Various Controls - Canon imagePRESS 1135 Series Service Manual

2
Technology > Laser Control System > Various Controls > Laser ON/OFF Control

Various Controls

■ Overview
Items
Laser ON/OFF Control ON/OFF laser beam reacting to the combination of laser
control signal.
Main scanning synchronous control This is to align the write start position in main scanning
direction.
Sub scanning synchronous control This is to align the write start position in sub scanning
direction.
APC control This is to even out the laser light per 1 line.
Laser scanner motor control This is to rotate the scanner mirror by the specified speed.
Laser shutter control Enable laser to emit in machine.
DC controller
Laser ON/OFF control
Main scanning
synchronous control
Sub scanning
synchronous control
Main
controller
APC control
Laser scanner motor control
Laser shutter control
2 Technology > Laser Control System > Various Controls > Laser ON/OFF Control
Operation description
T-2-18
Laser
Scanner unit
Laser driver PCB
Scanner
motor unit
F-2-25
■ Laser ON/OFF Control
Purpose ON/OFF laser beam reacting to the combinations of Laser control signal.
Execution timing After power ON
Operation DC Controller switches 4 modes (Forcible OFF Mode, APC Mode, Print
Mode, Standby Mode) by laser control signal.
Laser control signal
Laser
DC controller
driver
Video signal
mode Laser status
Forcible OFF mode
OFF Clear the light intensity setting decided by APC.
APC mode
ON Laser intensity adjustment
Print mode
ON/OFF Emit the laser according to the video signal.
Standby mode
OFF Host machine is in standby mode.
Print Imaging ready
command timing
PSTBY PINTR
1line(APC)
LaserA
LaserB
LaserC
LaserD
Mode
Standby
APC mode
name mode
Scanner mirror
Laser beam
Remarks
LSTR
PRINT
2line(APC)
3line(APC)
4line(APC)
Forcible
APC mode / Print mode
OFF mode
2-25
T-2-19
F-2-26
PSTBY
Standby
mode
F-2-27
2-25