HP 1200 Service Manual - Page 63
Printer engine control system, Printer laser/scanner drive
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Printer engine control system Paper motion monitoring and control The ECU controls paper motion in the printer by continuously monitoring the various paper sensors and coordinating the timing with the other print processes. For a detailed explanation of paper movement and the interaction of the photosensors and solenoid with the paper movement process, see "Printer paper-feed system" on page 67. Motor The motor is controlled by the ECU. The motor provides all of the printer paper movement. Printer laser/scanner drive The ECU sends signals to the laser/scanner assembly to modulate the laser diode "on" and "off" and to drive the laser/scanner motor. Figure 16. Overview of laser/scanner operation EN Printer functions 61
EN
Printer functions
61
Printer engine control system
Paper motion monitoring and control
The ECU controls paper motion in the printer by continuously
monitoring the various paper sensors and coordinating the timing with
the other print processes.
For a detailed explanation of paper movement and the interaction of
the photosensors and solenoid with the paper movement process,
see “Printer paper-feed system” on page 67.
Motor
The motor is controlled by the ECU. The motor provides all of the
printer paper movement.
Printer laser/scanner drive
The ECU sends signals to the laser/scanner assembly to modulate
the laser diode “on” and “off” and to drive the laser/scanner motor.
Figure 16.
Overview of laser/scanner operation