Troubleshooting; Viewing Problems And Control Problems - Nikon ECLIPSE MA200 Instructions Manual

5

Troubleshooting

Improper use of the microscope may adversely affect performance, even if the microscope is not damaged. If
any of the problems listed in the table below arise, take the countermeasures indicated.
If the problem is not listed below, or if the problem cannot be resolved by the suggested countermeasure,
unplug the power cord and contact your nearest Nikon representative.
5.1

Viewing Problems and Control Problems

Problem
The view-field is invisible,
vignetted, or uneven in brightness.
Epi-fl microscopy
Diascopic microscopy
Cause
The lamp is not attached correctly.
The lamp is not lit.
The optical path changeover lever for the
eyepiece tube/back port selection or the
binocular tube/vertical tube selection is in an
intermediate position.
A filter or a slider is in an intermediate position.
The field diaphragm is stopped down too far.
The revolving nosepiece is not attached
correctly.
The rotation of the revolving nosepiece is
stopped at an incorrect position. (No objective
is placed in the optical path.)
The sample holder is placed into the optical
path.
The BD field changeover lever is in an
intermediate position.
The intermediate magnification is in the
intermediate position.
No fluorescent unit is attached in place; the
fluorescent unit is attached in a wrong
position.
The fluorescent unit selection is wrong.
The condenser position is too low.
The condenser is not centered.
The condenser is not attached correctly.
The condenser turret position of the system
condenser is located in an intermediate
position.
The polarizer is not attached correctly.
98
Countermeasure
Install the lamp correctly.
Be sure that the cable is connected, then turn
the power on.
Securely move the optical path changeover
lever to the position where 100% light goes
through the binocular eyepiece.
Move the filter or the slider to a click-stop
position. (p.40, 43 - 50, 53, 54)
Open the diaphragm to a suitable size.
Install the revolving nosepiece correctly. (p.78)
Turn the revolving nosepiece to the click-stop
position. (Place the objective into the optical
path.)
Remove it from the optical path.
Move the lever to the click-stop position.
Be sure to switch the position correctly.
Attach the fluorescent unit to the correct
position.
Use a suitable fluorescent unit.
Adjust the condenser focus knob to enable the
field diaphragm image focus on the sample
surface.
Center the condenser.
Install the condenser correctly.
Turn it to the click-stop position.
Attach the polarizer to the correct position.
(p.78)
(p.78)
(p.33)
(p.41)
(p.39)
(p.38)
(p.31)
(p.55)
(p.50)
(p.50)
(p.59)
(p.58)
(p.89)
(p.93)