HP Designjet T2500 eMultifunction Printer series - Manual (Page 232)

Alignment
Looking at patterns 4, 13, and 14, you may find problems with the printer’s printhead alignment, which can
cause defects such as the following.
Additionally, misalignment problems can be seen in patterns 4 and 9 in the form of color fringing (which is
exaggerated below, on the right). That is, the limits between two strong colors are not well defined or a third
color appears between them.
Finally, a special pattern for checking the printer’s printhead alignment can be found at the top left of the
diagnostic sheet. This pattern has no number as it is not used for scanner checking. It is made of three
222 Chapter 24 The scanner diagnostic plot ENWW