Controlling The Developing Bias; Outline - Canon iR1600 Service Manual

CHAPTER 5 IMAGE FORMATION SYSTEM

3 Controlling the Developing Bias

3.1 Outline

A DC bias and an AC bias are applied to the developing cylinder, and the developing
bias control system has the following functions:
[1] turning on and off the bias.
[2] controlling the developing DC bias to a constant voltage level.
[3] controlling the developing AC bias to a constant voltage level.
[4] controlling the voltage level of the developing bias.
The system used to control the developing bias control mechanism is constructed as fol-
lows:
DC controller PCB
DCPWM*
ASIC
DVDCUP*
DVDCFOT*
DVACFOT*
DVACON*
CPU
5-6
To primary bias circuit
Developing bias circuit
Comparison
voltage detection circuit
circuit
Comparison
circuit
voltage detection circuit
F05-301-01
COPYRIGHT© 22002 CANON INC.
Developing DC bias
DC generation circuit
Superimposition
AC generation circuit
Developing AC bias
2000 CANON iR1600/iR2000 REV.1 JAN. 2002
Dv TB403/TB404
To developing
cylinder