Ricoh B121 Service Manual page 193

Standard Vt
2926*
2926 1 [0.00 ~ 5.00 / 2.50 / 0.01 V/step] DFU
Adjusts Vts (the Vt value for new developer). The TD sensor output is adjusted to
this value during the TD sensor initial setting process]. This SP is effective only
when SP2-921 is "0", "1", or "2".
2927* ID Sensor Control
2927 1 [0 = No / 1 = Yes]
Selects whether the ID sensor is or is not used for toner density control. This value
should normally be left at "1". If the value is "0", dirty background may occur after
long periods of non-use.
2928 Toner End Clear
2928 1 Clears the toner end condition without adding new toner. The following are cleared:
• Toner end indicator (goes out)·
• Toner near-end counter
• Toner near-end level
This function should generally not be used. If you clear the toner end condition
without adding new toner, there is a risk that the drum may eventually begin to
attract carrier after many more copies are made and toner runs out. This attracted
carrier may damage the drum.
Vref Limits
2929*
Adjust the upper or lower Vref limit.
2929 1 Upper
2929 2 Lower
ID Sensor Detection Temperature
2994*
2994 1 While the machine is recovering from an energy saver mode, or while the machine
starts, the controller ignores the ID-sensor signals if the fusing temperature is at the
specified value or higher.
2996* Transfer Roller Cleaning
2996 1 Selects whether the transfer roller is cleaned before each copy job. Set this to "1" if
dirty background is appearing on the reverse side of the first page of copy jobs.
Note that this will increase the time required to generate the first copy. If the setting
is "0", the transfer roller is never cleaned (
Main Scan Magnification
2998*
2998 1 Adjusts the magnification along the main scan direction, for all print modes (copy,
fax, printing). The specification is 100 ± 1.0% (
SM
SERVICE PROGRAM MODE
[0.50 ~ 3.50 / 3.20 / 0.01V/step] DFU
[0.50 ~ 3.50 / 0.70 / 0.01V/step] DFU
[30 ~ 90 / 30 / 1 °C/step]
6.12.3).
[–0.5 ~ +0.5 / 0.0 / 0.1%/step]
3.13.1).
5-33 B121 Series/B259 Series