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Epson
Scan 2500
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CHAPTER
2
OPERATING PRINCIPLES
Contents
Main
Notice:
PRECAUTIONS
WARNING
CAUTION
PREFACE
Page
Page
Contents
Product Description
Operating Principles
Troubleshooting
Disassembly & Assembly
Adjustment
Maintenance
Appendix
Page
Product Description Features 10
1.1 Features
1.2 General Specifications
1.2.1 Local copy
Table 1-1. Local Copy Specifications
Product Description General Specifications 11
1.2.2 Scan area
Figure 1-1. Scan Area
Table 1-2. Scan Area
Product Description General Specifications 12
1.2.3 Print area
Figure 1-2. Print Area
Table 1-3. Print Area
Product Description General Specifications 13
1.2.4 Printing
1.2.5 Input data buffer
1.2.6 Control codes
1.2.7 Paper feed
Table 1-4. Character code
1.2.8 Paper
Figure 1-3. Printable Area for Envelopes
Table 1-6. Envelope Margin
Product Description General Specifications 15
1.2.9 Ink
Figure 1-4. Black Ink Cartridge
Figure 1-5. Color Ink Cartridge
Product Description Scanner 16
1.3 Scanner
Product Description Common 17
1.4 Common
1.4.1 Electrical specifications
1.4.2 Safety, EMC
Product Description Common 18
1.4.3 Environmental conditions
Figure 1-6. Humidity and Temperature
1.4.4 Resistance to electric noise
1.4.5 Reliability
1.4.6 Acoustic noise
1.5 Interfaces
1.5.1 Printer Interface
PARALLEL
Product Description Interfaces 20
USB
Figure 1-7. USB Pin Configuration
PREVENTING DATA TRANSFER TIME-OUT OF HOSTS
INTERFACE SELECTION
1.5.2 Scanner interfaces
PARALLEL
Product Description Interfaces 22
USB
Table 1-8. Scanner Configuration for USB
Product Description Control Panel 23
1.6 Control Panel
Figure 1-8. Control Panel
1.6.1 Buttons
Table 1-9. Button functions
Table 1-10. Power-on functions
Product Description Control Panel 24
COPY BUTTON
Figure 1-9. LCD and Button Relationship
Table 1-12. Copy button functions
EPSON Stylus Scan 2500 Revision A
Product Description Control Panel 25
Table 1-12. Copy button functions (cont.)
Product Description Control Panel 26
1.6.2 Indicators and LCD Display
Table 1-14. LCD display and LED indicators
Table 1-14. LCD display and LED indicators (cont.)
Product Description Control Panel 27
1.6.3 Initialization
PRINTER INITIALIZATION
Table 1-15. Initialization
Product Description Settings Menu 28
SCANNER INITIALIZATION
1.7 Settings Menu
Table 1-16. Settings Menu
Product Description Stylus Scan Errors 29
MENUS
1.8 Stylus Scan Errors
PRINTER-SPECIFIC ERRORS
Table 1-17. Printer-SPECIFIC errors
Product Description Options 30
SCANNER-SPECIFIC ERRORS 1.9 Options
1.9.1 Local Copy
ADF
TPU
1.9.2 Scanning
ADF
Page
Page
Page
Operating Principles General 34
2.1 General
2.2 Printer Mechanism Operation
Motor Types and Corresponding Functions
Operating Principles Printer Mechanism Operation 35
Figure 2-1. Printer Mechanism Block Diagram
2.2.1 Printing Mechanism
Page
2.2.2 Printing Process
Operating Principles Printer Mechanism Operation 38
2.2.3 Carriage Mechanism and M otor
Figure 2-5. CR Motor Internal Circuit Diagram
Carriage Motor Specifications
Phase drive
CR Motor Control for Each Mode
Operating Principles Printer Mechanism Operation 39
PLATEN GAP LEVER
