Chapter 7
7-3
F-7-4
The following shows the sequence of operation:
[1] The machine executes a series of charging operations prior to an image formation session, thus stabilizing the potential of the drum.
[2] The machine executes image formation 1.
[3] The machine executes image formation 2.
7.4 Potential Control
7.4.1 Overview
0015-4479
iR5065 / iR 5055 / iR5075 / / /
The machine uses the following functions and control mechanisms associated with its potential control system:
1. copier/printer potential control
2. APC (auto power control) correction
3. primary current determination (VD control)
4. laser output determination (VL control)
5. post-laser illumination potential measurement (VDC control)
The following shows the construction of the machine's control system associated with potential control:
F-7-5
The following signals are associated with potential control:
[1] POT-DT, drum surface potential measurement
[2] POT-ON, if '1', turns on the potential sensor
7.4.2 Copier/Printer Potential Control
0015-4480
iR5065 / iR 5055 / iR5075 / / /
A. Timing and particulars of potential control
1. At the time of warm-up
The machine's potential control consists of copier potential control mechanisms and printer potential control mechanisms.
Drum motor (M1)
Pre-exposure LED
Primary charging
Pre-transfer charging bias (AC)
Grid bias
Developing clutch (CL4)
Developing bias (AC)
Developing bias (DC)
Dust-collecting roller bias (DC)
Separation charging bias (DC)
Laser activation
Main motor (M2)
Pre-transfer charging bias (DC)
Transfer charging
Separation charging bias (AC)
Start key ON
LSTR
STBY
STBY
INRT
Separation claw bias (AC)
[2]
[1]
[3]
Primary charging wire
Potential
sensor
Laser light
Developing cylinder
DC controller PCB
Laser driver PCB
Developing cylinder
Potential control PCB
Control
signal
Control
signal
Detection signal
J103
J3
1
2
3
4
B1
B2
B3
B4
0V
24V
POT-DT
POT-ON
[1]
[2]
Developing bias (DC) determination
Laser output level determination
Primary current determination
Summary of Contents for imageRUNNER 5065 series
Page 1: ...Feb 26 2007 Service Manual iR5075 5065 5055 Series ...
Page 2: ......
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Page 27: ...Chapter 1 Introduction ...
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Page 53: ...Chapter 2 Installation ...
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Page 98: ...Chapter 2 2 42 ...
Page 99: ...Chapter 3 Basic Operation ...
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Page 109: ...Chapter 4 Main Controller ...
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Page 129: ...Chapter 5 Original Exposure System ...
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Page 163: ...Chapter 6 Laser Exposure ...
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Page 173: ...Chapter 7 Image Formation ...
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Page 211: ...Chapter 8 Pickup Feeding System ...
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Page 263: ...Chapter 9 Fixing System ...
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Page 307: ...Chapter 10 External and Controls ...
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Page 321: ...Chapter 10 10 9 F 10 8 ...
Page 345: ...Chapter 11 MEAP ...
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Page 389: ...Chapter 12 RDS ...
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Page 399: ...Chapter 13 Maintenance and Inspection ...
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Page 411: ...Chapter 14 Standards and Adjustments ...
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Page 441: ...Chapter 15 Correcting Faulty Images ...
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Page 471: ...Chapter 16 Self Diagnosis ...
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Page 493: ...Chapter 17 Service Mode ...
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Page 553: ...Chapter 18 Upgrading ...
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Page 572: ...Chapter 18 18 16 F 18 29 2 Click Start F 18 30 3 When the session has ended click OK ...
Page 587: ...Chapter 18 18 31 F 18 59 2 Select the data to download F 18 60 3 Click Start ...
Page 589: ...Chapter 19 Service Tools ...
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