Ricoh D146 Service Manual page 1217

Main SP Tables - 4
4658 [Analog Gain Adjust]
Latest: R Color
Displays analog gain adjustment value (RED pixel).
White level adjust is done when scanner powers ON to keep the dynamic range
of image signal.
001
Image signal will be amplified or attenuated with white level adjust, therefore
gain adjust will be done by ASIC (SCAT) of SBU hardwarely, and adjusted value
will be given.
Use for design evaluation/analyzing cause of malfunction (abnormal image,
SC).
4659 [Analog Gain Adjust]
Latest: G Color
Displays analog gain adjustment value (GREEN pixel).
White level adjust is done when scanner powers ON to keep the dynamic range
of image signal.
001
Image signal will be amplified or attenuated with white level adjust, therefore
gain adjust will be done by ASIC (SCAT) of SBU hardwarely, and adjusted value
will be given.
Use for design evaluation/analyzing cause of malfunction (abnormal image,
SC).
4660 [Analog Gain Adjust]
Latest: B Color
Displays analog gain adjustment value (BLUE pixel).
White level adjust is done when scanner powers ON to keep the dynamic range
of image signal.
001
Image signal will be amplified or attenuated with white level adjust, therefore
gain adjust will be done by ASIC (SCAT) of SBU hardwarely, and adjusted value
will be given.
Use for design evaluation/analyzing cause of malfunction (abnormal image,
SC).
D146/D147/D148/D149/D150
*ENG [0 to 14 / 0 / 1digit/step]
*ENG [0 to 14 / 0 / 1digit/step]
*ENG [0 to 14 / 0 / 1digit/step]
2-498 System Maintenance Section