Sequence of operation
Table 5-1 Sequence of operation
Period Duration Purpose Remarks
WAIT From the time the power is
turned on, the door is closed,
or the Sleep mode is released
until the printer gets ready for
a print job
Brings the printer to printing
readiness
Detects the pressurization
status of the pressure roller,
presence of the cartridges,
and home position of the
development unit; cleans the
ITB; and completes any
required calibration (color
registration control and image
stability)
STBY (Standby period) From the end of the WAIT or
LSTR period until either the
print command is received
from the formatter or the
power is turned off
Maintains the printer in
readiness for a print
command
The printer enters Sleep
mode when the formatter
sends a sleep command and
performs color registration
and image stability control
when the formatter sends
those commands
INTR (Initial rotation period) From the time the print
command is received from the
formatter during STBY until
the temperature of the fuser
reaches the target
temperature
Prepares the photosensitive
drum for printing
Starts up each high-voltage
bias, laser/scanner unit, and
fuser unit
PRINT From the end of INTR period
until the last media completes
the fusing operation
Forms the images on the
photosensitive drum and
transfers the toner image to
the print media
Performs color
misregistration control and
image stabilization at a
specified print interval
LSTR (Last rotation period) From the end of the PRINT
period until the delivery motor
stops rotating
Moves the printed sheet out of
the printer and stops
operation of the laser/scanner
unit and high-voltage biases
The printer enters the INTR
period when the formatter
sends another print
command.
60 Chapter 5 Theory of operation ENWW
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