Laser Shutter Control - Canon imageRUNNER ADVANCE C5045 Series Service Manual

2

Laser shutter control

Purpose
This is to prevent the residue toner from sticking to the dust-prevention glass. Or to prevent
the laser light from emitting to the machine inside when the front cover / right cover is opened.
Execution timing
After power-ON
Execution time
Approx. 3s (at power-ON), approx. 1s (when scanner motor is started or cover is opened)
Control detail
While the Laser Scanner Motor is operating, the Laser Shutter is opened. During other period,
the laser shutter is closed.
Also, the Front Cover Sensor (PS18) or the Right Cover Sensor (PS20) works together and
it stops the output signal of laser driver. At the same time, if the Front Cover or Right Cover is
opened, the Shutter is closed and the laser light path is forcibly blocked.
Those operations are controlled by the DC Controller.
2
Bk Laser Shutter
Bk Shutter Lever
Color
Shutter Lever
Bk Shutter Cam
Drive Shaft
Color Shutter Cam
Laser Shutter Sensor (PS29)
Sensor Lever
DC Controller (UN1)
2-37
Color Laser Shutter
Laser Shutter Motor (M28)
Front Cover Sensor (PS26)
Right Cover Sensor (PS26)
F-2-61 F-2-61
2-37