Ricoh R-C4 Service Manual page 225

21 July 2006
4909* IPU Image Data Path
Selects one of the following image data outputs, which will be used for printing.
DFU
[0 ~ 255 / 0 / 1 step]
Bit 7: Shading
Bit 6: Scanner gamma
Bit 5: Pre-filtering
Bit 4: Magnification
Bit 3: Scanner/Printer Mask
Bit 2: Gradation
Bit 1: Filtering
Bit 0: Printer gamma
4920 Scanning (Factory Only) DFU
4930* Sensor Condition
4930 1 Platen Cover sensor
4930 2 Scanner HP Sensor
4999 ADF Scan Glass Dust Check
This function checks the narrow scanning glass of the ADF for dust that can cause
black lines in copies. If dust is detected a system banner message is displayed,
but processing does not stop.
4999 1 Check On/Off Change
Issues a warning if there is dust on the narrow scanning glass of the ADF when the
original size is detected before a job starts. This function can detect dust on the
white plate above the scanning glass, as well as dust on the glass. Sensitivity of
the level of detection is adjusted with SP4999 2.
[0 ~ 1 / 0 / 1]
0:Off. No dust warning.
1:On. Dust warning. This warning does not stop the job.
Note: Before switching this setting on, clean the ADF scanning glass and the white
plate above the scanning glass.
4999 2 Detect Level
Adjusts the sensitivity for dust detection on the ADF scanning glass. This SP is
available only after SP49991 is switched on.
[0~8 / 4/ 1]
If you see black streaks in copies when no warning has been issued, raise the
setting to increase the level of sensitivity. If warnings are issued when you see not
black streaks in copies, lower the setting.
Note: Dust that triggers a warning could be removed from the glass by the
originals in the feed path. If the dust is removed by passing originals, this is not
detected and the warning remains on.
Checks the following sensors in the scanner unit.
[0 = Opened, 1 = Closed]
[0 = Opened, 1 = Closed]
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SERVICE PROGRAM MODE