Epson perfection 640U Service Manual
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Epson perfection 640U Service Manual

Epson perfection 640U Service Manual

Color image scanner
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SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
Color Image Scanner
EPSON Perfection 640U
®
SESC00-005

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Summary of Contents for Epson perfection 640U

  • Page 1 SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL Color Image Scanner EPSON Perfection 640U ® SESC00-005...
  • Page 2 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.
  • Page 3 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.
  • Page 4 PREFACE This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Perfection 640U. 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.
  • Page 5 EPSON Perfection 640U Rev. A Revision Status Revision Issued Date Description July 13, 2000 First Release...

  • Page 6: Table Of Contents

    EPSON Perfection 640U Revision A Contents Chapter 1 Product Description 4.2.1 Releasing the Carriage Lock............25 4.2.2 Document Cover Removal ............26 1.1 Features ....................8 4.2.3 Upper Housing Removal ............... 27 4.2.4 Inverter Lamp / Inverter Board Removal ........28 1.2 Specifications ..................

  • Page 7: Chapter 1 Product Description

    C H A P T E R PRODUCT DESCRIPTION...

  • Page 8: Features

    EPSON Perfection 640U Revision A 1.1 Features 1.2 Specifications The major features of the EPSON color image scanner Perfection 640U are as GENERAL SPECIFICATIONS follows. Product type: Flatbed color image scanner Easy to use: USB I/F, Friendly user interface TWAIN...
  • Page 9 EPSON Perfection 640U Revision A Number of hubs: This device must be in the Tier 1 or 2 with a " Dielectric strength: AC 1.2kV, 1 min recommended USB cable. (between AC line and chassis) (Tier 1: Host - this device, Tier 2: Host - Hub -...
  • Page 10 Reflective type: Documents which has a smooth surface such as printing and photograph. DIMENSION Dimension: 269(W) x 435(D) x 93(H) mm Refer to Figure 1-2. Weight: 2.8 Kg 269mm Figure 1-2. Exterior Dimension of the Perfection 640U Product Description Specifications...

  • Page 11: Interface Specifications

    EPSON Perfection 640U Revision A 1.3 Interface Specifications This section provides specifications of the USB, the only interface supported by the Perfection 640U. Table 1-2. Configuration Element Description 1.3.1 USB Specifications • Class: Vendor specific Any items not included in this specification shall be in compliance with •...

  • Page 12: Control Codes

    Set Scanning Area ESC A n1 n2 n3 n4 " START Button: EPSON Smart Panel (ESP) is run, and export a Set Color ESC C i image data to application which user assigned to Set Gamma Correction ESC Z i relate with the START button.

  • Page 13: Indicator Descriptions

    EPSON Perfection 640U Revision A 1.6 Indicator Descriptions INTERFACE ERROR Cause: Detects the wrong action in the communication LED indicator shows the various conditions by turning on/off or blinking. procedure. Conditions indicated by LED indicator are as listed below: Disposition: Lamp goes off and scanner stops operating.

  • Page 14: Manuscript Table

    EPSON Perfection 640U Revision A 1.8 Manuscript Table Dimension: 216 mm (Horizontal) x 297 mm (Vertical) 3 ± 2 mm 216 mm 3 ± 2 mm Origin Point 297 mm Front Product Description Manuscript Table...

  • Page 15: Chapter 2 Operating Principles

    C H A P T E R OPERATING PRINCIPLES...

  • Page 16: Engine Mechanism

    This board includes the Color CCD line sensor (independent R,G,B) and the sensor’s control and driver circuits. This section explains the engine functions and operating principles of the EPSON Perfection 640U. The engine mechanism has the two major parts; the " Inverter Board carriage unit (=scanning head) and the carriage move mechanism.

  • Page 17: Carriage Drive Mechanism

    EPSON Perfection 640U RevIsion A 2.1.2 Carriage Drive Mechanism The carriage unit slides in the sub-scan direction along the guide rail. To slide the carriage, the carriage (CR) motor drives the timing belt attached to the A line-type color CCD sensor, which is included in the carriage unit, scans one carriage unit by conveying torque via the drive pulley and transmission gear.

  • Page 18: Control Circuit

    EPSON Perfection 640U RevIsion A 2.2 Control Circuit The CPU (IC12) of this scanner is a one-tip 16-bit bus CPU operating at 16MHz. ASIC (IC9) manages input signal correction, image processing, and controlling the CCD sensor board and USB interface. The power supply control uses a DC/DC converter to generate 5 V and 12 V signals from the 24 V DC input.

