Page 3 - NOTICE; Copyright © 1995 by SEIKO EPSON CORPORATION Nagano, Japan
NOTICE All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKOEPSON’s express written permission is forbidden. The contents of this manual are subjects to change without notice. All efforts have been made to ensure the accuracy of the contents of this manual...
Page 4 - PRECAUTIONS; DANGER; WARNING
PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage toequipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Greatcaution should be exercised in performing procedures preceded by DAN...
Page 5 - PREFACE; The contents of this manual are subject to change without notice.
PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair ofGT-5000 / Action Scanner II.The instructions and procedures included herein are intended for the experience repair technician, and attentionshould be given to the precautions on the pre...
Page 6 - REVISION SHEET; Revision
REVISION SHEET Revision Issue Date Revision Page Rev. A September 18, 1995 1st issue - v -
Page 7 - TABLE OF CONTENTS
TABLE OF CONTENTS CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENTS CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX - vi -
Page 8 - Table of Contents; INTERFACE SPECIFICATIONS
Chapter 1 Product Description Table of Contents 1.1 FEATURES 1-1 1.2 SPECIFICATIONS 1-3 1.2.1 Basic Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 10 - GT-5000 / Action Scanner II Service Manual
1.1 FEATURES The GT-5000 and ActionScanner II are low-cost, high-resolution (300 dpi) color image scanners for A4 orletter-size sheets. These scanners have two types of interface: one is the bidirectional parallel interface model,the other is the SCSI model. The main features of these scanners are: ...
Page 11 - Product Description
Table 1-1. Optional Units Model Description B80801* Bidirectional parallel interface board, PC-compatible (for Bi-D model) B860081 SCSI system cable, 25-pin to 50-pin (for SCSI model) B860091 SCSI peripheral cable, 50-pin to 50-pin (for SCSI model) B80618* EPSON Scanning Safari for Macintosh B80619*...
Page 13 - Figure 1-2. Maximum Size of Original for Scanning
1.2.3 Resistance to Electric Noise Static electricity: Panel - 10 KVMetal - 7 KV 1.2.4 Environmental Conditions Temperature Operating: 5 to 35° C (41 to 95° F) Storage: –20 to 60° C (–13 to 140° F) Humidity Operating: 10 to 80 %, no condensation Storage: 20 to 85 %, no condensation 1.2.5 Reliability...
Page 17 - Command; Table 1-4. Status Bits for SCSI Interface; Status
1.3.2.2 SCSI Commands This device uses the following group “0" processor commands: Table 1-3. Commands for SCSI Interface Command Code Description Test Unit Ready 00H Confirm for operation Request Sense 03H Requires sense data (See Note 1) Receive 08H Data transmission from target to initiator S...
Page 19 - BUTTONS AND INDICATORS; Buttons; The parallel model has not self-test mode.; Procedure for color page sequence mode
1.4 BUTTONS AND INDICATORS This scanner has two push buttons and three LED indicators for easy operation. Buttons OPERATE Turns the scanner on and off. When power is turned on, the scanner is reset. RESET Initializes the scanner. Every value is reset to the default value. Indicators OPERATE (green L...
Page 20 - Fatal Errors
1.6 ERRORS When an error occurs, the scanner displays the corresponding error message using the LEDs. Command Errors Cause: An unidentified command is detected. Scanner Response: The scanner ignores the command or parameter. (The current settings or thedefault values remain in effect.) The scanner s...
Page 21 - DATA TRANSMISSION PROTOCOL; Control Codes without Parameters; Control Codes with Parameters; S c a n n e r; Figure 1-5. Control Code without Parameters; SCANNER
1.7 DATA TRANSMISSION PROTOCOL This section describes the data transmission protocol used by the scanner and host computer. 1.7.1 Handshaking Control Codes This section describes the control codes for the handshaking procedure. Control Codes without Parameters Step 1 The host computer sends a contro...
