HP 4620 - Manual (Page 137)

Large Black Font Text
Look at the large-font text above the color blocks. I ABCDEFG The type should be
sharp and clear. If the type is jagged, try aligning the printer. If there are streaks or
smears of ink, clean the printhead. For more information, see Clean the printhead.
Example of good Large-Font
Type The letters are sharp and clear - the printer is operating
correctly.
Example of bad Large-Font Type The letters are jagged - align the printer.
Example of bad
Large-Font Type The letters are smeared - clean the printhead and check if the paper is
curled. To avoid curl, store all paper flat in a resealable bag.
Example of bad
Large-Font Type The letters are ragged on one end - clean the printhead. If this defect
occurs right after a new black cartridge is installed, the printer's automatic
servicing routines may solve the problem in a day or so, using less ink than
a printhead cleaning.
Alignment Patterns
If the color bars and large font text look OK, and the ink cartridges are not empty, look
at the alignment pattern directly above the color bars.
Example of a good alignment pattern The lines are straight.
Printhead maintenance 133