Figure 2-6. Carriage Mechanism with platen gap lever (Top view)
Operating Principles Printer Mechanism Operation 40
2.2.4 Paper Feeding Mechan ism
Figure 2-7. PF Motor Internal Circuit Diagram
PF Motor Specifications
Phase drive
Motor Control for Each Mode
Operating Principles Printer Mechanism Operation 41
Figure 2-8. Paper Feeding Mechanism (Top View)
Operating Principles Printer Mechanism Operation 42
MULTI-FEED PREVENTION MECHANISM
Figure 2-9. Multiple Paper Loading Prevention Mechanism (right side view)
Operating Principles Printer Mechanism Operation 43
SMALLER TRAILING-EDGE MARGIN
Figure 2-10. 3mm improved margin (viewed from right side)
Operating Principles Printer Mechanism Operation 44
CARRIAGE LOCK MECHANISM
Figure 2-11. CR Lock Mechanism
Operating Principles Printer Mechanism Operation 45
PAPER PICK-UP OPERATION
Figure 2-12. Paper Pickup Mechanism
Operating Principles Printer Mechanism Operation 46
2.2.5 Ink System
Figure 2-13. Ink System Mechanism
Figure 2-14. Major Ink Sequence Positions on Carriage
2.2.6 Pump, Carriage Lock, Head Cleaner Mechanism
Operating Principles Printer Mechanism Operation 47
Pump Motor Rotation and Function
Pumping modes
Operating Principles Printer Mechanism Operation 49
2.2.7 Cap Mechanism
Figure 2-17. Cap mechanism and valve operation
EPSON Stylus Scan 2500 Revision A
Operating Principles Scanner Principles 50
2.3 Scanner Principles
Figure 2-19. Mirror, Lens Mechanism
2.3.1 Carriage Unit
Figure 2-18. Carriage Unit Component
2.3.2 Carriage Operation
Operating Principles Local and PC Copy Principles 52
2.4 Local and PC Copy Principles
2.4.1 Local copy process
Stylus Scan 2500 Local Copy
Operating Principles Local and PC Copy Principles 53
2.4.2 PC copy process
2.4.2.1 Normal PC copy
2.4.2.2 Original color copy
PC Copy Settings
Operating Principles Electrical Circuit Operating Principles 54
2.5 Electrical Circuit Operating Principles
Figure 2-21. Electric Circuit of Stylus Color 2500
2.5.1 B102 PSB/PSE Board
Application of DC Voltage
Operating Principles Electrical Circuit Operating Principles 56
Figure 2-22. B101 PSB/PSE Board Block Diagram
2.5.2 B102 MAIN Board
Printer Block
System & Scanner Block
Local Copy Block
Page
Page
Troubleshooting Unit Level Troubleshooting 61
3.1 Unit Level Troubleshooting
Figure 3-1. Troubleshooting Process Flowchart
Table 3-1. Printer Condition and Panel Status
Troubleshooting Unit Level Troubleshooting 62
3.1.1 Printer/Scanner doe s no t operate at power on
Flowchart 3-1.
Table 3-2. Symptoms and Problem s
Start
Troubleshooting Unit Level Troubleshooting 63
3.1.2 Error is detected
Flowchart 3-3.
Flowchart 3-2.
3.1.3 Failure occurs during printing
Troubleshooting Unit Level Troubleshooting 64
3.1.4 Printer does not feed pape r correctly
Flowchart 3-5.
Flowchart 3-4.
3.1.5 Control panel operation is abnormal
START
3.2 Printer Related Troubleshooting
Table 3-3. Printer-Specific errors
Error Cause Solution
Troubleshooting Printer Related Troubleshooting 66
Table 3-4. Repair of the Printer Mechanis m
Troubleshooting Printer Related Troubleshooting 67
Table 3-4. Repair of the Printer Mechanism (cont.)
Troubleshooting Printer Related Troubleshooting 68
Table 3-4. Repair of the Printer Mechanism (cont.)
