Optica B-380 Serie Manual De Instrucciones página 35

II. Mechanical Section:
Coarse focus knob is hard to turn
Focus is unstable
III. Electrical Section
LED doesn't turn on.
Brightness is not enough
Light blinks
IV. Observation tube
Field of view of one eye does not
match that of the other.
V. Microphotography
Image edge is unfocused
Bright spots appear on the image
Tension adjustment ring is too
tight
Tension adjustment ring is too
loose
Power supply not connected
Brightness setting is too low
Power supply not well con-
nected
Interpupillary distance is incor-
rect.
Incorrect diopter adjustment.
Your view is not accustomed to
microscope observation.
To a certain extent it is due to
achromatic objectives features
Stray light entering in the micro-
scope through eyepieces or
camera viewfinder
Page 35
Loosen tension adjustment ring
Tighten tension adjustment ring
Check for proper connection
Adjust brightness
Check for proper connection
Adjust interpupillary distance.
Adjust diopter.
Upon looking into eyepieces, try looking 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.
To minimize the problem, set the aperture
diaphragm in a proper position
Cover eyepieces and viewfinder with a
dark cloth