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You may need to clean the printhead, sensor, and platen roller:
if there is any adhesive
after printing approximately 3 rolls of thermal transfer/thermal direct/linerless supplies or after each ribbon.
daily if your printer is in an excessively dirty, hot, or humid environment.
Voids
when you see voids or streaking in the print as shown.
When you are using higher speeds (with 203 or 300 dpi), and/or increased print contrast, we
recommend cleaning the printhead after eachStreaks ribbon with isopropyl alcohol. If you still notice
your supply, use the enclosed printhead
1.Turn off the printer and open the cover and printhead assembly.
2.Remove the label roll and ribbon (when cleaning the printhead).
3.Press down on the exit cover tabs to open the exit cover on the front of the printer.
Exit Cover