Functional Configuration; Outline; Basic Sequence; Basic Sequence Of Operation - Canon LBP3010 Series Service Manual

2.1 Functional Configuration

2.1.1 Outline

LBP3100 / LBP3010B
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.

2.2 Basic Sequence

2.2.1 Basic Sequence of Operation

LBP3100 / LBP3010B
The engine controller controls the operation sequence.The following table provides an outline of machine operation occurring from when the power switch is turned
on to when printing ends and motors stop, indicating the purposes of intervals and engine operation. For details of various loads, see the timing chart.
WAIT
(Wait)
STBY
(Standby)
INTR
(initial
rotation)
PRINT
(print)
LSTR
(last rotation)

2.2.2 Power-On Sequence

LBP3100 / LBP3010B
The sequences from the power-ON to the STBY period are described below.
1) Power-ON
2) CPU initialization
3) Video interface communication start
4) Residual paper check
Detecting paper presence by each sensor signaling.
5) Initial drive for main motor
6) Initial drive for fixing heater
Engine control
system
external device
Interval
From power-ON until initial drive for
main motor is completed.
From the end of the WAIT period or
the LSTR period until the print
command is sent from the main
controller. Or, from the end of the
LSTR period until power switch is
turned OFF.
From the input of the print command
from the main controller until the pick-
up solenoid is turned ON.
From the end of the INTR period until
the top of page sensor detects the
trailing edge of paper.
From the end of PRINT period until
the Main motor stops.
Laser exposure system
Image formation system
Pickup/transport/delivery system
Fixing system
Externals and control system
F-2-1
T-2-1
Purpose
To clear potential from the drum
surface and to clean the transfer roller.
Also to bring the heater temperature
up to the targeted temperature.
To keep the printer ready to print.
To stabilize the photosensitive drum
sensitivity in preparation for printing.
Also to clean the transfer roller.
To form image on the photosensitive
drum based on the VIDEO (/VD0,
VD0) signals input from the main
controller, and to transfer the toner
image onto paper.
To deliver the last paper completely
out of the printer.
Remarks
Detect whether the Toner cartridge is
installed or not.
Return to the INTR period as soon as
another print command is sent from the
main controller.
Chapter 2
0019-4167
0019-4168
0019-5929
2-1