Ricoh A229 Service Manual page 258

Mode No.
(Class 1 , 2 & & & & 3)
4-904 IPU Setting -1
12 Binary Thresh
Level
18 Binary Dither
Pattern
(Number of
lines)
23 Binary Error
Diffusion
Pattern
24 Grayscale
Process -
Photo Mode
4-905 Image Data Path
1 Image Data
Path –
Filtering/Magni
fication
2 Image Data
Path –
Gradation
4 Printout Type
Selection
4-906 Image Processing Priority in Text/Photo Mode
4-907 Text/Photo Auto Separation Method
SM
Function
* Not used in this machine
Do not change the value.
* Not used in this machine
Do not change the value.
* Not used in this machine.
Do not change the value.
* Select the processing type in photo mode.
0: 2-dot/1-dot error diffusion (text/photo separation)
1: 2-dot error diffusion
2: Dither processing
This SP is ignored unless the user selects 'SP Mode
Changed' in UP mode.
Selects one of the following video data outputs, which will be
used for printing.
0: Filtering → Magnification
1: Magnification → Filtering
2: Filtering only
3: Magnification only
4: No processing
5: Normal operation
Do not change the value.
Selects one of the following video data outputs, which will be
used for gradation processing.
0: After image scanning 1: After DRAM
2. No printer gamma
Do not change the value.
Selects one of the following video data outputs, which will be
used for the printer controller.
0: Normal operation
2: Black/white conversion
Do not change the value.
* Selects either text priority or photo priority
for text/photo mode.
Photo priority: Background erase is off
Letter priority: Background erase is on.
This SP is ignored unless the user selects
'SP Mode Changed' in UP mode.
* Selects whether auto text/photo separation
is done before error diffusion in text/photo
mode.
This SP is ignored unless the user selects
'SP Mode Changed' in UP mode.
4-29
SERVICE PROGRAM MODE
Settings
0 ~ 255
1/step
128
0: 70 (8x8)
1: 95 (6x6)
2: 140 (8x8)
3: 180 (8x8)
0: Matrix 1
1: Matrix 2
3: Normal operation
1: Not printed out
0: Photo
priority
1: Letter
priority
0: No
1: Yes
A229