Ricoh B245-62 Service Training page 73

Toner supply motor on time in sensor control mode
For sensor control modes 1 and 2, the toner supply motor
on time is decided by the following factors.
» Vt
» Vref or Vts
» TD sensor sensitivity (coefficient: S, value is 0.4)
There are seven levels for toner supply motor on time as
shown in the table below.
Level
1
2
3
4
5
6
7
Slide 73
The value of "t" can be changed using SP 2922. (default: 0.4 second)
The value of "T" can be changed using SP 2923. (default: 30 seconds)
T (30) means that toner is supplied intermittently in a 1/3 duty cycle (1 s on, 2 s
off) for 30 seconds.
Toner Density Control 6
Decision
(Vts or Vref) < Vt ≤ (Vts or Vref) + S/16
(Vts or Vref) < Vt ≤ (Vts or Vref) + S/8
(Vts or Vref) < Vt ≤ (Vts or Vref) + S/4
(Vts or Vref) < Vt ≤ (Vts or Vref) + S/2
(Vts or Vref) < Vt ≤ (Vts or Vref) + 4S/5
Vt ≥ (Vts or Vref) + 4S/16 (near-end)
Vt ≥ (Vts or Vref) + S (toner end)
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Motor On Time (seconds)
t (0.4)
t x 2 (0.8)
t x 4 (1.6)
t x 8 (3.2)
t x 16 (6.4)
T (30); see note 3
T (30); see note 3
B245-62 / PD-C4