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Cause of Error Code 1D:
Your printer is no longer recognized by your computer. Because a duplex unit is recognized as a USB composite device, it cannot be used. The name of this error is a 1D error.
Don't worry; just follow the instructions below if you're having issues with error 1D.
Solution for Error Code 1D:
- Here are a few steps you should take to resolve error 1D.
- Attempt to connect your printer to a different computer (that knows it as a printer.)
- Give the computer a little time to identify the printer as a device.
- As soon as your computer detects your printer, you must begin looking for your Brother Printer Model QL-720NW.
- At this point, select the Brother Printer Model QL-720NW.
- Select your OS family and version after selecting your model, then click the search button.
- Choose the Firmware Update Tool from the Firmware section.
- Currently, click the desired language.
- A self-starting download will now be started by the Firmware Update Tool.
- Launch the firmware updater (during this process, the wizard will automatically recognize your computer.).
- The wizard must be followed all the way through.
- After completing the aforementioned steps, unplug your printer from the current computer and plug it into the earlier one.
- Your printer will now be monitored by your computer.
(Note: Use your device's network port if you don't have a computer and follow the above instructions.)
The last step in fixing a 1D error on a Brother QL-720NW printer.
If your Brother printer is still covered by a warranty, you can contact the Brother Printer Repair Center for assistance. They will also help you with any additional troubleshooting that may be necessary.