Chapter 6
6-5
F-6-4
[1] Y/M laser driver
[2] BD circuit
[3] C/Bk laser driver
1BD Control Method
Owing to the spatial relationship between the BD circuit and the laser diode, the machine is not capable of detecting the BD signal of each color individually. As
such, it uses the BD signal of Bk to serve as the reference BD signal when generating the BD signal for Y, M, and C.
The following is a timing chart depicting the relationship of the BD signals of individual colors and the video signals:
F-6-5
[1] Reference BD
6.2.1.3 Controlling Synchronization in Sub Scanning Direction
0013-8534
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The machine executes synchronization in sub scanning direction so as to match the lead edge of an image and the lead edge of paper. This control is executed for
every color, and is controlled by the DC controller.
The following is the sequence of operation:
1) When the print command arrives, the DC controller generates the sub scanning sync signal (PTOP) with reference to its internal timer.
2) The DC controller generates the sub scanning sync signals (Y-TOP, M-TOP, C-TOP, Bk-TOP) of individual colors based on the PTOP signal, and sends them
to the main controller.
3) When these signals arrive, the main controller generates video signals (VDO Y, VDO M, VDO C, VDO Bk) a specific period of time thereafter, and sends them
to the DC controller. As a result, the laser drivers of individual colors go on to emit laser beams that scan the surface of the photosensitive drum starting at a
specific point.
[1]
[3]
[2]
Laser Dr
iv
e Signal
Y
, M
Laser Dr
iv
e Signal
CB
k
BD RA
W1
BD Y
BD M
BD C
BD Bk
VDO Y
VDO M
VDO C
VDO Bk
D-CON
M-CON
[1]
VDO (C,Bk)
VDO (Y,M)
VDO
VDO
T1
T2
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...
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Page 606: ......
Page 609: ...Aug 29 2006...
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