Epson GT-10000 Service manual
®
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUALSERVICE MANUAL
Color Flat Bed Scanner
EPSON GT-10000
SESC99005
Notice:
n
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, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.
n
The contents of this manual are subject to change without notice.
n
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.
n
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 © 1999 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
WARNING
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
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.
Signals a precaution which, if ignored, could result in damage to equipment.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE
OR REPAIR PROCEDURES.
2. NOWORK 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.
PREFACE
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of GT-10000. 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. The chapters are organized as follows:
CHAPTER 1. PRODUCT OUTLINE
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. TROUBLESHOOTING
Provides the step-by-step procedures for troubleshooting.
CHAPTER 4. DISASSEMBLY & ASSEMBLY
Describes the step-by-step procedures for disassembling and assembling the
product.
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.
CHAPTER 7. APPENDIX
Provides the following additional information for reference:
• Connector Pin Assignment
• Circuit Board Component Layout
• Circuit Board Diagram
• Exploded Diagrams & ASP List
Revision Status
Revision Issued Date Description
A June 14, 1999 First Release
EPSON GT-10000 Revision A
Table of Contents
CHAPTER 1 PRODUCT OUTLINE
Overview ........................................................................................................ 9
Specifications .............................................................................................. 10
Basics ..................................................................................................... 10
Image Handling Specifications .......... ..................................................... 10
Electrical Specifications .................................................... ...................... 11
Safety, EMC, EPA .................................................................................. 11
Resistance to Electric Noi se ................................................................... 11
Environmental Specifications ................................................................. 11
Reliability ................................................................................................ 11
Operating Conditions .............................................................................. 11
Original Document Condition ................................................................. 12
Physical Dimensions and Weight ........................................................... 12
Interface Specifications ............................................................................... 13
SCSI Interface ........................................................................................ 13
Basic Specifications ........................................................................... 13
Functions ............................................................................................ 13
SCSI Electrical Specifications ............................................................ 13
Connectors ... ...................................................................................... 13
Terminator .......................................................................................... 13
SCSI ID Setting .................................................................................. 13
Commands ......................................................................................... 14
Status ................................................................................................. 15
Display Messages .............................................................................. 15
Connector pin arrangement .................... ............................................ 16
IEEE 1394 Serial Bus Interface *Option* ............................................... 16
Control Code ............................................................................................... 17
Operation Specifications .............................................................................. 18
Buttons and Sw itches .............. ............................................................... 18
LED Specifications ................................................................................. 19
Switch Setting ......................................................................................... 19
Error Indication ....................................................................................... 20
Available Scan Area ............................................................................... 20
Transportation Screw ............................................................................. 21
CHAPTER 2 OPERATING PRINCIPLES
General Descript i on .... . .. .. .. . .. .. . .. .. .. . .. .. .. . .. .. .. . .. .. . .. .. .. . .. .. .. . .. .. .. . .. .. . .. .. .. . .. .. .. . .. 23
Mechanical Operation of the Scan ner ..... .. .. . .. .. . .. .. .. . .. .. .. . .. .. .. . .. .. . .. .. .. . .. .. .. . .. 24
Electrical Circuit Operations ........................................................................ 25
Control Circuit Operation ........................................................................ 25
Power Supply Circuit Operation ............................................................. 26
CHAPTER 3 TROUBLESHOOTING
Overview ..................................................................................................... 29
Errors and Causes of Errors .................................................................. 29
