Ricoh B121 Service Manual page 192

SERVICE PROGRAM MODE
2908 Forced Toner Supply
2908 1 Forces the toner bottle to supply toner to the toner supply unit. Press "1" to start.
The machine continues to supply toner until the toner concentration in the
development unit reaches the standard level, or for up to 2 minutes (whichever
comes first).
2915* Polygon Mirror Motor Idling Time
2915 1 [0 = None / 1 = 15 s / 2 = 25 s]
Selects the polygon mirror motor idling time. To increase the speed of the first copy,
the mirror motor begins idling when the user sets an original, touches a key, or
opens the platen cover or DF. If this setting is left at the default (15 s), the motor will
stop if the user does nothing for 15s. If the setting is "0", the motor will not switch off
during standby. (But note that regardless of the setting, the motor will switch off
when the machine enters energy saver mode.)
2921* Toner Supply Mode
2921 1 [0 = Sensor 1 / 1 = Sensor 2 (DFU) / 2 = Fixed 1 (DFU) / 3 = Fixed 2]
Selects the toner supply mode. Under normal conditions this should be set to "0".
You can temporarily change this to "3" if the TD sensor is defective. Do not set to
"1" or "2", as these are for design use only (
2922* Toner Supply Time
2922 1 [0.1 ~ 5.0 / 0.4 / 0.1 s/step]
Adjusts the toner supply motor ON time for Sensor 1 and Sensor 2 toner supply
mode. Accordingly, this setting is effective only if SP2-921 is set to "0" or "1"
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 (
2923* Toner Recovery Time
2923 1 [3 ~ 60 / 30 / 1 s/step]
Adjusts the toner supply motor ON time used during toner recovery from Toner
Near End or Toner End. This setting is effective only if SP2-921 is set to "0" Since
toner recovery is carried out in 3-second cycles, the input value should be a
multiple of 3 (3, 6, 9...).
2925* Toner Supply Rate
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 (
B121 Series/B259 Series
6.9.6).
6.9.6
4 = 12t
5 = 16t
6 = on continuously
7 = 0 s
6.9.6).
6.9.6).
5-32 SM