Page 23 - Color Line Sequence Mode Reading (Line Transfer); Color Line Sequence Mode Reading (Block Transfer)
Color Line Sequence Mode Reading (Line Transfer) Step 1 The host computer sends a control code. Step 2 The scanner sends a data block (green). Step 3 The scanner sends another data block (red). Step 4 The scanner sends a third data block (blue). Step 5 The host computer responds:ACK (06H): Continue,...
Page 24 - Byte Sequence Mode Reading
Byte Sequence Mode Reading Step 1 The host computer sends a control code. Step 2 The scanner sends 1 data line. Step 3 The host computer responds:ACK (06H): Continue, send more data. CAN (18H): Abort. Step 3 The scanner sends the final data line. SCANNER HOST 3 3 1 2 4 2 Figure 1-12. Color Byte Sequ...
Page 27 - The Meaning of Each Status Bit; Bit
The Meaning of Each Status Bit Bit 7: Fatal error flag. Set when a system error occurs. Bit 6: Reserved. Bit 5: Area end flag. For color reading, set to 1 for the last data block of a color page. For monochrome reading, set to 1 for the last data block of the page. Bit 4: Option flag. When optional ...
Page 28 - SCANNER FUNCTIONS
1.8 SCANNER FUNCTIONS Table 1-8 summarizes the scanner’s functions and settings. These functions, which are explained on thefollowing pages, are all controlled by software commands. Table 1-8. Scanner Functions Function Command Available Settings Data format ESC D 1 to 8 bits per pixel for each colo...
Page 33 - CRT Display A; Printer Output A
1.8.10 Gamma Correction This function adjusts the image input/output light-intensity ratio, so that tones can be preserved when theimage is output to different types of devices. This ratio is called “gamma” ( γ ). See Figure 1-17 for a graphical representation of the five gamma correction settings. ...
Page 37 - Figure 1-25. Lower Case with Scanner Mechanism
1.9.4 Lower Case with Scanner Mechanism The lower case includes the scanner mechanism components. Among these components are the carriagemotor, the carriage mechanism, the home position sensor, and the scanner head. 1.9.5 Upper Case The upper case includes the document glass. Figure 1-25. Lower Case...
Page 38 - ENGINE OPERATIONS; List of Figures
Chapter 2 Operating Principles Table of Contents 2.1 ENGINE OPERATIONS 2-1 2.1.1 Scanner Head Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.1.2 Carriage Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.2 ...
Page 39 - Figure 2-2. Functions of Image Sensor Mechanism
2.1 ENGINE OPERATIONS This section describes the functions and operating principles of the GT-5000/ActionScanner II engine. Theengine contains a CCD image sensor with a reading resolution of 300 dpi. The engine consists of two mainsections: the sensor head and the carriage-movement mechanism. 2.1.1 ...
Page 40 - Photosensitive Section; Figure 2-3. Operation of the Photosensitive Section; Operating Principles
Photosensitive Section The photosensitive section converts the light energy into electrical signals and accumulates the resultingsignal charge over a short term. The description below explains the process of photoelectrical conversion tochange the incoming light energy into an accumulated signal cha...
Page 41 - Transmission Section; Output Section; Figure 2-5. Operations of the Transmission Section
Transmission Section This section receives the signal charge from the photosensitive section and transfers it to the output section.The transmission section contains two capacitors for each photodiode in the photosensitive section. There is only one output section, which means that the signal charge...
Page 42 - Figure 2-6. Reading of an Original Document
2.1.2 Carriage Operations Because photosensor elements are aligned and have a one-to-one correspondence with a horizontal row ofpixels, no mechanical operation is required for the main scan (one horizontal reading of the originaldocument). To read more than a single line, however, vertical movement ...
Page 43 - POWER SUPPLY OPERATIONS; Board; Table 2-2. Power Supply Output Voltages and Applications; Applications
2.2 POWER SUPPLY OPERATIONS The scanner can be powered by either of two power supply boards: the 120 V B034 PSB board or the220/240 V B034 PSE board. The only difference in the way these boards operate is in the primary circuitry.These power boards output the DC voltage necessary to drive the scanne...
