Troubleshooting - JC LAB Bimc-12N1000 Operation Manual

8.0 Troubleshooting

Review the information in the table below to troubleshoot operating problems.
PROBLEM
I. Optical Section:
LED operates, but field of view remains dark. Battery is lower.
Dirt or dust is visible in the field of view.
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. Observation tube
Field of view of one eye does not match that
of the other.
IV. Microphotography
Image edge is unfocused
Bright spots appear on the image
CAUSE
Brightness is too low
Dirt/dust on the specimen
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,
objectives, eyepieces and slide)
For transmitted light observation,
the coverglass thickness must not
exceed 0.17mm
Focus is not even
The nosepiece is not in the center
of the light path
The specimen is out of place (tilted) Place the specimen flat on the stage.
The optical performance of the
sample cover glass is poor
The tension adjustment collar is
too tight
The tension adjustment collar is
too loose
Interpupillary distance is incorrect.
Incorrect diopter adjustment.
To a certain extent it is due to
achromatic objectives features
Stray light entering in the
microscope through eyepieces or
camera viewfinder.
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SOLUTION
Plug Power supply to charge the microscope
Set brightness to a proper level
Clean the specimen
Clean the eyepieces
Open aperture diaphragm
Move the nosepiece to a click stop
Adjust aperture diaphragm
Clean thoroughly
Use a coverglass with thickness 0.17mm
Slide holder is not flat. Move the specimen to a
flat position
Turn the nosepiece to a click stop
Use a cover glass of better quality
Loosen the tension adjustment collar
Tighten the tension adjustment collar
Adjust interpupillary distance.
Adjust diopter.
To minimize the problem, set the aperture
diaphragm in a proper position
Cover eyepieces and viewfinder with a dark
cloth