6.Troubleshooting
N2 SERIES
Symptom
Cause
Remedy
Optics
The brightness-
adjustment-
knob is not in the right
position.
Adjust the brightness-
adjustment-knob.
(6)The image color is
not true.
No filter is used.
Use correct filter.
Mechanics
The cover glass faces
down.
Put the cover glass to face up.
(1)The image is not
focused while using
high power objective.
The cover glass is not
standard.
Use a standard cover glass with
thickness 0.17mm.
The cover glass faces
down.
Put the cover glass to face up.
(2)The objective
touches the cover glass
while turning the
nosepiece.
The cover glass is not
standard.
Use a standard cover glass with
thickness 0.17mm.
The slide is not fixed
correctly.
Adjust it correctly.
(3)Can not move the
slide smoothly.
The movable specimen
holder is not fixed
properly.
Tighten it.
(4)Focus-knob is not
flexible.
Tension knob is too
tight.
Loosen it a little.
(5)The stage declines
itself to make the
image unclear.
Tension knob is too
loose.
Tighten it a little.
(6)When focusing up,
the coarse-focusing-
knob can not rotate.
Limit-stop–knob
locked.
Loosen the limit-stop-knob and
lock it after refocusing.
Electrics
No power supply.
Check the connection of the
power cable.
The bulb is not inserted
correctly.
Insert it correctly.
The bulb burnt out.
Replace it.
(1)The bulb does not
work.
The fuse burnt out.
Replace it.
The voltage is too high.
Use correct power supply.
(2)The bulb burnt out
usually.
Use a wrong bulb.
Replace with a correct one.
