Epson WF-7840 Series User Manual page 253

Solving Problems
The copy density setting is too high.
Solutions
Lower the copy density setting.
"Basic Menu Options for Copying" on page 89
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Moiré (Cross-Hatch) Patterns Appear in the Copied Image
If the original is a printed document such as a magazine or a catalog, a dotted moiré pattern
appears.
Solutions
Change the reduce and enlarge setting. If a moiré pattern still appears, place the original at a slightly
different angle.
"Basic Menu Options for Copying" on page 89
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An Image of the Reverse Side of the Original Appears in the Copied Image
The following causes can be considered.
When scanning thin originals, images on the back may be scanned at the same time.
Solutions
Place the original on the scanner glass and then place a piece of black paper over it.
"Placing Originals" on page 37
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The copy density setting is too high.
Solutions
Lower the copy density setting.
"Basic Menu Options for Copying" on page 89
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Printing, Copying, Scanning, and Faxing Quality is Poor
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Copy Quality is Poor