193
UF-7000/8000
APR 2007
Ver. 2.1
UF-7100/8100
6.3.4.
Laser Scan Unit (Exposure)
6.3.4.1.
Operation Theory
The light beam from the Laser Diode (light source) is modulated by the digital signal (nVIDEO) and
converted to parallel light waves by the Collimator Lens. The beam is then sent to the rotating Polygon
Mirror (polygon scanner), where it is reflected through the
Lens and then focused onto the OPC Drum
surface. The diameter of the beam is about 80
µ
m, and the light moves across the surface of the OPC Drum
in the scanning direction of right to left. As the drum rotates (sub-scans), a static image is formed where the
laser beam touches the drum surface.
The laser beam is also deflected to the Timing Sensor. This sensor controls the start timing of scanning on
the drum, providing a consistent left margin. The CPU uses the Timing Sensor to detect abnormal signals.
6.3.4.2.
Laser Beam
The laser beam is pulsed On and Off by the digital signal (nVIDEO) to form a latent image of two different
voltage potentials on the drum, as shown below.
Laser Diode Specification
Item
Minimum
Standard
Maximum
Oscillation Wavelength
770
785
800
nm
Output Light Power
(OPC Drum Surface)
0.315
0.350
0.385
mW
Содержание Panafax UF-8100
Страница 9: ...Table of Contents 9 Schematic Diagram 303 10 1 General Circuit Diagram 303 ...
Страница 122: ...122 UF 7000 8000 APR 2007 Ver 2 1 UF 7100 8100 Sensor and Switch Location ...
Страница 190: ...190 UF 7000 8000 APR 2007 Ver 2 1 UF 7100 8100 6 3 Printer Receive Mechanism 6 3 1 Component Layout and Paper Path ...
Страница 239: ...239 UF 7000 8000 APR 2007 Ver 2 1 UF 7100 8100 7 Installation Refer to Quick Guide For Facsimile and Copy Functions ...
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Страница 321: ...DZSD000965 17 Panasonic Software Operating Instructions Local Firmware Update Tool for Service Technicians Version 3 ...
Страница 332: ...Local Firmware Update Tool Parallel USB Port Page 12 5b4 Firmware Code File selection is completed Click Next ...
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