Service manual

EPSON Perfection 1250/1250 PHOTO
9
Contents
Chapter 1 Product Basics
Features ...................................................................................................... 13
Control Panel ............................................................................................... 13
Chapter 2 Technical Overview
Basic Operation ........................................................................................... 17
Carriage Assembly ................................................................................. 17
Carriage Mechanism .............................................................................. 18
Control Circuit Overview .............................................................................. 19
Chapter 3 Troubleshooting
Overview ...................................................................................................... 23
Error Processing .......................................................................................... 23
Scanner Self-Diagnostics ............................................................................ 24
Unit-Level Troubleshooting .......................................................................... 24
Chapter 4 Disassembly & Assembly
Overview ...................................................................................................... 29
Required Tools ....................................................................................... 29
Screws .................................................................................................... 30
Disassembly Procedures ............................................................................. 30
Carriage Lock Release ........................................................................... 30
Document Cover .................................................................................... 31
Upper Cover Removal ............................................................................ 31
Carriage Assembly Removal .................................................................. 32
Motor CR/Timing Belt Removal .............................................................. 34
Main Circuit Board Removal ................................................................... 35
Control Panel Board Removal ................................................................ 36
Chapter 5 Maintenance
Overview ..................................................................................................... 41
Lubrication .............................................................................................. 41
Chapter 6 Appendix
Specifications .............................................................................................. 45
Basic specifications ................................................................................ 45
Basic TPU specifications ........................................................................ 46
Electrical specifications .......................................................................... 46
Resistance to electrical noise ................................................................. 47
Operating environment ........................................................................... 47
Reliability ................................................................................................ 47
Documents ............................................................................................. 47
Interface Specifications ............................................................................... 48
USB Interface ......................................................................................... 48
Control Codes ............................................................................................. 49
Scanner Connection Diagram ................................................................ 49
Connector Summary .............................................................................. 50
Connector Pin Assignments ................................................................... 50
Circuit Diagram ............................................................................................ 52
Parts List and Exploded Diagrams .............................................................. 55