The problem can be detected in the following ways: 1. If the printer is not turned on, you can connect it to a power source and turn on the power button before trying to connect. 2. If the device connection limit has exceeded, you can disconnect the Bluetooth connection of other devices and search again. 3. Check whether the Bluetooth of the mobile phone is turned on. If not, turn on the Bluetooth of the mobile phone and try to connect.

1. Please make sure that the label paper is loaded correctly. The printing surface of the label paper must be loaded facing upwards towards the print head. 2. Please check whether the thermal label paper is used. If not, please replace it before printing.

The following reasons may exist: 1. The machine's paper compartment cover is not closed. You can check the indicator light status after closing the compartment cover. 2. The machine does not have label paper. You can check the indicator light status after placing the label paper. 3. The label paper is not pulled out of the paper compartment. You can adjust the label paper and then check the indicator light status. 4. The temperature of the machine's print head is too high. You can stop printing first and try to reprint after the temperature of the print head drops. 5. Printing is abnormal. You can handle it according to the prompts on the application end. If the above attempts cannot improve the problem, please contact Jingchen's official customer service for consultation and resolution.

You can check it in the following ways: 1. Check whether the machine is turned on and make sure it is turned on. 2. Check whether the USB cable is connected. You can refer to the USB connection method in the manual to connect it.

You can check and handle it in the following ways: 1. Please check whether the print density setting on the software is correct. If not, please adjust the density before printing. 2. Please check whether the print roller is too dirty or damaged. You can refer to the print roller cleaning method in the manual to clean it before trying to print. 3. You can check whether the print head is worn. If it is worn, you can contact NIIMBOT official customer service for consultation and replacement. 4. It is recommended to use NIIMBOT official original consumables to ensure a longer service life of the printer.

1. If the printer has a paper jam, you can open the machine cover, pull out the jammed paper from the print roller and replace it. 2. The label paper has been exhausted. You can replace the label paper before printing. 3. The label type is set incorrectly. Please confirm whether the label paper type is consistent with the selection on the application end. 4. The non-genuine NIIMBOT consumables have not been calibrated for external consumables. The printer cannot determine the consumable type. Please calibrate the external consumables in the APP (click on the upper right corner of the App, Model Settings - Paper Calibration - Select the corresponding paper type according to the external consumables) and then set the correct paper type according to the non-genuine NIIMBOT consumables when editing the print template.