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VI. TROUBLESHOOTING
VI. TROUBLESHOOTING
SEEING AND OPERATION
Failures
Causes
Actions
Optical path In trinocular tube not
fully changed.
Changeover the optical
path securely to
Optical path In trlnocular tube not
binocular observation
changed-over for binocular
tube.
(p.24)
observation.
Revolving nosepiece not In
Revolve It to click-stop
click-stop position (objective not
position (put objective
centered In optical-path).
Into optical path). (p.12)
Position correctly so the
Condenser IS too low.
vlewfleld diaphragm
Image IS formed.
(p22)
Darkness at the
Condenser not centered.
Centering.
(p 22)
periphery.
Condenser not mounted correctly.
Mount correctly.
(p.6)
Uneven
NO filter not fully changed-over.
Changeover to the limit.
brightness of
viewfield.
Field diaphragm closed too much.
Open properly.
(p.24)
No appearance
Improper combination of objective
Use proper combination.
of viewfield.
and condenser.
Dirt or dust on the lens (field lens.
condenser, objective, eyepiece.
Cleaning.
(p.ll)
eyepiece tu be entrance lens) or
specimen.
Lamp not mounted correctly.
Mount properly
(p.5)
Bertrand lens In optical path.
Remove out of the
optical path.
(p.18)
Top lens of the condenser not fully
Swing In or out to the
swung-out/ln .
limit.
(p.19)
1/4)" & tint plate or compensator
I nsert properly.
(p 19)
not In correct position.
35
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