Epson GT-9000 User manual

EPSON
EPSON
EPSON France S.A.
SERVICE MANUAL
GT-9000
PRODUIT

EPSON GT-9600
Color Imaging Scanner
SESC98003
®
6(59,&(0$18$/

Notice
All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic,
mechanical, photocopying, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.
All effort have been 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 contents of this manual are subject to change without notice.
All effort have been 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 not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences
thereof.
EPSON is a registered trademark of SEIKO EPSON CORPORATION.
General Notice: Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their
respective owners. EPSON disclaims any and all rights in those marks.
Copyright © 1998 SEIKO EPSON CORPORATION. Printed in 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
performing 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 performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY
MAINTENANCE OR REPAIR PROCEDURES.
2. 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.
3. 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 EXTREME CAUTION IN WORKING ON
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGES 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 AVAILABLE POWER SOURCE, DO NOT
CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR
REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS
ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF
SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE
EPSON WARRANTY.

About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of GT-9600. The
instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on
the preceding page.
Contents
This manual consists of six chapters and Appendix.
CHAPTER 1. PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the
product.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of electrical and mechanical
operations of the product.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
Provides the step-by-step procedures for
disassembling and assembling the product.
CHAPTER 4. TROUBLESHOOTING
Describes the step-by-step procedures for
the troubleshooting.
CHAPTER 5. ADJUSTMENTS
Provides Epson-approved methods for adjustment.
CHAPTER 6. MAINTENANCE
Provides preventive maintenance procedures and the
lists of Epson-approved lubricants and adhesives
required for servicing the product.
APPENDIX Provides the following additional information for
reference:
• Connector pin assignments
• Electric circuit boards components layout
• Exploded diagram
• Electrical circuit boards schematics
Symbols Used in This Manual
Various symbols are used throughout this manual either to provide
additional information on a specific topic or to warn of possible danger
present during a procedure or an action. Be aware of all symbols when
they are used, and always read WARNING, CAUTION or NOTE
messages.
Indicates an operating or maintenance procedure, practice
or condition that, if not strictly observed, could result in injury
or loss of life.
Indicates an operating or maintenance procedure, practice,
or condition that, if not strictly observed, could result in
damage to, or destruction of, equipment.
May indicate an operating or maintenance procedure,
practice or condition that is necessary to accomplish a task
efficiently. It may also provide additional information that is
related to a specific subject, or comment on the results
achieved through a previous action.
CAUTION
CHECK
PO IN T

Revision Status
Revision Issued Date Description
Rev. A December 2, 1998 First Release

EPSON GT-9600 Revision A
1
Table of Contents
Product Description
Overview......................................................................................................... 3
Features.................................................................................................... 3
Specifications ................................................................................................. 3
General Specifications .............................................................................. 3
Electrical Specification .............................................................................. 4
Safety, EMC.............................................................................................. 4
Resistance to electric noise....................................................................... 5
Environmental Conditions ......................................................................... 5
Reliability................................................................................................... 5
Operating Conditions................................................................................. 5
Document.................................................................................................. 5
Physical Dimension................................................................................... 5
Interface.......................................................................................................... 6
SCSI.......................................................................................................... 6
Switch and Lamps.......................................................................................... 8
Switch........................................................................................................ 8
Error .......................................................................................................... 9
Cause and Remedy when errors happen....................................................... 9
Command Specification.................................................................................. 9
Control Code .................................................................................................. 9
Control Code............................................................................................. 9
Function of Control Codes......................................................................... 9
Resolution Setting .......................................................................................... 9
Download color correction.............................................................................. 9
Set Threshold................................................................................................. 9
Set Film Type ................................................................................................. 9
Main Components ........................................................................................ 10
B077 Main Board..................................................................................... 10
B077 ISN Board ...................................................................................... 10
Operating Principles
Control Circuit............................................................................................... 12
Overview of Control Circuit...................................................................... 12
Disassembly and Assembly
Disassembly and Assembly ......................................................................... 14
Bottom Plate Removal ............................................................................ 14
B035 Power Supply Board Removal....................................................... 14
B077 MAIN Board Removal.................................................................... 15
CR Motor Removal.................................................................................. 16
Lamp Assembly Removal ....................................................................... 17
Adjustment
Adjustment ................................................................................................... 20
Troubleshooting
Maintenance
Appendix
Scanner Connection..................................................................................... 26
Connector..................................................................................................... 26
Board Component Layout ............................................................................ 28
Exploded Diagram........................................................................................ 29
Circuit Shematics ......................................................................................... 33

