CHAPTER 5 IMAGE FORMATION SYSTEM
COPYRIGHT© 2002 CANON INC.
2000
CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002
5 - 4
2 1 Controlling the Primary Charging Roller Bias
2.1 Outline
The machine uses a charging roller for primary charging (direct charging method), and
it applies an AC bias to stabilize the charging in addition to the DC bias.
The following items of control are used in relation to the primary charging control system:
[1] turning on and of the bias.
[2] performing constant voltage control for the DC bias.
[3] performing constant current control for the AC bias.
The primary charging control system is constructed as shown in the following diagram:
F05-201-01
TB401/TB402
Pr
PRACON*
PRACFOT*
DCPWM*
PRDCFOT*
To developing bias circuit
To primary
charging roller
DC controller PCB
Primary charging circuit
ASIC
CPU
Primary DC
bias voltage
detection circuit
Primary AC
bias voltage
detection circuit
DC generation
circuit
AC generation
circuit
Comparison
circuit
Comparison
circuit
Superimposition
Summary of Contents for iR1600 Series
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Page 665: ...COPYRIGHT 2002 CANON INC CANON FAX BOARD REV 0 MAR 2002 CHAPTER 1 INTRODUCTION...
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Page 671: ...COPYRIGHT 2002 CANON INC CANON FAX BOARD REV 0 MAR 2002 CHAPTER 2 BASIC OPERATION...
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Page 679: ...COPYRIGHT 2002 CANON INC CANON FAX BOARD REV 0 MAR 2002 CHAPTER 3 TROUBLESHOOTING...
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