EPSON Perfection 1250 Diagram
®
Service Manual
Color Image Scanner
EPSON Perfection 1250/1250 PHOTO
TM-PERF1250
Printed in U.S.A.
EPSON
Perfection 1250/1250 PHOTO Color Flatbed Scanner
Service Manual
EPSON Perfection 1250/1250 PHOTO
Copyright Notice
2001 Epson America, Inc.
3480 Kilroy Airport Way, Long Beach CA, 90806-2469
All rights reserved. No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in any form or by any means,
electronic, mechanical, photocopying, recording, or otherwise, without
the written permission of Epson America, Inc.
Epson America, Inc., assumes no liability for damages resulting from
the use of the information contained herein. While every precaution has
been taken in the preparation of this book, Epson America, Inc.
assumes no responsibility for errors and omissions.
Neither Epson America, Inc., nor its affiliates shall be liable to the
purchaser of this product or third parties for damages, losses, costs, or
expenses incurred by the purchaser or third parties as a result of:
accident, misuse, or abuse of this product or unauthorized
modifications, repairs, or alterations to this product.
Epson America, Inc. shall not be liable for any damages or problems
arising from the use of any options or any consumable products other
than those designated as Original EPSON-Approved Products by Seiko
Epson Corporation.
Trademark Information
EPSON® and ESC/P® are registered trademarks of Seiko Epson.
Epson Connection
General Notice: Other product names used herein are for identification
purposes only and may be trademarks of their respective companies.
EPSON disclaims any and all rights in those marks.
is a service mark of Epson America, Inc.
SM
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EPSON Perfection 1250/1250 PHOTO
FCC Compliance Statement for American Users
This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio and television reception.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause interference to radio
and television reception, which can be determined by turning the
equipment on and off, the user is encouraged to try to correct the
interface by one or more of the following measures:
! Reorient or relocate the receiving antenna.
! Increase the separation between the equipment and receiver.
! Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
! Consult the dealer or an experienced radio/television technician
for help.
Warning
The connection of a non-shielded equipment interface cable to this
equipment will invalidate the FCC Certification of this device and may
cause interference levels that exceed the limits established by the FCC
for this equipment. It is the responsibility of the user to obtain and use a
shielded equipment interface cable with this device. If this equipment
has more than one interface connector, do not leave cables connected
to unused interfaces.
Changes or modifications not expressly approved by the manufacturer
could void the user’s authority to operate the printer.
For Canadian Users
This Class B digital apparatus meets all requirements of the Canadian
Interface-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du
Règlement sur le materiel brouilleur du Canada.
5
EPSON Perfection 1250/1250 PHOTO
Guide to Using This Manual
Symbols Used in This Manual
Before servicing the EPSON Perfection 1250/1250 PHOTO, read the
precautions on the following page. Then turn to one of these chapters:
Chapter 1. Product Basics
Lists the main features of the product and describes basic
control panel operations.
Chapter 2. Technical Overview
Explains how the product works.
Chapter 3. Troubleshooting
Tells how to identify and correct common problems.
Chapter 4. Disassembly and Assembly
Provides step-by-step instructions for disassembling the
product.
Chapter 5. Maintenance
Describes routine maintenance procedures.
Chapter 6. Appendix
Provides additional information for reference:
" Detailed specifications
DANGER
C A U T I O N
R E A S S E M B L Y
TIP
Warnings
or death.
Cautions
scanner.
Reassembly
reassembly.
TIP
must be followed to avoid personal injury
must be followed to avoid damaging the
notes provide helpful information for
notes provide helpful tips for reassembly.
" Connector diagram and pin assignments
" Electrical diagrams
" Parts list
" Exploded diagrams
6
EPSON Perfection 1250/1250 PHOTO
General Precautions
DANGER
" When servicing, unplug the scanner from the
power outlet and disconnect any attached devices.
" Never touch the primary parts of the power supply
when the scanner is plugged in. The scanner’s
primary circuitry remains live whenever it is
plugged in.
