Ricoh D146 Service Manual page 1229

Main SP Tables - 4
GO
Displays black level scanning value (GREEN/EVEN pixel).
Black level check is done when scanner powers ON, then offset level of image
signal is checked and that value will be given.
002
Check whether the offset adjustment of SBU (SCAT) is working correctly.
Gives SC141-00 if the black level scanning value is an error.
Cause of error will be displayed on SP4-646-001.
Use for design evaluation/analyzing cause of malfunction (abnormal image,
SC).
[Black Level Peak Read]
4695
-
BE
Displays black level scanning value (BLUE/EVEN pixel).
Black level check is done when scanner powers ON, then offset level of image
signal is checked and that value will be given.
001
Check whether the offset adjustment of SBU (SCAT) is working correctly.
Gives SC141-00 if the black level scanning value is an error.
Cause of error will be displayed on SP4-646-002.
Use for design evaluation/analyzing cause of malfunction (abnormal image,
SC).
BO
Displays black level scanning value (BLUE/ODD pixel).
Black level check is done when scanner powers ON, then offset level of image
signal is checked and that value will be given.
002
Check whether the offset adjustment of SBU (SCAT) is working correctly.
Gives SC141-00 if the black level scanning value is an error.
Cause of error will be displayed on SP4-646-002.
Use for design evaluation/analyzing cause of malfunction (abnormal image,
SC).
D146/D147/D148/D149/D150
ENG [0 to 1023 / 0 / 1digit/step]
ENG [0 to 1023 / 0 / 1digit/step]
ENG [0 to 1023 / 0 / 1digit/step]
2-510 System Maintenance Section