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PRODUCT DESCRIPTION

EPSON GT-9600 Revision A
Product Description Overview 3
1.1 Overview
This scanner is a revised model of GT-9500 and high-resolution color
image scanner for the various use from the designer to the office user.
Main features of this scanner are as follow.
1.1.1 Features
High Quality: 800 dpi, 12bit-in, 12bit-out
OD Value MAX 3.3
High Speed: Exposure Time 7.5msec/line at 800dpi
Scanning Time 75 Sec/A4, Full color
Command Level: ESC/I-B8
I/F: SCSI
Table 1-1. Optional Items
NOTE:* The number represented by an asterisk varies, depending
on the country.
Figure 1-1. Exterior View of GT-9600
1.2 Specifications
1.2.1 General Specifications
Product Type* Flatbed color image scanner
Sub-scanning device: Movement of the Scanning Head
Photoelectric device: Color CCD Line Sensor
Maximum Read Area: 8.5 x 11.7 (216 x 297 mm)
Maximum Effective Picture Element:6800 x 9360 pixels(800dpi)
Scanning Resolution: Main 800 dpi optical
Sub Max.3200 dpi with microstep
Output Resolution: 50 ∼ 6400 dpi (1 dpi step)
No. Name
B81316* ADF(Auto Document Feeder)
B81315* TPU (Transparency Uni)

EPSON GT-9600 Revision A
Product Description Specifications 4
Scanning Speed(600 dpi, Draft Mode):
Color 7.5 msec/line
Monochrome(bi-level) 7.5 msec/line
Color Separation: By the color filter of CCD
Command Level: ESC/I-B8
Zoom: 50% to 200% (1% step)
Pixel depth: 1-12 bits/pixel (Input 12 bits/pixel)
Gamma Correction: CRT 2 level (A, B)
PRINTER 3 level (A, B, C)
User defined 1 level
Color Correction: Impact-Dot Printer
Thermal Printer
Ink-Jet Printer
CRT Display
Brightness: User defined
Line Art: 7 Level
Fixed threshold
Digital half-toning: TET
AAS
Bi-level, Quad-level: Error Diffusion 3 mode (A,B,C)
Dither(Resident) 4 mode(A, B, C, D)
Dither(User defined) 2 mode (A, B)
Interface(Resident): SCSI(50-pin Half pitch Connectors)
Light Source: White Cold cathode Fluorescent Lamp
Option: TPU, ADF
1.2.2 Electrical Specification
Rated Voltage: AC100-120V/220V-240V
Input Voltage: AC100 -120V ±10%
AC220 -240V ±10%
Rated Current: 0.8A(Input AC 100V)
0.4A(Input AC 220V)
Rated Frequency Range:50-60 Hz
Input Frequency Range: 49.5-60.5 Hz
Power consumption: Approx.40W
Insulation Resistance: 10M Ohms at 500 VDC(between AC line
and chassis)
Dielectric strength: AC 1.5kV, 1 min
(between AC Line and chassis)
1.2.3 Safety, EMC
Safety: UL1950 (UL)
CSA C22.2 NO.950 (CSA)
EN60950 (VDE)
EN60950 + Nordic deviation(NEMKO)
EMC: FCC Part 15 Subpart B Class B
CSA C108.8 Class B
AS/NZS3548 Class B
CISPR Pub22 Class B
CNS13438 Class B
CE Marking:
Low Voltage Directive 73/23/EEC EN60950

EPSON GT-9600 Revision A
Product Description Specifications 5
EMC Directive 89/336/EEC EN55022 Class B
EN61000-3-2
EN61000-3-3
EN 50082-1
EC 801-2/801-3/801-4
1.2.4 Resistance to electric noise
Static electricity: Panel - 10kv
Metal-7kV /150pF, 150 Ohms
1.2.5 Environmental Conditions
Temperature Operating: 5 °C to 35 °C
Storage: -25 °C to 60 °C
Humidity Operating: 10 to 80%, no condensation
Storage: 10 to 85%, no condensation
1.2.6 Reliability
Main unit MCBF 100000 cycle
1.2.7 Operating Conditions
Dust Ordinary office or home conditions.
Extreme dust should be avoided.
Illumination Operation under direct sunlight or near strong
light source is not guaranteed and should be
avoided.
1.2.8 Document
Reflective type: Documents which has a smooth surface
Transparency type: (With transparency unit)
Reversal film
Negative film
1.2.9 Physical Dimension
Dimension 332(W) x 562(D) x 134(H) mm
Weight Approximately 8.5Kg
UNLOCK LO C K
ON
OFF
OPTION TE R M INA TO R
SW
SCSI
ID
RESET OPERATE
ERROR READY OPERATE
332 m m 134 m m
562
mm