Troubleshooting ..................................................................................... 30
Test Points ......................................................................................... 30
Troubleshooting Other Errors ............................................................. 30
Troubleshooti ng Circui t B oard E rrors .......... . .. .... . .. .. .. ... .. .. . .. ... .. .. .. ... .. .. . .. 35
Power S upply B oard (B054 PS H B oard) ..... .. .. . .. .... . .. .. .. ... .. . .. .... . .. .. .. ... 35
Control Circuit Board (B093M AIN Board) ........................................... 35
CHAPTER 4 DISASSEMBLY & ASSEMBLY
Overview ..................................................................................................... 37
Tools ....... .. . .. .. . .. .. .. . .. .. .. . .. .. . .. .. .. . .. .. .. . .. .. .. . .. .. ....... . .. .. .. . .. .. .. . .. .. . .. .. .. . .. .. .. ... 37
Screws ................................................................................................... 38
Disa ss embly P rocedures . .. . .. .. . .. .. .. ....... . .. .. .. . .. .. . .. .. .. . .. .. .. . .. .. .. . .. .. ....... . .. .. .. . .. 40
Document Cover Unit Removal .............................................................. 41
Electrical Circuit Removal ...................................................................... 41
Main Boards Removal ........................................................................ 42
Scanner Body Disassembly ................................................................... 44
Upper Housing Removal .................................................................... 44
Scanner Mechanism Removal ........................................................... 45
Scanner Mechanism Disassembly ......................................................... 46
Panel Board Assembly Removal ........................................................ 46
Sub Board Assembly Removal ........................................................... 47
HP Sensor (CR) Remov al .................................................................. 48
CR Motor Assembly Removal ............................................................ 48
6
EPSON GT-10000 Revision A
Glass Frame Assembly Removal ....................................................... 49
Lamp Assembly and Inverter Board Assembly Removal ................... 52
Option Frame Assembly Removal ...................................................... 54
CHAPTER 5 ADJUSTMENTS
Updating Firmware .............. ........................................................................ 56
Preparations Before Updating ................................................................ 56
Updating Firmware ................................... .............................................. 57
Light Correction ........................................................................................... 61
Necessary Tools ..................................................................................... 61
Light Correction Procedure .................................................................... 61
CHAPTER 6 MAINTENANCE
CHAPTER 7 APPENDIX
Connector Pin Assignment .......................................................................... 67
Connector Pin Assignment ..................................................................... 67
Connector Summary .......................................................... .................... 67
Main Board Circuit Signals ................................................................. 68
Circuit Board Component Layout ...... .......................................................... 72
Circuit Diagram ............................................................................................ 74
Exploded Diagrams & ASP List ................................................................... 76
Exploded Diagrams ................................................................................ 76
ASP List .................................................................................................. 79
7
PRODUCT OUTLINE
CHAPTER
1
EPSON GT-10000 Revision A
1.1 Overview
The EPSON GT-10000 is an business/office A3 size flat-bed type color image
scanner for use wi th Microsoft® Windows®. The main features of the scanner
are:
o
High resolution
Optical resolution is 600 dpi
12 bit in, 8 bit out
o
Wide readable area
Scans up to A3 size originals
o
High-speed scanni ng
A3 portrai t with full color = 4mS/line
o
Option
Auto Document Feeder (same as GT-12000)
o
Network-use software
EPSON TWAIN Pro Network
EPSON Scan Se rver
o
Scan-Navigation button support
The scan button is functional when using the EPSON TWAIN Pro Network
o
Fast SCSI support
Up to 10MB/S in synchronous data transfer mode
o
International Energy Star compliant
o
High-speed seria l interface (planned option for Windows 2000)
IEEE1394 s erial interface standard
o
Quick operation
Xenon-Gas Cold Cathode Fluorescent Lamp does not require warm-up
period (same as GT-12000).
PRODUCT OUTLINE Overview 9
EPSON GT-10000 Revision A
1.2 Specifications
1.2.1 Basics
Type: Wide area, flat-bed color image scanner
Scanning Method: Sub-Scanning mirror movement system
Photoelectric Device: Color CCD Line senso r
Light Source: Xe-Gas Cold Cathode Fluorescent Lamp
Noise level: 50dB or less during operation
Document size: Up to A3
Max. Effective Pixels: 7020 x 10200 (600dpi)
Max. Scan Area: 297 x 432mm (11.7 x 17.0 inches)
Scanning Resolution: 600 (Main) by 1200 (Sub) dpi
Output Resolution: 50 to 4800dpi (1dp i increments)
Zoom: 50~200% (1% i ncrements)
Option: ADF (same unit as GT-12000)
Interfaces: SCSI (50 pi n connector)
IEEE1394 s erial interface (option for Windows 2000)
1.2.2 Image Handling Specifications
GAMMA CORRECTION
Five standard levels, plus one user definable
CRT A & B
Printer A, B, & C
COLOR CORRECTION
Four st andard levels, plus one user definable
Dot Matrix Printer
Thermal Printer
Ink Jet Printer
Color Monitor (CRT)
Scanning Speed: See the table below.
