Ricoh B246 SERIES, Manual, Page: 116 / 268

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Dust Detection (SP 4020)
„
This function checks the ADF exposure glass for dust that can
cause black lines in copies.
„
If dust is detected, a message is displayed on the operation
panel, but the machine does not stop.
„
SP 4020 001: Enable/disable (default – disabled)
„
SP 4020 002: Sensitivity adjustment
„
SP 4020 003: Adjusts image processing parameters to remove
thin vertical lines caused by dust
z
A speck of dust on the ADF exposure glass causes a thin
vertical line on the scanned image. This is because the ADF
feeds the paper over the exposure glass during scanning. Dust
on the glass appears on each line of the scanned image.
„
SP 7852: Counts how many times the machine detected dust
on the ADF.