606
DP-C405/C305/C265
FEB 2008
Ver. 1.1
6.4.2.
Laser Exposure and Scanning
1.
Laser Exposure
As the OPC drum rotates, the uniformly charged OPC drum is exposed by the modulated laser beam.
The vertically-moving OPC drum passes in front of horizontally scanning laser beam, and the negative
charge on the OPC drum surface are neutralized by the laser beam. This forms a latent image.
Laser output power is either approximately 0.075 mW (1200 dpi), 0.13 mW (600 dpi, Color) or 0.21
mW (600 dpi, Mono) on the OPC drum surface, depending on whether the printer is printing resolution
in 1200 dpi mode, or 600 dpi mode. The laser exposure, the negative potential on the OPC drum varies
from approximately -430 volts (unexposed) to -60 volts (fully exposed).
2.
Laser Scanning
A laser diode generates the laser beam, and lenses and mirror in the laser scanner direct the beam to
the OPC drum. The beam is parallel to the collimator lens, and is directed at the rotating polygonal
mirror, attached with the polygon motor. The beam is parallel to the collimator lens, and is directed at
the rotating polygon mirror. The polygon mirror rotates at approximately 24,800 to 40,000 constant
revolutions per minute.
This transforms the beam into a horizontally scanning beam, which is directed through the primary and
the secondary lens, altering the beam’s angular rotation motion into a constant horizontal motion. The
cylindrical mirrors corrects the beam for any vertical mis-registration. Next, the beam reflects off of a
mirror, and passes through a window where it scans across the rotating OPC drum. At the beginning of
each horizontal sweep, the horizontal sync mirrors deflect the laser beam to the horizontal sync sensor.
This informs the engine control board that the laser beam is beginning its horizontal sweep, and that it
can begin to modulate the signal with the data to be printed on that line of the image.
Intermediate
Transfer Belt
Polygon
Motor
First Bias Transfer Roller (FTR)
Toner
Cartridge
Y
Toner
Cartridge
M
Toner
Cartridge
C
Toner
Cartridge
BK
Laser Scanning Unit (LSU)
Mirror
Laser Beam
OPC
Drum
Y
OPC
Drum
M
OPC
Drum
C
OPC
Drum
BK
Содержание Workio DP-C265
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Страница 6: ...6 For PB and Other Destinations not for PU USA Canada ...
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Страница 14: ...14 memo ...
Страница 220: ...220 FEB 2008 Ver 1 1 DP C405 C305 C265 Color Test Chart 101 P N PJQRC0119Z LDR PJQRC0120Z A3 ...
Страница 232: ...232 FEB 2008 Ver 1 1 DP C405 C305 C265 3 20 720K PM Kit DQ M35S72 DQ M32N72 ...
Страница 400: ...400 FEB 2008 Ver 1 1 DP C405 C305 C265 LVPS CN6 LVPS CN7 Refer to SCN PC Board ...
Страница 401: ...401 FEB 2008 Ver 1 1 DP C405 C305 C265 LVPS CN8 Europe Specification Only ...
Страница 402: ...402 FEB 2008 Ver 1 1 DP C405 C305 C265 3 32 Optional LVPS Optional LVPS CN64 Optional LVPS CN65 Optional LVPS CN66 ...
Страница 403: ...403 FEB 2008 Ver 1 1 DP C405 C305 C265 3 33 CST PC Board CST PCB CN601 Refer to EC PC Board CST PCB CN602 ...
Страница 404: ...404 FEB 2008 Ver 1 1 DP C405 C305 C265 CST PCB CN603 CST PCB CN604 ...
Страница 405: ...405 FEB 2008 Ver 1 1 DP C405 C305 C265 CST PCB CN605 ...
Страница 406: ...406 FEB 2008 Ver 1 1 DP C405 C305 C265 ...
Страница 407: ...407 FEB 2008 Ver 1 1 DP C405 C305 C265 CST PCB CN606 ...
Страница 408: ...408 FEB 2008 Ver 1 1 DP C405 C305 C265 ...
Страница 409: ...409 FEB 2008 Ver 1 1 DP C405 C305 C265 CST PCB CN607 ...
Страница 410: ...410 FEB 2008 Ver 1 1 DP C405 C305 C265 CST PCB CN608 ...
Страница 411: ...411 FEB 2008 Ver 1 1 DP C405 C305 C265 3 34 TRU PC Board TRU PCB CN611 Refer to EC PC Board TRU PCB CN612 ...
Страница 412: ...412 FEB 2008 Ver 1 1 DP C405 C305 C265 TRU PCB CN613 ...
Страница 414: ...414 FEB 2008 Ver 1 1 DP C405 C305 C265 RLB PCB CN176 ...
Страница 615: ...615 DP C405 C305 C265 FEB 2008 Ver 1 1 1 2 3 4 5 6 7 8 ...
Страница 630: ...630 DP C405 C305 C265 FEB 2008 Ver 1 1 1 10 4 7 5 2 6 3 Scanner Unit Packing Printer Unit Packing 1 2 7 8 5 6 9 3 4 8 9 ...
Страница 752: ...752 FEB 2008 Ver 1 1 DP C405 C305 C265 memo ...
Страница 847: ...847 DP C405 C305 C265 FEB 2008 Ver 1 1 2 Motor PCBs Fig 5 009 M1 M2 M8 M5 M4 M3 M7 M6 1 ...
Страница 883: ...DZSD001829 15 Panasonic Software Operating Instructions Network Firmware Update Tool for Service Technicians Version 3 ...
Страница 896: ...Network Firmware Update Tool LAN Page 14 13 Confirm the message in the text box and click OK to close the tool or ...
Страница 897: ...DZSD000965 18 Panasonic Software Operating Instructions Local Firmware Update Tool for Service Technicians Version 3 ...
Страница 911: ...PJQMC1131ZA Panasonic Software Operating Instructions SD Card Firmware Writing Tool for Service Technicians Version 1 ...
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Страница 920: ...Published in Japan ...