7
Mechanical System
Problem
Possible Cause
Solution
Having trouble focusing when
using high magnification objective.
Objective touches cover glass while
turning the nosepiece
Coarse Focusing Knob is too tight
Stage drifts and will not stay in the
focal plane
Slide does not move smoothly
The image moves considerably
when touching the stage
Cover glass is facing down.
Cover glass is too thick.
Cover glass faces down
Cover glass is too thick
Tension Adjustment Knob is too tight
Tension adjustment knob is too loose
The slide is not positioned correctly
The moveable specimen holder is not
fixed properly
The stage is fashioned incorrectly
Make sure cover glass is facing up.
Use a standard cover glass with a thickness
of 0.13-0.17mm
Turn the nosepiece into the right position until
you hear it click into place
Clean the appropriate lenses
Loosen it to an appropriate position
Tighten it to an appropriate position
Adjust it correctly
Adjust it correctly
Fasten the stage correctly
Electrical System
Problem
Possible Cause
Solution
Bulb does not work
Bulb burns out quickly
The field of view is not bright
enough
No power supply
Bulb is not installed correctly
Bulb is burnt out
Wrong bulb is being used
Wrong bulb being used
Light adjustment knob is not being
used correctly
Check connection of power cable
Install bulb correctly
Replace bulb
Replace with correct bulb
Replace with correct bulb
Adjust knob correctly