BRIGHTNESS CONTROL
Seven levels
Table 1-1. Scanning Speed
Setting Time required
Monochrome x2 Approx. 1.4mS/line
256 Grayscale Approx. 4.0mS/line
Full color Approx. 4.0mS/line
Note: Figures taken at 600dpi
Command Codes: ESC/I Command (B7 level)
FS Command
IMAGE PROCESSING
Two output methods: Bi-level = Fixed thres hold
TET (Text Enhancement Technology)
Half-toning: Error diffusion A, B, &C
Ditheri ng A, B, C, & D
User-defined dithering A & B
Focusing: AAS (Auto-Area Segmentation)
PRODUCT OUTLINE Specifications 10
EPSON GT-10000 Revision A
1.2.3 Electrical Specifications
Power supply voltage: Universal pow er
Rated v oltage = AC100 - 120 V (AC ± 10%)
Rated v oltage = AC220 - 240 V (AC ± 10%)
Rated frequency range: 50~ 60 Hz (49.5 - 60.5 Hz)
Power consumpti on: Approximately 50W (wit hout opti o n)
Approximately 55W (wit h option)
Ω
Insulati on resistance: 10M
Dielectric strength: AC1.2kV rms / minute (between AC line and chassis)
or more (DC 500V between AC line and
chassis)
1.2.4 Safety, EMC, EPA
Safety : UL1950 (UL)
CSA C22.2 NO.950 (CSA)
EN60950 (VDE)
IEC950 (ROSTES T, PSB)
EN61000-3-3
EN 50082-1
IEC 801-2
IEC 801-3
IEC 801-4
EPA: Energy Star Program
1.2.5 Resistance to Electric Noise
Static Electricity: Panel = 10kV
Metallic parts = 7kV (150pF/150
Ω)
1.2.6 Environmental Specifications
Temperature: Operating = 5 to 35°C
When not in use =- -25 to 60°C
Humidity: Operating = 10 to 80% (no condensation)
Storage = 10 to 85% (no condensati on)
EMC: FCC Part15 Subpart B C lass B
1.2.7 Reliability
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
EMC Directive 89/336/EEC EN55022 Class B
EN61000-3-2
PRODUCT OUTLINE Specifications 11
Main unit: MCBF: carriage = 100,000 cycles
Hinge = 25,000 turns
1.2.8 Operating Conditions
Dust: Ordinary office or home conditions.
(Should be kept away from extreme dust.)
Illumination: Operation under di rect sunlight or near strong light
source should be avoided.
EPSON GT-10000 Revision A
1.2.9 Original Document Condition
Reflective type: Smooth surface such as a printing and photograph.
1.2.10 Phy s ica l Dimens ion s and Weig h t
Dimensions : 656 (W) x 458 (D) x 176 mm (H)
(See Fig ure 1 -1.)
Weight: Approximately 21 Kg
m
m
8
5
4
Scan but ton
656mm
m
m
6
7
1
m
m
5
4
1
Figure 1-1. External Dimensions of the GT-10000
PRODUCT OUTLINE Specifications 12
EPSON GT-10000 Revision A
1.3 Interface Specifications
This s canner is equipped with two standard SCSI interfaces.
1.3.1 SCSI Interface
1.3.1.1 Basic Specifications
The SCSI interface specifications are described below, any items not included
in the following pages are in conformance with ANSI X3T9.2/375R revision 10L
(SCSI-2).
1.3.1.2 Functions
The following functions are included in ANSI X3T9.2/375R revision 10L
(SCSI-2).
Table 1-2. Functions
Phase/Condition Notes
BUS FREE
ARBITRATION
SELECTION/RESELECTION
• In this setup, LUN (logical Unit Number)
COMMAND
DATA IN
DATA OUT
is fixed at 0
• Command link function is not supported
The Level 1 SCAM target function is available. This is included in ANSI
T10/1142D revis ion 15.
1.3.1.3 SCSI Electrical Specifications
This devi ce conforms to regulations of the Single-ended drivers and receivers
included in ANSI X3T9.2/375R revision 10L (SCSI-2).