Page 44 - Figure 2-8. Power Supply Circuit Block Diagram
The +12 VDC line contains a voltage overload protection circuit. The +12 V voltage overload protectioncircuit cuts the supply if the voltage reaches or exceeds +16 VDC. It stops the switching circuit operation,which stops the output of the +24 VDC line. The +24 VDC line has a voltage overload protec...
Page 45 - Figure 2-9. Control Circuit Block Diagram
2.3 CONTROL CIRCUITS This section describes the control circuit. 2.3.1 Control Circuit Outline The scanner CPU is a 16-bit, single-chip H8/3003. To simplify the circuitry, the circuits for correcting theimage data signals are collected into a gate array. Figure 2-9 is a block diagram of the control ...
Page 47 - Location
Table 2-3 lists the functions of the scanner’s main elements. Table 2-3. Functions of Main Elements Element Location Function H8/3003CPU IC5 The CPU, which operates at 8 MHz, controls scanner operations. E02A14Gate Array IC6 This gate array performs the following functions: Fluorescent lamp control ...
Page 48 - Figure 2-11. Block Diagram for Reset Circuit
2.3.2 Reset Circuit Figure 2-11 shows the reset circuit used to reset the controls. Immediately after power on and power off, the+5 VDC line voltage drops, and the reset IC (IC4, M51953AFP) outputs the reset signal from pin 6 (OUTport). 2.3.3 Home Position Sensor Circuit The home position sensor det...
Page 49 - Table 2-4. Inputs and Outputs of the M54670P Motor Driver; Input; Step; Figure 2-13. Block Diagram of Carriage Motor Drive Circuit
2.3.4 Carriage Motor Drive Circuit A constant current drives the carriage motor, a stepping motor that requires changes in the excitation status togenerate rotation. Table 2-4 indicates the relationship between the input and output excitation phase data of the M54670P motordriver. Table 2-5 indicate...
Page 52 - BEFORE BEGINNING DISASSEMBLY OR ASSEMBLY
Chapter 3 Disassembly and Assembly Table of Contents 3.1 BEFORE BEGINNING DISASSEMBLY OR ASSEMBLY 3-1 3.1.1 Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.2 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 53 - Name; Figure 3-1. Loosening the Transportation Screw
3.1 BEFORE BEGINNING DISASSEMBLY OR ASSEMBLY This section describes the precautions to take during disassembly or assembly, the tools required, and thesmall parts used in the scanner. 3.1.1 Precautions WARNING Before disassembling or assembling the scanner, disconnect the power supply cable from the...
Page 56 - DISASSEMBLY AND ASSEMBLY; CAUTION; Disassembly and Assembly
3.2 DISASSEMBLY AND ASSEMBLY This section describes how to disassemble and assemble the main components of the scanner. When theprocedure for installing a component in the scanner is simply the reverse of the procedure for removing thatcomponent from the printer, no installation description is given...
Page 57 - Figure 3-4. Removing the Carriage Assembly
3.2.3 Removing the Carriage Assembly 1. Remove the document cover and upper case. (Refer to Section 3.2.1.) 2. Disconnect FFCs from connectors CN2 and CN3 on the B034 MAIN/MAIN-B board. 3. Remove the FFCs along with ferrite core from the lower case. 4. Remove the CPS-tite (PS) (M3 × 6) screw and rem...
Page 59 - ASSEMBLY POINT
3.2.5 Removing the B034 MAIN/MAIN-B Board 1. Remove the bottom plate. (Refer to Section 3.2.2.) 2. Remove the upper case. (Refer to Section 3.2.1.) 3. Disconnect FFCs from connectors CN2 and CN3 on the B034 MAIN/MAIN-B board. 4. Disconnect connectors CN6, 7, 4, and 1 on the B034 MAIN/MAIN-B board. 5...
Page 62 - Disassembling the Carriage Assembly; Figure 3-10. Disassembling the CR Assembly
3.2.8 Disassembling the Carriage Assembly 1. Remove the document cover and the upper case. (Refer to Section 3.2.1.) 2. Remove the carriage assembly. (Refer to Section 3.2.3.) 3. Remove the 4 CPS-tite (O) screws and then remove the CR cover. 4. Remove the inverter board with lamp. 5. Disconnect conn...
