17
150 Series
Troubleshooting
Common Issues (Continued)
Symptom Cause Remedy
OPTICAL ISSUES
e color of the image is
not accurate
e brightness adjustment knob is not in the right position Adjust the brightness knob to a higher or lower setting for color
clarity
No lter is used or lter is in use Remove color lter if natural light is desired, or insert desired
lter
MECHANICAL ISSUES
e objective touches the
cover slip
e cover slip is not standard sized Replace the cover slip with the appropriate 0.17mm thickness slip
e limit-stop is set too high or not engaged Be careful to avoid contact between objective and the slide when
the limit stop is not engaged. To reengage, focus the sample, then
lock the limit stop into place to set max height at a safe but us-
able distance.
Unable to move the slide
smoothly
e slide is not secured correctly Adjust the slide to use the stage clips and secure the sample
e mechanical stage is not properly secured Tighten the mechanical stage screws to better secure the stage
Focus knob does not turn e tension knob is too tight Loosen it by adjusting the tension ring inside the coarse focus
knob counterclockwise (close to the arm of the microscope on
the le of the microscope)
Stage declines by itself e tension knob is too lose Tighten it by adjusting the tension ring inside the coarse focus
knob clockwise (close to the arm of the microscope on the le
of the microscope)
e focusing knob won’t
raise the stage
Limit-stop is engaged Disengage the limit stop on the rear of the stage of the micro-
scope
ELECTRICAL ISSUES
e bulb/light source
ickers
e bulb is close to burning out Please contact us in regards to this issue. LED lights do not burn
out, so there may be another electrical issue
e microscope does not
light up
e microscope is unplugged Insert the plug into the wall socket to achieve electrical illumina-
tion
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