NOTE:
The length of the interface cable is limited to three meters when
using FAST SCSI. (Synchronous data transfer)
1.3.1.4 Connectors
Two 50-pin high-density connectors
1.3.1.5 Terminator
Internal terminator, set with the switch on the rear panel
1.3.1.6 SCSI ID Setting
o
ID is s et using the rotary switch on the rear panel, from 0 to 7. Other ID
numbers are reserved.SCSI-ID setting switch
CHECK
PO INT
Be sure to set the scanner to a SCSI ID number that is not
already in use.
Table 1-3. ID Setting
STATUS
MESSAGE IN
MESSAGE OUT
ATTENTION (condition)
RESET (condition)
ID Number Availability Note
0Available
1 Available
2Available
3 Available
Normally assigned to other SCSI
devices such as a hard disk drive
Normally assigned to other SCSI
devices such as a hard disk drive
Scanner default setting
PRODUCT OUTLINE Interface Specifications 13
EPSON GT-10000 Revision A
ID Number Availability Note
4 Available
5 Available
6 Available
7 Available
Blank Not Available
Blank Available
Normally assigned to the SCSI host
adapter.
Not effective / Not used
Used for firmware updates
Table 1-4. Terminator Switch
Setting Note
ON Connects to the terminal resi stor. /Factory default setting
OFF Disconnect s from the terminal resistor.
CHECK
PO INT
Be aware that the terminator switch must be set according
to the sc anner location on the daisy-chain.
1.3.1.7 Commands
This printer uses the following group “0” processor commands.
Table 1-5.
Command Code Description
Test Unit Ready 00h Confirms operation
Request Sense 03h Requires a Sense data
Receive 08h
Send 0Ah
Inquiry 12h
*1: SCSI-2 sense data format available
*2: The inquiry data is shown in the table below.
Table 1-6.
Peripheral Qualifier 000b
When an LUN other than #0 is specified,
this value is set in 011b
Data transmission from Target to
Initiator
Data transmission from Initiator to
Target
Requests information from SCSI
*2
device
*1
Peripheral Device
Type
RMB 00h Non-removable
Devie Type
Modifier
ISO version 00h
ECMA version 00h
ANSI version 02h SCSI-2
AENC 0b
03h
00h
Processor
When an LUN other than #0 is specified,
this value is set in 1fh
Does not support asynchronous event
notification
PRODUCT OUTLINE Interface Specifications 14
EPSON GT-10000 Revision A
TrmIOP 0b
Respo nse Data
Format
Additional length 23h
RelAdr 0b
Wbu s32 0b Does not support 32-bit wide data transfers
Wbus16 0b Does not support 16-bit wide data transfers
Sync 1b Supports synchronous data transfer
Linked 0b
CmdQue 0b
SftRe 0b Har d res et alternative
Vendor ID
Product ID
02h
“EPSON”,
20h, 20h,
20h
“Scanner”,
20h, “******”,
20h
Does not support Terminate I/O Process
messag e
Doe s not support relative addr essing for
this logical unit
Does not support linked commands for this
logical unit
Does not support tagged command
queuing for this logical unit
Note:: ****** = the product name
1.3.1.8 Status
The stat us is determined as follows.
Ta ble 1- 7 . Status Conditions
Status bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
GOOD R R 0 0 0 0 0 R
CHECK CONDITION R R 00001R
BUSY R R 0 0 1 0 0 R
Note: R = reserved
1.3.1.9 Display Messages
Table 1- 8. Messa ge Summary
Code Message Direction
00h Command complete In -
01h (Extended messages)
02h Save Data Pointer In -
03h Restore Pointer In -
04h Disconnect In -
05h Initiator Detected Error Out Yes
Negate ATN
before last ACK
Product Revision “****” Note:: ****** = the product name
Vendor Specific
00h, 00h,
00h, ffh
06h Abort Out Yes
07h Message Rejection In/Out Yes
08h No Operation Out Yes
09h Message Parity Error Out Yes
0ch Bus Device Reset Out Yes
80h-ffh Identify In/Out No
In = Target to Initiator
Out = Initiator to Target
Yes = Initiator shall negate ATN before last ACK of message
No = Initiator may or may not negate ATN before last ACK of message
PRODUCT OUTLINE Interface Specifications 15
EPSON GT-10000 Revision A
Table 1-9. Extended Message
Code Extended Message Name
01h SYNC HRONOUS DATA TRANSFER REQUEST Ye s
03h WIDE DATA TRANSFER REQUEST Yes
Negate ATN
before last ACK
1.3.1.10 Connector pin arrangement
25
50
Figure 1-2.
