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7. Troubleshooting
In the period of using BK series microscope, if there is any trouble occurs, please
referring to the following sheet listed some common troubleshooting resolve them.
Trouble
Causation
Remedy
Switch on but bulb dark
Plug is unreliable
Plug in again
Bulb is broken
Change bulb
Fuse is broken
Change fuse
Bulb is flickering or
brightness is unsteady
Bulb is unstable
Insert it again
Bulb is broken
Replacing bulb
Brightness of view field
isn’t enough or is
Uneven
Bulb specification doesn’t
meet the requirement
Replacing bulb
Brightness isn’t adjusted
correctly
Adjust rotation
potentiometer
Objective isn’t in correct
position
Make the objective in correct
position
The size of iris aperture is too
small
Adjust the size of iris aperture
Brightness of view field
isn’t enough or is
Uneven
Lens (objective,eyepiece,
condenser, light collector) has
dust
Clean it
Position of condenser is too low Higher condenser
Image isn’t clear
(contrast or definition
isn’t enough)
Cover glass of specimen doesn’t
meet the
requirement
Use required thickness cover
glass (0.17mm)
Cover glass of specimen isn’t in
up direction
Place specimen correctly
Surface of objective lens
isdirty (especially it is easy for
the front lens of 40X objective
to dip in immersion oil)
Clean it
Immersion oil isn’t used for
100X objective (oil)
Use immersion oil
Immersion oil doesn’t meet the
requirement
Use immersion oil
supplied by us
There is bubble in immersion oil Clear the bubble way
Size of iris aperture isn’t
proper
Adjust the size of iris
aperture
Position of condenser is too low
Readjust the position of
condenser
One side of image is
dark or image is
moving as focusing
Objective isn’t in correct
position
Make the objective in
correct position
Specimen isn’t placed correctly
Place specimen levelly on
stage and clip it with clamp
Objective touches
specimen as changing
low times objective to
high times objective
Cover glass of specimen isn’t in
up direction
Place specimen correctly
Cover glass doesn’t meet the
requirement
Use required thickness
cover glass (0.17mm)
Image observed by two
eyes aren’t in
superposition entirely.
Interpupilary distance isn’t
adjusted correctly
Adjust interpupilary
distance according to two
eyes
It is easy for eyes to be
tired during observing
Diopter isn’t adjusted correctly Readjust diopter
