Ricoh Aficio 220 Service Manual page 193

SERVICE PROGRAM MODE
Mode No.
Class Class
1 and 2 3
Image Mode
Selection
4-401*
IPU Image Data
Path
4-412*
IPU/SBU Test
Pattern
4-417
Exposure Lamp ON
4-902
SBU Gain
Adjustment
(EVEN)
4-904 1*
Function
Selects whether the binary processing is
always used in Positive/Negative mode.
0: The machine uses the process selected
by the user with user tools.
1: The machine always uses binary picture
processing; greyscale processing is
disabled.
Selects one of the following video data
outputs, which will be used for printing.
0. N: Normal video processing
1. S: After auto shading processing
2. M: After magnification processing
3. F: After MTF processing
4. G: After gamma correction
5. T: Data straight through (no video
processing)
Do not change the value.
Prints test patterns from the IPU or SBU
video data outputs. (1 ~ 13: IPU, 14 ~ 16:
SBU)
0. No Print
1. Vertical Line - 1 dot
2. Horizontal Line - 1 dot
3. Vertical Line - 2 dot
4. Horizontal Line - 2 dot
5. Alternating Dot Pattern
6. Grid Pattern - 1 dot
7. Vertical Bands
8. Grayscale - Horizontal
9. Grayscale - Vertical
10.Patch Pattern
11.Cross Pattern
12.Slant Pattern
13.Trimming Area
14.Vertical Line - 2 dot
15.Grid Pattern - 2 dot
16.16-grayscale
Change to the copy mode display by
pressing the M (Interrupt) key, then print
the test pattern.
Turns on the exposure lamp.
To turn off the exposure lamp, select "0".
Checks the difference value of the black
level for the EVEN channel after adjusting
the black level at power-up.
Do not change the value.
However, after doing a memory all clear
(SP5-801), use it to re-input the previous
value.
4-26
20 September 1999
Settings
0: System
1: Binary
0: No (Off)
1: Yes (On)
0 ~ 255
1/step
40