Ricoh D146 Service Manual page 1177

Main SP Tables - 4
4417 [IPU Test Pattern]
Test Pattern
001
Selects test pattern packaged with IPU ASIC.
Pattern is for design purpose, content of pattern will be omit,
4429 [Select Copy Data Security]
Copying
001
Switches unjust copy output pattern density for copy. As the value enlarges,
gets deeper.
Scanning
002
Switches unjust copy output pattern density for scan. As the value enlarges,
gets deeper.
Fax Operation
003
Switches unjust copy output pattern density for fax. As the value enlarges, gets
deeper.
4450 [Scan Image Pass Selection]
Black Subtraction ON/OFF
001
Switches IPU Scanner image pass ON/OFF (black reduction).
Use to evaluate design, analyze cause of malfunction (image error).
D146/D147/D148/D149/D150
[0 to 8 / 0 / 1/step]
0: Scanned image
1: Gradation main scan A
2: Patch 16C
3: Grid pattern A
ENG
4: Slant grid pattern B
5: Slant grid pattern C
6: Slant grid pattern D
7: Scanned+Slant Grid C
8: Scanned+Slant Grid D
*ENG [0 to 3 / 3 / 1/step]
*ENG [0 to 3 / 3 / 1/step]
*ENG [0 to 3 / 3 / 1/step]
[0 or 1 / 1 / 1/step]
*ENG 0:OFF
1:ON(Normal)
2-458 System Maintenance Section