Controlling The Laser Scanner Motor; Controlling The Laser Shutter - Canon iR4570 Series Service Manual

Chapter 6
specific level at all times.

6.3.3 Controlling the Laser Scanner Motor

6.3.3.1 Controlling the Laser Scanner Motor

iR2270 / iR2870 / iR3570 / iR4570
The laser scanner motor is controlled with reference to the laser scanner motor revolution signal (FG signal).
The revolution of the laser scanner motor is controlled by means of the acceleration signal (ACC signal) and the
deceleration signal (DEC signal).

6.3.4 Controlling the Laser Shutter

6.3.4.1 Controlling the Laser Shutter

iR2270 / iR2870 / iR3570 / iR4570
When the right door is opened, the laser shutter link operating in conjunction with the cover causes the laser shutter
to move down, thus blocking the path of the laser light. If the machine identifies the front cover or the right door as
having been opened, it will turn off the laser scanner motor and the laser output.
6-10
J317
DC-CON
F-6-7
J316
0006-5978
0006-5979