Canon CLBP-460PS, Руководство по обслуживанию

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2. Electrostatic latent image formation block
a. Outline
The electrostatic latent image formation block consists of a drum cartridge (photosensitive drum,
a primary charging roller, a waste toner container, a drum cartridge memory, a toner feed plate
and a stirrer).
The photosensitive drum, toner feed plate and stirrer are driven by the drum motor (M4). The
primary charging roller follows the photosensitive drum rotation.
The waste toner in the drum cartridge is detected by the waste toner full sensor (PS13).
Referring to the time of drum cartridge consumption stored in the drum cartridge memory, the
DC controller detects the life of the photosensitive drum.
The presence of the drum cartridge is detected by the DRUM CARTRIDGE DETECTION sig-
nal (DRMSET). If the DRMSET signal is “H” for 0.3 seconds or more during WAIT period after
power-ON or the drum cartridge drawer open/close, the DC controller determines that the drum
cartridge is installed in the printer. If the signal does not stay “H” for 0.3 seconds or more, the
DC controller notifies the video controller of the “no drum cartridge.”
Figure 2-4-3
2 - 47
CHAPTER 2
DC controller PCB
DRUM
MOT
OR
DRIVE
signals
W
ASTE
T
ONER
DETECTION
signal
(WTNSNS)
W
ASTE
T
ONER
FULL
DETECTION
LED
EMISSION
signal
(WTLED)
PS13
M4: Drum motor
PS13: Waste toner full sensor
Waste toner container
Photosensitive
drum
Drum cartridge memory
Primary charging
roller
Developing PCB
M4
Stirrer
Toner feed plate
DRUM
CAR
TRIDGE
MEMOR
Y
D
A
T
A
OUTPUT
signal
(DRMDO)
DRUM
CAR
TRIDGE
MEMOR
Y
D
A
T
A
INPUT
signal
(DRMDI)
DRUM
CAR
TRIDGE
MEMOR
Y
SERIAL
CLOCK
signal
(DRMCLK)
DRUM
CAR
TRIDGE
MEMOR
Y
SELECT
signal
(DRMCS)
5V
for
drum
cartridge
memory
(DRMC5V)
DRUM
CAR
TRIDGE
DETECTION
signal
(DRMSET)