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Olympus and Nikon Microscope Bulb Replacement Guide

Olympus and Nikon Microscope Bulb Replacement Guide

Replacing the bulb in a microscope is a relatively straightforward task, but it's important to follow proper procedures to avoid damaging the microscope or the bulb itself. Here's a general guide to help you replace the bulb in a typical microscope:

Before You Begin:

  1. Safety First: Ensure the microscope is turned off and unplugged before starting any work on it. Additionally, wear protective gloves to avoid oils and contaminants from your skin transferring to the bulb.

  2. Identify the Bulb Type: Make sure you have the correct replacement bulb for your microscope. Refer to the microscope's user manual or contact the manufacturer for information on the specific bulb required.

Steps to Replace the Microscope Bulb:

  1. Access the Bulb Housing:

    • Depending on your microscope model, the bulb housing may be located in different places. Common locations include the base of the microscope or within the illumination system. Refer to the user manual for guidance.
  2. Remove the Old Bulb:

    • Gently unscrew or unclip the old bulb from its housing. Be careful not to touch the bulb with your bare fingers, as the oils from your skin can cause the bulb to fail prematurely due to overheating. If you accidentally touch the bulb, clean it with a lint-free cloth and alcohol.
  3. Insert the New Bulb:

    • Carefully insert the new bulb into the housing, making sure it is securely seated.
  4. Secure the Bulb:

    • If the bulb uses a screw or clip to secure it in place, do so carefully without over-tightening, as this can damage the bulb.
  5. Reassemble the Housing:

    • If you had to remove any covers or shields to access the bulb, reattach them securely.
  6. Connect the Microscope:

    • Plug the microscope back in, and turn it on to test the new bulb. Ensure that the illumination system is working correctly.
  7. Adjust the Brightness:

    • If your microscope has adjustable brightness settings, adjust them to your desired level.
  8. Final Inspection:

    • Carefully examine the illumination to ensure there are no flickers or issues with the new bulb. Make sure the light is evenly distributed through the microscope optics.

Maintenance Tips:

  • Clean the microscope's optics and lenses regularly to maintain image quality.
  • Keep spare bulbs on hand for quick replacements when needed.
  • Follow the manufacturer's guidelines for bulb replacement intervals and maintenance.

Always refer to your microscope's user manual for specific instructions related to your model, as the exact procedure may vary slightly from microscope to microscope. If you are unsure about any step, or if you encounter difficulties during the replacement process, it's best to contact the manufacturer or a qualified technician for assistance.

Common Replacements for Olympus, Nikon, Leica and Zeiss Models


  1. BH2 or BHTU Microscope:

  2. BHS Microscope:

  3. BX40 and BX41 Microscope:

  4. BX50 and BX51 Microscope:

  5. CX21 and CX31 Microscope:

  6. CX41 Microscope:


  1. Nikon Labophot and Labophot 2:

  2. Nikon Optiphot and Optiphot 2:

  3. Nikon E400:

  4. Nikon E600:

  5. Nikon 50i:

  6. Nikon 80i:

  7. Nikon E200:

How to videos on changing your bulb!

BX 40 and BX41 Video

CX Models Video

Nikon E400 and 50i Video

Nikon E200 Video

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