Table 1-10. SCSI Connector Functions
Signal In/Out Pin Number Description
GND
NC 13
DB0 I/O 26 Data Bus 0
DB1 I/O 27 Data Bus 1
DB2 I/O 28 Data Bus 2
DB3 I/O 29 Data Bus 3
DB4 I/O 30 Data Bus 4
DB5 I/O 31 Data Bus 5
DB6 I/O 32 Data Bus 6
DB7 I/O 33 Data Bus 7
DBP I/O 34 Data Bus Parity
TERMPWR 38 Terminator Power
ATN I 41 Attention
BSY I/O 43 Busy
ACK I 4 Acknowledge
RST I 45 Reset
1~12, 14~25, 35~37, 39, 40,
42
1
26
Table 1-10.
Signal In/Out Pin Number Description
MSG O 46 Message
SEL I/O 47 Select
C/D O 48 Command / Data
REQ O 49 Request
I/O O 50 Input / Output
(continued)
SCSI Connector Functions
1.3.2 IEEE 1394 Serial Bus Interface *Optio n*
For detai ls see t he sep arate IEE E 1394 S eri al Bus Inte rface serv ice manual.
PRODUCT OUTLINE Interface Specifications 16
EPSON GT-10000 Revision A
1.4 Control Code
The command level for this scanner is ESC/I-B8. The commands supported
are shown in t he table below.
Table 1-11. Control Code Summary
Category Command Code
Iden tity Request ESC I
Status Request ESC F
Exten d ed Status Request ESC f
Param et er Request ESC S
Initiate Scan ESC G
Execute Command
Request Push Button Status ESC !
Request Extended ID FS I
Request Scanner Status FS F
Request Scan Parameters FS S
Initiate New Scan FS G
Set Data Format ESC D i
Set Resolution ESC R n1 n2
Set Zoom ESC H i1 i2
Table 1-11. Control Code Summary (continued)
Category Command Code
Set Digi t al Half toni ng ESC B i
Set Auto Area Se gment at i on ESC s i
Download Dit her Pat te rn ESC b i j d (j^2)
Image Processing
Set Color Corre ction ESC M i
Download Color Corre cti on ESC m d1 d2~d9
Set Threshol d ESC t i
Set Scanning Mode ESC g i
Ini ti a liz e ESC @
Set Line Counter ESC d i
Miscellaneous
Control Opti on ESC e i
Eject Paper FF
Feed Paper PF
Normal Res ponse ACK
Abnormal Response NACK
Control
Stop Scanning CAN
Header STX
Set Data Format
Set Image Correct ion
Set Scan Area ESC A n1 n2 n3 n4
Set Color ESC C i
Set Mirroring ESC K I
Set Scan Parameter FS W
Set Brightness ESC L i
Set Gamma Correction ESC Z i
Download Gamma Tabl e ESC z i d0 d1~d255
Set Sharpness ESC Q i
PRODUCT OUTLINE Control Code 17
EPSON GT-10000 Revision A
1.5 Operation Specifications
1.5.1 Buttons and Switches
This s canner is equipped with 4 buttons/switches. Their functions are
described below:
Figure 1-3. Control Panel Indicators and Buttons
o
OPERATE button
Turns on and off the scanner. When turned on, it initializes the scanner.
o
RESET button
NOTE:
The factory default value for this scanner is 2.
Figure 1-4. SCSI ID Switch
o
SCSI terminator
Determines the internal terminator setting between
ON - last SCSI device on the daisy chain and
OFF - not the last SCSI device on the daisy chain.
NOTE:
The factory default setting f o r this switch is ON (terminated).
Re-initializes the scanner.
o
SCSI ID (rotary) switch
Sets the SCSI device ID for this scanner when the SCSI interface is used
to connect the scanner with the host computer.
