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
If you follow this guide, your Jinka 721 will perform as if it were a premium device. For ongoing support, join the Jinka User Community on Discord or consult the pinned threads on the r/Jinka subreddit. driver jinka 721 windows 10 64 bit exclusive