User guide

98 Chapter 4 - Operational overview EN
Basic sequence of operation (formatter-to-
printer)
The operation sequence of the printer is controlled by the
microprocessor (CPU) on the ECU. The following events take place
during normal printer operation:
Table 14. Basic sequence of operation
Period Purpose Remarks
WAIT
After the product is turned on
until the end of the initial
rotation of the main motor.
To clear the drum surface of
potential and to clean the
primary charging roller.
Detects whether or not the
cartridge is installed.
STBY (Standby)
From the end of the WAIT
period or the LSTR period
until the pickup command is
sent from the formatter. Or,
from the end of the LSTR
period until the product is
turned off.
To pause until the product is
ready to print.
INTR (Initial Rotation Period)
After the pickup command
has been sent from the
formatter until the media
reaches the top-of-page
sensor (PS402).
To stabilize the
photosensitive drum
sensitivity in preparation for
printing. Also to clean the
primary charging roller.
PRINT (Print)
From the end of the initial
rotation until the primary
voltage goes OFF.
To form images on the
photosensitive drum based
on the VIDEO signals (/VDO,
VDO) sent from the formatter
and to transfer the toner
image onto the media.
LSTR (Last Rotation Period)
After the primary voltage
goes OFF until the main
motor stops rotating.
To deliver the last page. Also
to clean the primary charging
roller.
When the pickup command is
sent from the video controller,
the printer enters the INTR
period immediately after the
end of the LSTR period.