Canon iR1200 Series Service Manual page 173

Power ON
or
when the power ON and, in
addition, the toner bottle fitted,
the reader unit and the toner
supply cover are put back.
or
Return from ESS mode
Wait
Period Definition
WAIT From when the power
(wait) is turned on until
when the application
of the primary charg-
ing AC bias is started
and stopped.
STBY After the end of
(standby) WAIT, unit the Start
key is pressed.
INTR After a press on the
(initial Start key, until the
rotation) leading edge is de-
tected by the paper
leading edge sensor.
PRINT From when the paper
(print) leading edge sensor
detects the leading
edge of paper to 0.5
sec after it detects the
trailing edge of paper.
LSTR From when printing
(last ends until the main
rotation) motor stops.
COPYRIGHT © 2002 CANON INC.
Standby
Initial rotation
F04-101-03
Purpose
The machine's mechanical
and electrical states are
checked.
The machine is ready for a
print command.
The machine starts up pro-
cess conditions and picks up
paper for printing.
The DC controller PCB gen-
erates the BD0* signal, and
the image processor PCB
sends VD0* signal and VD0
signal, thereby forming a la-
tent image on the photosensi-
tive drum and turning it into
a toner image.
The drum surface is made
free of potential and the
transfer charging roller is
cleaned.
T04-101-01
2000 2000 2000 2000 CANON iR1200/iR1300 Series REV. 0 AUG. 2002
End of printing
If a print command is received
during last rotation
Print
If continuous printing is selected
A check is made on the presence/absence of
a cartridge and for paper remaining inside
the machine. The machine also shifts the
WAIT state when the power ON and, in
addition, the toner bottle fitted, the reader
unit and the toner supply cover are put back,
or after returning from ESS mode.
If a shift is from last rotation of
printing on LTR or larger, the fix-
ing heater is subjected to rest heat-
ing temperature control for 5 sec.
The fixing heater is subjected to
temperature control (start-up tem-
perature control, paper passage
temperature control); scanner ro-
tation speed adjustment and
ATVC control are executed.
After last rotation, the machine shifts
to standby to wait for a print com-
mand, in response to which it imme-
diately shifts to initial rotation.
CHAPTER 4 OPERATION
Last rotation
Remarks
4-3