragm is set im-
properly.
Set the aperture iris diaphragm prop-
erly.
f ) One side of image is blurred.
Image appears to waver.
The specimen is tilted.
Place specimen correctly.
The revolving nosepiece is not correctly
mounted.
Attach the revolving nosepiece correctly.
The light axis is tilted because a heavier
weight than restricted (3 kg) is applied to
the revolving nosepiece mount area.
Reduce the number of modules to re-
duce the weight below the restriction.
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