OBSERVATION
CAUSE
REMEDY
The specimen slide is upside down
Set the specimen correctly with the
cover glass facing upwards
The cover glass is too thick
Use a cover glass with thickness of
0.17mm
The stage is raised too high
Lower the stage
The slide has slipped from the slide
holder
Re-position the slide in the slide
holder
Slide is of excessive thickness
Use slides with thickness between
0.9 and 1.4mm
9. Bulb does not turn On
Bulb is not mounted
Attach a bulb
Bulb is blown
Replace the bulb
The power cord is unplugged/ Not
firmly secured
Ensure power cord is securely plugged
into the box wall outlet
Fuse is blown
Check and replace with live fuse
10. Bulb blows easily
12. Conoscopic image is not visible
13. Extinction failure
Analyzer & Polarizer out of the light
path.
Analyzer & Polarizer are not in cross
positions.
Adjust Polarizer by rotating to get
complete extinction.
Bring Analyzer & Polarizer of the
light path.
The specified bulb is not used
Replace with the specified bulb
Swing out Polarizer from light path.
Swing out Bertrand Lens to out “O”
position i.e. away from light path.
8. Objective hits the specimen when
an objective is switched to a higher
magnification objective
26
Lx POL
9151000-795
Lx POL
Issue 1.3
Printed on April,2019
11. Field remain dark even Bulb is on
In the Exintetion Position
Bertrand Lens in the Light Path (BL).
Condenser Top Lens not in the Light
Path.
Using lower magnification objective. Go to specified magnification
objective i.e. from 20x to 100x.
Swing in Top Lens of condenser in
the Light Path.
Bertrand Lens is away from Light
Path.
Bring Bertrand Lens in light path at
“BL” position.
Remove Analyzer from light path bye
switch Analyzer lever to out “O”
position.