Sequence of operation
Table 5-1 Sequence of operation
Period Duration Operation
WAIT From the time the power is turned on, the
door is closed, or the Sleep mode is
released until the product gets ready for a
print operation.
This period brings the product to printable condition.
During this period the product performs the following actions.
●
Detects the pressure roller pressurized status
●
Detects the presence of each cartridge and unit
●
Determines the home position of the development unit
●
Cleans the ITB
●
Completes any required calibration, such as color
misregistration and image stabilization control
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.
This period maintains the product in printable condition.
During this period the product performs the following actions.
●
Enters sleep mode when the formatter sends a sleep
command
●
Completes any required calibration, such as color
misregistration and image stabilization control, when
the formatter sends those commands
INTR (Initial
rotation)
From the time the print command is
received from the formatter during the
STBY period until the temperature of the
fuser unit reaches the targeted
temperature.
The product starts each high-voltage bias, laser-scanner unit,
and fuser unit for in preparation for a print operation.
PRINT From the end of INTR period until the last
sheet of media completes the fusing
operation.
The product forms the image on the photosensitive drum
based on the video signals from the formatter, and then
transfers and fuses the toner image to the print media.
The product performs color misregistration control and image
stabilization control at a specified print interval after the
product is turned on.
LSTR (Last
rotation)
From the end of the PRINT period until the
motors stop rotating.
The product moves the last printed sheet out of the product,
and then it stops the laser-scanner unit operation and the
high-voltage biases.
The product enters the INTR period as soon as the LSTR
period is completed, if the formatter sends another print
command.
84 Chapter 5 Theory of operation ENWW
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