  • Page 19: Chapter 3 Troubleshooting

    C H A P T E R TROUBLESHOOTING...

  • Page 20: Overview

    EPSON Perfection 640U Revision A 3.1 Overview Table 3-1. Errors Detected by the Self-Diagnostic Function This chapter describes troubleshooting procedures for this scanner. Lamp Condition Error Type (Cause Remedy) Red LED lighting up Command Error 3.2 Self-Diagnostic Function Cause: Undefined command or undefined command parameter is received.

  • Page 21: Troubleshooting

    EPSON Perfection 640U Revision A 3.3 Troubleshooting Table 3-4. The carriage unit does not operate. Cause Step Checkpoints Finding Remedy This section describes how to troubleshoot problems according to CN3 on the Check that CN3 is disconnected. Connect CN3 on exhibited phenomenons.
  • Page 22 EPSON Perfection 640U Revision A Table 3-6. The lamp does not light up. Table 3-8. USB Interface Error Cause Step Checkpoints Finding Remedy Cause Step Checkpoints Finding Remedy CN1 on the Check that CN1 is Connect CN1 on The host does On the Windows, access Replace the host.

  • Page 23: Chapter 4 Assembly And Disassembly

    C H A P T E R ASSEMBLY AND DISASSEMBLY...

  • Page 24: Overview

    4.1 Overview 4.1.2 Tools Use the tools specified in Table 4-1. This chapter describes procedures for disassembling the EPSON Table 4-1. Tools Perfection 640U. Unless otherwise specified, the scanner can be disassembled by reversing the disassembly procedures. Names Availability Part Number Phillips screw driver (#2) "...

  • Page 25: Disassembly Procedures

    EPSON Perfection 640U Revision A 4.2 Disassembly Procedures 4.2.1 Releasing the Carriage Lock 1. Disconnect the AC adapter from the scanner body. 2. Check that the carriage lock at the back of the scanner body is released. Released Locked Figure 4-2. Carriage lock position...

  • Page 26: Document Cover Removal

    EPSON Perfection 640U Revision A 4.2.2 Document Cover Removal 1. Open the Document Cover. 2. Lift the Document Cover by its edges to remove it. Document Cover Figure 4-3. Document Cover Removal (1) Figure 4-4. Document Cover Removal (2) Assembly and Disassembly...

  • Page 27: Upper Housing Removal

    EPSON Perfection 640U Revision A 4.2.3 Upper Housing Removal 1. Release the Carriage Lock. (See Section 4.2.1.) Two Hooks on the Front 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the two screws (gold, CBP, M3x8) at the back of the scanner body.

  • Page 28: Inverter Lamp / Inverter Board Removal

    EPSON Perfection 640U Revision A 4.2.4 Inverter Lamp / Inverter Board Removal 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Remove the two screws (CCP, M3x8) on the Carriage Unit. (See Figure 4-8.)
  • Page 29 EPSON Perfection 640U Revision A 6. Disconnect the connector for the Inverter Lamp from the Inverter Board. Connector 7. Disconnect the 2-pin connector for the CCD sensor. Inverter Board 8. Release the two hooks, and then remove the Inverter Board.
  • Page 30 EPSON Perfection 640U Revision A 9. Remove the Lamp Cover from the Carriage Cover. 10. Remove the Inverter Lamp from the carriage cover. • When installing the Inverter Lamp, be sure to C H E C K connect it to the hook on the Carriage Cover.

  • Page 31: Carriage Unit Removal

    EPSON Perfection 640U Revision A 4.2.5 Carriage Unit Removal 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Remove the Clip Shaft. 5. Raise the Carriage Unit slightly to remove it from the timing belt, remove the Carriage Guide Shaft, and then remove the Carriage Unit.
  • Page 32 EPSON Perfection 640U Revision A 6. Remove the six screws (gold, CBP, M3x8), and then remove the Main Circuit Board Shield Plate. 6. CBS Screw (M3x8) 7. Use a standard screw driver to remove the Ferrite Core. 6. Main Board Cover 8.
  • Page 33 EPSON Perfection 640U Revision A 9. FFC Cable Removal 1) Remove the two screws (CCP, M3x8) on top of the Carriage Unit. (See Section 4.2.4.) 2) Remove the Carriage Cover. (Use a standard screw driver to raise the Carriage Cover and then pull it backward.) (See Section 4.2.4.)

