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5.
Cleaning condenser lens.
Clean only the top lens surface, visible when looking through hole in top of stage. Use same procedure
as used for eyepiece or objective lenses.
6.
Illuminator condenser lens.
Use same procedure as used for eyepiece or objective lenses.
B.
ELECTRICAL MAINTENANCE
WARNING: FOR YOUR SAFETY, TURN SWITCH OFF AND REMOVE PLUG FROM POWER SOURCE
OUTLET BEFORE MAINTAINING YOUR MICROSCOPE.
1.
Replacement of lamp.
a.
Carefully lay instrument on its side, taking care to avoid damage to the specimen slide holder
located on top of mechanical stage.
b.
Loosen large chrome locking screw located on hinged door of illuminator base.
c.
Swing door open to expose the halogen lamp.
d.
Using a tissue or cloth to gently grasp the halogen bulb, pull straight out of lamp socket.
e.
Your microscope requires a 12 volt, 20 watt halogen bulb, available from the dealer from which you
purchased your microscope. This is a common microscope bulb, Osram #64425.
f.
Make certain that new bulb is clean, as fingerprints on bulb can affect light transmission. Grasping
bulb gently with a tissue or cloth, insert pins straight into lamp socket.
g.
Carefully clean lamp to assure that it is clean and free of all fingerprints.
h.
Close hinged door and tighten locking screw.
2.
Replacement of fuse (National #801-160).
The fuse is located at right rear side of microscope base. To remove fuse from holder, insert a 6mm
screwdriver blade into slot located in rear of fuse cap. Slightly depress and rotate screwdriver ¼ turn in
direction of arrow, release pressure on screwdriver to release the fuse cap. Pull cap and fuse out of
fuse holder. Insert proper 0.5 amp time delay fuse into fuse cap. Insert fuse cap into fuse holder. Using
screwdriver rotate fuse cap assembly in opposite direction of arrow until guide slot engages, depress
fuse cap and rotate ¼ turn to lock into fuse holder.
9
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