Xerox DocuPrint N2025, Руководство по обслуживанию, Страница: 283 / 378

02/2000
6-51 DocuPrint N2025/N2825
GP 5.1
General Procedures / Information Initial Issue
GP 5.1 Print Process Overview
Print Process Overview
The N2025/N2825 printer uses the Xerographic process to print an image on paper using
video data sent from the Controller. The Xerographic process consists of seven steps: Figure 1
1. Charge
A bias charge roll places a uniform negative electric charge on the drum surface.
2. Exposure
The laser scanner scans the drum surface with a very thin beam of laser light modulated
according to the signal from the Controller to form an invisible electrostatic latent image
on the drum surface.
3. Development
Attracts toner to the electrostatic latent image on the drum surface to form a visible toner
image.
4. Transfer
Transfers the toner image from the drum surface to the paper.
5. Detack
Partially neutralizes the charge on the paper to allow the paper peel off the drum surface.
6. Fusing
Permanently fixes the toner image to the paper by heat and pressure.
7. Cleaning
Cleans the drum surface of the remaining toner.
Figure 1 Xerographic Process
The drum surface is passed through the Charge, Expose, Develop, Transfer, Detack, and Clean
steps by rotating the drum to form an image of toner on the drum surface and transfer the toner
image to paper. Paper is passed through the Transfer, Detack, and the Fuse steps by the paper
transportation mechanism and is registered to the image to transfer the toner image from the
drum surface to it and to fix the toner image.
Figure 2 the major components that are directly related to the print process and the paper
transportation.
Figure 2 Print Process and Paper Transportation