Assuming you want a Windows 10 driver for the Jinka 721 device (printer/scanner/other), here’s a concise plan to get it working:
Q: My Jinka 721 works, but the speed is slow (under 100Mbps). Why?
Method 1: The Official (But Hidden) Realtek Driver
Since Jinka is a generic brand, they rarely have an official website. Instead, use the original chipset manufacturer’s driver.
Disable Driver Signature Enforcement: Windows 10 often blocks "unsigned" Jinka drivers. To bypass this, hold Shift while clicking Restart, then go to Troubleshoot > Advanced options > Startup Settings > Restart. Press 7 (or F7) to select "Disable driver signature enforcement". 1. Download & Install Communication Driver
Set the Output Port to the COM port you identified in Device Manager (e.g., COM3).
Set the Baud Rate (if requested). Standard settings are usually 9600 or 38400. Ensure the software and the cutter's internal menu settings match.
A. Physical Connection
Connect the cutter to the PC via USB. Windows will likely attempt to install a driver and fail, labeling the device "Unknown Device" or failing to find a driver.
- For printers: try adding the printer in Settings > Devices > Printers & scanners > Add a printer or scanner > “The printer that I want isn’t listed” > Add a local printer or network printer with manual settings and choose a compatible manufacturer/model driver (e.g., generic PCL or PostScript).
- For USB devices: try installing the vendor’s USB driver package or the latest chipset/USB controller drivers from your PC/motherboard maker.
- Plug the cutter into your PC via USB and power it on.
- Open the Windows Start Menu, type Device Manager, and press Enter.
- Look for "Ports (COM & LPT)" or "Other Devices."
- You might see "USB-Serial Controller," "USB-SERIAL CH340," or "Unknown Device."
You should see "USB-SERIAL CH340" or a similar entry assigned to a specific port (e.g., COM3). 3. Configuring Your Software
