Intermec PX4i Thermal Printhead Installation Instructions - Page 5

• 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. • Do not use a higher Contrast 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 original Intermec transfer ribbons or ribbons recommended by Intermec. Always switch off the power while replacing the printhead. The printer must be restarted before it can detect the characteristics of the new printhead.  Thermal Printhead Installation Instructions