Canon MF8100 Series, Service Manual, Page: 31 / 296

Chapter 1
1-7
1.5.2 Power-on Sequence
0008-1693
The power-on sequence is the first operation executed by loads based on the firmware previously stored in the printer. It is indicated in the flowchart below.
The power-on sequence is executed from when the power is turned on until the printer enters the standby status.
F-1-9
PRINT
(Print) From the end of the INTR
period until the ITB home
position for the secondary
transfer is detected. To form an image on the
photosensitive drum based on
the VIDEO signal input from
the interface controller and
transfer a toner image to the
ITB.
LSTR
(Last
rotation) From the end of a print
operation until the main
motor stops its rotation. To transfer secondarily a
toner image on the ITB to a
paper and then delivers
outpaper with toner fixed on. Instant a print command is input
from the interface controller; the
initial rotation starts.
Fan on
CPU initialization
ASIC initialization
Video interface communication ready
Video interface communication start
Printer ID check
Power on
Scanner motor initial drive
drive
Image stabilization
calibration control
Maximum image density control (D-max)
Failure
check period
Motor initial drive
* Main motor
* Toner cartridge motor
* Developing rotary motor
* Fixing motor
* Engaging motor
Standby
Residual
paper/door open
check period
Halftone calibration detection control (D-half)
EP-87 toner cartridge
presence/life check
EP-87 drum cartridge
presence/life check
Memory tag (for toner cartridges, drum
cartridge) communication start
Scanner motor initial drive check