What to do if the coarse adjustment knob on my Olympus CX31 Microscope is hard to turn?
- AAmanda NortonSep 2, 2025
If the coarse adjustment knob on your Olympus Microscope is hard to turn, the tension adjustment ring may be overtightened. Loosen it.

What to do if the coarse adjustment knob on my Olympus CX31 Microscope is hard to turn?
If the coarse adjustment knob on your Olympus Microscope is hard to turn, the tension adjustment ring may be overtightened. Loosen it.
What to do if one side of the image is blurred on my Olympus Microscope?
If one side of the image is blurred or the image seems to waver on your Olympus Microscope, it could be due to: * The objective not being correctly engaged in the light path. Make sure that revolving nosepiece clicks into place correctly. * The specimen not being correctly mounted on the stage. Place the specimen correctly on top of the stage and secure it with the specimen holder.
How to resolve image diffraction on an Olympus CX31?
If the image shows diffraction when using your Olympus Microscope, it could be due to the condenser being lowered too far or the aperture iris diaphragm being stopped down too far. Try adjusting the condenser height position and opening the aperture iris diaphragm.
How to fix diffraction in Olympus CX31 image?
Diffraction in your Olympus Microscope image can be resolved by: * Adjusting the condenser height position if the condenser is lowered too far. * Opening the aperture iris diaphragm if it is stopped down too far.
Why does my Olympus Microscope image blur as I move the specimen?
If the image blurs as you move the specimen on your Olympus Microscope, it could be due to the specimen not being correctly positioned on the stage. Remount the specimen correctly by applying it to the stage surface and inserting it below the specimen holder.
What to do if the field of view is obscured on Olympus CX31 Microscope?
If the field of view on your Olympus Microscope is obscured or not evenly illuminated, consider the following: * Ensure the revolving nosepiece is correctly engaged and clicks properly into place. * Center the field iris diaphragm if it is not properly centered. * Open the field iris diaphragm to an optimum stop position if it is stopped down too far. * Clean any dirt or dust from the objective, eyepieces, condenser, or light exit glass.
Why is there dirt visible in the field of view of my Olympus CX31 Microscope?
If you see dirt or dust in the field of view of your Olympus Microscope, the cause may be dirt or dust on the light exit glass. Clean it thoroughly.
| Type | Biological Microscope |
|---|---|
| Observation Method | Brightfield |
| Objective Lenses | 4x, 10x, 40x, 100x (Oil) |
| Focus | Coaxial coarse and fine focus knobs |
| Weight | Approx. 7 kg |
| Eyepiece | 10x |
| Nosepiece | Quadruple |
| Stage | Mechanical stage |
| Illumination | Built-in illumination |
| Condenser | Abbe condenser N.A. 1.25 with aperture diaphragm |
| Illumination Type | LED |
| Power Supply | AC 100-240V, 50/60Hz |
| Optical System | UIS2 (Universal Infinity System) |
Essential safety rules and guidelines to prevent injury and equipment damage during operation.
Explanation of symbols used on the microscope for safe operation.
Location and importance of warning labels for special precautions.
Instructions for proper cleaning, maintenance, and storage of the microscope.
Important warnings regarding potential damage or safety risks from improper use.
Step-by-step guide for replacing the microscope's illumination bulb.
Instructions for safely connecting the microscope's power cord.
Operation of the main switch, light intensity, and field iris diaphragm.
Adjusting coarse/fine focus tension and using the simplified pre-focusing dial.
Placing and moving specimens on the microscope stage.
Adjusting interpupillary distance and diopter for clear viewing.
Using eye shades, light paths, and eyepiece micrometer disks.
Centering the field iris diaphragm and adjusting the aperture iris diaphragm.
Guidelines for using immersion oil with high-power objectives.
Resolving issues with field of view, illumination, and image clarity.
Solutions for problems with focus, stage drift, and specimen placement.
Troubleshooting illumination bulb and power cord issues.
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