The YIZHAN XHU4002 4K microscope camera is designed for high-resolution digital microscopy, PCB inspection, electronics repair, industrial inspection, and other detailed imaging applications.

In some cases, a firmware upgrade may be required to improve camera compatibility, resolve software or driver-related issues, or restore normal camera operation.

This guide explains how to upgrade or flash the firmware of the XHU4002 camera using a Windows 7 computer.

Important: Firmware flashing should only be performed with the correct firmware package for the XHU4002 camera. Do not disconnect the USB cable, power off the camera, or close the flashing software during the process.

1. Prepare Before Flashing

Before starting, prepare the following:

Required Equipment

• A Windows 7 computer, either 32-bit or 64-bit
• YIZHAN XHU4002 microscope camera
• USB cable
• XHU4002 firmware/flash package
• XHU4002 camera driver and required driver-signing files

Download the XHU4002 Software and Firmware

YIZHAN provides the relevant camera software, drivers, manuals, parameters, and firmware flashing package through the official Download Center.

You can find:

• XHU4002 camera parameter information
• YIZHAN USB camera driver
• XHU4002 firmware/flash package
• Digital microscope manuals and other technical documents

Official YIZHAN Download Center:
Download XHU4002 Firmware, Driver & Software

Before downloading or flashing firmware, make sure the package is specifically intended for the XHU4002 camera. Using an incompatible firmware package may cause the camera to malfunction.

2. Open the Windows Administrator Command Prompt

Start the Windows 7 computer.

Click Start in the lower-left corner of the desktop and type:

cmd

Right-click cmd.exe and select:

Run as administrator

This opens the Windows Administrator Command Prompt.

3. Enable Windows Test Mode

In the Administrator Command Prompt, enter:

bcdedit /set testsigning on

Press Enter.

After the command has been successfully executed, restart the computer.

After Windows restarts, Test Mode should appear in the lower-right corner of the desktop.

Windows Test Mode is required for installing and working with the driver files used during this firmware flashing procedure.

4. Install the XHU4002 Camera Driver

Open the XHU4002 firmware/flash package that you downloaded from the YIZHAN Download Center.

Find the driver installation file or driver installation folder.

Double-click the driver installation program and follow the instructions displayed on the screen.

Complete the driver installation before proceeding to the next step.

5. Enter XHU4002 Firmware Flashing Mode

This is an important step.

First, press and hold the AE button on the XHU4002 camera.

While continuing to hold the AE button, connect the camera to the Windows 7 computer using the USB cable.

Keep holding the AE button until the computer detects the camera.

Open Device Manager and check whether the following device appears:

ICATCH (X) KV Series Video Camera Device

Once the device appears in Device Manager, you can release the AE button.

If the device does not appear, disconnect the USB cable and repeat the procedure.

6. Sign the Required Driver Files

Open the XHU4002 firmware/flash package.

Find the Driver Signature tool or folder and double-click to open it.

Locate the following two driver files:

• Ca6350av.sys
• Bulk6350.sys

Use the provided Sign function to sign each driver file.

Complete the signing process for both files.

Once both driver files have been successfully signed, continue to the next step.

7. Open the XHU4002 Firmware Burning Tool

Return to the XHU4002 firmware package.

Locate and open the burning file or firmware flashing tool.

Make sure:

• The XHU4002 camera is connected to the computer.
• The camera is correctly recognized by Windows.
• The correct XHU4002 firmware file is selected.

8. Start the Firmware Flashing Process

Click Burning in the flashing tool.

The firmware flashing process will begin and a progress bar will appear.

Wait until the progress bar finishes.

Do not interrupt the process

During flashing:

• Do not disconnect the USB cable.
• Do not turn off the camera.
• Do not close the flashing software.
• Do not restart or shut down the computer.

Interrupting the firmware flashing process may cause the camera to malfunction.

9. Firmware Upgrade Completed

When the progress bar reaches 100% or the flashing software displays a completion message, the firmware upgrade is complete.

Close the flashing tool if required.

Reconnect the XHU4002 camera normally and check whether the computer and microscope system can recognize the camera correctly.

You can also open the microscope camera software and check the camera image to confirm that the upgrade was successful.

10. Exit Windows Test Mode

After completing the firmware upgrade, open Command Prompt as Administrator again.

Enter:

bcdedit /set testsigning off

Press Enter.

Restart the computer.

After Windows restarts, the Test Mode watermark should disappear and Windows will return to normal operating mode.

XHU4002 Firmware Flashing Troubleshooting

The XHU4002 camera is not detected

Make sure you:

1. Press and hold the AE button before connecting the USB cable.
2. Continue holding the AE button until the camera appears in Device Manager.
3. Check whether ICATCH (X) KV Series Video Camera Device appears.
4. Check that the correct USB camera driver has been installed.

If the camera is still not detected, disconnect the USB cable and repeat the connection procedure.

The driver cannot be installed

Check whether Windows 7 is correctly running in Test Mode.

You should see the Test Mode watermark in the lower-right corner of the Windows desktop.

Also confirm that the required driver files have been correctly signed.

The flashing tool does not start the upgrade

Check the following:

• The correct XHU4002 firmware package is being used.
• The camera is correctly recognized in Device Manager.
• The required drivers are installed.
• The required driver files have been signed.
• The USB connection is stable.
• The flashing tool is running with the required permissions.

The camera does not work after flashing

Do not immediately try another firmware file.

First confirm that the firmware package is specifically designed for the XHU4002 camera. If the camera still does not operate normally, contact YIZHAN technical support before attempting another firmware upgrade.

Download XHU4002 Firmware, Driver and Technical Documents

YIZHAN maintains an official download center where users can access microscope manuals, camera parameters, USB camera drivers, and the XHU4002 firmware flashing package.

👉 Visit the YIZHAN Official Download Center

For firmware upgrade questions or technical assistance, users can also contact the YIZHAN support team through the contact information provided on the official website.

Conclusion

Flashing the firmware of the YIZHAN XHU4002 4K microscope camera involves several important steps:

Download the correct XHU4002 firmware → Enable Windows Test Mode → Install the driver → Hold AE + connect USB → Confirm the ICATCH device → Sign the driver files → Open the burning tool → Start flashing → Complete the upgrade → Disable Windows Test Mode

Following the procedure carefully helps reduce the risk of driver or firmware errors and ensures that the XHU4002 camera can be returned to normal operation after the upgrade.

If you are looking for the XHU4002 firmware, USB camera driver, camera parameters, or microscope manuals, use the official YIZHAN Download Center rather than downloading firmware from third-party sources.