Overview; Printer Mechanism - Epson Stylus COLOR 760 Service Manual

EPSON Stylus COLOR 760

2.1 Overview

This section describes the operating principles of the printer mechanism and
electrical circuit boards. The EPSON Stylus COLOR 760 has the following
boards:
o
Main board: C298MAIN Board
o
Power supply board: C298PSB/PSE Board
o
Panel board: C298PNL Board

2.1.1 Printer Mechanism

Unlike other EPSON ink jet printers, the Stylus COLOR 760 uses DC motor for
power source. Use of the DC motor enable the printer to lower noise during
printing to a great extent. Table 2-1 shows the various motor types used in the
printer and their applications.
Table 2-1. Motor Types and Corresponding Applications
Motor Name Type
CR Motor DC with brush
PF Motor DC with brush
Operating Principles
Application / Feature
Used to drive the carriage making little noise. A
a linear scale is used to monitor the motor's
operating condition.
• Drives paper feeding rollers used to send
paper at specified speeds and load/eject
paper.
• Drive the ASF used to send paper to PF
roller.
• Drive CR Lock lever
When the CR unit is in the home position,
the CR lock lever is fixed the CR unit.
• Drive Pump Unit to absorb the ink
To monitor paper feeding pitch, a loop scale is
attached beside the high-precision gear.
The basic structure of the printer mechanism is mostly common to the Stylus
COLOR 400/600/440/640/740, except that the Stylus COLOR 760 uses a DC
motor.
Figure 2-1 shows the printer mechanism block diagram for the Stylus COLOR
760.
Intermittent Gear
PF Motor Pinion
PF Motor
Flashing Window
(80th column)
Star Wheel roller
Bk I/C Sensor
CMY I/C Sensor
Carriage Unit
Printhead (one unit)
Timing Belt
Cap Unit
(without a valve)
Pump Unit
CR Guide Shaft
PF Roller
Figure 2-1. Printer Mechanism Block Diagram
Overview
Revision C
Loop Scale
PF Drive Gear (high precision)
ASF Sensor
Detector Wheel
Loading Shaft
Photo Interrupter
(Encoder)
Loading Rollers
PE Sensor
Liner Scale
CR Motor (DC motor)
PG Lever
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