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Chapter 5
5-2
5.1.4 Control System Configuration
0017-2648
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
The laser exposure system is controlled mainly by the IC5 on the DC controller PCB.
Main control types are as follows:
[1] Laser emission ON/OFF control/video signal input
[2] Horizontal synchronization control
[3] Laser scanner motor control
[4] Automatic photocurrent control (APC)
F-5-2
5.2 Various Controls
5.2.1 Controlling the Laser Activation Timing
5.2.1.1 Laser Emission ON/OFF Control
0017-3094
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
The purpose of this control is to turn ON/OFF the laser diode (LD) in response to video signals.
The DC controller PCB sends laser control signals (CNTRL0, CNTRL1, and CNTRL2), which are used to switch between laser driver operation modes, to the laser
driver IC along with video signals (VDO1, /VDO1, VDO2, and /VDO2). The laser driver IC controls laser emission (ON/OFF) according to the combination of
CNTRL0, CNTRL1, and CNTRL2 signals.
[2] Laser mirror 1 (loop-back mirror)
Reflects a laser beam toward laser mirror 2.
[3] Laser mirror 2 (loop-back mirror)
Reflects a laser beam toward the photoconductor drum.
[4] BD PCB
Generates a BD signal.
[5] Polygonal mirror
Scans the photoconductive drum with a laser beam in the main
scan direction.
[6] Laser unit
Emits laser beams.
[7] BD mirror
Reflects a laser beam toward the BD PCB.
Name
Function
[4]
Image Processor
PCB
DC Controller PCB
J314
J207
J206
J205
IC5
[2]
[3]
[1]
Содержание iR2030
Страница 1: ...Aug 8 2007 Service Manual iR2030 2025 2022 2018 Series ...
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Страница 69: ...Chapter 2 Installation ...
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Страница 127: ...Chapter 3 Main Controller ...
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Страница 143: ...Chapter 4 Original Exposure System ...
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Страница 171: ...Chapter 5 Laser Exposure ...
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Страница 181: ...Chapter 6 Image Formation ...
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Страница 269: ...Chapter 11 Maintenance and Inspection ...
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Страница 299: ...F 13 11 F 13 12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 ...
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Страница 381: ...Chapter 16 Upgrading ...
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Страница 413: ...Contents Contents 17 1 Service Tools 17 1 17 1 1 Special Tools 17 1 17 1 2 Oils and Solvents 17 1 ...
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Страница 417: ...Aug 8 2007 ...
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