14
8. Trouble shooting
MRJ
Symptom Cause
Remedy
Mechanics
The cover glass faces down.
Put the cover glass to face up.
(1)Can not get the
objective focused.
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.
(3)Coarse focusing
knob is too tight.
Tension knob is too tight.
Loosen a little.
(4)Stage declines
itself and can’t stay in
the focus plane.
Tension knob is too loose. Tighten
a
little.
(5)Coarse focusing
knob can’t rise.
The limit stop knob is locked.
Loosen the knob.
(6)Coarse focusing
knob can’t decline.
The base of the condenser is too low.
Raise the base.
The slide is not fixed correctly.
Adjust it correctly.
(7)Can not move the
slide smoothly.
The movable specimen holder is not fixed
properly.
Adjust it correctly.
(8)The image moves
obviously when
touching the stage.
The stage is fastened incorrectly.
Fasten the stage correctly.
Electrical
No power supply.
Check the connection of the
power cable.
The bulb is not inserted correctly.
Insert it correctly.
(1)The bulb does not
work.
The bulb burnt out.
Replace it.
(2)The bulb burnt out
usually.
Use a wrong bulb.
Replace with a correct one.
Use a wrong bulb.
Replace with a correct one.
(3)The field of view is
not bright enough.
The use of light adjustment knob is wrong.
Adjust correctly.
The bulb will burn out soon.
Replace with a new one.
(4)The bulb flickers
or the brightness is
not stable.
The wire doesn’t connect all right.
Connect correctly.
