Once the "Installation Successful" message appears, plug the plotter into a USB 2.0 port and turn it on. Verify in Device Manager: Right-click the Start button > Device Manager Ports (COM & LPT)
chipset for their USB connection. You will need this driver first to create a virtual COM port. Nanjing Qinheng Microelectronics Co., Ltd. CH341 USB-to-Serial Driver: Download the official CH341SER.EXE Download Driver Jinka Pro 721 For Windows 10
Some users find success with specific Jinka driver packages hosted on Google Drive or provided via YouTube tutorial links 2. Installation Steps Disconnect the Plotter: Keep the USB cable unplugged from your PC before starting. Install CH341SER: Run the downloaded file and click Connect Hardware: Once the "Installation Successful" message appears, plug the