Zebra Technologies R402 manual Print Quality Problems, No print on the label

Print Quality Problems

No print on the label.

■You must use the correct media for the method of printing you require. When printing without a ribbon, you must use direct thermal media. When using ribbon, you must use thermal transfer media. The printer's ribbon sensor detects motion of the supply spindle.

■Is the media loaded correctly? Follow the instructions in “Loading the Media” on page 9.

The printed image does not look right.

■The print head is dirty. Clean the print head according to the instructions on page 41.

■The print head is under temperature.

■Adjust the print darkness and/or print speed. Refer to the six-flash sequence in “Feed Button Modes” on page 52, or the ^PR and ~SD commands in the ZPL II Programming Guide.

■The media being used is incompatible with the printer. Be sure to use the recommended media for your application, and always use Zebra-approved labels and tags.

There are long tracks of missing print (blank vertical lines) on several labels.

■The print head is dirty. Clean the print head according to the instructions on page 41.

■The print head elements are damaged. Replace the print head (see “Replacing the Print Head” on page 40).

The ribbon sensor settings did not print.

■The printer is set for direct thermal printing; use the ^XA^MTT^XZ command to reset the printer for thermal transfer printing and calibrate again.