Toner Density Control; Overview - Ricoh Russian-C2a Service Manual

10 August, 2001

2.6.6 TONER DENSITY CONTROL

Overview

There are four modes for controlling toner supply as shown in the following tables.
The mode can be changed with by SP2-921. The factory setting is sensor control 1
mode.
Basically, toner density 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 Clutch On Time
Calculation
TD Sensor Output
(Vt)
Vt Reference
Voltage (Vref)
Vt Reference
Voltage Update
Vref Update
ID Sensor Output
(Vsp/Vsg)
TD Sensor Initial
Setting (Vts)
2-37
DEVELOPMENT
New Vref
B027D517.WMF