Epson WorkForce Pro WF-C878RB User Manual page 275

Solving Problems
The paper type setting does not match the paper loaded.
Solutions
Select the appropriate paper type setting for the type of paper loaded in the printer.
"List of Paper Type" on page 37
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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 168
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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 168
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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.
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Printing, Copying, Scanning, and Faxing Quality is Poor
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Copy Quality is Poor