12. Problem solving
Problem
Solution
Check the unit is fully charged
No illumination,
Check the position of the filters and
or low
slits to ensure they are set correctly
illumination
Check and if necessary change
the bulb
Slit slanted at an
Check the position of the slit disc, it
may not be located correctly at a slit
angle
position
Circle incomplete
Check the position of the slit and
filter discs, it may not be located
or offset
correctly at a slit position
Poor focus
Check the dioptric settings of the
eyepieces
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