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Common Issues (Continued)
Symptom Cause Remedy
OPTICAL ISSUES
Image color is not correct
No filter is used or filter is in use Remove color filter if natural light is desired, or insert desired
filter
The condenser height is not correct Adjust the condenser height with the knob to the left of the mi-
croscope underneath the stage
MECHANICAL ISSUES
The objective touches the
cover slip
The cover slip is not standard sized Replace the cover slip with the appropriate 0.17mm thickness slip
The 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 (unless using the 100x objective
with oil). To reengage, focus the sample, then lock the limit stop
into place to set max height at a safe but usable distance.
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
The coarse focusing knob
won’t raise the stage
Limit-stop is engaged Disengage the limit stop on the rear of the stage
The fine focusing knob
won’t raise the stage
Limit-stop is engaged Disengage the limit stop on the rear of the stage
ELECTRICAL ISSUES
The bulb/light source
flickers
The bulb is close to burning out (halogen only) Replace the bulb. This unit uses our model BH-6V15W.
The circuit board is malfunctioning (LED only)
Contact us to request a repair/replacement
The microscope does not
light up
The microscope is unplugged Insert the plug into the wall socket to achieve elec
trical illumina-
tion
The bulb is not inserted correctly (halogen only) 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 (halogen only) Replace the bulb. This unit uses our model BH-12V20W.
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 (halogen only) 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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