Overview; Printer Mechanism Operating Principles; General Description - Epson Stylus COLOR 800 Service Manual

2.1 Overview

This chapter provides information on the printer mechanism, electrical circuit, and ink system. The
operating principles for each mechanism in the printer mechanism is described individually. The
description for the electrical circuit is divided into 2 parts; C202 PSB/PSE board and C202 MAIN board.

2.2 Printer Mechanism Operating Principles

2.2.1 General Description

This printer is mainly composed of the printing mechanism, paper feed mechanism, carriage mechanism,
pump mechanism, and ASF mechanism. There are 3 motors, carriage motor (CR motor), paper feed
motor, (PF motor) and pump motor. Table 2-1 shows each motor and corresponding units and assemblies
driven.
PF motor
CR motor
Pump motor
When the PF Motor rotates clockwise, the torque is used to drive PF Roller assembly and release CR
Lock Lever, while the torque is used to set the CR Lock Lever when the PF Motor rotates
counterclockwise.
The CR motor transmit the torque via Timing Belt to shift the CR unit in the both right and left directions in
parallel with the Platen. The torque from the Pump Motor, switched by the disengage mechanism, is
transmitted to the ASF and the Pump motor. The figure below shows the structure block of the printer
mechanism.
Rev. A
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Table 2-1. Motor and Unit/Assembly Driven
Motor
PF roller assembly, CR lock lever
CR unit, Capping unit
Pump unit, Capping unit, Wiper, ASF unit
Figure 2-1. Printer Mechanism Block Diagram
Unit/Assembly driven
Operating Principles
2-1