Chapter 7
7-3
7.2 Controlling the Laser
7.2.1 Overview
0019-5007
The laser control is to allow the laser driver to turn the laser diode ON/OFF according to the laser control signals sent from the DC controller.
There are two laser driver PCBs: one is for M/C and the other is for Y/Bk. The configurations of both PCBs are identical.
In the case of the laser driver for M/C
F-7-2
The DC controller sends the following signals to each laser driver IC (IC1, IC2).
- video signals (VDO, /VDO) for the image formation
- laser control signals (CTRL 0 to 2) for switching the operational mode of the laser driver circuit
- laser light intensity switch signal (LDPWRH) for switching the laser light intensity
The laser driver IC controls the laser according to the combination of the laser control signals.
+5V
DC controller PCB
Laser driver PCB
Cyan laser driver circuit
LD2CTRL0
LD2CTRL1
LD2CTRL2
VDO21,/VDO21
VDO22,/VDO22
LD2PDOUT
Magenta laser driver circuit
LD1CTRL0
LD1CTRL1
LD1CTRL2
VDO11,/VDO11
VDO12,/VDO12
LD1PDOUT
+5V
LDPWRH
IC2
LD2
BD circuit
LD1
LD2
PD
IC1
LD1
LD1
LD2
PD
C8
C14
/BD1I
Light intensity
switching
circuit
Summary of Contents for iR C1020 Series
Page 1: ...Sep 8 2008 Service Manual iR C1020 Series iR C1021i ...
Page 2: ......
Page 6: ......
Page 18: ...Contents ...
Page 19: ...Chapter 1 Introduction ...
Page 20: ......
Page 22: ......
Page 57: ...Chapter 2 Installation ...
Page 58: ......
Page 60: ......
Page 73: ...Chapter 3 Basic Operation ...
Page 74: ......
Page 76: ......
Page 81: ...Chapter 4 Main Controller ...
Page 82: ......
Page 84: ......
Page 97: ...Chapter 5 Original Exposure System ...
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Page 100: ......
Page 112: ......
Page 113: ...Chapter 6 Original Feeding System ...
Page 114: ......
Page 116: ......
Page 132: ......
Page 133: ...Chapter 7 Laser Exposure ...
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Page 143: ...Chapter 8 Image Formation ...
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Page 181: ...Chapter 9 Pickup and Feed System ...
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Page 213: ...Chapter 9 9 29 F 9 79 1 2 3 ...
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Page 215: ...Chapter 10 Fixing System ...
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Page 233: ...Chapter 11 External and Controls ...
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Page 263: ...Chapter 12 e maintenance imageWARE Remote ...
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Page 275: ...Chapter 12 12 9 F 12 27 ...
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Page 281: ...Chapter 13 Maintenance and Inspection ...
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Page 287: ...Chapter 14 Measurement and Adjustments ...
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Page 293: ...Chapter 15 Correcting Faulty Images ...
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Page 317: ...Chapter 16 Error Code ...
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Page 331: ...Chapter 16 16 11 ...
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Page 333: ...Chapter 17 Special Management Mode ...
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Page 343: ...Chapter 17 17 7 ...
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Page 345: ...Chapter 18 Service Mode ...
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Page 388: ......
Page 389: ...Chapter 19 Upgrading ...
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Page 396: ...Chapter 19 19 4 3 Click Next F 19 4 4 Select a USB connected device and click Next F 19 5 ...
Page 397: ...Chapter 19 19 5 5 Click Start F 19 6 6 Click Yes F 19 7 Download will be started F 19 8 ...
Page 399: ...Chapter 19 19 7 ...
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Page 401: ...Chapter 20 Service Tools ...
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Page 407: ...Sep 8 2008 ...
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