Laser Exposure System
Functional Configuration
Overview
The laser exposure system forms a static latent image on the Photosensitive Drum by laser exposure.
Description
The Laser Scanner Unit consists of the Laser Unit and the Scanner Motor Unit, and is controlled by the signal input from the DC
Controller.
Also, the Laser Scanner Unit irradiates the Photosensitive Drum with a laser beam to form a latent image on it according to the
video signal sent from the Main Controller.
DC Controller
Engine Controller PCB
Main Controller PCB
SCANNER MOTOR SPEED
CONTROL signal
LASER CONTROL
signal
VIDEO signal
BD INPUT signal
Scanner Mirror
BD Sensor
Scanner Motor Unit
Photosensitive Drum
Laser Unit
Failure Detection
Overview
The DC Controller detects the following failures in the Laser Scanner Unit.
• Scanner area failure
• Scanner Motor failure
Description
Scanner area failure detection
If an error in any of the Scanner Motor, Laser Driver, or BD detection in the scanner area is detected, an error code is notified.
Scanner Motor failure detection
• When the BD cycle is out of the specified range, an error code is notified.
2. Technology
39
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