Canon iR1200 Series, Service Manual

Page: 114 / 494

Chapter 3
3-10
STBY
(standby)
After the end of WAIT,
unit the Start key is
pressed.
The machine is ready
for a print command.
If a shift is from last rotation of
printing on LTR or larger, the
fixing heater is subjected to rest
heating temperature control for
5 sec.
INTR
(initial
rotation)
After a press on the
Start key, until the
leading edge is
detected by the paper
leading edge sensor.
The machine starts up
process conditions and
picks up paper for
printing.
The fixing heater is subjected
to temperature control (start-up
temperature control, paper
passage temperature control);
scanner rotation speed
adjustment and ATVC control
are executed.
PRINT
(print)
From when the paper
leading edge sensor
detects the leading
edge of paper to 0.5 sec
after it detects the
trailing edge of paper.
The DC controller PCB
generates the BD0*
signal, and the image
processor PCB sends
VD0* signal and VD0
signal, thereby forming
a latent image on the
photosensitive drum
and turning it into a
toner image.
LSTR
(last
rotation)
From when printing
ends until the main
motor stops.
The drum surface is
made free of potential
and the transfer
charging roller is
cleaned.
After last rotation, the machine
shifts to standby to wait for a
print command, in response to
which it immediately shifts to
initial rotation.
Period Definition Purpose Remarks