Optika Italy B-1000 Serie Mode D'emploi page 35

16. Troubleshooting
Review the information in the table below to troubleshoot operating problems.
PROBLEM
I. Optical Section:
LED does not light
LED operates, but field of view remains
dark
Field of view is obscured or not evenly
illuminated
Dirt or dust is visible in the field of view Dirt/dust on the specimen
Image looks double
Image quality is poor
• Image is not good;
• Contrast is poor;
• Details are indistinct;
• Image glares
One side of the image is unfocused
CAUSE
Power cord/supply is unplugged
Brightness is too low
DF selector on the reflected light illumi-
nator is inserted but no DF objectives
are available
Colour filter slider is in a wrong position Move to a click stop
Light path selector knob is set to the
camera position
Light path selector knob is set to the
camera position
Nosepiece is in an incorrect position
Condenser is not properly attached
Nosepiece is not properly attached
Condenser is not properly centred
Field diaphragm is stopped down too
far
DF selector on the reflected light illumi-
nator is inserted but no DF objectives
are available
Dirt/dust on the to surface of the con-
denser
Dirt/dust on the eyepieces
Aperture diaphragm is stopped down
too far
The field diaphragm (both for reflected
light and transmitted light) is not well
centred
Nosepiece is in an incorrect position
Aperture diaphragm is too closed or
too open
For reflected light observation, the
specimen must not have any cover-
glass
Focus is not even
Nosepiece is in an incorrect position
Nosepiece is not correctly mounted
Stage is not properly attached
Specimen is not correctly mounted on
the stage
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SOLUTION
Connect into the power outlet
Set brightness to a proper level
Move the selector to BF position
Move the selector to the eye position
Move the selector to the eye position
Move the nosepiece to a click stop
Re-attach it
Push the slide dovetail all the way until
it is stopped
Centre the condenser
Open the field diaphragm until it cir-
cumscribes the field of view
Move the selector to BF position
Clean thoroughly
Open aperture diaphragm
Set the diaphragm according to Koe-
hler settings
Move the nosepiece to a click stop
Adjust aperture diaphragm
Use specimens without coverglass
Slide holder is not flat. Move the speci-
men to a flat position
Move the nosepiece to a click stop
Push slide dovetail all the way until it
is stopped
Re-attach it
Place specimen correctly on the stage
and secure it with slide holder