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Chapter 6
6-5
6.4 Driving and Controlling the High-Voltage System
6.4.1 Outline
0017-4333
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
The voltage generated by superimposing the DC voltage over the AC voltage is applied to the primary charging roller and developing cylinder, and a positive or
negative DC voltage is applied to the transfer charging roller according to the instruction of the CPU on the DC controller PCB.
The primary DC bias and developing DC bias are changed according to the image density information sent from the image processor PCB, thus adjusting the image
density.
A negative DC voltage is applied to the electrostatic discharge needle and fixing film.
F-6-6
6.5 Drum Unit
6.5.1 Outline of the Drum Unit
6.5.1.1 Outline
0017-4348
iR2022i / iR2025 / iR2030 / iR2018 / iR2022 / iR2018i
Major components of the drum unit are as follows:
F-6-7
[1] Photosensitive drum
[2] Cleaning blade
[3] Primary charging roller
ASIC
CPU
Primary bias
circuit
Fixing film bias
circuit
Transfer bias circuit
Remaining toner
level detection circuit
Static eliminator
bias circuit
JP3/JP4
JP9/JP10
JP7/JP8
Developing bias
circuit
JP1/JP2
High-voltage power
supply PCB
DC controller
PCB
J214 J100
Tr3
JP5/JP6
[3]
[1]
[2]
Содержание iR2030
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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 197: ...Chapter 7 Pickup Feeding System ...
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Страница 235: ...Chapter 9 External and Controls ...
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Страница 255: ...Chapter 10 RDS ...
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Страница 269: ...Chapter 11 Maintenance and Inspection ...
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Страница 275: ...Chapter 12 Standards and Adjustments ...
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Страница 283: ...Chapter 13 Correcting Faulty Images ...
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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 301: ...Chapter 14 Self Diagnosis ...
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Страница 317: ...Chapter 15 Service Mode ...
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Страница 381: ...Chapter 16 Upgrading ...
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Страница 411: ...Chapter 17 Service Tools ...
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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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