Pcb - Canon imageCLASS D600s Service Manual

Power switch ON
or
Reader unit in initial position
(at power-on)
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 From when WAIT
(standby) ends to when a print
command is received
by the DC controller
PCB through the
video I/F.
INTR From when a print
(initial command is received
rotation) until the leading edge
sensor detects the
leading edge of paper.
PRINT From when the lead-
(print) ing edge sensor de-
tects the leading edge
of paper to 1.5 sec
after it detects the
trailing edge of paper.
LSTR From when printing
(last ends until the main
rotation) motor stops.
COPYRIGHT © 2001 CANON INC.
Chapter4.p65
End of printing
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 process PCB sends
VD0* signal and VD0 signal,
thereby forming a latent im-
age on the photosensitive
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
CANON imageCLASS D600s/PC1060s/PC1200s/iR1200s REV. 0 SEPT. 2001
3
CHAPTER 4 OPERATION
If a print command is received
during last rotation
Print
If continuous printing is selected
Remarks
A check is made on the presence/
absence of a cartridge and for pa-
per remaining inside the machine.
The machine also shifts to WAIT
state if the reader unit is returned
while power is supplied.
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 rota-
tion 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 immedi-
ately shifts to initial rotation.
8/26/01, 3:44 PM
Last rotation
4-3