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Chapter 5
5-3
The following table shows combinations of laser control signals (CNTRL0, CNTRL1, and CNTRL2).
T-5-3
5.2.1.2 Horizontal Synchronization Control
0017-3096
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
The purpose of this control is to adjust the position where scanning starts in the horizontal direction (main scan direction) of the image with reference to the hori-
zontal synchronization signal (/BD) sent from the BD sensor in the laser scanner. The horizontal synchronization signal is also used as a vertical synchronization
signal to recognize the leading edge of paper. Upon detection of arrival of the fed paper at the prescribed position, the DC controller PCB starts sending the /BD
signal to the image porcessor PCB. The image processor PCB recognizes the leading edge of paper at the start of the continuous /BD signal; it recognizes the trailing
edge of paper at the end of the continuous /BD signal.
5.2.2 Controlling the Intensity of Laser Light
5.2.2.1 Automatic Photocurrent Control (APC)
0017-3097
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
The purpose of this control is to monitor the laser beam emitted to the photodiode on the laser driver circuit board in order to adjust the light quantity.
5.2.3 Controlling the Laser Scanner Motor
5.2.3.1 Laser Scanner Motor Control
0017-3098
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
Laser control signal
Laser status
Description
CTL2
CTL1
CTL0
Laser A
Laser B
0
0
0
OFF
OFF
Laser control OFF
1
1
1
Video signal input
enable
Laser beams can be emitted in
response to video signals.
1
1
0
ON
OFF
Forced emission of laser A (for
adjustment in factory)
1
0
1
OFF
ON
Forced emission of laser B (for
adjustment in factory)
1
0
0
ON
ON
Forced emission of laser A and
laser B (for adjustment in
factory)
0
1
0
ON
OFF
APC over laser A
0
0
1
OFF
ON
APC over laser B
0
1
1
OFF
OFF
Forced stop of laser emission
MEMO:
About Generation of BD Signal
The BD sensor on the BD circuit board receives only the beam of laser B; it does not receive the beam of laser A. The BD signal is generated from the beam of laser A.
Summary of Contents for imageRunner 2022
Page 1: ...Aug 8 2007 Service Manual iR2030 2025 2022 2018 Series ...
Page 2: ......
Page 6: ......
Page 20: ...Contents ...
Page 21: ...Chapter 1 Introduction ...
Page 22: ......
Page 57: ...Chapter 1 1 33 ...
Page 60: ......
Page 61: ...T 1 11 ...
Page 64: ......
Page 65: ...T 1 12 ...
Page 68: ......
Page 69: ...Chapter 2 Installation ...
Page 70: ......
Page 72: ......
Page 125: ...Chapter 2 2 53 ...
Page 126: ......
Page 127: ...Chapter 3 Main Controller ...
Page 128: ......
Page 130: ......
Page 142: ......
Page 143: ...Chapter 4 Original Exposure System ...
Page 144: ......
Page 170: ......
Page 171: ...Chapter 5 Laser Exposure ...
Page 172: ......
Page 174: ......
Page 181: ...Chapter 6 Image Formation ...
Page 182: ......
Page 184: ......
Page 196: ......
Page 197: ...Chapter 7 Pickup Feeding System ...
Page 198: ......
Page 217: ...Chapter 8 Fixing System ...
Page 218: ......
Page 220: ......
Page 234: ......
Page 235: ...Chapter 9 External and Controls ...
Page 236: ......
Page 255: ...Chapter 10 RDS ...
Page 256: ......
Page 258: ......
Page 268: ......
Page 269: ...Chapter 11 Maintenance and Inspection ...
Page 270: ......
Page 272: ......
Page 275: ...Chapter 12 Standards and Adjustments ...
Page 276: ......
Page 278: ......
Page 281: ...Chapter 12 12 3 ...
Page 282: ......
Page 283: ...Chapter 13 Correcting Faulty Images ...
Page 284: ......
Page 286: ......
Page 299: ...F 13 11 F 13 12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 ...
Page 300: ......
Page 301: ...Chapter 14 Self Diagnosis ...
Page 302: ......
Page 304: ......
Page 317: ...Chapter 15 Service Mode ...
Page 318: ......
Page 381: ...Chapter 16 Upgrading ...
Page 382: ......
Page 384: ......
Page 411: ...Chapter 17 Service Tools ...
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Page 414: ......
Page 417: ...Aug 8 2007 ...
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