EPSON GT-9600 Revision A
Product Description Interface 6
1.3 Interface
This section explains interface ofthis scanner. This scanner is equipped
with SCSI as standard interface. Refer to Service Manual of GT-9500
for pin alignment.
1.3.1 SCSI
Any items not included in this specification shall be in compliance with
ANSI X3. 131-1994 (SCSI 2).
Function: The following functions are available, which are included
in ANSI X3. 131-1994 (SCSI 2).
1. Bus free phase
2. Arbitration phase
3. Selection/Re-selection phase
4. Command phase
Note) The LUN(Logical Unit Number) is fixed at “0” in this device.
The command Link Function is not supported.
5. Data phase
Data in phase
Data out phase
6. Status phase
7. Message phase
Message in phase
Message out in phase
8. Attention condition
9. Reset condition
SCAM(SCSI Configured Auto Matically specification) [ANSI T10/1142
rev.15]
Electric Specification
Compliant to ANSI X3. 131-1994 (SCSI 2)
Single ended
Connector
Two 50-pin connectors (Half Pitch)
Terminator
Internal terminator
Enable to control “active” or “inactive” by a switch. (SW=ON ---
Terminator available)
SCSI ID
The SCSI ID is set with a rotary switch on the rear panel.
The switch numbers are corresponded to the available address and
can be set from 0 to 7. Factory setting ID=2.
Command
This device use the following group “0” processor commands.
Table 1-2. Command List
NOTE: *1 Only the extension sense data format is supported for
sense data returned by the Request Sense Command.
*2 The Inquiry data is as follows. (see the next page)
Command Code Description
Test Unit Ready 00h Confirm for operation
Request Sense 03h Require a Sense data*1
Receive 08h Data transmission from Target to Initiator
Send 0Ah Data Transmission from Initiator to Target
Inquiry 12h Require information of SCSI devise*2
Send Diagnostic 1Dh Send diagnostic

EPSON GT-9600 Revision A
Product Description Interface 7
byte data
0 03h Peripheral devise type: : 3(Processor)
1 00h RMB : : 0
device Type restriction: : 0
2 02h ISO Version : : 0
ECMA Version : : 0
ANSI Version : : 2
3 02h AENC : : 0
TrmI0P : : 0
Response data format: : 2
4 23h
5 00h
6 00h
7 00h
Vender unique parameter byte:
’EPSON’, 20h, 20h, 20h
’SCANNER’, 20h, ’xxxxxxxx’, 20h, ’****’,
00h, 00h, 00h, FFh]
Note: ’****’ ROM version
Status: All bits are defined as follows.
Table 1-3. Status
NOTE:R: means reserved bit.
Table 1-4. Message
NOTE: Out: Target → Initiator
In: Initiator
→ Target
Status Bits
Status 7 6 5 4 3 2 1 0
Good RR00000R
Check
Condition R R 0 0 0 0 1 R
Busy RR00100R
Message Code Direction Completion of ATN
Command Complete 00h In --
Extended Messages 01h In/Out --
Save Data Pointer 02h In --
Restore Pointer 03h In --
Disconnect 04h In --
Initiator Detect Error 05h Out Yes
Abort 06h Out Yes
Message Reject 07h In/Out Yes(Out)
No Operation 08h Out Yes
Message Parity Error 09h Out Yes
Bus Device Reset 0Ch Out Yes
Identify 80h-FFh In/Out No(Out)

EPSON GT-9600 Revision A
Product Description Switch and Lamps 8
Table 1-5. Extended Message
NOTE: Out: Target → Initiator
In: Initiator
→ Target
1.4 Switch and Lamps
Since the basic components of this scanner is same as the GT-9500,
only changed parts are explained here.
Figure 1-2. Switch and LED Lamps
1.4.1 Switch
SCSI ID rotary switch:
0-7: SCSI-ID (factory setting 2)
*: The carriage moves to carriage lock position when power is turned
on.
Other:Reserved
Extended
Message
Code
Message
length
(Byte) Message Direction Completion
of ATN
01H 5 Synchronous
Data Transfer
Request In/Out Yes(out)
03H 4 Write Data
Transfer
Request In/Out Yes(out) UNLOCK LO C K
ON
OFF
OPTION TERM IN ATO R
SW
SCSI
ID RESET O PERATE
ERRO R R EADY O PERATE
READY LED ERRO R LED OPERATE LED
B ack Front
RESET Switch
OPERATE Switc
h
SCSIID Switch
SCSIID
Term inatorS etting
Switch

