Removing Vertical White Lines During Duplex Scanning - Ricoh B064 SERIES Service Manual

Removing Vertical White Lines During Duplex Scanning

During duplex scanning, the CCD
scans the front side and the CIS
scans the rear side. In Text, Pale,
or Generation Copy mode, when
there are halftones (such as
photos) on the rear side, vertical
white lines may appear in these
areas. This is because of gaps at
the junctions between blocks of
elements in the CIS (there is a
junction every 25 mm). If this
occurs, adjust SP4902 010~014
(Image Adjust Mode – Back Side
Scan). Increasing the value
reduces the white stripes, but could
reduce resolution slightly.
Otherwise, try using Text/Photo
mode.
NOTE: Each original mode has a
separate adjustment.
SM
CÓPIA NÃO CONTROLADA
Duplex Scan Mode
Back Side Has White Stripes
in Halftones?
White Stripes on Back Side Gone
After Adjusting SP4902 010~014?
Duplex Scan Mode
Image Quality of Front/Back
Sides Differnt?
Equal Image Quality Restored After
Adjusting With SP4901 010~014
Simplex Scan Mode
Front Side And Duplex Scan
Front Side Image Quality
Equal Quality Restored After
Adjusting with SP4901 019?
*1: Front Side Quality Adjustment
*2: Rear Side Quality Adjustment
*3: Simplex/Duplex Front Side Quality Adjustment
6-45
CÓPIA NÃO CONTROLADA
IMAGE PROCESSING
Different?
B064 Series/B140 Series
/B246 Series/D052 Series
*1
*2
*3
END
B246D818.WMFF