Overview; Printer Mechanism - Epson Stylus Photo R280 Service Manual

Epson Stylus Photo R280/R285/R290/Epson Artisan 50/Epson Stylus Photo T50/T59/T60/P50

2.1 Overview

This chapter describes the operating principles of the printer mechanism and electric
circuit boards of Stylus Photo R280/R285/R290 and Epson Artisan 50/Epson Stylus
Photo T50/T59/T60/P50.

2.1.1 Printer Mechanism

The main components of the printer mechanism are shown in the table below.
Table 2-1. Printer Mechanism Main Components
Component
Moves along the CR shaft to print on paper being powered by the CR motor.
CR Unit
The unit includes Printhead, PW sensor, and CR encoder sensor.
Moves the carriage upward/downward to adjust the platen gap being powered by
the PF motor. There are 4 preset levels of platen gap and the unit moves the
APG Unit
carriage to one of the levels according to the current carriage position detected by
the APG sensor.
PF Unit Rotates the PF roller shaft to feed paper being powered by the PF motor.
Being powered by the PF motor, feeds paper loaded on the ASF into the printer
ASF Unit
mechanism.
Being powered by the PF motor, ejects paper or the CDR tray.
EJ Unit
The EJ frame moves corresponding to the stacker position so that the frame
matches with the paper size.
Located on the right side of the printer mechanism. Covers the printhead with the
Ink System cap holder when the printhead is not used, and draws waste ink out of the
printhead. The waste ink is sent to the Waste Ink Tray through the waste ink tube.
The main control boards are shown in the table below.
Table 2-2. Main Control Boards
Board
Located on top of the printer mechanism and controls all over the
Main Board
printer operations.
Power Supply Board Located on the Lower Housing and generates required voltages for the
(P/S ASSY) printer using the power supplied from the AC power line.
Panel Board Located inside the Panel Unit and controls the operation panel.
Chapter 2 Operating Principles
Function
Function
Cover Open Cover Open
Sensor Sensor
CDR Tray
Sensor
PW Sensor
Printhead
CR Unit
EJ Frame
EJ Roller Shaft
CR Shaft
CDR Guide
Sensor
CR Lock Lever
Cap ASSY
Ink System
APG Unit
Figure 2-1. Printer Mechanism Diagram
2.1 Overview
PF Encoder Sensor APG Sensor
Revision C
PF Motor
PF Roller Shaft
CR Encoder
Sensor
LD Roller
PE Sensor
ASF Unit
CR Motor
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