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8.0 TROUBLESHOOTING
6. One side of the image
is out of focus.
The nosepiece is not in the cen-
ter of the light path
Turn the nosepiece to a click stop
The specimen is out of place
(tilted)
Place the specimen flat on the stage.
The optical performance of the
sample cover glass is poor
Use a cover glass of better quality
II. Mechanical section
1.The coarse focus knob
is hard to turn.
The tension adjustment collar is
too tight
Loosen the tension adjustment collar
2.The focus is unstable.
The tension adjustment collar is
too loose
Tighten the tension adjustment collar
III. Electric section
1. The LED doesn’t turn
on.
No power supply
Check the power cord connection
2. The brightness is not
enought
The brightness adjustment is low Adjust the brightness
3. The light blinks
The power cord is poorly con
-
nected
Check the power cord
IV. Viewing tube assembly
The field of view of the
two eyes is different.
The interpupillar distance is not
correct
Adjust the interpupillar distance
The dioptric correction is not
right
Adjust the dioptric correction
The viewing technique is not cor
-
rect, and the operator is straining
the eyesight
When look into the objective, do not stare at
the specimen but look at the whole field of
view. Periodically, move the eyes away to
look at a distant object, then back into the
objective
V. Microphotography and video
1. The image is unfocu
-
sed.
Incorrect focusing
Adjusting the focus system as in the present
manual
2. The edge of the image
is unfocused.
To some degree, it is inherent to
the nature of achromatic objec
-
tives
The problem can be minimized by a correct
setting of the aperture diaphragm
3. Bright patches appear
on the image.
Stray light is entering the micro
-
scope through the eyepieces
and through the camera viewfin
-
der
Cover the eyepieces and the viewfinder with
a dark cloth
