CHAPTER 4 IMAGE FORMATION SYSTEM
COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-1
I.
PROCESSES
A.
Outline
The basic structure of the image formation system is as shown below.
• Scanning lamp control system
• Primary/transfer corona current and grid bias voltage control system
• Developing bias control system
• Document density measurement system
• Developing assembly/drum cleaning system
• Blanking system
Figure 4-101
Scanning lamp
AE sensor
Lamp
driver unit
Lens
High-voltage
transformer
(HVT)
DC controller
PCB
GRID ON signal (GRDON)
Blank exposure shutter
Pre-exposure lamp
Photosensitive
drum
HVTON command (HVTON)
(ACBON)
(DCBC)
DC BIAS control command
GRID BIAS control signal (GRBC)
AC BIAS ON command
(PEXP)
PRE-EXPOSURE LAMP DRIVE command
(LA
ON)
LAMP ON command
Static charge eliminator bias
(LIC)
AE
LIGHT INTENSITY
CONTR
OL command
T
ransf
er corona assemb
ly
high v
oltage
De
v
eloping bias
Содержание NP6317
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