2. Cleaning the objectives.
a. Do not remove the objectives from the microscope.
b. Only clean the outer surface, dampening a soft cotton cloth slightly with Xylene then
drying the lens with the same cloth.
3. Cleaning the condenser.
a. Clean only the top lens surface using either of the above methods, as for the eyepiece
or the objectives.
4. Cleaning the illuminator lens.
a. Use any of the above methods, as for the eyepiece or the objectives.
B. Electrical maintenance.
WARNING:
FOR YOUR OWN SAFETY SWITCH OFF, AND DISCONNECT THE MICROSCOPE
FROM ANY ELECTRICAL SOURCE, BEFORE ATTEMPTING ANY MAINTENANCE PROCEDURE
TO AVOID THE RISK OF ELECTROCUTION.
1. Changing the bulb.
a. Lift up the stage using the focusing knobs.
b. Unscrew the screws indicated. (Fig. 3)
c. Take out the top part of the illuminator carefully, without
damage the bulb, the condenser or the illuminator.
d. With carefully take out of the bulb and pull outwards to
disconnect it from the socket.
e. Do not touch the new bulb with bare hands. Use a clean
cloth to insert the bulb pins into the socket.
f.
If the bulb is touched with bare hands, it must be
cleaned, as the transmission of light could be affected.
g. Put on again the top part of the illuminator and tight the screws.
G. Mechanical maintenance
1. Adjusting the tension of the coarse focus knob.
The collar to adjust the coarse focus tension (Fig. 1) is situated between the coarse
focus knob (13) and the arm (10). The tension of the coarse focus knob comes pre
adjusted by the manufacturer. The optimum tension point is that which permits fluid
movement of the knobs, without the stage (6) sliding down on its own.
a. To adjust the tension, first loosen the screw situated in one of the collar holes, with
a 2mm hexagonal key.
b. To tighten the tension of the coarse focus knobs, turn the collar anti-clockwise; or
to loosen it, turn clockwise.
c. Tighten the hexagonal screw.
-7-
Fig. 2
