September 17, 2025
The exact steps can vary slightly, but this is the standard procedure for most rigid endoscope camera heads like the H3-Z.
Step 1: External Inspection and Preparation
Physically inspect the camera head for any obvious external damage.
Take photographs at every single step. This is your reference for reassembly.
Place the camera head on your ESD mat and attach your wrist strap.
Remove the camera head from its connecting cable (if it's a modular design). This usually involves unlocking and unscrewing the C-Mount or bayonet-style connector.
Step 2: Removing the Outer Shell/Housing
Locate and remove the small screws on the exterior of the camera head. These are often hidden under warranty stickers or rubber grips. Peeling these stickers will void the warranty.
The housing typically consists of two clamshell halves. Carefully use plastic spudgers to pry the halves apart, working your way around the seam. Do not use metal tools as they will gouge the aluminum housing.
Once the shell is separated, you will have access to the main internal assembly.
Step 3: Disconnecting Internal Components
You will now see the main printed circuit board (PCB), the sensor block, and the light guide connector.
Before removing anything, note the orientation and placement of all components.
Carefully disconnect any ribbon cables. These connectors often have a small locking latch that must be flipped up before the cable can be slid out.
Note and disconnect any other wiring harnesses.
Step 4: Accessing the Sensor and Optics
The sensor is usually housed in a separate metal block attached to the main PCB or the front housing.
Unscrew the sensor block from its mount. This is a critical step—the sensor must not be tilted or forced.
The front objective lens is likely sealed within the distal end of the camera head. It is often not user-serviceable without special press tools.
Step 5: Cleaning (If Applicable)
Front Lens: If the front lens is dirty, gently clean it with a blast of compressed air first. If moisture or debris remains, apply a small drop of lens cleaner to a microfiber cloth and gently wipe the lens in a circular motion from the center outward. Never apply liquid directly to the lens.
Sensor: Extreme caution! The sensor is fragile. Use a dedicated sensor cleaning swab designed for its size. Apply a drop of sensor cleaning fluid to the swab and wipe the sensor in a single, smooth pass. Do not scrub.
Internal Optics: It is generally not advised to disassemble the internal prism assembly. If dust is inside, using a very gentle stream of compressed air is the safest method.
