Various Controls; Controlling The Laser Activation Timing - Canon imageRUNNER 2530 Service Manual

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Technology > Laser Exposure System > Various Controls > Controlling the Laser Activation Timing

Various Controls

Controlling the Laser Activation Timing

Laser ON/OFF Control
Laser ON/OFF control is dependent on the combination of the laser control signal
(CNT1-0/1-1/1-2) from the image PCB.
Laser control signal
CNT1-2 CNT1-1 CNT1-0
0 1 0
0 1 1
0 0 1
0 1 1
1 1 1 Video signal entry arrowed Video signal entry arrowed
0 1 1
0 0 1
0 1 1
J8142
Main Controller PCB
2 Technology > Laser Exposure System > Various Controls > Controlling the Laser Activation Timing
Laser status
C Laser D Laser
ON (For APC control) OFF
OFF OFF
OFF ON (For APC control)
OFF OFF
OFF OFF
OFF ON (For APC control)
OFF OFF
Main Scanning Synchronous Control
The synchronous control in the main scanning direction is performed in the synch circuit
based on the BD synchsignal.
Using the BD signal generated based on the light from laser C, the DC controller PCB
generates the BD synchsignal for laser C and the BD synch signal for laser D.
The image data written to line memory is read out by the readout enable signal (RE_C,
RE_D) generated basedon the BD synch signal (BD_C, BD_D) for output to the laser driver
PCB.
[6]
T-2-19 T-2-19
J8143
[1]
[2]
[5]
F-2-49 F-2-49
Main Controller PCB
[1] Synchronous PCB
[2] Delay PCB
[3] Line memory
BD_C/D : BD synch signal
RE_C/D : readout enable signal
J8142
BD_C
RE_C
[3]
[4]
BD_D
RE_D
[3]
[4] VDO
[5] VDO signal process unit
[6] Laser driver PCB
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F-2-50 F-2-50
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