Chapter 7
7-10
F-7-15
[1] Developing cylinder
[2] Photosensitive drum
[3] Primary transfer roller
[4] Primary charging roller
[5] Secondary transfer outer roller
[6] Primary charging AC high-voltage generation circuit
[7] Primary charging high-voltage generation circuit
[8] Developing AC high-voltage generation circuit
[9] Developing DC high-voltage generation circuit
[10] Primary transfer DC high-voltage generation circuit
[11] Secondary transfer DC high-voltage generation circuit
7.2.2 Generation of the Primary Charging Bias
0013-8475
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The primary charging bias is generated to charge the surface of the photosensitive drum to an even negative potential as preparatory work for image formation.
The bias is generated by the primary charging AC high-voltage generation circuit and the primary charging DC high-voltage generation circuit of HVT1.
The primary charging AC high-voltage generation circuit is used to generate the AC bias applied to the primary charging roller. It generates 4 types of biases
(PRI_AC_Y, PRI_AC_MJ, PRI_AC_C, PRI_AC_Bk), independent among individual colors.
The primary charging DC high-voltage generation circuit is used to generate the DC bias applied to the primary charging roller. It generates 2 types of biases
(PRI_DC_YMC, PRI_DC_Bk) for color and Bk.
The AC and DC biases that have been generated by these circuits are combined at such times as specified for application to the primary charging roller of the drum
unit.
The level of the primary charging bias varies in keeping with the instructions from the DC controller.
7.2.3 Generation of the Developing Bias
0013-8476
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The developing bias is used to retain toner over the static image formed on the surface of the photosensitive drum.
The bias is generated by the 2 circuits of HVT1: developing AC high-voltage generation circuit and DC high-voltage generation circuit.
The developing AC high-voltage generation circuit is used to generate the AC bias applied to the developing cylinder, producing 2 types of biases for color and Bk
(DEV_AC_YMC, DEV_AC_Bk).
The developing DC high-voltage generation circuit is used to generate the DC bias applied to the developing cylinder, producing 2 types of biases for color and Bk
(DEV_DC_YMC, DEV_DC_Bk).
HVT1
D-CON
HVT2
[6]
[7]
[8]
[9]
[11]
[10]
PRI_A
C_Y
PRI_A
C_M
PRI_A
C_C
PRI_A
C_Bk
PRI_DC_YMC
PRI_DC_Bk
TR2
TR2S
TR1S_Y
, TR1S_M, TR1S_C
, TR1S_Bk
TRI_Bk
TRI_C
TRI_M
TRI_Y
DEV_A
C_YMC
DEV_A
C_Bk
DEV_DC_YMC
DEV_DC_Bk
[4]
[1]
[2]
[3]
[5]
Summary of Contents for iR C3380 series
Page 1: ...Aug 29 2006 Service Manual iR C3380 2880 Series...
Page 2: ......
Page 6: ......
Page 23: ...Chapter 1 Introduction...
Page 24: ......
Page 26: ......
Page 52: ......
Page 53: ...Chapter 2 Installation...
Page 54: ......
Page 127: ...Chapter 3 Basic Operation...
Page 128: ......
Page 130: ......
Page 136: ......
Page 137: ...Chapter 4 Main Controller...
Page 138: ......
Page 160: ......
Page 161: ...Chapter 5 Original Exposure System...
Page 162: ......
Page 188: ...Chapter 5 5 24 F 5 68 4 Remove the original sensor 2 hook 1 F 5 69...
Page 189: ...Chapter 6 Laser Exposure...
Page 190: ......
Page 192: ......
Page 206: ......
Page 207: ...Chapter 7 Image Formation...
Page 208: ......
Page 256: ......
Page 257: ...Chapter 8 Pickup Feeding System...
Page 258: ......
Page 262: ......
Page 303: ...Chapter 9 Fixing System...
Page 304: ......
Page 306: ......
Page 321: ...Chapter 10 Externals and Controls...
Page 322: ......
Page 326: ......
Page 336: ...Chapter 10 10 10 F 10 10 2 Remove the check mark from SNMP Status Enabled...
Page 337: ...Chapter 10 10 11 F 10 11...
Page 359: ...Chapter 11 MEAP...
Page 360: ......
Page 362: ......
Page 401: ...Chapter 12 RDS...
Page 402: ......
Page 404: ......
Page 411: ...Chapter 13 Maintenance and Inspection...
Page 412: ......
Page 414: ......
Page 416: ...Chapter 13 13 2 F 13 1 8 9 1 2 3 3 5 6 7 10 11 12 13 14 4...
Page 421: ...Chapter 14 Standards and Adjustments...
Page 422: ......
Page 424: ......
Page 431: ...Chapter 15 Correcting Faulty Images...
Page 432: ......
Page 434: ......
Page 459: ...Chapter 16 Self Diagnosis...
Page 460: ......
Page 462: ......
Page 481: ...Chapter 17 Service Mode...
Page 482: ......
Page 484: ......
Page 571: ...Chapter 18 Upgrading...
Page 572: ......
Page 574: ......
Page 603: ...Chapter 19 Service Tools...
Page 604: ......
Page 606: ......
Page 609: ...Aug 29 2006...
Page 610: ......