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
Содержание iR C2880 series
Страница 1: ...Aug 29 2006 Service Manual iR C3380 2880 Series ...
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Страница 23: ...Chapter 1 Introduction ...
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Страница 53: ...Chapter 2 Installation ...
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Страница 127: ...Chapter 3 Basic Operation ...
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Страница 137: ...Chapter 4 Main Controller ...
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Страница 161: ...Chapter 5 Original Exposure System ...
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Страница 188: ...Chapter 5 5 24 F 5 68 4 Remove the original sensor 2 hook 1 F 5 69 ...
Страница 189: ...Chapter 6 Laser Exposure ...
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Страница 207: ...Chapter 7 Image Formation ...
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Страница 257: ...Chapter 8 Pickup Feeding System ...
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Страница 303: ...Chapter 9 Fixing System ...
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Страница 321: ...Chapter 10 Externals and Controls ...
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Страница 336: ...Chapter 10 10 10 F 10 10 2 Remove the check mark from SNMP Status Enabled ...
Страница 337: ...Chapter 10 10 11 F 10 11 ...
Страница 359: ...Chapter 11 MEAP ...
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Страница 401: ...Chapter 12 RDS ...
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Страница 411: ...Chapter 13 Maintenance and Inspection ...
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Страница 416: ...Chapter 13 13 2 F 13 1 8 9 1 2 3 3 5 6 7 10 11 12 13 14 4 ...
Страница 421: ...Chapter 14 Standards and Adjustments ...
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Страница 431: ...Chapter 15 Correcting Faulty Images ...
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Страница 459: ...Chapter 16 Self Diagnosis ...
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Страница 481: ...Chapter 17 Service Mode ...
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Страница 571: ...Chapter 18 Upgrading ...
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Страница 603: ...Chapter 19 Service Tools ...
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Страница 605: ...Contents Contents 19 1 Service Tools 19 1 19 1 1 Special Tools 19 1 19 1 2 Solvents and Oils 19 2 ...
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Страница 609: ...Aug 29 2006 ...
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