Table 5-1. Basic operation sequence
Period Purpose Remark
WAIT (wait period) From the time the
power switch is turned
on until the ETB
cleaning is completed.
To clear a potential on
the drum surface and
to clean the ETB.
During this period, the
printer checks the
toner level and detects
whether the cartridges
are present. The
printer also executes
the pulse width
modulation
adjustment, color
registration
adjustment, and image
density calibration
control as required.
STBY (standby period) From the end of the
WAIT or LSTR period
or last rotation until the
formatter inputs a print
command or until the
power is turned off.
To keep the printer
ready to print.
When the formatter
sends a sleep
command, the printer
enters PowerSave
mode.
INTR (initial rotations
period)
From immediately
after the formatter
inputs a print
command until the /
TOP signal is sent to
the formatter.
To stabilize the
photosensitive drum’s
sensitivity in
preparation for a print
operation.
PRINT (print period) From the end of the
INTR period until the
leading edge detection
sensor detects paper
and then turns off the
transfer positive bias.
To form an image on
the photosensitive
drum according to the
video signal input from
the formatter and to
transfer the toner
image to the paper.
After the power is
turned on, the
cartridge is cleaned
every 35 pages and
the ETB is cleaned
every 100 pages.
LSTR (last rotations
period)
From the end of the
PRINT period until the
ETB motor stops.
To deliver the paper
out of the printer and
to clean the ETB.
The last rotations
period lasts until the
instant the formatter
sends a print
command. Then the
initial rotations period
starts again.
130 Chapter 5 Theory of operation ENWW
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