Figure 1-5. SCSI Terminator Switch
PRODUCT OUTLINE Operation Specifications 18
EPSON GT-10000 Revision A
1.5.2 LED Specifications
This s canner has the following 3 LED indicators:
o
OPERATE indicator (Green)
Indicates w hether the scanner is on or off.
o
READY indicator (Green)
On when the scanne r is ready to receive commands. Flashes when data is
sent to/from the host computer.
When an error occurs, indicates the error type in combination with the
ERROR LED indi cator.
o
ERROR indicator (Red )
On when an error occurs.
1.5.3 Switch Setting
Among the switche s equipped with this scanner, SCSI switch and the
terminator s witch, which are used for SCSI interface, have the following
settings:
Table 1-12. SCSI ID Setting
ID No. Availability Note
0O
1 O
2O
Normally assigned to other SCSI devices such
as a hard disk drive
Normally assigned to other SCSI devices such
as a hard disk drive
Scanner default setting
ID No. Availability Note
7 O Reserve
Blank X
Blank O Used for firmware updates
CHECK
PO INT
Do not set the ID number that is already assigned to other
SCSI device.
Table 1-13. Terminator Switch
Setting Note
ON Connects to the terminal resistor. / Factory default setting.
OFF Disconnects from the terminal resistor.
CHECK
PO INT
Be aware that the terminator switch m ust be set according
to the scan ner location on the “daisy-chain”.
3 O Reserve
4 O Reserve
5 O Reserve
6 O Reserve
PRODUCT OUTLINE Operation Specifications 19
EPSON GT-10000 Revision A
1.5.4 Error Indication
If an error occurs, determine the error type referring to the status of the READY
and ERROR LED i ndicators.
Table 1-14. Indicator Status and Corresponding Errors
READY ERROR Error Type
On On Command error
Off Flashing Communication error
Flashin g Flashing Fatal error
Off Off Option error
Note: See Chapter 3 Troubleshooting for details on solving the error.
1.5.5 Available Scan Area
The origi n point for this scanner is marked at the rear left corner o f the
document table when viewed from the front. See Figure 1-6 for the maximum
scan area.
2 ± 1.5mm
297mm
Origin
Front
2 ± 1.5mm
432mm
Figure 1-6. Maximum Scan Area
PRODUCT OUTLINE Operation Specifications 20
EPSON GT-10000 Revision A
1.5.6 Transpo rtat io n Screw
A transporta ti on screw i s attached to th e left side of the scanner view ed from
the front. Fastening the screw fixes the CR to protect the scanner from the
shock while the scanner is transported or moved. Be sure to turn the screw to
the unlocking position (Described in the figure below.) before turning t he
scanner power on.
LOCK
for transportin g
UNLOCK
select during
normal use
Figure 1-7. Transportation Screw
PRODUCT OUTLINE Operation Specifications 21
OPERATING PRINCIPLES
CHAPTER
2
EPSON GT-10000 Revision A
2.1 General Description
The EPSON GT-10000 i s mainly composed of the following uni ts :
o
Scanner mechanism
(Lamp and mirror mechanism and drive unit, lens-CCD sensor unit drive
mechanism)
o
Control Circuit
o
Power supply circuit
The EPSON flat-bed type scanners usually read images by moving the integral
CR unit which consists of the lamp, mirror, and lens-CCD sensor. This
scanner, however, characteristically has the CCD sensor and the lens in the
whole unit attached onto the mechanism as an independent unit. This scanner
is also equipped with the newly designed focusing function which enables the
scanner to focus by adjusting the distance between the lens and the CCD
sensor. Since the separate units in the mechanism such as the lamp and the
mirrors move at their own speed for reading, the incident distance of the
reflected light from the document to the CCD sensor is kept constant.
B093PNL board
Lens
unit
B0931SN
board
(CCD
CN1
CN3
Lamp/mirror unit
CN2
B093SUB
Mirror
unit
CN4
HP sensor
(mirror)
B093SUB-B
board
Motor
(lamp/
mirror)
Drive
wires
CN5
CN6
The control circuit board and the power supply circuit board are stored in the
separate shi eld compartment. Since the only connections from the boards lead
to the connector board in the scanner mechanism, the shield compartment is
easy to remove and the scanner is easy to maintain.
