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]
Summary of Contents for imageRunner 2022
Page 1: ...Aug 8 2007 Service Manual iR2030 2025 2022 2018 Series ...
Page 2: ......
Page 6: ......
Page 20: ...Contents ...
Page 21: ...Chapter 1 Introduction ...
Page 22: ......
Page 57: ...Chapter 1 1 33 ...
Page 60: ......
Page 61: ...T 1 11 ...
Page 64: ......
Page 65: ...T 1 12 ...
Page 68: ......
Page 69: ...Chapter 2 Installation ...
Page 70: ......
Page 72: ......
Page 125: ...Chapter 2 2 53 ...
Page 126: ......
Page 127: ...Chapter 3 Main Controller ...
Page 128: ......
Page 130: ......
Page 142: ......
Page 143: ...Chapter 4 Original Exposure System ...
Page 144: ......
Page 170: ......
Page 171: ...Chapter 5 Laser Exposure ...
Page 172: ......
Page 174: ......
Page 181: ...Chapter 6 Image Formation ...
Page 182: ......
Page 184: ......
Page 196: ......
Page 197: ...Chapter 7 Pickup Feeding System ...
Page 198: ......
Page 217: ...Chapter 8 Fixing System ...
Page 218: ......
Page 220: ......
Page 234: ......
Page 235: ...Chapter 9 External and Controls ...
Page 236: ......
Page 255: ...Chapter 10 RDS ...
Page 256: ......
Page 258: ......
Page 268: ......
Page 269: ...Chapter 11 Maintenance and Inspection ...
Page 270: ......
Page 272: ......
Page 275: ...Chapter 12 Standards and Adjustments ...
Page 276: ......
Page 278: ......
Page 281: ...Chapter 12 12 3 ...
Page 282: ......
Page 283: ...Chapter 13 Correcting Faulty Images ...
Page 284: ......
Page 286: ......
Page 299: ...F 13 11 F 13 12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 ...
Page 300: ......
Page 301: ...Chapter 14 Self Diagnosis ...
Page 302: ......
Page 304: ......
Page 317: ...Chapter 15 Service Mode ...
Page 318: ......
Page 381: ...Chapter 16 Upgrading ...
Page 382: ......
Page 384: ......
Page 411: ...Chapter 17 Service Tools ...
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Page 417: ...Aug 8 2007 ...
Page 418: ......