Image Processing - Muratec MFX-2500 Field Engineering Manual

2.4.2 Image Processing

1. PC Drum
The drum is an aluminum cylinder coated with photosensitive material on which an electrostatic latent
image is produced.
2. Drum Charging
A scorotron charger employing a comb electrode generates a negative DC charged layer on the
surface of the PC Drum.
3. Photoelectric Conversion Section
The Exposure Lamp directs light onto the original. The light reflected off the original is directed and
resized by the mirrors and lens so as to produce a reduced-size image on the CCD Sensor.
4. HGB Board
Converts an electric signal into a corresponding 8-bit digital image signal (A/D conver-sion), makes
various corrections, and outputs the results to the MFB Board.
5. MFB Board
Compresses the image data received from the HGB Board, stores it, and uncompresses it.
6. Laser Exposure
The laser beam emitted from the LD (laser diode) strikes the surface of the PC Drum, creating an
electrostatic latent image.
7. Development
Negatively charged toner adheres to the latent image on the PC Drum surface, creating a visible
image.
8. Paper Feed
Feeds sheets of paper from the appropriate paper source.
9. Image Transfer
An Image Transfer Roller is used. A positive charge applied to the roller causes the visible image on
the surface of the PC Drum to transfer onto the front side of the paper.
10.Paper Separation
The PC Drum Separator Fingers remove paper from the surface of the PC Drum.
11.Cleaning
The Cleaning Blade scrapes residual toner off the surface of the PC Drum and the toner is recycled
back to the Developing Unit.
12.Erase
The PC Drum is exposed to light, which effectively removes any residual charge from the drum
surface.
13.Fusing
Heat and pressure applied by the Right and Left Fusing Rollers fuse toner on the paper.
14.Paper Exit
Feeds paper out of the machine.
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