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Home Training Tools Ltd. 2012
Page 7 of 8
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Pull bulb straight out
Tension collar
4.
Loosen the locking screw on the hinged
door and swing the door open.
5.
Gently grasp the halogen bulb. Pull it
straight out of the lamp socket.
6.
Use a tissue or cloth to grasp the new bulb.
Insert it straight into the lamp socket, then
close the door and tighten the locking screw.
Adjusting Tension
While the coarse focus
tension is pre-adjusted by
the manufacturer, if it falls
out of adjustment, the stage
will drift down under its own
weight moving the image out
of focus. To tighten tension,
turn the collar clockwise.
1.
Leave the tension as loose as possible.
Tighten only enough to keep the stage from
drifting downward.
Replacing the Fuse
If your microscope light flickers or fails to
operate, the fuse may be burned out or not
locked into position. To change the fuse, follow
these steps:
1.
Obtain the appropriate T1L 250
volt replacement fuse.
2.
Lay the microscope carefully on
its side.
3.
Unscrew the fuse holder on the bottom of
the microscope.
4.
Pull the fuse straight out from the socket and
replace with a new one.
5.
Screw the fuse holder back in.
Troubleshooting
If you experience difficulty with your microscope, try these troubleshooting techniques:
Problem
Possible Reason and Solution
Light fails to
operate
1.
The AC power cord is not connected.
Make sure the cord is fully connected to the
socket on the microscope. Connect the cord to an outlet.
2.
The bulb is burned out.
Replace the bulb. (See ‘‘Changing the Bulb,’’ p. 7.)
3.
The power source outlet is inoperative.
Have a qualified electrician repair the outlet.
4.
The incorrect bulb is installed.
Replace with the correct bulb.
5.
Power switch is off or intensity control turned too low.
Turn power on or rotate
illumination intensity control.
Light flickers
1.
The bulb is not properly inserted into the socket.
Fully insert the bulb.
2.
The bulb is about to burn out.
Replace the bulb.
3.
The connection at the AC outlet is loose.
Have a qualified electrician repair the outlet.
4.
Fuse is not tightly screwed in.
Screw fuse in all the way.
No image
1.
The nosepiece is not indexed properly.
Move revolving nosepiece until the objective
lens clicks into position.
2. The light is too bright.
Adjust the diaphragm or illumination intensity control.
Unable to
focus slide
1.
The slide coverslip is too thick.
Use 0.17 mm thick (No. 1) coverslip.
2.
The stage drops under its own weight.
Adjust tension of coarse focus knob.
(See
“Adjusting Tension,” p. 6.)
3.
The slide is upside down.
Place the slide on the stage with the coverslip facing up.
Poor
resolution,
image not
sharp
1.
The condenser, objective, or eyepiece lenses are dirty.
Clean the lenses. (See
“Cleaning,” p. 2.)
2.
There is too much light.
Adjust the diaphragm or illumination intensity control.
