Canon IMAGERUNNER 2530, Руководство по обслуживанию

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Technology > Laser Exposure System > Various Controls > Controlling the Laser Activation Timing
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 Laser status
CNT1-2 CNT1-1 CNT1-0 C Laser D Laser
0 1 0 ON (For APC control) OFF
0 1 1 OFF OFF
0 0 1 OFF ON (For APC control)
0 1 1 OFF OFF
1 1 1 Video signal entry arrowed Video signal entry arrowed
0 1 1 OFF OFF
0 0 1 OFF ON (For APC control)
0 1 1 OFF OFF
J8142
CTRL0_2 CTRL0_1 CTRL0_0
Main Controller PCB
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T-2-19 T-2-19
F-2-49 F-2-49
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]
J8143 J8142
[3]
[3]
[2]
BD_C
RE_C
BD_D
[1]
RE_D
[5]
[4]
BD
signal
Main Controller PCB
[1] Synchronous PCB [4] VDO
[2] Delay PCB [5] VDO signal process unit
[3] Line memory [6] Laser driver PCB
BD_C/D : BD synch signal
RE_C/D : readout enable signal
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F-2-50 F-2-50