Intermec EasyCoder PF2i Service Manual page 104

Chapter 7—Print Mechanism
Precautions
96
• Disconnect the two cables from the printhead. Note the snap-lock on
the inner connector. Pull at the connectors, not at the cables!
• Connect the two cables to the replacement printhead.
• Put back the printhead in reverse order and check that the printhead
cables run freely.
• Lower the printhead so the magnet engages the printhead bracket.
• Switch on the power. The printer's fi rmware automatically measures the
printhead resistance and density at startup.
• Load the media (and ribbon) again.
Some simple measures can be taken by the user to prevent premature wear-
out:
• Clean the printhead regularly, as described in the User's Guide. Not only
will a dirty printhead produce an inferior printout, but any residue on
the dots will prevent heat to dissipate through the media.
• Follow the Intermec's recommendations regarding Paper Type or Media
Sensitivity setup. Too much energy to the printhead will wear it out
rapidly.
• Do not use higher Print Speed setting than necessary.
• Low ambient temperature requires more energy to the printhead
dots than room temperatures and will therefore cause more wear to
the printhead. High print speed accelerates the wear. Thus, at low
temperatures, select as low a print speed as acceptable.
• In Fingerprint, do not use a higher Contrast setting than necessary,
especially not in combination with the highest Label Constant or
Ribbon Constant settings.
• In IPL, do not use a higher Darkness setting than necessary.
• Do not use a higher printhead pressure than necessary.
• Never print outside the media path. Dots that are not in contact with
the media will not be cooled properly.
• When using media with less than full width, be careful to adjust the
printhead lift arm so there is an even pressure across the media. Not
only will an uneven pressure impair the printout quality, but it may also
prevent the dots from being properly cooled. Moreover, a sharp outer
media edge in direct contact with the printhead may cause excessive
mechanical wear on some dots, which may be visible when printing on
wider media later.
• When using preprinted labels or labels with some type of varnish or
non-standard top coating for direct thermal printing, use original
Intermec labels or inks recommended by leading manufacturers of direct
thermal media. The labels must not contain any aggressive substances
such as chloride or grinding substances such as titanium dioxide.
• Only use transfer ribbons recommended by Intermec.
Intermec EasyCoder PF2i, PF4i, and PF4i Compact Industrial—Service Manual