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TROUBLESHOOTING
PROBLEM
Light fails to operate.
Image does not focus
Poor resolution
(Image not sharp)
Spots in field of view.
OPTIONAL ACCESSORIES AND PARTS:
#800-001
Replacement LED light
#801-160
Replacement fuse, 0.5 amps, time delay.
WARRANTY - 5 YEAR LIMITED WARRANTY
Please see our website, www.nationaloptical.com, for complete warranty details and exclusions.
REASON FOR PROBLEM
Light switch in off position.
Fuse blown.
LED bulb burned out.
Disc diaphragm has not "clicked"
into proper position and is
blocking light source beneath
stage.
Cover slip on specimen slide too
thick.
Slide upside down.
Objective lenses dirty.
Eyepiece lens dirty.
Too much light.
Eyepiece lens dirty.
Specimen slide dirty.
6
SOLUTION
Turn light switch on.
Replace fuse.
Replace LED.
Turn disc diaphragm until it "clicks" into
position.
Use 0.17mm thick cover slip.
(No. 1 cover slip)
Place slide on stage with cover slip
facing up.
Clean objective lenses.
Clean eyepiece lenses.
Adjust disc diaphragm
Clean eyepiece lenses.
Clean slide.
(11/28/06)
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