O P E R A T I O N S A N D T I M I N G
G. Developing Assembly and
Drum Cleaning Unit
1. Outline
The blade and developing cylinder inside the
drum cleaning
are rotated by the drive from the
main motor.
The
of toner inside the black developing
assembly monitored by the toner sensor
and, whenthefevelfalls belowaspecifiedvalue, the
ADD TONER indicatoron the control panel starts to
flash.
The CT
cannot be replenished with
the CT unit as a whole when runs
of
toner.
The toner
by the cleaning blade
stored inside the drum cleaning
Thedevelopingassemblyisbrought intocontact
with the photosensitive drum together with the
developing assembly rail by the developing
bly
2.
the Toner
A piezoelectric oscillator toner sensor
provided inside the black developing assembly to
monitor
of toner.
long
as a specific
of toner inside the assembly;
whenthetonerdecreases
goes ‘0’.
The DC controller reads the
for 5
aftercopy operation
if the
remains
‘O’continuously, recognizes ‘no toner 1’. When ‘no
toner 2’ recognized, the DC controller flashes the
The CT
not equipped with a toner
detection mechanism, or the cleaning
not
equipped with a
toner
detection
nism.
3. Torque Limiter
If a
load imposed
the photosensitive
drum while the drum rotating forsome
the
torque
off the drive from the main motor
to
the rotation of the drum.
D r u m c l e a n i n g
r
a
i
l
Figure 3-35
3 - 3 6
CANON INC.
C A N O N
M A Y
I N J A P A H
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