Ricoh B121 Service Manual page 169

Toner Supply Rate
2925*
2925 1 Adjusts the toner supply time for fixed toner supply mode. This setting is effective
only if SP2-921 is set to "2" or "3".[0 ~ 7 / 0]t = 200ms, and settings are as follows
0 = t
1 = 2t
2 = 4t
3 = 8t
Raising this value increases the toner supply motor ON time. Set to a high value if
the user tends to make many copies having high proportions of solid black image
areas (! 6.9.6).
2926* Standard Vt
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.
2929* Vref Limits
Adjust the upper or lower Vref limit.
2929 1 Upper
2929 2 Lower
2994* ID Sensor Detection Temperature
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.
SM
4 = 12t
5 = 16t
6 = on continuously
7 = 0 s
[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]
5-9
SERVICE PROGRAM MODE
B121/B122/B123