Optika Italy B-150R-PL Serie Manuel D'instructions page 17

11. Troubleshooting
Review the information in the table below to troubleshoot operating problems.
PROBLEM
I. Optical Section:
LED operates, but field of view remains
dark
Dirt or dust is visible in the field of view Dirt/dust on the specimen
Image looks double
Visibility is poor.
• Image is not good
• Contrast is poor
• Details are indistinct
• Image glares
One side of the image is out of focus
II. Mechanical Section:
The coarse focus knob is hard to turn
The focus is unstable
III. Electric section:
The LED doesn't turn on
The brightness is not enough
The light blinks
IV. Observation tube:
Field of view of one eye does not match
that of the other
CAUSE
Power supply is unplugged
Brightness is too low
Batteries are uncharged
Dirt/dust on the eyepieces
Aperture diaphragm is stopped down
too far
Revolving nosepiece is in an incorrect
position
Aperture diaphragm is too closed or to
open
Dust or dirt on lenses (condenser, ob-
jectives, eyepieces and slide)
The nosepiece is not in the center of
the light path
The specimen is out of place (tilted)
The optical performance of the sample
cover glass is poor
The tension adjustment collar is too
tight
The tension adjustment collar is too
loose
No power supply
Batteries are uncharged
The brightness adjustment is low
The power cord is poorly connected
Interpupillary distance is incorrect
Incorrect diopter adjustment
Your view is not accustomed to micro-
scope observation
Page 17
SOLUTION
Connect
Set brightness to a proper level
Fully charge the batteries
Clean the specimen
Clean the eyepieces
Open aperture diaphragm
Move the nosepiece to a click stop
Adjust aperture diaphragm
Clean thoroughly
Turn the nosepiece to a click stop
Place the specimen flat on the stage
Use a cover glass of better quality
Loosen the tension adjustment collar
Tighten the tension adjustment collar
Check the power cord connection
Fully charge the batteries
Adjust the brightness
Check the power cord
Adjust interpupillary distance
Adjust diopter
Upon looking into eyepieces, try look-
ing at overall field before concentrating
on specimen range. You may also find
it helpful to look up and into distance
for a moment before looking back into
microscope