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6 Each time the formatter receives a synchronized BD signal
from the DC controller, the formatter sends a VIDEO data
stream (
VDO) to the DC controller.
7 After the DC controller receives the VDO data, the DC
controller translates it into a VIDEO OUT signal (
VDOUT)
that switches the laser diode ON and OFF.
8 The laser beam, created by the laser diode, reflects off the
scanner mirror onto the photosensitive drum to form a latent
electrostatic image, writing a single line of print (dot) data.
9 After the last VDO line of dot data is sent from the formatter,
the DC controller checks for another
PRNT signal from the
formatter.
10
If another PRNT signal is detected, the Print period continues
with another page.
11 If the DC controller fails to receive a PRNT signal before the
end of the page passes over the Input/Registration Sensor
(PS1), the DC controller initiates the Last Rotation period.
If the printer fails to perform correctly, the DC controller sends
an appropriate status to the formatter PCA, and an error is
displayed on the printer’s control panel.
Timing Diagrams
The following timing diagram describes the operation of the
printers. The “MP Tray Timing Diagram” was developed by
running two consecutive prints on A4 paper.
5-34 Functional Overview