Nikon SC - Troubleshooting Guide; Optical System Issues

V. TROUBLE SHOOTING CHART
If any trouble cited below occurs, take appropriate action, referring to the following
chart, before requesting our repair service.
1. Optical system
Failures
Causes-
Actions
Cutting off or un¬
even brightness of
viewfield
• Revolving nosepiece is not correctly set;
) objective is out of optical path
, • Condenser is not raised to its limit-
• Lamp bulb is not correctly inserted-
, • Lens surfaces of condenser, objective,—
I and/or eyepiece are not clean
• Surface of lamp bulb is not clean-
Reset the nosepiece
(with click)
Raise the condenser
Insert the lamp bulb
correctly
Clean the lens surfaces
Clean the bulb surface
Oirt is seen in the
viewfield
Dirt or dust on the lens surfaces of con¬
denser. objective and/or eyepiece
Dirt on the specimen-
Clean the lens surface
Remove the dirt
Poor image (too low
contrast and/or re¬
solving power)
• No coverglass is used on the specimen-
• Immersion oil is smeared on the objective •
of a dry-system (40X objective is liable to
accept oil)
• No immersion oil is applied to the end of-
I 10OX objective
• Air bubbles enter the oil layer-
• Too thick specimen is observed-
• Too thick coverglass is used-
Unspecified immersion oil is used"
Too large opening of condenser diaphragm •
Place a coverglass
Clean off the oil
Apply immersion oil
Remove the air bubbles
Use a thinner specimen
Use a coverglass of
standard thickness 0.17
mm
Apply Nikon Immer¬
sion oil
Close the diaphragm
properly
I Image shows poor Condenser diaphragm is excessively closed-
details for too much
contrast
Open the diaphragm
properly
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