Page
Troubleshooting Scanner Troubleshooting 70
3.3 Scanner Troubleshooting
Table 3-5. User-level Scanner-Specifi c errors
Error Cause Solution
Table 3-6. Service Level Troubleshooting Starts Here
Table 3-7. Power problems
Troubleshooting Scanner Troubleshooting 71
Table 3-8. Scanner does not initialize
Table 3-7. Power problems (cont.)
Troubleshooting Scanner Troubleshooting 72
Table 3-9. Carriage Unit does not operate (cont.)
Table 3-11. The lamp does not light up.
Troubleshooting Scanner Troubleshooting 73
Table 3-12. Poor image quality
Table 3-13. SCSI Interface Error
Table 3-14. Parallel Interface Error
Table 3-15. Option unit malfunction
3.4 Troubleshooting Motors and Sensors
Table 3-16. Motor Resistance and Measurement Procedure
Table 3-17. Sensor Check
Page
4.1 Overview
4.1.1 Precautions for Disassembling the Printer
Page
Disassembly & Assembly Overview 77
4.1.2 Tools
4.1.3 Specification for Screws
Table 4-1. Tool Lis t
Table 4-2. Screw Characteristics
Page
Disassembly & Assembly Overview 79
4.1.4 Service Checks After Repair
Table 4-4. Inspection Checklist for the Stylus Scan
Disassembly & Assembly Overview 80
Table 4-4. Inspection Checklist for the Stylus Scan
Disassembly & Assembly Disassembly Procedures 81
4.2 Disassembly Procedures
Page
4.3.2 Removing the top cover
4.3.3 Removing the control panel assembly
Disassembly & Assembly Removing the Housing 84
4.3.4 Removing the side covers
4.3.5 Removing the scanner support frame
Disassembly & Assembly Removing the Housing 85
4.3.6 Removing the paper eject assembly
Disassembly & Assembly Removing the Housing 86
4.3.7 Removing the power supply board upper frame
Disassembly & Assembly Removing the Housing 87
4.3.8 Removal of the B102 PSB/PSE Board
4.3.9 Removing the printer mechanism
Page
4.4 Removal of the Circuit Board Tray
Page
4.5.1 Removing the waste ink pads
4.5.2 Removing the cleaning assembly (Pump and Cap)
Disassembly & Assembly Removal of the Printer Consumables 94
Page
4.6 Disassembling the Printer Mechanism
4.6.1 Removing the Printhead Unit
Disassembly & Assembly Disassembling the Printer Mechanism 97
Figure 4-3. Removing the Print Head Figure 4-4. Installing the Printhead
4.6.2 Removing the PF Motor Assembly
4.6.3 Removing the CR Motor Assembly
4.6.4 Removing the ASF Assembly
4.6.4.1 Disassembling t he ASF Roller Assembly
Page
4.6.4.2 Removing the Right and Left LD Roller Assembly
4.6.5 Removing the Carriage Assembly
Page
4.6.6 Removing the PF Roller Assembly
Page
4.6.7 Removing the PE Paper Detector Assembly
4.6.8 Removing the HP Detector
4.7 Disassembly of the Scanner Mechanism
Disassembly & Assembly Disassembly of the Scanner Mechanism 110
4.7.1 Removing the scanner
4.7.1.1 Removing the lamp
Disassembly & Assembly Disassembly of the Scanner Mechanism 111
4.7.1.2 Removing the scanner power supply board
4.7.1.3 Removing the scanner assembly from the scanner guide shaft
4.7.2 Removing the scanner motor
Page
Adjustment Required Adjustments 113
5.1 Required Adjustments
Table below shows the actions taken and required adjustments in the order to be performed.
