Ricoh B230 Training Program page 71

How the SBU Processes the Signal
More about the SBU
You need to adjust the following after you replace the SBU:
SP 4008. Scanner sub-scan magnification
SP 4010. Scanner leading edge registration
SP 4011. Scanner side-to-side registration
Output the VPU test pattern with SP 4907 to make sure the scanner VPU control
functions correctly. Look in the troubleshooting section if you need more details.
Signal processing
•
Signal Amplification
•
Signal Composition
A/D conversion
White level correction
Black level correction
Others
•
The SBU controller exchanges the R and B signals if the original
is scanned with the ARDF.
•
The properties of the scanner unit, (necessary for controlling the
scanner VPU (video processing unit)), are stored in the NVRAM
on the controller.
•
SBU test mode
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