Epson Stylus Scan 2500 User Manual page 152

You see vertical banding or misalignment.
Make sure the print head nozzles are not clogged. To run a
cleaning cycle, see "Cleaning the Print Head" on page 126.
Run the Print Head Alignment utility. See "Aligning the
Print Head" on page 129 for instructions.
Make sure the printable side of the paper is face up. It is
usually whiter or shinier.
Don't use the setting in the printer software.
High Speed
Set the paper thickness switch to the position.
0
paper thickness switch
Place the EPSON Stylus Scan on a stable, level surface.
Make sure none of the five rubber feet is missing from the
bottom.
Solving Problems
146