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Troubleshooting
If you experience difficulty with your microscope, try these troubleshooting techniques:
Problem
Possible Reason and Solution
Light fails to
operate
1.
The AC power cord is not connected.
Connect the cord to an outlet.
2.
The bulb is burned out.
Replace the bulb. (See “Changing the Bulb,” p. 6.)
3.
The power source outlet is inoperative.
Have a qualified electrician repair the outlet.
4.
The incorrect bulb is installed.
Replace with the correct bulb.
Light flickers
1.
The bulb is not properly inserted into the socket.
Properly insert the bulb.
2.
The bulb is about to burn out.
Replace the bulb.
3.
The connection at the AC outlet is loose.
Have a qualified electrician repair the outlet.
Note: The fluorescent bulb typically flickers for 10 to 15 seconds when first turned on.
This is normal.
No image
1.
The nosepiece is not indexed properly.
Move revolving nosepiece until the objective
lens clicks into position.
2.
The light is too bright.
Adjust the diaphragm.
Unable to
focus slide
1.
The slide coverslip is too thick.
Use 0.17 mm thick (No. 1) coverslip.
2.
The stage drops under its own weight.
Adjust tension of coarse focus knob.
(See
“Adjusting Tension,” p. 6.)
3.
The slide is upside down.
Place the slide on the stage with the coverslip facing up.
4.
The stage stop is not set at the proper position.
Adjust the stage stop. (See
“Adjusting the Stage Stop,” p. 6.)
Poor
resolution,
image not
sharp
1.
The condenser, objective, or eyepiece lenses are dirty.
Clean the lenses. (See
“Cleaning,” p. 2.)
2.
There is too much light.
Adjust the diaphragm.
Spots in field
1.
The condenser, objective, or eyepiece lenses are dirty.
Clean the lenses. (See
“Cleaning,” p. 2.)
2.
The specimen slide is dirty.
Clean the slide.
Uneven
illumination of
field
1.
The nosepiece is not indexed properly.
Move revolving nosepiece until the objective
lens clicks into position.
2.
The diaphragm is not properly indexed.
Adjust the diaphragm to the proper level.
