Epson perfection 640U Service Manual

[Page 1] Epson Perfection 640U Series

EPSON Perfection 640U Color Image Scanner SESC00-005 ® SERVICE MANUAL SERVICE MANUALSERVICE MANUAL SERVICE MANUAL ...

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EPSON Perfection 640U Rev. A 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, recording, or otherwise, without th...

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EPSON Perfection 640U Rev. A 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 in...

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EPSON Perfection 640U Rev. A 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 ...

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EPSON Perfection 640U Rev. A Revision Status Revision Issued Date Description A July 13, 2000 First Release ...

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EPSON Perfection 640U Revision A Contents Chapter 1 Product Description 1.1 Features .................................................................................................. 8 1.2 Specifications .............................................

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CHAPTER 1 PRODUCT DESCRIPTION ...

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EPSON Perfection 640U Revision A Product Description Features 8 1.1 Features The major features of the EPSON color image scanner Perfection 640U are as follows. ! Easy to use: USB I/F, Friendly user interface TWAIN EPSON Smart Panel (Achieve easy ...

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EPSON Perfection 640U Revision A Product Description Specifications 9 ! Number of hubs: This device must be in the Tier 1 or 2 with a recommended USB cable. (Tier 1: Host - this device, Tier 2: Host - Hub - this device) ! Light source: White cold ...

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EPSON Perfection 640U Revision A Product Description Specifications 10 RELIABILITY ! MCBF: 30,000 cycles OPERATING CONDITIONS ! Dust: Ordinary office or home conditions. Extreme dust should be avoided. ! Illumination: Operation under direct sunlight ...

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EPSON Perfection 640U Revision A Product Description Interface Specifications 11 1.3 Interface Specifications This section provides specifications of the USB, the only interface supported by the Perfection 640U. 1.3.1 USB Specifications Any items ...

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EPSON Perfection 640U Revision A Product Description Control Codes 12 1.4 Control Codes The command level of this scanner is ESC/I-D1 . The commands supported are shown in the table below. Table 1-3. Control Codes 1.5 Switches ! Push Button Swi...

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EPSON Perfection 640U Revision A Product Description Indicator Descriptions 13 1.6 Indicator Descriptions LED indicator shows the various conditions by turning on/off or blinking. Conditions indicated by LED indicator are as listed below: ! Status ...

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EPSON Perfection 640U Revision A Product Description Manuscript Table 14 1.8 Manuscript Table ! Dimension: 216 mm (Horizontal) x 297 mm (Vertical) 216 mm 3 ± 2 mm 297 mm Front 3 ± 2 mm Origin Point ...

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CHAPTER 2 OPERATING PRINCIPLES ...

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EPSON Perfection 640U RevIsion A Operating Principles Engine Mechanism 16 2.1 Engine Mechanism This section explains the engine functions and operating principles of the EPSON Perfection 640U. The engine mechanism has the two major parts; the carr...

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EPSON Perfection 640U RevIsion A Operating Principles Engine Mechanism 17 2.1.2 Carriage Drive Mechanism A line-type color CCD sensor, which is included in the carriage unit, scans one line at a time in the main scan direction (parallel to the carr...

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EPSON Perfection 640U RevIsion A Operating Principles Control Circuit 18 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 controlli...

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CHAPTER 3 TROUBLESHOOTING ...

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EPSON Perfection 640U Revision A Troubleshooting Overview 20 3.1 Overview This chapter describes troubleshooting procedures for this scanner. 3.2 Self-Diagnostic Function The self-diagnostic function of the scanner lets the scanner itself detect a...

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EPSON Perfection 640U Revision A Troubleshooting Troubleshooting 21 3.3 Troubleshooting This section describes how to troubleshoot problems according to exhibited phenomenons. See Table 3-2 that enables you to find the defective part to the unit l...

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EPSON Perfection 640U Revision A Troubleshooting Troubleshooting 22 Table 3-6. The lamp does not light up. Cause Step Checkpoints Finding Remedy CN1 on the main board is disconnected. 1 Check that CN1 is disconnected. Yes Connect CN1 on the main...

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CHAPTER 4 ASSEMBLY AND DISASSEMBLY ...

