Epson CX6500 Reference Manual page 244

Follow the on-screen instructions to align the print
head.
For Mac OS 9
Follow the steps below to align the print head using the Print Head Alignment utility.
Make sure that Letter-size plain paper is loaded in the sheet feeder and that the adjust lever is set
to the position.
Make sure that the CX6500 is on and ! Error lights is
off.
Access the Print or Page Setup dialog
box.
Accessing the Printer Software for Mac OS
9
Click the
button.
Follow the on-screen instructions to align the print
head.
For Mac OS X
Follow the steps below to align the print head using the Print Head Alignment utility.
Utility icon button, then click the Print Head Alignment
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