BestScope International Limited
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dust affect bulb brightness and service life, and insert fully the contact pins into the bulb socket.
6.3.6 Close the lamp housing cover, and screw the knurled thumb screw.
▲
After working for above 10 hours continuously,
better cut off the microscope about 30 minutes.
6.4 Replacement of fuse
6.4.1 Cut off power of microscope, and pull out the
plug.
6.4.2 Unscrew fuse cap in the back of base, take out
old fuse.
6.4.3 Replace a new fuse, then screw the fuse cap.
7. Trouble shooting
In the period of using this 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 e
nough 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
