Intermec EASYCODER 7421 - Manual (Page 47)

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This chapter contains cleaning procedures and a schedule detailing
how often to perform maintenance procedures. You must clean the
7421 printer on a regular basis to keep it running at its highest
performance level.
It is very important to perform the maintenance procedures if you
expose the printer to dirt or debris.
Maintenance Schedule
Clean your printer regularly to maintain the print quality of your
labels and extend the life of your printer. This table contains
suggestions for cleaning the printer. Use the following
illustration to locate the parts you need to clean.
Printer Component Maintenance Period
Printhead Inspect after every roll of media or ribbon.
Clean after every roll (1,800 inches or 46
m) of media or more often if necessary.
Printer Cover Clean as necessary.
Drive roller and peel-off
bar
Label gap sensor
Label mark sensor
Label taken sensor
Clean after every five rolls of media. If
you are using hi-tack adhesive, you must
clean these parts after every roll of media.
If you are using tag stock or continuous
media, you may want to clean the parts
after every five rolls of media or as
necessary. Clean these parts more often in
environments that are harsh or dusty.