Canon LBP-2000, Service Manual

Page: 43 / 222

CHAPTER 2
2 - 4
• During Printing
Table 2-1-2
Purpose Remarks
STBY
(standby)
print
From when the primary DC bias
goes off to when the main motor
stops. To form an image on the
photosensitive drum according
to the /VDO signal and VDO
signal from the video controller
and then to transfer the toner
image to paper.
LSTR
(last rotation)
From when the primary DC bias
goes off to when the main motor
stops. To deliver the last sheet of paper.
In addition, to rid the drum surface
of potential and to clean the
transfer charging roller.
INTR
(initial rotation)
From when the /PRNT signal arrives
from the video controller to when the
DC controller generates the /TOP
signal.
From when the warm-up rotation
interval ends to when the /PRNT
signal arrives from the video
controller. Or, from when LSTR ends
to when the /PRNT signal arrives
from the video controller or when the
power switch is turned off.
Interval
To control the fixing roller to
standby state, thereby keeping
the Printer ready for printing.
To make the sensitivity of the
photosensitive drum stable by
way of preparing for printing.
The Printer enters the
initial rotation interval as
soon as the /PRNT
signal arrives from the
video controller.