Ricoh B264 Service Manual page 284

SERVICE PROGRAM MODE TABLES
4020* 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.
4020 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.
4020 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 move 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.
4301 APS Sensor Output Display
Displays the time required to detect the size of the paper on the scanner exposure
glass.
(7) [00011111] (0)
4303* APS A5/LT Size Detection
Determines whether an original of non-standard size is detected as A5/HLT size
by the APS sensor.
0: Non-standard size not detected as A5/HLT
1: Non-standard size detected as A5/HLT LEF
2: Non-standard size detected as A5/HLT SEF
If 0 is selected, "Cannot detect original size" will be displayed.
4305* Original Size Detection
Selects whether or not the copier APS sensor detects the original as 8K/16K or
A4/LT.
0: Normal (APS detects standard sizes)
1: A4 or LT original size detect enabled
1: 8K, 16K paper size detect enabled (For China, Taiwan only)
B264/B265 5-20 SM