Epson B81306 series Manuale utente

TRANSPARENCY UNIT

B81306*

FOR EPSON IMAGE SCANNER

SERVICE MANUAL

EPSON

NOTICE

SEIKO EPSON’s express written permission is forbidden.

The

contents

of this manual are subjects to change without notice.

Alleffortshavebeen made to ensure the accuracy of the contents of this manual. However, should

any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The

above notwithstanding SEIKO

EPSON can assume no responsibility for any errors in this

manual or the consequence

thereof.

Epson is registered trademark of Seiko Epson Corporation.

General Notice:

Otherproductnames

used herein are

foridentication

purposes only and maybe

trademarks of their respective

campanies.

1994

by SEIKO EPSON CORPORATION Nagano, Japan

.,’

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)

damage to equipment.

DANGER

Signals a precaution which, if ignored, could result in serious or fatal personal injury.

Great caution should be exercised in perfo

rming

procedures preceded by DANGER

Headings.

WARNING

Signals a precaution which, if ignored, could result in damage to equipment.

The precautionary measures itemized below should always be observed when performin

g repair/

maintenance procedures.

DANGER

ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND

PEIUPHERALDEVICES

PERFORMING ANY

MAINTENANCE OR REPAIR PROCEDURE.

NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH

BASIC SAFETY

MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN

THEIR LINE OF WORK.

WHEN PERFORMING TESTING AS DICTATED

WITHIN 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 E

XTREME

CAUTION IN

WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

WARNING

REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON

CER-

REPAIR TECHNICIAN.

MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT-

AGE, LISTED ON

T’HE

SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT

HAS A P

RIMARY

AC RATING DIFFERENT FROM 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 PRINTED CIRCUIT

BOARDS AND/OR INDIVIDUAL CHIPS.

IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE

STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN

ACCESSING INTERNAL COMPONENTS.

REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY

THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE

ICSOROTHER

NONAP-

PROVED COMPONENTS

MAY

DAMAGE THE PRODUCT AND VOID ANY APPLICA-

BLE EPSON WARRANTY.

-ii-

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair

of B813061/B813062 Transparency Unit.

The instructions and procedures included herein are intended for the experience repair technician, and

attention should be given totheprecautions ontheprecedingpage. The chapters areorganized as follows:

CHAPTER 1. PRODUCT DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of the printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of transparency unit operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENTS

This transparency unit is not needed any adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides Epson-approved techniques for service.

CHAPTER 6. MAINTENANCE

Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.

APPENDIX

Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.

The contents of this manual are subject to change without notice.

-iv-

REVISION SHEET

Revision Issue Date Revision Page

Rev.

November 28,1994 Ist issue

,,.

,. ,;

-v-

TABLE OF CONTENTS

CHAPTER 1. PRODUCT DESCRIPTION

CHAPTER 2.

OPERATING PRINCIPLES

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

CHAPTER 4.

ADJUSTMENTS

CHAPTER 5.

TROUBLESHOOTING

CHAPTER 6. MAINTENANCE

APPENDIX

-vi-

CHAPTER 1

Product Description

Table of Contents

1.1

FEATURES

1-1

1.2 SPECIFICATIONS

1-1

1.3 MAIN COMPONENTS

1-1

Figure 1-1.

List of Figures

Exterior View of the Transparency. . . . . . . . . . . . . . . . . . . . . .. ....1-1

B81306* Service Manual Product Description

1.1 FEATURES

This transparency unit is a high-quality device developed to enable EPSON Scanner owners to scan

wide

size(up

to A4 or Letter size) transparency, slides and films in color or monochrome.

Figure 1-1. Exterior View of the transparency unit

1.2

SPECIFICATIONS

arming method

Color separation

Sub-scanning resolution

Light Source

ocument type

arming

size

Environment conditions

Power consumption

Reliability

Dimensions

: Light source movement

: By light Source (green,red,blue)

Max.800PDI

: Noble gas cold cathord-ray tube

: Transparency documents (including slide film) in color or

monochrome

to 216mm X 297mm (8.5” X 11.7”)

Temperature Operating 5 to 35 degrees C(41 to95 degrees F)

Storage

-20 to 60 degrees C(-4 to 140 degrees

Humidity Operating

10t080%nocondensation

Storage

10 to 85

!4.

+24V

Max.500mA

+5V

Max.100mA

: MCBF 100,000 cycles

: 324mm X

540mm

x84mm

1.3

MAIN COMPONENTS

The main components are;

Mechanism Unit

BOARD

ASSY.,

MAIN: Control board

Invertor Circuit

Housing

Rev.A

1-1

CHAPTER 2 Operating Principles

Table of Contents

2.1 TRANSPARENCY MECHANISM OPERATION

2-1

2.1.1 Carriage Movement Mechanism. . . . . . . . . . . . . . . . . . . . . . . . .........2-1

2.2 CONTROL CIRCUIT 2-2

2.2.1 Circuit Operation Overview. . . . . . . . . . . . . . . . . . . . . . ...............2-2

List of Figures

Figure 2-1. The Carriage Movement Mechanism. . . . . . . . . . . . . . . . . . . . . .. ..2-1

Figure 2-2. Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . ...............2-2

B81306*

SeMce

“

Manual

Operating

Principle

2.1

TRANSPARENCY MECHANISM OPERATION

This

section describe the transparency mechanism and explains it works.

2.1.1 Carriage Movement Mechanism

The

transp

arency method is the carriage of light source movement method. The carriage

movement mechanism consists of lamp carriage assembly, carriage motor assembly, gear/lead

screw, roller and carnage home position sensor. Figure 2-1 shows the carriage movement

mechanism.

The carriage motor assembly drives the gear/lead screw. The

mrriagemot

or=sembly~

mounted

on the

lamp carriage assembly. The lead screw is

connected to

the

housing. When the carriage

motor turns the gear, the carriage move the forward or backward in the housing smoothly via lead

screw. The

carriage movement synchronizes with the scanner head movement.

The carriage home position

sensor informs the CPU of scanner the carriage home position. The

sensor is photo-coupler type. The striker on the carriage active the sensor to indicate the carriage

home position.

Carriage Home Position Sensor

Combination Gear

-.,

Carriage

‘Roller

Figure 2-1. The Carriage Movement Mechanism

Assembly

Rev.A

2-1

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