Controlling The Laser Shutter; Laser Shutter Control - Canon imagerunner C5180 Service Manual

Chapter 8

8.3.4 Controlling the Laser Shutter

8.3.4.1 Laser shutter control

When any of the following covers is opened (possibly causing leakage of laser light), the laser is turned off.
- front cover
- manual feeder unit
- fixing/feeding unit
When these covers (unit) are opened, the operating voltage (5 V) applied to the laser driver is turned off and, in
addition, the laser control signal/image signal is also turned off.
Front cover switch
Manual feeder unit
open/close switch
Fixing/feeding unit
open/closed switch
Front cover open/closed sensor
PS23
Manual feeder unit
open/closed sensor
PS28
Fixing/feeding unit
open/closed sensor
PS5
8-14
DC power
supply unit
PWMIC
DC controller PCB 1(IMG)
F-8-12
Control IC
(IMG)