"Worksheet","A line appears only in feeder scans: compare the acquisition paths","Evidence status","Your configuration"
"Purpose","Compare the same permitted original through the flatbed and feeder where supported. A defect confined to one path narrows the investigation, but follow the model’s cleaning instructions before touching scanner surfaces.","Proposed workflow",""
"Check","Question to record","Decision","Your observation"
"Original","Visible source defect","Already present before capture",""
"Saved scan","Digital stripe or line","Acquisition or processing candidate",""
"Printed copy","Defect added only on paper","Print path remains a candidate",""
"Example","In an illustrative case, a feeder scan has a vertical line while the flatbed scan of the same page is clean. That supports investigating the feeder scanning path. It does not identify a particular part from appearance alone or justify applying an unspecified solvent.","Illustrative; not a measured product result",""
"Source","https://files.support.epson.com/docid/cpd6/cpd60206/helpcontents.html","Official references; scope in article",""
"Result","Accepted / unresolved / needs correction","Record date and configuration",""