Ricoh R-C4 Service Manual page 210

SERVICE PROGRAM MODE
2915* Polygon Motor Idling Time
Selects the polygon motor idling time.
[0 = None / 1 = 15 s / 2 = 25 s]
If the user sets an original, touches a key, or opens the platen cover/DF, the
polygon motor starts idling to make a faster first copy. However, with the default
(15 s), the motor stops if the user does nothing for 15 s, and stops 15 s after the
end of a job.
If set at "0", the polygon motor never turns off during stand-by. However, when the
machine goes into energy saver mode, the polygon motor turns off regardless of
this timer.
2921* Toner Supply Mode
Selects the toner supply mode.
[0 = Sensor 1 / 1 = Sensor 2 / 2 = Fixed 1 / 3 = Fixed 2, 4 = Sensor 3]
Normally, only use setting 0. Change to 3 temporarily if the TD sensor is defective.
Do not use settings 1, 2 and 4; these are for designer's use only.
2922* Toner Supply Time
Adjusts the toner supply motor on time for sensor supply mode.
This SP is effective only when SP2921 is "0" or "1".
[0.1 ~ 5.0 / 0.6 / 0.1 s/step]
Increasing this value increases the toner supply motor on time. So, use a high
value if the user tends to make lots of copies that have a high proportion of black.
2923* Toner Recovery Time
Adjusts the toner supply motor on time during recovery from toner near-end/end.
This SP is effective only when SP2921 is "0", "1", or "2".
[1 ~ 60 / 30 / 1 s/step]
Note that toner recovery is done in a 3-second cycle. So, the input value should be
a multiple of 3 (e.g. 3, 6 ,9). See "Toner Density Control" for more details.
2925* Toner Supply Ratio
Adjusts the toner supply rate for fixed toner supply mode.
This SP is effective only when SP2921 is "2" or "3".
Increasing this value increases the toner supply motor on time. So, use a high
value if the user tends to make lots of copies that have a high proportion of black.
See "Toner Density Control" for more details.
[0 ~ 7 / 0 / 1/step]
0: t
1: 2t
2: 4t
3: 8t
t: 200 ms
2926* Standard Vt DFU
Adjusts Vts (Vt for a new PCU). The TD sensor output is adjusted to this value
during the TD sensor initial setting process. This SP is effective only when SP2921
is "0", "1", or "2".
[0.00 ~ 5.00 / 2.50 / 0.05 V/step]
4: 12t
5: 16t
6: On continuously
7: 0 s
5-22
21 July 2006