Ricoh R-C4 Service Manual page 221

21 July 2006
4623* Black Level Adj. 1 DFU
Displays the DAC value of black offset correction.
4623 1 Rough: Even
4623 2 Rough: Odd
4623 3 Fine: Even
4623 4 Fine: Odd
4624* Black Level Adj. 2 DFU
Displays the DAC value of black offset correction.
4624 1 Rough: Even
4624 2 Rough: Odd
4624 3 Fine: Even
4624 4 Fine: Odd
4646* SBU Adjustment Error
Use this SP to determine whether the automatic scanner adjustment loop has
exceeded the prescribed number of loops and flagged a timeout. The position
of the bits that display "1" tell you where the error has occurred.
Bit No.
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 7
4800 Black Level Adjustment Mode DFU
This SP switches the black offset compensation mode on and off. Black offset
correction is done during automatic image density correction (ADS).
Note: This SP operates only if the black offset correction circuit is built into the
SBU.
0: Off
1: On
[0~255/128/1]
[0~255/128/1]
Where the Error Occurred
White Level
Black Level Adj 1
Black Level Adj 2
Black Level
SBU
Reference Adjustment
5-33
SERVICE PROGRAM MODE