Epson WF-C5890 Series User Manual page 316

Solving Problems
Blurry Copies, Vertical Banding, or Misalignment
The following causes can be considered.
The print head position is out of alignment.
Solutions
Align the print head using the Print Quality Adjustment feature.
"Adjusting the Print Quality" on page 263
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The bidirectional printing setting is enabled.
Solutions
If print quality does not improve even after aligning the print head, disable the bidirectional setting.
During bidirectional (or high speed) printing, the print head prints while moving in both directions, and
vertical lines may be misaligned. Disabling this setting may slow down printing speed but improve print
quality.
Select Settings > General Settings > Printer Settings, and then disable Bidirectional on the control
panel.
Printout Comes Out as a Blank Sheet
The print head nozzles may be clogged.
Solutions
Use the Print Quality Adjustment feature. If you have not used the printer for a long time, the print head
nozzles may be clogged and ink drops may not be discharged.
"Adjusting the Print Quality" on page 263
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Printing, Copying, Scanning, and Faxing Quality is Poor
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Copy Quality is Poor