Solutions for "USB001 Operator error":
- Disconnect the USB cable and the power cable from the printer.
- Power off the printer and the central unit.
- Wait a minute.
- Connect the power cable to the printer.
- Power on the printer and open the cover.
- Power on the central unit and connecte the USB cable to the printer.
- Closer the cover.
- Uninstall the driver of the printer
- Reinstall the driver.
- Try another USB port.
- The electronical car of the printer may be faulty.