Ricoh Aficio 401 - Page 27

Mode No. Function Settings
Class 1 Class 2
4903
7 *
GA 3 Setting
(Main Shift
High)
Changes the image shift amount for the
main scan direction in magnification mode.
0 ~ 255
1 /step
0
8 *
GA 3 Setting
(Main Shift
Low)
Do not change the values of 4903-7
and 4903-8.
9 *
GA 3 Setting
(Switch
Separation)
Changes the threshold ratio for auto
text/photo separation processing.
25 ~ 255
1 %/step
170 %
This is used only in the Japanese model.
4904 *
1 *
GA4 Setting
(Laser Pulse
Positioning)
Selects whether LD PWM laser pulse
positioning feature is performed or not.
0: OFF
1: ON
If "OFF" is selected, the copier always
uses the "center" setting (pixels will
always have a small separation).
2 *
GA4 Setting
(Photo Matrix)
Selects the matrix size for photo mode. 0: 4 x 4
1: 6 x 6
2: 8 x 8
3: 6 x 6 (New)
• 8 x 8 is only used if 4904-4 is set to
"binary". Also, if 4904-4 is set to binary,
4904-2 will be ignored if the setting is
other than 8 x 8.
•
6 x 6 (New) should be selected when a
light original is used.
• 4 x 4 leads to a sharper image.
3 *
GA4 Setting
(Filter Select
in Photo
Mode )
Selects either the MTF filter or the
smoothing filter in Photo mode.
0: MTF filter
1: Smoothing
filter
The strength of the MTF filter can be
selected with SP4903-1, bit 1.
The strength of the Smoothing filter can
be selected with SP4903-1, bit 0.
If you select the MTF filter, the image
resolution is improved. However, the dot
screen areas will be faint.
4 *
GA4 Setting
(Binary
Process
Mode)
Selects whether binary picture processing
mode is performed or not.
0: NO
1: YES
If "YES" is selected, all image processing
modes are handled using binary picture
processing mode.
6
GA4 Setting
(Generation
Mode)
Selects the line width correction type in
the generation mode.
0: Not
corrected
1: Thin line-1
2: Thin line-2
3: Thick line
In generation mode, lines may bulge in
the main scan direction. Adjust this SP
mode until the result is satisfactory.
7
GA4 Setting
(Image
Process mode
in Letter/
Photo mode:
Letter areas)
Selects the image processing mode used for Letter areas
in Letter/Photo mode.
0: 1 x 1 dot processing
1: Error diffusion with 1 x 1 dot processing
2: 2 x 1 dot processing
3: Error diffusion with 2 x 1 dot processing
A larger value cases the image to became lighter.
Only works if 4904-4 is at 0.
SERVICE PROGRAM MODE TABLES 25 April 1997
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