Canon Color imageRUNNER LBP5280, Service Manual, Page: 21 / 284

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Technical Reference > Basic Configuration > Basic Sequence of Operation
Technical Reference > Basic Configuration > Basic Sequence of Operation
Basic Configuration
Outline
The machine may be broadly divided into the following 6 functional blocks: engine control
system, laser exposure system, image formation system, pickup/transport/delivery system,
fixing system, and externals/auxiliary control system.
To external device
Engine control
system
Laser exposure system
Pickup/transport/delivery system
Image formation system
Fixing system
Externals and control system
F-2-1
Basic Sequence of Operation
The operational sequence of the printer is controlled by the DC controller in the engine control
system.
Table describes periods, durations and operations for each period of a print operation from
the printer is turned on until the motors stop rotating.
Period Duration Operation
WAIT From the time the power switch is
turned on, the door is closed or the
Sleep mode is released until the printer
gets ready for a print operation
Brings the printer to printable condition
The printer performs the following during
this period:
• Detects the pressure roller pressurized
status
• Detects the presence of each cartridge
and unit
• Determines the homeposition of the
development unit
• Cleans the ITB
• Completes any required calibration, such
as color
STBY
(standby)
From the end of WAIT or LSTR period
until either the print command is
received from the main controller or the
power switch is turned off
Maintains the printer in printable condition
The printer performs the following during
this period:
• Enters Sleep mode when the main
controller sends a sleep command
• Completes any required calibration,
such as color misregistration control and
image stabilization control, when the
main controller sends a command
INTR
(Initial rotation
period)
From the time the print command is
received from the main controller during
STBY period until the temperature
of the fixing assembly reaches the
targeted temperature
Starts up each high-voltage bias, laser
scanner unit and fixing assembly for
preparing a print operation
PRINT From the end of INTR period until
the last media completes the fixing
operation
Forms the image on the photosensitive
drum based on the video signals from the
main controller, transfers and fuses the
toner image to the print media The printer
performs color misregistration control and
image stabilization control at a specified
print interval after the printer is turned on