Gestetner A193 Service Manual page 465

Mode No.
Class
Class 3
1 and 2
MTF Filter
Selection in
Letter Mode -
4-407* 9 Binary picture
mode
(84% ~ 400 %)
AGC Default
4-410* Setting
Video Data
Path
4-412*
IPU Test
Pattern Print
4-417
Threshold
1 Level in Letter
Mode
4-418*
Threshold
Level in
2
Letter/Photo
Mode
Threshold
Level for
1 Marker Mode
(Main scan
magnification)
4-419*
Threshold
Level for
2 Marker Mode
(Sub scan
magnification)
SM
SERVICE PROGRAM MODE TABLE
Function
Selects the MTF filter level for Letter
mode (binary picture mode). A stronger
filter gives sharper lines.
For how to adjust, refer to "Detailed
Descriptions - Filtering and Main Scan
Magnification/Reduction".
Never select "1".
Not used
Do not change the value.
Selects one of the following video data outputs, which will
be used for printing.
0. Normal video processing
1. After auto shading processing
2. After MTF processing
3. After gamma correction
4. Data straight through (no video processing)
Do not change the value.
Prints the test pattern for the IPU or selects one of the
following video data outputs for printing.
0. No Print
1. Grayscale 1
2. Grayscale 2
3. Vertical Bands
4. Vertical Line - 1 dot
5. Vertical Line - 2 dot
6. Grid Pattern
Change to the copy mode display by pressing the
"Interrupt" key, then print the test pattern.
Selects the threshold level for Letter
Mode - Binary picture processing mode
Selects the threshold level for
Letter/Photo Mode - Binary picture
processing mode
Japanese version only.
13-31
Settings
0 ~ 11
1/step
4
- 5 ~ 2
1/step
0
0 ~ 255
1/step
48
0 ~ 255
1/step
240
A224