Canon i-SENSYS LBP5300 Series, Service Manual

Page: 37 / 150

Chapter 2
2-1
2.1 Functional Configuration
2.1.1 Outline
0014-3182
/ i-SENSYS LBP5360 / i-SENSYS LBP5300
The machine may be broadly divided into the following 6 functional blocks: engine control system, laser exposure system, image formation system, pickup/trans-
port/delivery system, fixing system, and externals/auxiliary control system.
F-2-1
2.2 Basic Sequense
2.2.1 Basic Sequence of Operation
0014-3183
/ i-SENSYS LBP5360 / i-SENSYS LBP5300
The operational sequence of the printer is controlled by the microcomputer (CPU) on the DC controller in the engine control system. The purposes of each period,
from power-ON until each motor stops after the completion of printing, are listed below. See the appendix for detailed timing chart.
T-2-1
2.2.2 Power-On Sequence
0014-3185
/ i-SENSYS LBP5360 / i-SENSYS LBP5300
The power on sequence is for the purpose of the printer initialization and checking for possible malfunctions or paper jam.
The sequential diagram is shown below. This is described for printer status from the power-ON to STBY period.
Interval Description Remarks
WAIT
(Wait period) From either power switch is turned ON or door is closed
until each drum phase adjustment is completed. To clear drum surface potential, to adjust
each drum phase, and to clean the ETB. The printer detect the toner level,
cartridge presence, and
environmental status during the
period. Also execute the
calibration (color misregistration
control and image stability control)
as required.
STBY
(Standby period) From end of WAIT or LSTR period until either the print
command is input from the video controller or power
switch is turned OFF. To keep the printer ready to print. The printer goes into sleep mode
when a sleep command is sent from
the video controller. Also execute
the color misregistration control
and the image stability control
when each command is sent.
INTR
(Initial rotation period) From the print command is input from the video controller
until paper is picked up. To stabilize the photosensitive drum
sensitivity in preparation for printing.
PRINT
(Print period) From the /TOP signal is sent to the video controller after
INTR period until the fixing paper sensor detects trailing
edge of paper. To form image on the photosensitive
drum based on the VIDEO signals sent
from the video controller and to transfer
the toner image onto paper. The printer executes the image
stabilization control in every
specified number of prints or time
after the power is turned ON.
LSTR
(Last rotation period) From the end of PRINT period until the delivery motor
stops. To deliver the last paper out of the
printer. The ptinter returns to the INTR
period as soon as another print
command is sent from the video
controller.
To external device
Engine control
system
Laser exposure system
Pickup/transport/delivery system
Image formation system
Fixing system
Externals and control system