Canon LBP3300 Series, Руководство по обслуживанию

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Chapter 2
2-1
2.1 Functional Configuration
2.1.1 Outline
0011-2515
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 Operation Sequence
0011-2425
The operational sequences are controlled by the microprocessor on the engine controller PCB.
The table below describes the purposes of each period, from the power switch is turned ON until the print operation is completed, and the main motor stops. See
the appendix for detailed timing chart.
T-2-1
2.2.2 Power-on sequence
0011-2428
The sequence from when the power switch is turned ON until it gets the STBY status is described in the following.
1) Power ON
2) CPU initialization
3) Video interface communication start
4) Residual paper in the printer check
Check each sensor in the printer for any residual paper
5) Main motor initial drive
6) Fixing heater initial drive
Drive the fixing heater to reach the targeted temperature of 100 deg C
7) Scanner motor initial drive
8) High-voltage control
Detect the presence of cartridge and clean the transfer charging roller after the primary charging AC bias is turned ON
9) Failure/Abnormality check
Detect the scanner failure, the fixing unit failure, and the door open during this period
10) Memory tag communication
Period Purpose Remarks
WAIT
(WAIT period) From the power switch is turned ON until the
main motor initial drive is completed. To clear the potential of drum surface and
to clean the transfer charging roller. Detect the presence of cartridge.
STBY
(STANDBY) From the end of the WAIT period or the
LSTR period until the pick-up command is
input from the video controller. Or from the
end of the LSTR period until the power
switch is turned OFF. To keep the printer ready to print.
INTR
(INITIAL ROTATION
period) From the print command is input from the
video controller until the pick-up solenoid is
turned ON. To stabilize the photosensitive drum
sensitivity for preparation of printing.
PRINT
(Print) From the end of the INTR period until the
primary high-voltage is turned OFF. To form the image on the photosensitive
drum according to the VIDEO signals (/
VD01, VD01, /VD02, VD02) input from
the video controller and transfer the toner
image onto the print paper.
LSTR
(LAST ROTATION period) From the primary high-voltage is turned OFF
until the main motor stops. To deliver the last print paper completely
out and clean the transfer charging roller. When the pick-up command is input from
the video controller, the INTR period
starts right after the LSTR period is
completed.
To external device
Engine control
system
Laser exposure system
Pickup/transport/delivery system
Image formation system
Fixing system
Externals and control system