Ricoh Aficio MP 3500 Series, Service Manual

Page: 437 / 908

IMAGE PROCESSING
SM 6-35 B291/B295/B296/B297
Detailed
Des
cription
s
Photo Mode
Dithering or Error Diffusion for Photo Mode
Use SP4904 001 to select either dithering or error diffusion to process image fills
and halftones.
0: Selects the dithering and smoothing filter.
1: Selects the error diffusion and MTF filter.
Photo Mode Dithering: SP4904 001 = 0
If you select “0” for SP4904 001 to enable dithering halftones, only one SP code is
available for fine adjusting dithering.
SP4903 037 Smoothing Filter in Photo Mode
Photo Mode Error Diffusion: SP4904 001 = 1
If you select “1” for SP4904 001 to enable error diffusion, all the SP codes in the
Mode tables below (Text Mode, Text/Photo Mode, etc.) are available for
adjustment.
Use the
master SP codes gross adjustment of the image processing mode after
you have set SP4904 001 = 1 for error diffusion. If you need to fine adjust a master
setting, set the master setting to “0” to access its slave SP codes.
Adjust the image for the Photo mode with the one master setting within its allowed
range (for the range, see Section “5. Service Tables”). To fine adjust the master
setting set it to “0” then perform the adjustments listed below.
SP4904 024 = 0 Photo (General Quality)
SP4903 036 Photo MTF (Edge)
SP4903 038 Photo MTF (All)
SP4903 091 Filter Strength: Photo (Edge)
SP4903 092 Filter Adj.: Photo (Edge Det.)
SP4903 093 Filter Adj.: Photo (Mag.%)
SP4904 013 Halftone Adjustment: Edge Detection
NOTE: An SP code number and name set in bold italic denotes an SSP (Special
Service Program) mode. To access an SSP, enter the SP mode: press and
hold down
"
on the 10-key pad then “Copy SP” on the touch-screen.
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