If you are unable to obtain optimum performance from your microscope, please consult the table below for
trouble shooting.
1. Optical system
a) Switching on light source, field Bulb socket cord is not connected.
Connect the cord to receptacle on
of view is still dark. the microscope stand.
Bulb is burned out. Replace.
Sliding voltage control lever is set at Set it at higher voltage position.
to0
low a position.
Bulb is not centered.
Center it.
Condenser holder is not clamped in
Clamp it.
place.
Condenser is not in correct position.
Adjust condenser height until field
diaphragm image is formed in speci-
men plane.
Condenser is not centered.
Center it until field diaphragm
image comes in the center.
Nosepiece is not clicked in place.
Rotate it slightly until it clicks in
place.
Light path selector knob is at the
Set knob to the BI position or in-
OM or MTU position. crease bulb voltage.
Too many filters are engaged.
Reduce number of filters.
Stage insert plate blocks light path.
Remove stage and reset specimen.
Fuse is burned out.
Check electric circuit and after re-
moval of cause, replace fuse.
Line voltage selector switch is not Adjust switch correctly.
set to conform with local mains
voltage.
b) Field of view is cut off at the Light path selector knob is stopped Click knob into place according to
periphery or illuminated uneven-
midway.
purpose.
IY.
Nosepiece and magnification
Click them into place.
changer are not positioned correct-
ly.
Condenser turret is not correctly
Click turret into place.
Condenser is not positioned or Click condenser turret Into place or
centered correctly. center correctly.
Light source is not centered.
Center light source.
Filter is stopped midway. Pull or push it completely.
c) Dust or dirt is visible in field of
Dirty specimen.
Clean slide or culture vessel.
view.
Dust on eyepiece.
Clean eyepiece.
Condenser is not correctly posi- Adjust condenser height until field
tioned and the frosted filter is in diaphragm image is formed on spe-
focus. cimen plane.
positioned.
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