Common Issues (Continued)
Symptom Cause Remedy
OPTICAL ISSUES
The color of the image is
not accurate
The brightness adjustment knob is not in the right position Adjust the brightness knob to a higher or lower setting for color
clarity
No filter is used or filter is in use Remove color filter if natural light is desired, or insert desired
filter
MECHANICAL ISSUES
The objective touches the
cover slip
The cover slip is not standard sized (2L model, biological
sample only)
Replace the cover slip with the appropriate 0.17mm thickness slip
Unable to move the slide
smoothly
The slide is not secured correctly Adjust the slide to use the stage clips and secure the sample
The mechanical stage is not properly secured Tighten the mechanical stage screws to better secure the stage
Focus knob does not turn
The 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 right of the microscope)
Stage declines by itself
The 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 right
of the microscope)
ELECTRICAL ISSUES
The bulb/light source
flickers
The bulb is close to burning out Replace the bulb.
The microscope does not
light up
The microscope is unplugged Insert the plug into the wall socket to achieve electrical illumina-
tion
The bulb is not inserted correctly Check the bulb by unscrewing the base (remove eyepieces first to
prevent falling out) door and ensuring that the bulb is inserted
The bulb burned out
Replace the bulb. This unit uses our BH-6V20W with our 20w
unit, or our BH-6V30W for the 30W unit.
The fuse burned out Replace with fuse on the bottom of the microscope
The fuse burns out fre-
quently
The voltage is too high Use the correct power supply (110v if 110v unit, 220v if 220v
unit), or get a voltage adapter to convert to the proper electrical
system
The bulb burns out fre-
quently
The voltage is too high Use the correct power supply (110v if 110v unit, 220v if 220v
unit), or get a voltage adapter to convert to the proper electrical
system
Used the wrong bulb Use the correct wattage bulb for the unit. Using a higher wattage
than it is rated for can damage your unit (melt components with
additional heat), so please be sure to use the correct one. Damage
from incorrect usage is not covered under warranty.
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