Troubleshooting; Viewing And Control Systems - Nikon eclipse lv150 Instruction Manual

Troubleshooting

Improper use of the microscope may adversely affect its performance even though there is no damage on itself.
If any of the problems listed below arises, take the countermeasures indicated.
1

Viewing and control systems

Problems
The viewfield is
invisible, vignetted, or
uneven in brightness
Dirt or dust in the
viewfield
Uneven focus
66
Cause
Lamp not properly installed.
Optical path selection lever on the
eyepiece tube is in an intermediate
position.
Optical path selection lever on the
eyepiece tube is not set to 100% (or
20%) binocular eyepiece.
Filter slider is in an intermediate
position.
Field diaphragm is stopped down too
far.
Nosepiece is not properly installed.
Nosepiece is not rotated to a clickstop
position. (Objective is not in the optical
path.)
Dummy, DIC, polarizer, lambda plate,
or analyzer slider is in an intermediate
position.
Bright/dark-field illumination selection
lever (for LV-UEPI), or microscopy
selection knob (for LV-UEPI22), is in
an intermediate position.
Microscopy selection knob is at "S"
position (when LV-UEPI2 is used).
Filter cube is not set in place or is
attached to a wrong position (when LV-
UEPI2 is used for epi-fl microscopy).
A wrong filter cube is selected (when
LV-UEPI2 is used for epi-fl
microscopy).
Aperture diaphragm is stopped down
too far.
Dirt or dust on the lens, eyepiece, filter,
or sample.
Nosepiece is not properly installed.
Nosepiece is not rotated to a clickstop
position.
Sample holder is slanted.
Countermeasures
Install it securely.
Set the optical path selection lever to
100% (or 20%) binocular eyepiece.
Move it to a clickstop position.
Open to a suitable size.
Install it securely.
Rotate to a clickstop position. (Place
the objective in the optical path.)
Move it to a clickstop position.
Push in, or pull out, the lever to the
limit. Set the knob to a clickstop
position.
Change to a microscopy position. (p.33)
Attach it to the correct position. (p.52)
Select the appropriate filter cube.
Open to a suitable size.
Clean it.
Install it securely.
Rotate to a clickstop position.
Mount it securely.
(p.53 to 55)
(p.29)
(p.26)
(p.31)
(p.49)
(p.36 to 39)
(P.33)
(p.40 to 42)
(p.32)
(p.70)
(p.49)
(p.48)