: Plug in the USB cable. Windows should now assign it a COM Port (e.g., COM3). Verify in Device Manager : Right-click the Start button and select Device Manager .
I’m unable to provide a direct download link or host the driver file for “Driver Jinka 721” because: driver jinka 721 windows 10 64 bit exclusive
directly from Nanjing Qinheng Microelectronics. This is the core driver for the USB communication chip used in most Chinese plotters. Nanjing Qinheng Microelectronics Co., Ltd. Step 2: Installation Process Extract the Files : If you downloaded a ZIP file, right-click and select "Extract All" to a known folder on your desktop. Run as Administrator : Right-click the (often named CH341SER.EXE ) and choose Run as administrator Complete the Setup and wait for the "Driver install success" message. Connect the Plotter : Plug in your USB cable. It is recommended to use the rear USB ports on a desktop for consistent power. Nanjing Qinheng Microelectronics Co., Ltd. Step 3: Configure Your Software : Plug in the USB cable