Configuration Function; Basic Sequence - Canon MF8580Cdw Service Manual

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Technical Overview > Basic Configuration > Basic Sequence > Basic Operational Sequence
Basic Configuration

Configuration function

This device is roughly composed of the 6 functional blocks as shown in the figure below
• Document exposure/delivery system
• Controller system
• Laser exposure system
• Image formation system
• Fixing system
• Pickup / Feed System
ADF
PC
CIS Unit
Delivery
Assembly
Main
Controller
Fixing System
Fixing
DC
Image
Assembly
Controller
Formation
System
Secondary
Transfer
Controller System
Laser beam
Paper flow
Pickup/feed System
Signal flow
2 Technical Overview > Basic Configuration > Basic Sequence > Basic Operational Sequence
Document Exposure/
Feeding System
Laser Exposure System
Laser Scanner
Drum Drum Drum Drum
ITB Unit
Pickup Manual Feed
Unit Pickup Unit
Cassette

Basic Sequence

■ Basic Operational Sequence
The CPU on the DC controller PCB controls the operational sequence. The table below
shows the operation and the purposes in each status from start-up of the device and to last
rotation after print job completion.
Status
WAIT Interval from power-ON or
(Wait) reactivation from sleep mode
upon shutting the door(s)
to entering the print-ready
status
STBY Interval from the wait time or
(STBY) the last rotation to issuance
of a print command from the
main controller or power-
OFF.
INTR Interval from issuance of
(IINTR) a print command from the
main controller during the
stand-by status to warming
up the fixing assembly to the
target temperature.
PRINT Interval from the initial
(Print) rotation to completion of last
page fixation.
LSTR Interval from print job
(Last completion to motor
rotation) deactivation.
F-2-1
Operation
Activate the printer to be ready for printing. During WAIT
time, the following operations are done: pressure is
applied to the pressure roller of the fixing assembly; check
cartridges and units being in place; move the developing
unit to the home position; and, clean the ITB. When
needed, color displacement is corrected and the image is
stabilized.
Maintain the print-ready status. The printer enters the sleep
mode upon receiving a "sleep" command from the main
controller during the stand-by status. The printer executes
color displacement correction or image stabilization
upon receiving corresponding commands from the main
controller.
To make the printer ready for print jobs, activate high-
voltage bias PCBs, the laser scanner unit and the fixing
assembly.
Based on the video signals input from the main controller,
form the static latent image on the photosensitive drum to
transfer and fix the toner image on paper. When a certain
pages are printed after power-ON, the device undergoes
color displacement correction and/or image stabilization.
The last page of the print job is completely delivered. In this
status, the laser scanner unit and high-voltage bias PCBs
are inactive. The printer starts the initial rotation upon
receiving a print command from the main controller during
this status.
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T-2-1
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