EPSON GT-9600 Revision A
Product Description Command Specification 9
1.4.2 Error
1.4.2.1 Cause and Remedy when errors happen
Fatal Errors
[Remedy]
Remove the causes and turn back on the power.
Send ESC @ code.
Send Bus Device Reset Message of SCSI.
Assert RST signal of SCSI.
1.5 Command Specification
Refer to the Service Manual of GT-9500.
1.6 Control Code
Since the basic components of this scanner is same as the GT-9500,
only newly added or changed codes are listed here.
1.6.1 Control Code
Table 1-6. Newly Added Codes
1.6.2 Function of Control Codes
1.6.2.1 Resolution Setting
By this command, the resolution can be set from 50 dpi to 400dpi.
1.6.2.2 Download color correction
By this command, color correction can be set.
1.6.2.3 Set Threshold
Controls the threshold values
1.6.2.4 Set Film Type
Sets the color balance when reading the target by using TPU.
Classification Function Code
Image Processing Download color correction ESC m d1...d9
Set Threshold ESC t i
Support, other Set Film Type ESC N i

EPSON GT-9600 Revision A
Product Description Main Components 10
1.7 Main Components
B077 Main Board:Main Control Board
B077 ISN Board: Sensor Circuit Board
B035 PSB Board: Power Supply Board
Scanner Head (Carriage Assembly)
Carriage Mechanism
Housing
Document Cover
Since the basic components of this scanner is same as the GT-9500,
only changed parts are explained here.
1.7.1 B077 Main Board
The main control circuit, B077 Main Board controls various parts by 16-
bit CPU M8S/2350 Clock Frequency 20 MHz. Also, gate array and
memory for image processing and motor drive circuit for moving the
scanner head are also mounted on this board.
1.7.2 B077 ISN Board
This board converts the signal(Analog signal) read by Color CCD
sensor into the digital and sends it to the Main Board.

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OPERATING PRINCIPLES

EPSON GT-9600 Revision A
Operating Principles Control Circuit 12
2.1 Control Circuit
Since the basic component of GT-9600 is same as GT-9500, only
particular items exclusively for GT-9600 are explained here.
2.1.1 Overview of Control Circuit
B077 Main Control Circuit in this scanner uses “16-bit one chip CPU
H8S/2350” as CPU by clock frequency 20Mhz.
Figure 2-1. Block Diagram of Control Circuit
Table 2-1. Functions of Major Elements
SCSI
Controller
M 64154FP
(IC 2 1 )
M otorC ontroller
A3956S LB X 2
(IC 26,27)
SCSI
CPU
H 8S/2350
(IC 5 )
In v e rto r fo r
lightsource
B077IS N Board
(C olorC C D ,A m p.,A/D C onvertor)
H P S ensor
LightSource
Control CCD Control Im age D ata
1M bit
PRO M
(IC 6 )
CR Motor
Option
C onnector
GateArray
MERCURY
(IC 12)
Bus Line
1M bit
SRAM
(IC 15,16,
19,20,22,23)
1M bit
DRAM
(IC 8,18)
256Kbit
SRAM
(IC 7 )
Elements Location Function
H8S/2350 CPU IC5
This CPU controls this scanner
and is driven by clock frequency
20 MHz. Also, CPU control light
source and timing for motor
drive.EEPROMandEPROMare
connected to CPU.
MERCURY GA IC12
This gate array has following
functions.
• Shading Correction
• Gamma Correction
• CCD Sensor Control
• A/D Convertor Control
• Color Correction
•Zoom
• Set Digital Half -Toning
• AAS (Auto area
segmentation)
• CPU Support
Memory Control
Light quantity Control
• Generates Power On, Reset
signals
• Generates Clock signal
Six 1Mbit SRAM and two
128Mbit DRAM are connected to
this gate array.
A64154FP IC6 SCSI Controller
A3956SLB IC26, 27 Carriage Motor Driver

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DISASSEMBLYANDASSEMBLY

EPSON GT-9600 Revision A
Disassembly and Assembly Disassembly and Assembly 14
3.1 Disassembly and Assembly
This section explains disassembly procedure of GT-9600. Since the
components of GT-9500 and GT-9600 are basically same, items only
for GT-9600 are explained here.
3.1.1 Bottom Plate Removal
1. Remove 17 screws(CBB, 3x12) and 2 screws(CBS, 3x6) securing
“Bottom Plate” to “Housing, Lower”.
2. Remove “Bottom Plate” from “Housing, Lower”.
Figure 3-1. Bottom Plate Removal
3.1.2 B035 Power Supply Board Removal
1. Remove “Bottom Plate”. (See “Bottom Plate Removal” on page -14)
2. Disconnect harness from the connectors on the B035 power supply
board.
3. Remove 5 screws (CBB, 3x12) securing B035 power supply board
to “Housing, Lower”.
4. Remove B035 power supply board from “Housing, Lower”.
Figure 3-2. B035 Power Supply Board Removal
CBB (3x12)
CBB(3x12)
CBS
(3x6)
Housing Lower Harness to the
LED Board
Harness to
B077Main Board
CBB(3x12) Power Supply
Cable