Overview; Mechanical Components - Epson Stylus PHOTO RX640 Service Manual

EPSON Stylus PHOTO RX640/650

2.1 Overview

This Chapter describes the operating principles of the mechanism and electric circuits
of Stylus PHOTO RX640/650.

2.1.1 Mechanical Components

The printer of Stylus PHOTO RX640/650 consists of the following major mechanisms:
Table 2-1. Mechanical Components 1
Mechanism
Moves on the CR Guide Shaft right and left and performs printing on
paper.
CR Assy
The Carriage Assy incorporates the Printhead, PW Sensor, and CR
Encoder. The power source is the CR Motor.
Controls the platen gap in four stages.
APG Assy
Detects the current height of the carriage with the APG Sensor, and
moves the carriage up and down, driven by the PF Motor.
PF Assy Driven by the PF Motor to turn the PF Roller Shaft for feeding paper.
ASF Assy Driven by the PF Motor to load paper into the Printer Mechanism.
Driven by the PF Motor to eject the paper (CD-R Tray).
As the Stacker is moved up and down (by manual operation), the paper
Eject Assy
eject frame moves up and down so that its height can be adjusted to the
media.
Located in the right end of the mechanism, performs capping the
I/S Assy Printhead, while it is not used, and sucking waste ink. The waste ink is
sent to the Waste Ink Tray via the Waste Ink Tube.
The units and circuit boards constituting Stylus PHOTO RX640/650 are as follows:
Table 2-2. Mechanical Components 2
Unit /Circuit
Board
Located on the Middle Housing, incorporating the USB I/F (for PC),
Main Board
card reader, and infrared communication function.
Power Supply Located on the Lower Housing. The power cable can be plugged in and
Board unplugged.
Panel Board Consists of two pieces located on the Middle Housing.
USB I/F Board Front USB I/F Board
Scanner Unit Incorporates the film scanner functions.
Operating Principles
Function/Description
Function/Description
CD-R Guide
Sensor
CD-R Tray
Sensor
Printhead
Eject Frame
Eject Roller Shaft
CR Lock Lever
Cap Assy
I/S Assy
Figure 2-1. Schematic Printer Mechanism
Overview
PF Encoder
APG Sensor
PF Roller Shaft
PW Sensor
CR Encoder
LD Roller
PE Sensor
CR Assy
CR Guide
Shaft
APG Assy
Revision A
PF Motor
ASF Assy
CR Motor
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