1. Please check whether the charging power cord is normal. 2. If the power cord is damaged, you can replace it with an adapter power cord for charging. 3. If the power cord is checked to be normal but still cannot be charged, it is a printer failure. Please contact after-sales customer service to send it back for processing.

1. Please check whether the label paper is installed in the correct position. The correct installation steps are as follows: ① Press the cover opening button on the right side of the paper bin to open the paper bin. ② Put the label paper into the label roll with the printing side facing down. ③ The label paper is close to the leftmost side of the paper bin, and the label paper baffle is adjusted to close to the label paper and locked. ④ Close the top cover, first press and hold the power button on the left side of the panel to turn on the machine, and then press the button on the right side to eject the paper. The label paper ejects and it is normal. 2. After the label paper is loaded, the paper feeding is not calibrated, and the position of the first label paper is offset. Then the second printing will automatically calibrate and become normal. 3. The template selection on the APP is wrong or the size and printing direction are not set correctly, resulting in printing offset. 4. The gap between the label paper is too small, please replace the original matching label paper of Jingchen. 5. Please check whether the upgraded printer firmware version is the latest version. 6. If the above faults are eliminated, it is a printer fault. Please contact after-sales customer service to send it back for processing.

1. Please check whether the label paper is installed correctly. The printed side of the label paper should be installed facing down and placed in the paper bin. 2. If the label paper is installed correctly, please confirm whether the firmware version is the latest version. 3. If the above problems are excluded, it is a printer failure. Please contact after-sales customer service to send it back for processing.

1. Please confirm whether the battery is not installed on the back of the machine or whether the battery is not locked. 2. If the battery is still faulty after reinstalling the battery, it is a printer failure. Please contact after-sales customer service to send it back for processing.

1. Please check if the print head is dirty. You can clean it with a cotton swab dipped in alcohol. 2. Please check if the label paper is genuine NIIMBOT thermal paper. If not, please replace it with genuine NIIMBOT paper. 3. Please check if the paper is thick cardstock. If so, you need to set a higher print density. 4. Please check if the machine's battery is low. You can charge it and then print a test. 5. If the above situations are not resolved, the problem is a machine malfunction. Please contact customer service for assistance.

Problem: If Bluetooth cannot be searched or connected, please check according to the following methods: 1. Confirm whether the Bluetooth of the mobile phone is turned on. 2. Check whether the device model is selected correctly in the APP search interface. 3. Restore the machine to factory settings and restart the mobile phone Bluetooth. Some Android phones need to turn on GPS positioning (Android phones perform Bluetooth search in settings to confirm whether the machine device can be received). 4. Uninstall and reinstall the APP and search and connect again. 5. Please change another mobile phone to try searching and connecting. 6. If the above problems are excluded, it is a printer failure. Please contact after-sales customer service to send it back for processing.

1. Please confirm whether the label paper is installed upside down. The first label paper needs to be placed in the paper bin with the printing side facing down. Installation steps: ① Press the cover opening button on the right side of the paper bin to open the paper bin. ② Put the label paper into the label roll with the printing side facing down. ③ The label paper is close to the leftmost side of the paper bin, and the label paper baffle is adjusted to close to the label paper and locked. ④ Close the top cover, first press and hold the power button on the left side of the panel to turn on the machine, and then press the button on the right side to eject the paper. The label paper ejects the paper and it is in normal state. 2. If the label paper is installed correctly, please confirm whether the self-test page is printed normally by printing the self-test page. Self-test page printing method: Turn on the machine--press the left button on the panel (switch screen display)--when the screen displays: Print self-test page--press the right button on the panel (the machine ejects paper and prints the self-test page). ① If the self-test page is abnormal at the same time, it is a printer failure. Please contact the after-sales customer service to send it back for processing. ② If the self-test page is displayed normally, please check the APP software settings.

1. If the printer cannot stop and makes a "clicking" sound, it means that the current roll of printing paper has been used up. Please replace it with new printing paper. 2. Please open the cover and close it again to print again. If this phenomenon still occurs, it is a printer failure. Please contact after-sales customer service to send it back for processing.

1. Please open the machine paper bin to confirm whether the current label paper has been used up. 2. Please confirm whether the paper type is set correctly in the APP. 3. Please check whether there is label paper or foreign objects blocking the detector in the machine paper bin. 4. If the self-test page cannot be printed normally, it is a printer failure. Please contact after-sales customer service to send it back for processing.

1. Check whether the machine is set to black mark paper mode. You can press the left button several times to find the paper type, and press the right button of the machine to set the black mark paper. 2. If the setting is correct, it still prompts abnormal paper feeding. You can check whether the software template is selected correctly. 3. Excluding the above situation, you can restore the machine to factory settings or perform paper calibration. Paper calibration: Press and hold the two buttons of the machine for four seconds without releasing them. The machine firmware screen will be displayed. Press the left button of the machine several times to find paper calibration, and then press the right button of the machine. The machine will print a section of paper. After prompting successful calibration, perform a print test again. Factory Restore: Press and hold the two buttons of the machine for four seconds without releasing them. The machine firmware screen will be displayed. Press the left button of the machine several times to find factory reset, and then press the right button of the machine ten times in a row. The machine will feed a section of paper. After prompting successful recovery, perform a print test again.