Table 5-1. List of Service Procedures That Require Adjustment
Table 5-2. List of Required Adjustments
Adjustment Printer Adjustment 114
5.2 Printer Adjustment
5.2.1 Printer hardware adjustments
5.2.1.1 Parallelism Adjustment
[RIGHT PARALLELISM ADJUSTMENT]
Table 5-3. Adjustment Tools Required
Adjustment Printer Adjustment 115
[LEFT PARALLELISM ADJUSTMENT]
Figure 5-1. Setting the Parallelism-Adjustment Gauge
[CHECKING PARALLELISM]
[FIXING PARALLELISM ADJUSTMENT BUSHING]
5.3 Using the Service-Adjustment Program
5.3.1 Installing the program
Adjustment Using the Service-Adjustment Program 117
5.3.2 Openning the Start-up me nu
Figure 5-4. Inital Menu
HEAD ID MENU
Table 5-4. Software-based Adjustment Procedures
Table 5-5. Service Menu Items
Page
Page
Page
Page
Adjustment Using the Service-Adjustment Program 122
5.3.3 Initial Ink Charge Operation
5.3.4 Bi-D Adjustment
Adjustment Using the Service-Adjustment Program 123
Figure 5-7. Bi-D ADjustment Pattern Sample
5.3.5 Head Cleaning Operation
Adjustment Using the Service-Adjustment Program 124
5.3.6 Head Voltage ID Input
5.3.7 Head Angular Adjustmen t
Adjustment Using the Service-Adjustment Program 125
Figure 5-8. Sample of Head Angular Adjustment Pattern
Figure 5-9. Screw Position
Figure 5-10. Lever Operation
Adjustment Scanner Adjustment 126
5.4 Scanner Adjustment
Page
Maintenance Overview 129
6.1 Overview
6.1.1 Cleaning
6.1.2 Lubrication
6.1.2.1 Scanner lubrication points
6.1.2.2 Printer lu brication points
Maintenance Overview 130
Table 6-4. Lubrication Points
Maintenance Overview 131
Page
Page
Page
Page
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Maintenance Overview 137
Page
6.1.2.3 Scanner Mechanism
Page
Appendix Connector 141
7.1 Connector
CN12
CN6
Figure 7-1. Cable Connections for Stylus Scan 2500
CN11 CN10
7.1.1 Board Connector Summary
Table 7-1. Circuit Board Connector Summary (cont.)
Appendix Connector 143
7.1.2 Connector Pin Assignment
Table 7-3. Connector Pin Assignment-CN4
Table 7-4. Connector Pin Assignment-CN5
Table 7-5. Connector Pin Assignment-CN6
Table 7-6. Connector Pin Assignment-CN7
Appendix Connector 144
Table 7-7. Connector Pin Assignment-CN8
Table 7-8. Connector Pin Assignment-CN9
Table 7-9. Connector Pin Assignment-CN10
Table 7-10. Connector Pin Assignment-CN11
Appendix Connector 145
Table 7-11. Connector Pin Assignment-CN12
Table 7-12. Connector Pin Assignment-CN13
Table 7-13. Connector Pin Assignment-CN1 4
Table 7-14. Connector Pin Assignment-CN15
7.2 EEPROM Address Map
This section provides EEPROM address map for the Stylus Scan.
Table 7-15. Printer Unit EEPROM Address Map
Appendix EEPROM Address Map 147
Appendix EEPROM Address Map 148
Appendix EEPROM Address Map 149
Appendix EEPROM Address Map 150
Appendix EEPROM Address Map 151
Appendix Exploded Diagrams 152
7.3 Exploded Diagrams
This section contains the following exploded diagrams.
Versio n
EPSON STYLUS SCAN 2500 No.1
123
401
400
400 400
EPSON STYLUS SCAN 2500 No.2
EPSON STYLUS SCAN 2500 No.3
EPSON STYLUS SCAN 2500 No.4
EPSON STYLUS SCAN 2500 No.5
EPSON STYLUS SCAN 2500 No.6
EPSON STYLUS SCAN 2500 No.7
EPSON STYLUS SCAN 2500 No.8
PACKING MATERIAL FOR EPSON STYLUS SCAN 2500 Rev.01 10138
Appendix Parts List 162
7.4 Parts List
Appendix Parts List 163
Appendix Parts List 164
Appendix Parts List 165
Appendix Parts List 166