" No work should be performed on the unit by
persons unfamiliar with basic safety measures
familiar to trained electronics technicians.
" When performing testing or troubleshooting
procedures in this manual, do not connect the unit
to a power source until instructed to do so. When
the power supply cable must be connected, use
extreme caution in working on the power supply
board and other electronic components.
C A U T I O N
" Repairs on EPSON products should be performed
only by an EPSON-certified repair technician.
" Make certain that the source voltage is the same
as the rated voltage listed on the serial number/
rating plate. If the EPSON product has a primary
AC rating different from the available power
source, do not connect it to the power source.
" Always verify that the EPSON product has been
disconnected from the power source before
removing or replacing circuit boards and other
components.
" To protect sensitive microprocessors and
circuitry, use static discharge equipment, such as
anti-static wrist straps, when accessing internal
components.
" Always replace malfunctioning components with
EPSON components. Introduction of secondsource ICs or other non-approved components
may damage the product and void any applicable
EPSON warranty.
7
EPSON Perfection 1250/1250 PHOTO
8
EPSON Perfection 1250/1250 PHOTO
Contents
Chapter 1 Product Basics
Features ...................................................................................................... 13
Control Panel ............................................................................................... 13
Chapter 2 Technical Overview
Basic Operation ........................................................................................... 17
Carriage Assembly ................................................................................. 17
Carriage Mechanism .............................................................................. 18
Control Circuit Overview .............................................................................. 19
Chapter 3 Troubleshooting
Overview ...................................................................................................... 23
Error Processing .......................................................................................... 23
Scanner Self-Diagnostics ............................................................................ 24
Unit-Level Troubleshooting .......................................................................... 24
Chapter 4 Disassembly & Assembly
Overview ...................................................................................................... 29
Required Tools ....................................................................................... 29
Screws .................................................................................................... 30
Disassembly Procedures ............................................................................. 30
Carriage Lock Release ........................................................................... 30
Document Cover .................................................................................... 31
Upper Cover Removal ............................................................................ 31
Carriage Assembly Removal .................................................................. 32
Motor CR/Timing Belt Removal .............................................................. 34
Main Circuit Board Removal ................................................................... 35
Control Panel Board Removal ................................................................ 36
Chapter 5 Maintenance
Overview ..................................................................................................... 41
Lubrication .............................................................................................. 41
Chapter 6 Appendix
Specifications .............................................................................................. 45
Basic specifications ................................................................................ 45
Basic TPU specifications ........................................................................ 46
Electrical specifications .......................................................................... 46
Resistance to electrical noise ................................................................. 47
Operating environment ........................................................................... 47
Reliability ................................................................................................ 47
Documents ............................................................................................. 47
Interface Specifications ............................................................................... 48
USB Interface ......................................................................................... 48
Control Codes ............................................................................................. 49
Scanner Connection Diagram ................................................................ 49
Connector Summary .............................................................................. 50
Connector Pin Assignments ................................................................... 50
Circuit Diagram ............................................................................................ 52
Parts List and Exploded Diagrams .............................................................. 55
9
EPSON Perfection 1250/1250 PHOTO
10
PRODUCT BASICS
CHAPTER
1
EPSON Perfection 1250/1250 PHOTO Product Basics
1.1 Features
There are two EPSON Perfection 1250 models: the 1250 and the 1250
PHOTO. The Perfection 1250 PHOTO ships with a TPU (transparency unit) as
a standard feature. Both models are flat-bed color image scanners capable of
scanning up to A4 size documents (maximum scan area: 8.5
The scanner’s features include:
High resolution
!
Optical resolution up to 1200 dpi
(1200 dpi in the main scan direction, 2400 dpi in the sub-scan direction)
!
Maximum effective pixels:
10,200
!
Output resolution:
50 to 4800 dpi
×
14,040
Compact and lightweight
!
The world's thinnest 1200 dpi CCD scanner.
