OPTO-EDU A15.2604, Manual

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5. Troubleshooting
If there is any trouble occurs in operation, please referring to the following sheet listed
some common troubleshooting resolve them or keep in touch with us or local agency .
Trouble Causation Remedy
Switch on but bulb
dark
Plug is unreliable Check joint again
Bulb is broken Replace bulb
Fuse is broken Replace fuse
Bulb is flickering
or brightness is
unsteady.
Bulb is unstable Insert again
Bulb is broken Replace bulb
Brightness of view
field isn’t enough
or is uneven.
Bulb specification doesn’t
meet the requirement.
Replace bulb
Bulb brightness is low. Rotate potentiometer to adjusting brightness.
Objective isn’t in correct optical path. Rotate the objective in correct position.
The size of iris aperture is too
Small.
Adjust the size of iris aperture.
Lens (objective, eyepiece,
condenser, light collector) has dust
Wipe Clean .
Position of Condenser is too low Adjust condenser properly.
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.
There is bubble in immersion oil Clear the bubble away
Size of iris aperture isn’t
proper
Adjust the size of iris aperture.
Position of condenser is too low Readjust again
One side of image
is dark or image is
moving as
focusing.
Objective isn’t in correct
optical path.
Make the objective in correct position.
Specimen isn’t placed correctly.
Place specimen levelly on stage and clip it
with clamp.
Objective touching
specimen as
changing low
power to high
power
Cover glass of specimen
doesn’t meet the requirement.
Place specimen correctly.
Cover glass is too thick. Use required thickness cover glass (0.17mm).
It is easy for eyes
to be tired during
observing.
Illumination brightness isn’t enough. Adjust brightness
Diopter isn’t adjusted correctly. Adjust diopter
Contrast isn’t enough Adjust aperture diaphragm.