CHAPTER 4 IMAGE FORMATION SYSTEM
COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-27
II. DEVELOPING ASSEMBLY/CLEANING ASSEMBLY
A.
Outline
The machine’s developing assembly may be locked into or out of position by means of a lock-
ing lever.
The developing cylinder inside the developing assembly and the waste toner feeding blade of
the drum unit are rotated by the drive of the main motor (M1).
The level of toner inside the developing assembly is monitored by the toner level antenna;
when the level drops below a specific value, the Replace Toner Cartridge message will start to flash
on the control panel.
The waste toner collected by the cleaning blade is held inside the drum unit, and is sent to the
rear of the drum unit by the toner feed blade.
The primary charging roller is cleaned by the cleaning pad operated by the cleaning solenoid (SL6).
Figure 4-201
DC controller PCB
Composite power supply PCB
M1
Toner level
detection PCB
Waste toner detection signal
Main motor
drive signal
Main motor
drive signal
Toner level
signal
Toner
level
signal
Cleaning solenoid drive signal
Waste toner
sensor
Drum unit
Developing
assembly
Toner antenna
Waste toner feeding blade
Cleaning blade
Cleaning
solenoid
Cleaning
pad
SL
6
Coupling
gear
(TNMONI)
(TNMONI)
(MMD)
(TNFULL)
(MMD)
PS5
(PCSLD*)
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