Ricoh Aficio 480W Dolphin-C2 Service Manual page 231

SP (SERVICE PROGRAM) MODE TABLES
4020 Scan Glass Dust Check
These SP codes adjust the dust check operation at the CIS and white platen roller.
Note: Dust that triggers a warning could be removed from the glass by the original in
the feed path. If the dust is removed by passing originals, this is not detected and
the warning remains on.
001 Check On/Off
002 Detect Level
003 Rejection Level
4101 Scanner Main Scan
Magnification
4550 Scanner: Text: Print
Sets the MTF (Modulation Transfer Function) level. When the CCD converts the
original image to electrical signals, the contrast is reduced due to the influence that
adjacent white and black pixels have on one another as a result of lens properties.
Typically, you will see very narrow width and spacing between black and white areas.
MTF corrects this problem and emphasizes image detail.
For each adjustment below:
• Weak: Low end of the range (0)
• Medium: Center of the range (default)
• Strong: High end of the range.
001 MTF Filter Level: Main Screen
002 MTF Filter Level: Sub Scan
003 MTF Filter Strength: Main Scan
004 MTF Filter Strength: Sub Scan
005 Smoothing Filter
006 Brightness
007 Contrast
008 Isolated Dot Removal
Switches the dust warning on and off. When this SP is
on, a warning is issued if the check detects dust at the
CIS or on the white platen roller. Always clean the CIS
and white platen roller before turning this SP on.
0:Off, 1:On
Adjusts the sensitivity of the check. If you see black
streaks in copies when no warning has been issued,
raise the setting to increase the level of sensitivity. If
warnings are issued when you see no black streaks in
copies, lower the setting.
[0~8/1]
Sets the level for vertical line correction caused by dust.
A high setting can eliminate unwanted vertical lines
caused by dust but it can also reproduce vertically lines
thinner than those of the original.
[0~7/1]
Adjusts the side-to-side scan magnification.
[-0.9~+0.9/0.1 %]
[0~15/1]
[0~7/1]
[1~255/1]
[0~7/1]
5-54
28 April 2005