Chapter 6
6-3
7) As the 6-facet mirror rotates at a specific speed, the laser beam scans the surface of the photosensitive drum accordingly.
8) As the 6-facet mirror rotates and, as a result, the laser beams scan the surface of the photosensitive drum at a specific speed, a static image of multiple colors is
formed on the drum surface.
1 : The machine's BD circuit is found on its CBk driver PCB, and the BD signal occurs in keeping with the activation of the laser diode of the Bk driver.
2 : 1-Polygon 4-Laser Method
The term refers to a method in which a single polygon mirror is used for 4 laser beams. There are 4 laser diodes, the beams of which are directed to a multiple-facet
mirror mounted on a single scanner motor. The method inherently brings about a reduction in space.
6.2 Various Control
6.2.1 Controlling the Laser Activation Timing
6.2.1.1 Turning On and Off the Laser Light
0013-8532
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The laser light goes on and off when the laser diode of the laser driver PCB goes on and off at a specific intensity. The machine's laser driver PCB consists of 2
PCBs (Y/M laser driver PCB, C/Bk laser driver PCB), each with 2 systems of driver circuitry. The circuit turns on and off the laser light of individual colors ac-
cording to the combination of laser control signals (LC_CTL0/LC_CTL1) coming from the DC controller.
T-6-5
F-6-2
[1] Y/M laser driver
[2] Y laser control signal
[3] M laser control signal
[4] C laser control signal
[5] Bk laser control signal
[6] C/Bk laser driver
In the forced outage mode, the intensity settings made through APC are cancelled.
MEMO: Controlling Laser Activation for a Resolution of 1200 dpi
To enable highly detailed reproduction of images, the machine switches the resolution in main scanning direction and sub scanning direction from 600 to 1200 dpi.
At such times, the laser output (intensity) is reduced by 1/2 for main scanning direction, while the speed is reduced by 1/2 for sub scanning direction.
Laser control signal
Operation
Laser state
LC_CTL0
LC_CTL1
0
0
forced off
OFF
0
1
APC
ON
1
0
printing
video signal input permitted
1
1
standby
OFF
[2] [3]
[4]
[5]
[1]
[6]
D-CON
Summary of Contents for iR C3380 series
Page 1: ...Aug 29 2006 Service Manual iR C3380 2880 Series...
Page 2: ......
Page 6: ......
Page 23: ...Chapter 1 Introduction...
Page 24: ......
Page 26: ......
Page 52: ......
Page 53: ...Chapter 2 Installation...
Page 54: ......
Page 127: ...Chapter 3 Basic Operation...
Page 128: ......
Page 130: ......
Page 136: ......
Page 137: ...Chapter 4 Main Controller...
Page 138: ......
Page 160: ......
Page 161: ...Chapter 5 Original Exposure System...
Page 162: ......
Page 188: ...Chapter 5 5 24 F 5 68 4 Remove the original sensor 2 hook 1 F 5 69...
Page 189: ...Chapter 6 Laser Exposure...
Page 190: ......
Page 192: ......
Page 206: ......
Page 207: ...Chapter 7 Image Formation...
Page 208: ......
Page 256: ......
Page 257: ...Chapter 8 Pickup Feeding System...
Page 258: ......
Page 262: ......
Page 303: ...Chapter 9 Fixing System...
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Page 306: ......
Page 321: ...Chapter 10 Externals and Controls...
Page 322: ......
Page 326: ......
Page 336: ...Chapter 10 10 10 F 10 10 2 Remove the check mark from SNMP Status Enabled...
Page 337: ...Chapter 10 10 11 F 10 11...
Page 359: ...Chapter 11 MEAP...
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Page 362: ......
Page 401: ...Chapter 12 RDS...
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Page 404: ......
Page 411: ...Chapter 13 Maintenance and Inspection...
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Page 414: ......
Page 416: ...Chapter 13 13 2 F 13 1 8 9 1 2 3 3 5 6 7 10 11 12 13 14 4...
Page 421: ...Chapter 14 Standards and Adjustments...
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Page 424: ......
Page 431: ...Chapter 15 Correcting Faulty Images...
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Page 434: ......
Page 459: ...Chapter 16 Self Diagnosis...
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Page 462: ......
Page 481: ...Chapter 17 Service Mode...
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Page 484: ......
Page 571: ...Chapter 18 Upgrading...
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Page 574: ......
Page 603: ...Chapter 19 Service Tools...
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Page 609: ...Aug 29 2006...
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