  • Page 34: Carriage Motor / Timing Belt Removal

    EPSON Perfection 640U Revision A 4.2.6 Carriage Motor / Timing Belt Removal 5. CBS Screw (M3x8) 1. Release the Carriage Lock. (See Section 4.2.1.) 5. Main Board Cover 6. CBS Screws M3x8) 2. Remove the Document Cover. (See Section 4.2.2.) 3.
  • Page 35 EPSON Perfection 640U Revision A 8. Follow the steps below to remove the Timing Belt from the CR Motor Unit. Transmission Gear 1) Remove the E-ring from the transmission gear. Drive Pulley 2) Remove the transmission gear. 3) Remove the E-ring from the drive pulley.

  • Page 36: Main Board Removal

    EPSON Perfection 640U Revision A 4.2.7 Main Board Removal 5. CBS Screws (M3x4) 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Slide the Carriage Unit slowly until you see the whole main board cover.
  • Page 37 EPSON Perfection 640U Revision A 6. Remove the screw (CP, M3x5) near the I/F connector securing the Carriage FFC Connector Main Board. CN4 (Panel Board) 7. Disconnect the following cables from the corresponding connectors; CR Motor - CN3, carriage FFC, Panel Board - CN4.

  • Page 38: Panel Board Removal

    EPSON Perfection 640U Revision A 4.2.8 Panel Board Removal 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) Hooks 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Disconnect the Connector (CN1) and Hooks (x2), and then remove the Panel Board.

  • Page 39: Carriage Rail Removal

    EPSON Perfection 640U Revision A 4.2.9 Carriage Rail Removal CCP Screws (M3x8) 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Remove the Carriage Unit. (See Steps 1-6 in Section 4.2.5.) 5.

  • Page 40: Driven Pulley Removal

    EPSON Perfection 640U Revision A 4.2.10 Driven Pulley Removal Torsion Spring Hooks 1. Release the Carriage Lock. (See Section 4.2.1.) CCP Screws (M3x8) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) Driven Pulley Holder 4.

  • Page 41: Chapter 5 Adjustment

    C H A P T E R ADJUSTMENT...
  • Page 42 EPSON Perfection 640U Revision A This scanner needs no adjustment at the level of the service, including part replacement, specified in Chapter 4 “Disassembly and Assembly”. Adjustment...

  • Page 43: Chapter 6 Maintenance

    C H A P T E R MAINTENANCE...

  • Page 44: Overview

    See the following tables for the recommended grease type and points to apply it. Table 6-1. Recommended Grease Grease Type Contents Part Number Availability G-26 B702600001 G-26 *: EPSON exclusive (Not on the market) Figure 6-1. Lubrication Points Maintenance Overview...

  • Page 45: Chapter 7 Appendix

    C H A P T E R APPENDIX...

  • Page 46: Overview

    EPSON Perfection 640U Revision A 7.1 Overview 7.1.2 Connector Assignment This section provides useful information for servicing this scanner. Table 7-1. Connector Summary- B103MAIN Connector Number 7.1.1 Interconnection Description Refer to: Number of Pins B125MAIN Board Following figures shows interconnection of the scanner.
  • Page 47 EPSON Perfection 640U Revision A Table 7-2. Main Board - CN1 Table 7-5. Main Board - CN4 Pin No. Signal Pin No. Signal 1, 3, 5, 7, 18 OP-LED ERR-LED PM-SW1 B-SH PM-SW2 R-SH PM-SW3 G-SH Table 7-6. CCD Sensor Board - CN2 Pin No.

  • Page 48: Circuit Diagram

    EPSON Perfection 640U Revision A 7.2 Circuit Diagram The figure on the next page shows the circuit diagram of B125 MAIN. B125 MAIN BOARD Appendix Circuit Diagram...
  • Page 49 Not mounted mounted Not mounted Not mounted Not mounted For USB connector detection Not mounted mounted IC Socket for check (side B) Not mounted mounted...

  • Page 50: Parts List And Explode Diagrams

    EPSON Perfection 640U Revision A 7.3 Parts List and Explode Diagrams Table 7-8. Parts List Ref. # Description Ref. # Description Ref. # Description HOUSING ASSY.,LOWER;ASP HOLDER ASSY.,PULLEY,DRIVEN WIRE HARNESS HOUSING ASSY.,UPPER;ASP TORSION SPRING,238 AC ADAPTER OTHERS LEVER,MOUNT,CARRIAGE SHAFT,CR POWER CABLE...
  • Page 51 EPSON Perfection 640U Revision A See next page. 142 140 GT-6700U/Perfection 640U No.01 Rev.01 10234 Appendix Parts List and Explode Diagrams...
  • Page 52 EPSON Perfection 640U Revision A GT-6700U/Perfection 640U No.02 Rev.01 10234 Appendix Parts List and Explode Diagrams...

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