Sequence Of Operations (Toner Supply) - Canon Image Reader-A1 iR5000i Service Manual

CHAPTER 4 IMAGE FORMATION SYSTEM

4.4.1 Sequence of Operations (toner supply)

The toner inside the developing assembly is monitored by the developing assembly toner
sensor (TS1); when it drops below a specific level, the developing assembly toner level sig-
nal goes '0' and is sent to the DC controller PCB.
When the DC controller PCB detects the developing assembly toner level signal for 0.3
sec or more, the hopper motor drive signal will be issued so that the hopper will start to sup-
ply toner.
The supply of toner stops when the toner inside the developing assembly reaches a spe-
cific level and, as a result, the developing assembly toner level signal '1' is detected for 0.7
sec or more.
The level of toner inside the hopper is monitored by the hopper toner sensor while toner
is supplied by the hopper motor or toner is being stirred.
When the toner inside the hopper drops below a specific level, the hopper toner level de-
tection signal goes '0'. When the DC controller PCB detects the signal for 1.9 sec or more,
the machine will indicate the Add Toner message on its control panel.
The following shows the sequence of operations used by the hopper to supply the devel-
oping assembly with toner.
Developing
assembly toner
sensor (TS1)
Hopper supply motor
(M10)
Hopper
toner sensor
(TS2)
E020 (toner supply error)
It is indicated when the toner sensor (TS1) inside the developing assembly
detects the absence of toner for 120 sec or more.
4-42 P
Toner supply sequence start
Toner supply
2 sec
Supply
F04-404-02
COPYRIGHT © 2001 CANON INC.
In 120sec or more, '020' indicated
1 sec
Supply Supply
In1.9sec or more, 'Add' Toner indicated
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001
STBY