Epson Perfection 640U Series, Service Manual

EPSON Perfection 640U

Revision A

Contents

Chapter 1  Product Description

1.1  Features .................................................................................................. 8
1.2  Specifications .......................................................................................... 8
1.3  Interface Specifications ......................................................................... 11

1.3.1  USB Specifications........................................................................ 11

1.4  Control Codes........................................................................................ 12
1.5  Switches ................................................................................................ 12
1.6  Indicator Descriptions ............................................................................ 13
1.7  Error Indications .................................................................................... 13
1.8  Manuscript Table ................................................................................... 14

Chapter 2  Operating Principles

2.1  Engine Mechanism ................................................................................ 16

2.1.1  Carriage Unit ................................................................................. 16
2.1.2  Carriage Drive Mechanism............................................................ 17

2.2  Control Circuit........................................................................................ 18

Chapter 3  Troubleshooting

3.1  Overview................................................................................................ 20
3.2  Self-Diagnostic Function........................................................................ 20
3.3  Troubleshooting..................................................................................... 21

Chapter 4  Assembly and Disassembly

4.1  Overview................................................................................................ 24

4.1.1  Precautions ................................................................................... 24
4.1.2  Tools.............................................................................................. 24
4.1.3  Screws........................................................................................... 24

4.2  Disassembly Procedures....................................................................... 25

4.2.1  Releasing the Carriage Lock......................................................... 25
4.2.2  Document Cover Removal ............................................................ 26
4.2.3  Upper Housing Removal ............................................................... 27
4.2.4  Inverter Lamp / Inverter Board Removal ....................................... 28
4.2.5  Carriage Unit Removal.................................................................. 31
4.2.6  Carriage Motor / Timing Belt Removal .......................................... 34
4.2.7  Main Board Removal..................................................................... 36
4.2.8  Panel Board Removal ................................................................... 38
4.2.9  Carriage Rail Removal .................................................................. 39
4.2.10  Driven Pulley Removal................................................................ 40

Chapter 5  Adjustment

Chapter 6  Maintenance

6.1  Overview ............................................................................................... 44

6.1.1  Cleaning ........................................................................................ 44
6.1.2  Lubrication..................................................................................... 44

Chapter 7  Appendix

7.1  Overview ............................................................................................... 46

7.1.1  Interconnection.............................................................................. 46
7.1.2  Connector Assignment.................................................................. 46

7.2  Circuit Diagram...................................................................................... 48
7.3  Parts List and Explode Diagrams .......................................................... 50