Ricoh R-C4 Service Manual page 222

SERVICE PROGRAM MODE
4901 SBU Adjustment
4901 1 Gain – Even DFU
Checks the difference value of the black level for the EVEN channel after adjusting
the black level at power-up. However, after doing a memory all clear (SP5801),
use it to re-input the previous value.
[0 ~ 255 / 40 / 1/step]
4901 2 Gain – Odd DFU
Checks the difference value of the black level for the ODD channel after adjusting
the black level at power-up.. However, after doing a memory all clear (SP5801),
use it to re-input the previous value.
[0 ~ 255 / 40 / 1/step]
4901 3 Black Level – Even DFU
Displays the coefficient of the D/A converter for the DC cont AGC gain curve for
the EVEN channel.
4901 4 Black Level - Odd DFU
Displays the coefficient of the D/A converter for the DC cont AGC gain curve for
the ODD channel.
4901 5 White Level: EVEN DFU
Displays the result of white level adjustment for the EVEN channel after automatic
density level adjustment is done after the machine is switched on.
4901 6 White Level: ODD DFU
Displays the result of white level adjustment for the ODD channel after automatic
density level adjustment is done after the machine is switched on.
4901 7 Ref. Cont DFU
Displays and allows adjustment of the coefficient of the D/A converter for the AGC
gain curve for scanning the white plate. After doing a memory all clear (SP5801),
use it to re-input the previous value.
[0 ~255 / 147 / 1/step]
4902 Exposure Lamp ON
Turns on the exposure lamp.
Press ON on the touch panel to turn on the lamp. Press OFF to turn off the lamp.
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21 July 2006