Controlling Separation Charging; Outline - Canon iR5000 Service Manual

CHAPTER 4 IMAGE FORMATION SYSTEM

3.6 Controlling Separation Charging

3.6.1 Outline

The system used to control separation charging serves the following functions:
1. Controlling the DC bias to a specific level of current.
2. Controlling the AC bias to a specific level of voltage.
3. Corrects the output to suit the environment and the density of the original used (sur-
face potential of the drum; fuzzy control).
The system used to control separation charging is constructed as follows:
J102A
1
2
3
4
5
PT/SP-LEAK-DETECT [1]
6
7
8
9
10
11
12
PT/SP-REMOTE [2]
13
SP-CNT [3]
14
15
16
4-32 P
J4502
16
15
14
13
12
11
10
9
8
7
6
5
4
1
3
2
2
3
1
F04-306-01
COPYRIGHT © 2000 CANON INC.
The level of current of the DC bias
varies as follows in keeping with
the potential of SP-CNT.
100µA
-500µA
Separation
charging wire
T4501
J4505
AC+DC
The level of voltage of the
AC bias varies as follows
in keeping with the potential
of SP-CNT.
12KV
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
3V
11V 12V
SP-CNT
PP
8KV
PP
3V
11V 12V
HV-CNT