Epson WF-M21000 Series User Manual page 297

Solving Problems
There is dust or dirt on the ADF or originals.
Solutions
Clean the ADF, and remove any dust or dirt that adheres to the originals.
"Cleaning the ADF" on page 210
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The original was pressed with too much force.
Solutions
If you press with too much force, blurring, smudges, and spots may occur.
Do not press with too much force on the original or the document cover.
"Placing Originals" on page 41
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The copy density setting is too high.
Solutions
Lower the copy density setting.
"Basic Menu Options for Copying" on page 109
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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 109
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An Image of the Reverse Side of the Original Appears in the Copied Image
The following causes can be considered.
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Printing, Copying, Scanning, and Faxing Quality is Poor
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297
Copy Quality is Poor