Epson Stylus Photo RX650 - Chapter 2 Operating Principles; Overview; Mechanical Components

EPSON Stylus PHOTO RX640/650 Revision A
Operating Principles Overview 16
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:
The units and circuit boards constituting Stylus PHOTO RX640/650 are as follows:
Figure 2-1. Schematic Printer Mechanism
Table 2-1. Mechanical Components 1
Mechanism Function/Description
CR Assy
Moves on the CR Guide Shaft right and left and performs printing on
paper.
The Carriage Assy incorporates the Printhead, PW Sensor, and CR
Encoder. The power source is the CR Motor.
APG Assy
Controls the platen gap in four stages.
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.
Eject Assy
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 frame moves up and down so that its height can be adjusted to the
media.
I/S Assy
Located in the right end of the mechanism, performs capping the
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.
Table 2-2. Mechanical Components 2
Unit /Circuit
Board
Function/Description
Main Board
Located on the Middle Housing, incorporating the USB I/F (for PC),
card reader, and infrared communication function.
Power Supply
Board
Located on the Lower Housing. The power cable can be plugged in and
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.
PF Encoder
CD-R Guide
Sensor
PW Sensor
APG Sensor
CD-R Tray
Sensor
Printhead
PF Motor
PF Roller Shaft
CR Encoder
LD Roller
PE Sensor
CR Assy
ASF Assy
CR Motor
APG Assy
CR Guide
Shaft
Eject Frame
Eject Roller Shaft
I/S Assy
Cap Assy
CR Lock Lever