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EPSON Perfection 640U Revision A Assembly and Disassembly Overview 24 4.1 Overview This chapter describes procedures for disassembling the EPSON Perfection 640U. Unless otherwise specified, the scanner can be disassembled by reversing the disassem...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 25 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 ...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 26 4.2.2 Document Cover Removal 1. Open the Document Cover. 2. Lift the Document Cover by its edges to remove it. Figure 4-3. Document Cover Removal (1) Figure 4-4. D...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 27 4.2.3 Upper Housing Removal 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the two screws (gold, CBP...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 28 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 Uppe...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 29 6. Disconnect the connector for the Inverter Lamp from the Inverter Board. 7. Disconnect the 2-pin connector for the CCD sensor. 8. Release the two hooks, and then r...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 30 9. Remove the Lamp Cover from the Carriage Cover. 10. Remove the Inverter Lamp from the carriage cover. Figure 4-11. Inverter Lamp Removal (1) Figure 4-12. Inverter...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 31 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 S...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 32 6. Remove the six screws (gold, CBP, M3x8), and then remove the Main Circuit Board Shield Plate. 7. Use a standard screw driver to remove the Ferrite Core. 8. Discon...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 33 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 drive...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 34 4.2.6 Carriage Motor / Timing Belt 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 ...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 35 8. Follow the steps below to remove the Timing Belt from the CR Motor Unit. 1) Remove the E-ring from the transmission gear. 2) Remove the transmission gear. 3) Remo...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 36 4.2.7 Main 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 Sect...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 37 6. Remove the screw (CP, M3x5) near the I/F connector securing the Main Board. 7. Disconnect the following cables from the corresponding connectors; CR Motor - CN3,...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 38 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.) 3. Remove the Upper Housing. (See Sec...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 39 4.2.9 Carriage Rail 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 S...

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EPSON Perfection 640U Revision A Assembly and Disassembly Disassembly Procedures 40 4.2.10 Driven Pulley 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 ...

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CHAPTER 5 ADJUSTMENT ...

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EPSON Perfection 640U Revision A Adjustment 42 This scanner needs no adjustment at the level of the service, including part replacement, specified in Chapter 4 “Disassembly and Assembly”. ...

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CHAPTER 6 MAINTENANCE ...

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EPSON Perfection 640U Revision A Maintenance Overview 44 6.1 Overview This chapter provides information necessary to keep the scanner function in optimum condition constantly and to prevent troubles. 6.1.1 Cleaning Perform cleaning when stain is n...

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CHAPTER 7 APPENDIX ...

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EPSON Perfection 640U Revision A Appendix Overview 46 7.1 Overview This section provides useful information for servicing this scanner. 7.1.1 Interconnection Following figures shows interconnection of the scanner. Figure 7-1. Interconnection (USB)...

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EPSON Perfection 640U Revision A Appendix Overview 47 Table 7-2. Main Board - CN1 Table 7-3. Main Board - CN2 Table 7-4. Main Board - CN3 Table 7-5. Main Board - CN4 Table 7-6. CCD Sensor Board - CN2 Table 7-7. Inverter Board - CN2 Pin No. Sign...

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EPSON Perfection 640U Revision A Appendix Circuit Diagram 48 7.2 Circuit Diagram The figure on the next page shows the circuit diagram of B125 MAIN. ! B125 MAIN BOARD ...

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Not mounted Not mounted Not mounted Not mounted for check (side B) IC Socket Not mounted Not mounted Not mounted Not mounted Not mounted For USB connector detection ...

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EPSON Perfection 640U Revision A Appendix Parts List and Explode Diagrams 50 7.3 Parts List and Explode Diagrams Table 7-8. Parts List Ref. # Description Ref. # Description Ref. # Description 100 HOUSING ASSY.,LOWER;ASP 132 HOLDER ASSY.,PULLEY,DRI...

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EPSON Perfection 640U Revision A Appendix Parts List and Explode Diagrams 51 133 141 131 137 150 140 500 400 401 160 300 134 136 103 101 104 100 135 153 132 135 102 141 105 108 141 130 106 112 201 107 107 109 109 138 151 152 111 450 200 110 A A 1...

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EPSON Perfection 640U Revision A Appendix Parts List and Explode Diagrams 52 503 507 502 505 509 506 501 504 508 503 GT-6700U/Perfection 640U No.02 Rev.01 10234 ...

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