Toner Density Control; Overview - Ricoh K-C1 Service Manual

DEVELOPMENT

6.9.6 TONER DENSITY CONTROL

Overview

There are four modes for controlling toner supply as shown in the following tables,
which can be changed with by SP2-921. The factory setting is sensor control 1
mode.
Basically, the toner concentration in the developer is controlled using the standard
TD sensor voltage (Vts), toner supply reference voltage (Vref), actual TD sensor
output voltage (Vt), and ID sensor output data (Vsp/Vsg).
Toner Supply Motor On Time
TD Sensor Output
(Vt)
Vt Reference
Voltage (Vref)
Vt Reference
Voltage Update
ID Sensor Output
(Vsp/Vsg)
TD Sensor Initial
Setting (Vts)
6-44
20 February, 2001
Calculation
New Vref
Vref Update
B039D315.WMF