COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON iR5000i/iR6000i REV.0 JUNE 2001
CHAPTER 4 IMAGE FORMATION SYSTEM
4-18 P
3. Controlling Charging
3.1 Controlling Pre-Exposure LED
3.1.1 Outline
The machine is equipped with a pre-exposure LED array to prevent adhesion of excess
toner to the photosensitive drum because of residual charge, and its system of control serves
the following functions:
1. Turning On/Off the Pre-Exposure LED Array
F04-301-01
The system uses the following signals:
[1] pre-exposure LED control signal:
when ‘0’, LED turns on.
DC controller PCB
Pre-exposure lamp
J103A
24V
PEXP* [1]
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