Print Process; Print Process Overview - Epson AcuLaser C4000 Service Manual

EPSON AcuLaser C4000/C4100/C3000

2.1 Print Process

2.1.1 Print Process Overview

This printer is a "full color laser printer" that uses the principle of
electrophotographic recording. Each YMCK color (yellow, magenta, cyan,
black) has its own special drum and developer that are used in tandem, three
Intermediate Data Transfer rollers are coordinated (2 IDT 1 rollers, 1 IDT 2
roller), and at the end of the process the layered color toner images produce a
full color print.
The major steps of the print process are described below:
1) Charging: The drum surfaces are charged with electricity.
2) Exposure: Image areas are exposed on drums with laser radiation.
3) Developing: Image areas on drums are developed with toner.
4) Primary transfer:
The toner image on drums is transferred to transfer rollers (IDT1).
5) Secondary transfer:
The toner images on primary transfer rollers (IDT 1) are transferred to the
secondary transfer roller (IDT 2).
6) Cleaning: Primary transfer rollers (IDT 1) are cleaned.
7) Tertiary transfer:
The complete four-color toner image on the secondary transfer roller (IDT
2) is transferred to the paper.
8) Cleaning: Secondary transfer roller (IDT 2) is cleaned.
9) Electrical charge removal: The electrical charge of the paper is discharged.
10) Fusing: Toner on the paper is fixed with heat and pressure.
11) Cleaning: Residual toner on the drums and transfer rollers is collected.
Operating Principles
Figure 2-1. Print Process Overview
Print Process
Revision F
2-56