Basic Sequence; Basic Sequence Of Operation - Canon Color imageCLASS MF9170c Service Manual

2.2 Basic Sequence

2.2.1 Basic Sequence of Operation

imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
The operational sequence of a printer is controlled by the microcomputer (CPU) on the DC controller.
The purposes of each period, from power-ON until the inverter motor stops after the completion of printing, are listed below.
Operation
WAIT From either power switch is turned ON or
(Wait) front cover is closed until each drum phase
adjustment is completed.
STBY From end of WAIT or LSTR period until
(Stand-by) either the print command is input from the
main controller or power switch is turned
OFF.
INTR From the print command is input by the
(Initial rotation) main controller until paper is picked up.
PRINT From /TOP signal is sent to the main
(Print) controller after INTR period until the
fixing delivery sensor detects trailing edge
of paper.
LSTR From the end of PRINT period until the
(Last rotation) inverter motor stops.
Interval
To clear drum surface potential, to adjust
each drum phase, and to clean the ETB.
To keep the machine ready to print.
To stabilize the photosensitive drum
sensitivity in preparation for printing.
To form image on the photosensitive drum
based on the video signals sent from the
main controller and to transfer the toner
image onto paper.
To deliver the last paper out of the
machine.
T-2-1
Description
The machine detects the toner level, cartridge presence,
new cartridge, and environmental status during the
period.
It also executes the calibration (color displacement
correction and image stability control) as required.
The machine goes into sleep mode when a sleep
command is sent from the main controller.
It executes the color displacement correction and the
image stability control when each command is sent.
The printer executes the image stabilization control in
every specified number of prints or specified time
elapsed after the power is turned ON.
The machine returns to the INTR period as soon as
another print command is sent from the main controller.
Chapter 2
Remarks
2-3
0019-5072