10
5. Troubleshooting
In the period of using microscope, if there is any trouble occurs, please referring to the following sheet
listed some common troubleshooting resolve them.
Trouble
Causation
Remedy
Bulb is dark when switch on
power.
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 potentiometer .
Objective isn’t in correct position.
Make the objective in correct
position.
The size of aperture diaphragm is
too small.
Readjust aperture diaphragm .
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
Is dirty (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 aperture diaphragm isn’t
right.
Readjust aperture diaphragm.
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.
