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Cleaning the ADF pickup roller
When the Auto Document Feeder has failed to feed paper, open the ADF cover, and wipe away the
roller with a wet, well-wrung cloth and remove paper dust.
Cleaning the document table and the exposure window for Auto Document
Feeder
If a line of dots always appears in your scanned images, fax images, or copies, the document table or
exposure window for Auto Document Feeder may be dusty or scratched. Clean those parts.
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document table
Epson AcuLaser MX21/MX20 Series User's Guide
Cleaning and Transporting the Printer
203