Ricoh MP C2504 Field Service Manual page 1116

[A]: Sheet
[B]: Sheet-through exposure glass
[C]: Read position
[D]: Document
• Contact scanning
As the document comes in contact with the sheet-through exposure glass this is useful for dealing
with adhesion of free dirt particles (paper scraps, etc.). (Self-cleaning mechanism using paper)
On the other hand, sticky dirt adhering to the document sticks to the sheet-through exposure glass,
and may give rise to the appearance of black lines.
ADF cross-section diagram, contact scanning
[A]: Sheet-through exposure glass
[B]: Read position
[C]: Document
Scanning
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