SCSI
interface
B093MAIN
board (control
circuit)
interface
Terminator
ADF
SCSI ID switch
switch
AC in
B054PSH
board (power
supply)
Figure 2-1. Main Mechanism Structure of GT-10000
OPERATI N G PRINC IPLE S Gene ral Des c ript ion 23
EPSON GT-10000 Revision A
2.2 Mechanical Operation of the Scanner
Compared with other E PSON scanners, the main feature of this scanner lies in
its new optical mechanism used for reading images. Instead of the united lamp
& CCD movement system used for other scanners, this scanner scans with the
fix ed CCD sensor and separate lamp and the mirror units.
Since the color CCD line sensor is used for the reading device, only one light
source is equi pped and light is separated through the RGB color filter.
As shown in Figure 2-2, the light source (high luminance cold cat hode xenon
lamp), the first reflection mirror unit, and the second reflection mirror unit move
independently at their own speed. Therefore the length of the i ncident light
reflected from the document to the CCD sensor is kept constant.
Paper
Fixed
x 2
The ve rtical distance between the lamp plus the mirror in the Lamp/mirror unit
and the document surface remain constant. The vertical distance between the
mirrors i n the Mirror unit also remains constant . However, the horizontal
distances between the Lamp/mirror unit (rate = x2) and the Mirror unit (rate =
x1) as w ell as between the Mirror unit and Lens unit are constantly changing.
The stepp ing motor drives both movable units via wires.
The CCD sensor and the lens are united into one unit, which is semi-fixed on
the base frame. The only difference from GT-12000 is that the CCD lense
focus is fixed.
Variable
Glass
x 1
CCD sensor
Lens unit
Lamp/mirror unit
Fixed
Mirror unit
Variable
Figure 2-2. Optical Unit Structure
OPERATING PRINCIPLES Mechanical Ope ration of the Scanner 24
EPSON GT-10000 Revision A
2.3 Electrical Circuit Operations
This section describes the electrical circuitry of the GT-12000.
2.3.1 Control Circuit Operation
The control circuits of this scanner are:
o
B093MAIN board (Main control circuit board)
o
B093ISN board (CCD sensor board located on the CR)
o
B054PSH board
o
B093SUB board (Relay board)
o
B093SUB-B board (Copy button control)
o
B054PNL board (control panel)
Among the various functions controlled by the B093MAIN board as well as the
B093ISN, thes e boards control the scanning process from the CCD sensors to
the image signal processing as described below.
o
B093ISN Board (CCD image sensor)
n
Photoelectric conversion:
Converts light reflected from the document (light energy) into electrical
energy (electrical charge).
n
Amplification
n
A/D conversi on:
Converts the image data produced in the form of analog electrical
signals into 12-bit digital data.
H.P.
+5V,+15V
,+24V
(
HD6412350F20
(128K * 16bit)
PW/RS
SW
LED
x3
IC12
CPU
Flash ROM
IC7
Lamp
Unit
B
o
a
r
d
)
B
CR
0
9
Motor
3
P
N
L
Motor drive
(A3957 SL B )
IC 4/5
B093ISN Board
CCD (ILS123K)
IC7
AFE(VSP3000)
IC10 T-Rex
(E02A31EA)
Image
processing
-Shedding
-Gamma crrctn
-Line crrctn
-Main/sub ave.
-Color matching
-2/4 sizing
-TET
-AAS
B093SUB
Board
B093MAIN
Board
SDRAM
(16M * 8bit)
IC13
SRAM
(256K * 8bit)
IC14
o
B093 MAIN Board (processes image data)
ASIC (IC10) on this board manages most of the following functions:
n
Shading correction:
Performs image data correction on a black and white basis.
n
Processes the image data according to various setting information
provided by the host, such as gamma correction, color correction, and
halftoning correction.
After completing these processes, image data is output to the host.
SRAM
(32K * 8bit)
IC8/9
ID switch
CN3
Figure 2-3. Control Circuit Composition
(SPC7211)
I/F control
CN2
IC16
IC 17
(BH9596)
Trmntr ctrl
Switch
CN1
OPERATING PRINCIPLES Electrical Circuit Operations 25
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