Chapter 4
Troubleshooting
68
Chapter 4
T
roubleshooting
Problem
Cause
Measure
Lens and specimen are dirty or dusty.
Check and clean by following the procedure in
“If dirt or dust does not turn by rotating the
eyepiece” in “When looking into the eyepiece,
dirty or dusty field of view”.
An aperture diaphragm is stopped down
too far. Otherwise, it is open too much.
Open it to proper size.
(
→
Chapter 2 “6 Adjusting the Aperture Diaphragm”)
Field diaphragm image is not focused on
the specimen surface.
(Condenser is not correctly adjusted.)
Make sure the condenser is focused and
centered.
(
→
Chapter 2, “5 Focusing and Centering the
Condenser”.)
No immersion oil is applied to the tip of an
oil-immersion objective.
The designated immersion oil is not used.
Apply our designated non-fluorescent
immersion oil.
(
→
Chapter 2 “12 Oil Immersion”)
The immersion oil contains air bubbles.
Remove the air bubbles.
(
→
Chapter 2 “12 Oil Immersion”)
Image quality is poor.
Contrast is poor.
Resolution is poor.
Immersion oil adhering to the tip of the
dry-type objective.
Clean it as appropriate.
(
→
Chapter 2 “12 Oil Immersion”)
ND filters are out of the optical path.
Place ND filters in the optical path.
(
→
Chapter 2 “1.2 Adjustment with ND Filters”)
Field of view is too
bright.
The lamp voltage is too high.
Turn the brightness control knob to the
mark position and adjust the brightness with
ND filters.
(
→
Chapter 2, “1 Adjusting the Brightness of a
Diascopic Image”)
Lamp voltage is too low.
Turn the brightness control knob to the
mark position and adjust the brightness with
ND filters.
(
→
Chapter 2, “1 Adjusting the Brightness of a
Diascopic Image”)
Condenser aperture diaphragm is stopped
down too far.
This should normally be adjusted to 70 to 80%
of numerical aperture of the objective.
(
→
Chapter 2 “6 Adjusting the Aperture Diaphragm”)
Field diaphragm image is not focused on
the specimen surface.
Make sure the condenser is focused and
centered.
(
→
Chapter 2, “5 Focusing and Centering the
Condenser”.)
Optical path is not switched to binocular
100%.
Set to binocular 100%.
(
→
Chapter 2, “9 Switching the Optical Path of the
Tube”)
Field of view is too dark.
The lamp has reached the end of its
product life (for Ci-S).
Replace the lamp.
(
→
Chapter 5 “1 Replacing the Lamp (for Ci-S)”)
Image is yellowish or
very bluish.
Lamp voltage is too low or too high. (for
Ci-S)
Turn the brightness control knob to the
mark position and adjust the brightness with
ND filters.
(
→
Chapter 2, “1 Adjusting the Brightness of a
Diascopic Image”)
Color of the image
visible to the naked eye
is different from that of
the image displayed on
the monitor.
White balance of the camera is not set
properly.
Set the white balance according to camera's
instruction manual.