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1. Error message displayed on the LCD screen
When an error occurs, the LCD displays a message. Errors, possible reasons, and recommended solutions are listed below.

Displayed information 1: Invalid Head
Possible reason: The original Zebra ZM400 printhead was not used when replacing the printhead.
Solution: Install the original Zebra ZM400 printhead.

Displayed information 2: Ribbon Out
Possible reason 1: In thermal transfer mode, the ribbon is not loaded or loaded incorrectly.
Solution: please load the media correctly.
Possible reason2: In thermal transfer mode, the ribbon sensor does not detect the correctly loaded ribbon.
Solution: Please load the media correctly and calibrate the sensor.
Possible reason 3: In thermal transfer mode, the media blocks the ribbon sensor.
Solution: Please load the media correctly and calibrate the sensor.
Possible reason 4: In thermal transfer mode, the printer does not detect the ribbon even if the ribbon has been loaded.
Solution: Please print the sensor chart, calibrate the sensor or load the printer defaults.

Displayed information 3: Ribbon In
Possible reason: The ribbon is loaded, but the printer is set to thermal mode.
Solution: Thermal media does not require ribbon. If you want to use thermal transfer media that requires ribbon, set the printer to use in the "thermal transfer mode".

Displayed information 4: Paper Out
Possible reason 1: The media is not loaded or the media is not loaded properly.
Solution: Please load the media correctly.
Possible reason 2: The media sensor is misaligned.
Solution: Check the media sensor position.
Possible reason 3: The printer has been set up for non-continuous media, but contiguous media is loaded.
Solution: Please install the correct media type, or reset the printer to the current media type and perform calibration.

Displayed information 5: Head Open
Possible reason 1: The print head is not completely closed.
Solution: please completely close the print head.
Possible reason 2: The print head opening sensor is not working properly. Solution: please replace the sensor.

2. Calibration failure
Phenomenon 1: The print alignment mark on the label is missing, and the vertical offset of the top alignment mark on the form is too much.
Possible reason 1: The platen roller is too dirty.
Solution: Please clean the platen roller.
Possible reason 2: The position of the media guide is not correct.
Solution: Please ensure that the media guide is correctly positioned.
Possible reason3: The media type is incorrect.
Solution: Set the printer to use for the correct media type.
Possible reason 4: The media is not loaded correctly.
Solution: Please load the media correctly.

Phenomenon 2: Auto calibration failed.
Possible reason 1: The media or ribbon is not loaded correctly.
Solution: Please load the media and ribbon correctly.
Possible reason 2: The ribbon or media is not detected by the sensor. Solution: Please calibrate the printer manually.
Possible reason 3: The sensor is too dirty, or the positioning is not correct, the sensor cannot be detected.
Solution: Please make sure the sensor is clean and the media position is correct.
Possible reason 4: The media type setting is incorrect.
Solution: Set the printer to use for the correct media type.

3. Zebra ZM400 Communication failure
Phenomenon 1: The label format has been sent to the printer, but it is not recognized and the data indicator is not flashing.
Possible reason: The communication parameters are incorrect.
Solution 1: Check the printer driver or software communication settings. Solution 2: If using a serial port, check the port settings in the control panel menu.
Solution 3: If you use a driver, check the driver communication settings related to the connection.

Phenomenon 2: The label format has been sent to the printer. After printing multiple labels, the printer skips, misplaces, loses images, or distorts the image on the label.
Possible reason: The serial communication setting is incorrect.
Solution 1: Make sure the flow control settings match.
Solution 2: Check the length of the communication cable.
Solution 3: Check the printer driver or software communication settings.

Phenomenon 3: The format has been sent to the printer, but it is not recognized, the data light flashes, but it does not print.
Possible reason 1: The prefix and separator character set in the printer do not match the character set in the label format.
Solution: Please check the prefix and separator characters.
Possible reason 2: Incorrect data is being sent to the printer.
Solution: Please check the communication settings on the computer to make sure these settings match the settings on the printer. If the problem persists, check the label format.

4. Ribbon failure
Phenomenon 1: The ribbon is broken or melted.
Possible reason: The depth setting value is too high.
Solution 1: Reduce the depth setting value.
Solution 2: Thoroughly clean the print head.

Phenomenon 2: The printer has not checked that the ribbon has run out. Possible reason: The printer is calibrated without a ribbon loaded, then the ribbon is inserted without performing a user recalibration of the printer, or the printer defaults are not loaded.
Solution: Use the ribbon to calibrate the printer, or load the printer defaults.

Phenomenon 3: In thermal transfer mode, the ribbon is not detected by the printer even though the ribbon is loaded correctly.
Possible reason: The printer is calibrated without a ribbon loaded, then the ribbon is inserted without performing a user recalibration of the printer, or the printer defaults are not loaded.
Solution: Use the ribbon to calibrate the printer, or load the printer defaults.

Phenomenon 4: The ribbon indicator illuminates even if the ribbon is loaded correctly.
Possible reason: The printer is not calibrated for the label and ribbon to be used.
Solution: Perform calibration media and ribbon sensor sensitivity.

zebra zm400 barcode printer

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