Ricoh B079 - Page 246

SERVICE PROGRAM MODE TABLES
B079/B082 5-20 SM
SP4 Mode Number Function and [Setting]
4903* Filter Setting
5
Full Size Mode Selects whether the copy is always full size, even
if the magnification ratio has been changed. Set
to 1 to check the main scan magnification. If the
magnification is not 100%, the image processing
circuits could be malfunctioning.
[0~1 / 0 / 1 step]
0: No. Normal operation
1: Yes. Main scan magnification always full-size.
This SP is used to determine whether
magnification is operating correctly. If this SP is
set to 1 can make it easier to determine which
part of the IPU is malfunctioning.
7
Image Shift in Magnification Adjusts the amount of pixel shift in the main scan
direction in the magnification mode. DFU
[0~7199 / 0 / 1 step]
8 Fax 25%, 50% Reduction Determines whether 25% and 50% reduction is
available in the fax mode. DFU
[0~3 / 1 / 1 step]
0: Off
1: Conducts fax mode OR processing for main
scan for resolution below 100 dpi in only Text
mode.
2: Conducts pre-filter processing for fax mode.
3: Conducts fax Text mode OR processing for
main scan for resolution below 100 dpi. Pre-
filter processing is done in every mode except
Fax Text mode.
10*
Pre-Filter: Text Selects the filter processing setting for smoothing
in order to reduce the incidence of moiré in
images. Specifically, it sets 1) the compression
rate for parallel lines in the main scan direction
and for long lines in the sub scan direction, and 2)
the strength of smoothing. See below.
Enter the appropriate number with the10-key pad
then press .
[0~9 / 0 / 1]
These settings attempt to smooth lines without
making them standout. Increasing the strength of
a setting can reduce the incidence of moiré but
can also decrease sharpness.
12*
Pre-Filter: Photo Mode Selects the Pre-Filter coefficient in the main scan
direction for photo mode. (! Chap.6, “Image
Processing”.
[0~9 / 0 / 1 step]
13*
Pre-Filter: Text/Photo Selects the Pre-Filter coefficient in the main scan
direction for text/photo mode, and emphasizes
lines parallel to the direction of feed. (! Chap.6,
“Image Processing”.
[0~9 / 0 / 1 step]
Increasing this value strengthens smoothing but
can also increase the occurrence of moiré and
reduce sharpness.
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