Ricoh V-C3 Technical Training Manual page 276

! 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
" A speck of dust on the ADF exposure glass
! SP 7852: Counts how many times the machine
detected dust on the ADF.
Slide 276
No additional notes
Dust Detection (SP 4020)
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.
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V-C3 Training