Canon Color imageCLASS MF8280Cw, Service Manual

Page: 44 / 401

2
2
2-15
2-15
Technical Overview > Laser Control System > Controls > Failure detection
Technical Overview > Laser Control System > Controls > Failure detection
Laser Control System
Overview
The Laser Scanner system is to form a static latent image on the photosensitive drum based
on the video signal sent from the Main Controller.
The Laser Scanner Unit is composed of the laser driver, the Scanner Motor Unit and other
components, which are controlled based on signals input by the DC Controller.
The figure below shows the Laser Scanner Unit schematically.
BD Sensor
Laser Driver
Scanning Mirror
Scanning Motor
SCANNER MOTOR SPEED CONTROL signal VIDEO signal LASER CONTROL signal BD signal
Photosensitive Drum
(K)
Photosensitive Drum
(C)
Photosensitive Drum
(M)
Photosensitive Drum
(Y)
DC Controller
Main Controller
F-2-14
Controls
■ Failure detection
1. Scanner Motor failures
• The rotation does not reach the pre-defined value after a certain time elapsed from the
Scanner Motor actuated.
• The rotation failed to meet the tolerable range consecutively within a certain time during the
Scanner Motor in drive.
Error Code: E110-0000
2. BD failures
• When out-of-range BD cycle is detected during printing.