25
TROUBLESHOOTING
PROBLEM
REASON FOR PROBLEM
SOLUTION
A light fails to operate.
Items not properly connected
Check all electrical connections
from
AC
wall
outlet
to
microscope input.
Switches not in proper position.
Check switches and intensity
controls.
Transmitted LED bulb burned out.
Incidental LED bulb burned out.
Replace LED bulb
Send lamp assembly to National
for bulb replacement.
Image does not remain
in focus
Head of microscope drops from its own
weight.
Adjust tension control.
Poor resolution (image
not sharp)
Objective lenses dirty.
Clean objective lenses.
Eyepiece lens dirty.
Clean eyepiece lenses.
Spots in field of view.
Eyepiece lens dirty.
Clean eyepiece lenses. ***
***Spots in field of view can also result from dirt on the inside of the eyepiece. It is recommended that
you have service technician clean inside of lens.
