Broken or melted ribbon
Darkness is set too high.
The ribbon is coated on the wrong side and cannot be used in this printer.
Ribbon was loaded incorrectly.
Incorrect burn temperature.
Incorrect or uneven printhead pressure.
Media not feeding properly; “walking” from side to side.
Adjust the media guide until it just touches the edge of the media. If this does not solve the issue, check the printhead pressure. See Adjusting the Printhead Pressure.
If necessary, call a service technician.
The printhead or platen roller may be installed incorrectly.
Verify, if you can, that they are installed correctly. If necessary, call a service technician.
Ribbon Detection Issues
The printer does not detect when the ribbon runs out.
The printer may have been calibrated without ribbon or without the ribbon loaded properly.
In thermal transfer mode, the printer did not detect the ribbon even though it is loaded correctly.
The printer indicates that ribbon is out, even though ribbon is loaded correctly.
The printer was not calibrated for the label and ribbon being used.