Aligning The Print Head - Epson Stylus COLOR 640 Setup And Daily Use

If print quality hasn't improved after repeating this procedure
four or five times, one or both of your ink cartridges may be old
or damaged and may need to be replaced. To replace an ink
cartridge before it is empty, see "Replacing an Old or Damaged
Ink Cartridge" in the online Reference Guide.
If the print quality still has not improved after replacing the ink
cartridges, contact your dealer.

Aligning the Print Head

If you notice a misalignment of vertical lines, you may be able to
solve this problem from your computer using the Print Head
Alignment utility in your printer software.
Note:
Do not start the Print Head Alignment utility while printing is in
progress; otherwise your printout may be marred.
1. Make sure paper is loaded in the sheet feeder.
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2. Access the printer software window. If you need instructions,
see "Accessing the printer software" in the online Reference
Guide.
3. Click the Utility tab, then click the Print Head Alignment
button.
4. Follow the messages on your screen to align the print head.
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Caution:
Use paper at least 210 mm (8.27 inches) wide; for example,
A4 size paper loaded short edge first. Otherwise, the print
head will spray ink directly onto the platen.