Page 64 - REPAIR OF THE POWER SUPPLY BOARD; List of Tables
Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5-1 5.2 SELF-DIAGNOSTIC FUNCTION 5-1 5.3 TROUBLESHOOTING 5-2 5.3.1 Troubleshooting Abnormal Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 5.4 REPAIR OF THE POWER SUPPLY BOARD 5-8 5.5 REPAIR OF THE MAIN CONTROL BOARD 5-9 ...
Page 66 - Troubleshooting Abnormal Operations; Symptom; Troubleshooting
5.3 TROUBLESHOOTING This section describes how to troubleshoot abnormal operations and repair the unit. 5.3.1 Troubleshooting Abnormal Operations The table below tells how to identify malfunctions by symptom, determine their cause, and resolve them.Each entry in the table below refers you to a more ...
Page 72 - Table 5-14. Repair of the Power Supply Board; Condition
5.4 REPAIR OF THE POWER SUPPLY BOARD This section provides instructions for repairing a defective power supply board. Servicers who do not repairto the component level (including all servicers in the U.S.) can ignore this section. This table describes various problems, likely causes, checkpoints, an...
Page 73 - REPAIR OF THE MAIN CONTROL BOARD; Table 5-15. Repair of the Main Control Board; Problem
5.5 REPAIR OF THE MAIN CONTROL BOARD This section provides instructions for repairing a defective main board. Servicers who do not repair to thecomponent level (including all servicers in the U.S.) can ignore this section. This table describes various problems, likely causes, checkpoints, and soluti...
Page 79 - APPENDIX; A.1 CONNECTOR PIN ASSIGNMENTS
APPENDIX Table of Contents A.1 CONNECTOR PIN ASSIGNMENTS A-1 A.2 CIRCUIT DIAGRAM A-5 A.3 CIRCUIT BOARD COMPONENT LAYOUT A-10 A.4 EXPLODED DIAGRAM A-13 List of Figures Figure A-1. Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1Figure A-2. B034 MAIN Circ...
Page 81 - B034 PSB/PSE Power Supply Board
Table A-1. Board Connector Summary Connector Description Pins Reference B034 MAIN/ MAIN-B Control Circuit Board CN1 Connector for CR motor 4 pins Table A-2 CN2 Connector for CCD sensor for carriage assembly 12 pins Table A-3 CN3 Connector for carriage assembly inverter 10 pins Table A-4 CN4 Connecto...
Page 83 - Appendix
Table A-6. CN6 Pin Assignments Pin No. Signal Name I/O Description 1 HP I HP signal 2 GND — GND 3 +5 — +5 VDC Table A-7. CN7 Pin Assignments Pin No. Signal Name I/O Description 1 ERROR O ERROR LED 2 POWER O POWER LED 3 READY O READY LED 4 +5 — +5 VDC Appendix GT-5000 / Action Scanner II Service Manu...
Page 89 - A.3 CIRCUIT BOARD COMPONENT LAYOUTS
A.3 CIRCUIT BOARD COMPONENT LAYOUTS Figure A-7. B034 MAIN Component Layout (Side-A) Figure A-8. B034 MAIN Component Layout (Side-B) Appendix GT-5000 / Action Scanner II Service Manual A-10 Rev. A
Page 92 - A.4 EXPLODED DIAGRAMS
A.4 EXPLODED DIAGRAMS Figure A-13. Exploded Diagram GT-5000 / Action Scanner II Service Manual Appendix Rev. A A-13
Page 96 - EPSON OVERSEAS MARKETING LOCATIONS; EPSON DEUTCHLAND GmBH; EPSON IBERICA; EPSON ELECTRONICS TRADING LTD.
EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, INC EPSON DEUTCHLAND GmBH 20770 Madrona Avenue, Zülipicher Straße 6, 40549 Düsseldorf P.O. Box 2842 Germany Torrance, CA 90509-2842 Phone: 0211-56030 Phone: (800) 922-8911 Fax: 0211-504-7787 Fax: (310) 782-5220 EPSON UK LTD. EPSON FRANCE S.A. Campus ...
Page 98 - EPSON
