Copy Process - Minolta Di151 Service Manual

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COPY PROCESS

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1. PC Drum
• Used as the medium on which a visible developed image of the original is formed.
2. Drum Charging
• A uniform negative DC charge is deposited across the entire surface of the PC Drum.
3. Photoelectric Conversion
• CCD converts the image data represented by light reflected off the original to a corre-
sponding electrical signal which, in turn, is output to IR image-processing section.
4. IR Image-Processing
• The electrical signal is converted to an 8-bit digital image signal (A/D conversion) which,
in turn, goes through appropriate correction before being output to the PH Section.
5. PH Image Processing
• After going through corrections, the digital image signal is converted to a corresponding
electrical signal (D/A conversion) that controls the intensity of the light from the laser
diode.
6. Laser Exposure
• The laser beam strikes the surface of the PC Drum, forming an electrostatic latent image.
7. Developing
• Toner adheres to the electrostatic latent image on the PC Drum surface, creating a visible
image.
• A DC (-) bias voltage is applied to the Sleeve Roller to charge toner.
8. Paper Feeding
• Paper is fed from either the Paper Tray or Manual Bypass Tray.
9. Image Transfer
• A DC (+) bias voltage is applied to the Image Transfer Roller to transfer the visible toner
image formed on the PC Drum surface to the paper.
10. Cleaning
• Residual toner on the surface of the PC Drum is scraped off.
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