Try a different USB port or replace the cable; long cables can sometimes lose signal integrity.
For international versions or specific model variants like the -VERIFIED- Download Usb Driver Jinka 721
If your plotter is still not responding, check these common fixes: CH341SER.EXE - Nanjing Qinheng Microelectronics Co., Ltd. Try a different USB port or replace the
: Download the driver directly from the official source. If you own a (commonly a tablet, e-reader,
If you own a (commonly a tablet, e-reader, or low-cost Android device) and need to connect it to a PC for file transfer, firmware flashing, or ADB debugging, you’ve likely discovered that finding the correct USB driver is frustrating.
Right-click My Computer > Properties > Device Manager . Look under "Ports (COM & LPT)" to confirm the device appears without a yellow exclamation mark. 3. Connection Tips for Success CH341SER.EXE - Nanjing Qinheng Microelectronics Co., Ltd.