High-speed scanning
!
At 1200 dpi, the scanner performs at the following speeds:
Table 1-1. Scan Speed
×
11.7 inch).
1.2 Control Panel
The control panel includes four buttons, as shown below:
Photo Print button
Start button
Figure 1-1. Control Panel buttons
Buttons
The four buttons (Start, Photo Print, Scan to E-mail, Scan to Web) on the
control panel can be used in conjunction with the scanner software to make
scanning very easy.
!
Start
Starts EPSON Smart Panel (button function can be reassigned).
Scan to E-mail button
Scan to Web button
Monochrome (B&W) Approx. 12 msec per line
256 Grayscale Approx. 36 msec per line
Full Color Approx. 36 msec per line
Command level
!
ESC/I-D2
Setting Speed
!
Photo Print
Starts Photo Print, scans and prints the document.
!
Scan to E-mail
The document is scanned in Full Auto mode and the image file is
automatically attached to an e-mail message.
!
Scan to Web
Sends the image to the EPSON Photo Sharing web site.
13
EPSON Perfection 1250/1250 PHOTO Product Basics
Indicator Lights
!
Ready (green)
Lit when the scanner is ready to receive commands. Flashes when data is
sent to or from the host computer.
!
Error (red)
Lit when an error occurs.
14
TECHNICAL OVERVIEW
CHAPTER
2
EPSON Perfection 1250/1250 PHOTO Technical Overview
#
2.1 Basic Operation
This chapter describes the basic operation of the Perfection 1250/1250
PHOTO engine.
Mirror and lens mechanism
The light that illuminates the document being scanned is reflected to the
mirror and lens mechanism inside the carriage unit. The CCD sensor
separates R, G and B components.
2.1.1 Carriage Assembly
The carriage assembly consists of a CCD sensor circuit board, an inverter
circuit board, a lamp (light source), and a mirror and lens mechanism.
Lamp
CCD sensor circuit board
Figure 2-1. Carriage Assembly Structure
Front
Rear
Inverter circuit board
CCD sensor
Front
Scanning
direction
Mirror 1
CCD sensor
CCD
Rear
Document
Lamp
Lens
Figure 2-2. Mirror and Lens Mechanism
Mirror 3
Mirror 4
Mirror 2
#
CCD sensor circuit board
This board consists of color CCD line sensors (independent R, G and B)
and circuits for controlling them.
#
Inverter circuit board
This board boosts the power supply voltage to +24 V DC and converts it
from direct current to alternating current in order to drive the lamp (coldcathode fluorescent lamp).
#
Lamp
A cold-cathode fluorescent lamp is used as the light source.
17
EPSON Perfection 1250/1250 PHOTO Technical Overview
2.1.2 Carriage Mechanism
To generate an image, the document is scanned in the main scanning direction
(single line scan) by the CCD sensor, and then in the sub-scanning direction
(multiple line scan) by the carriage assembly as shown in Figure 2-3.
The color CCD sensor can only scan a single line in the main scanning
direction (which runs parallel to the carriage assembly direction). In order to
scan the second and subsequent lines in the sub-scanning direction, the CCD
sensor is moved by the carriage unit. Scanned data is then sent to the control
circuit board. When line
processed at the same time, so that scanning is continuously carried out.
1 pixel
Main scanning
direction
n
is being scanned, the image data for line
Document
Sub-scanning direction
(from carriage movement)
2nd line
1st line
Scanner head
n-1
is
(carriage)
Front
Timing belt
Driven Pulley
Rear
Drive Pulley
CR HP sensor
Carriage Assembly
Figure 2-4. Carriage Operation
CR Motor
Figure 2-3. Carriage Movement
The carriage assembly slides along the guide rail in the sub-scanning direction.
This movement is powered by the CR motor via the drive pulley to the timing
belt which is secured to the carriage unit. The scanning starting position is
determined by the CR HP sensor, which is located on the control circuit board.
18
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