4
PROBLEM
POSSIBLE CAUSE
Dust or dirt in field of view.
Dust or dirt on objective, illuminator or
eyepiece.
Double Image
Interpupillary distance is not set correctly.
Diopter adjustment not set on eyepieces.
Two different eyepieces are being used.
Sample blurs when magnification changes.
Diopter adjustment is not set properly on
eyepieces.
Specimen is not properly in focus.
Focusing is loose or too tight.
Adjust tension adjustment knob on the side of
the microscope next to the focusing knob.
TROUBLESHOOTING: Optical
TROUBLESHOOTING: Electrical
PROBLEM
POSSIBLE CAUSE
Lamp does not turn on and light up.
Power cord not plugged in, or batteries are
not charged.
Light is burned out.
Inadequate brightness.
Rheostat knob needs adjustment.
Lamp blows out immediately.
Incorrect bulb being used.
Lamp flickers.
Connector wires are not secured.
Lamp near end of life.
Lamp not securely plugged into socket.
