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Service Manual
Color Image Scanner
EPSON Perfection 1250/1250 PHOTO
®
TM-PERF1250
Printed in U.S.A.

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Troubleshooting

   Related Manuals for Epson Perfection 1250

   Summary of Contents for Epson Perfection 1250

  • Page 1

    Service Manual Color Image Scanner EPSON Perfection 1250/1250 PHOTO ® TM-PERF1250 Printed in U.S.A.

  • Page 3

    EPSON  Perfection 1250/1250 PHOTO Color Flatbed Scanner Service Manual...

  • Page 4: Copyright Notice

    Epson America, Inc. assumes no responsibility for errors and omissions. Neither Epson America, Inc., nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or...

  • Page 5

    EPSON Perfection 1250/1250 PHOTO FCC Compliance Statement for American Users This equipment has been tested and found to comply with the limits for Warning a Class B digital device, pursuant to Part 15 of the FCC Rules. These The connection of a non-shielded equipment interface cable to this...

  • Page 6

    EPSON Perfection 1250/1250 PHOTO Guide to Using This Manual Symbols Used in This Manual Before servicing the EPSON Perfection 1250/1250 PHOTO, read the DANGER Warnings must be followed to avoid personal injury precautions on the following page. Then turn to one of these chapters: or death.

  • Page 7: General Precautions

    The scanner’s as the rated voltage listed on the serial number/ primary circuitry remains live whenever it is rating plate. If the EPSON product has a primary plugged in. AC rating different from the available power source, do not connect it to the power source.

  • Page 8

    EPSON Perfection 1250/1250 PHOTO...

  • Page 9: Table Of Contents

    EPSON Perfection 1250/1250 PHOTO Contents Chapter 1 Product Basics Chapter 5 Maintenance Features ...................... 13 Overview ..................... 41 Lubrication ....................41 Control Panel ....................13 Chapter 6 Appendix Chapter 2 Technical Overview Specifications ....................45 Basic Operation ................... 17 Basic specifications ................45 Carriage Assembly .................

  • Page 10

    EPSON Perfection 1250/1250 PHOTO...

  • Page 11: Chapter 1 Product Basics

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

  • Page 13: Features

    Product Basics 1.1 Features 1.2 Control Panel There are two EPSON Perfection 1250 models: the 1250 and the 1250 The control panel includes four buttons, as shown below: PHOTO. The Perfection 1250 PHOTO ships with a TPU (transparency unit) as a standard feature.

  • Page 14

    EPSON Perfection 1250/1250 PHOTO Product Basics Indicator Lights Ready (green) Lit when the scanner is ready to receive commands. Flashes when data is sent to or from the host computer. Error (red) Lit when an error occurs.

  • Page 15: Chapter 2 Technical Overview

    C H A P T E R TECHNICAL OVERVIEW...

  • Page 17: Basic Operation

    The light that illuminates the document being scanned is reflected to the mirror and lens mechanism inside the carriage unit. The CCD sensor This chapter describes the basic operation of the Perfection 1250/1250 separates R, G and B components. PHOTO engine.

  • Page 18: Carriage Mechanism

    EPSON Perfection 1250/1250 PHOTO Technical Overview 2.1.2 Carriage Mechanism Rear CR HP sensor To generate an image, the document is scanned in the main scanning direction Carriage Assembly (single line scan) by the CCD sensor, and then in the sub-scanning direction (multiple line scan) by the carriage assembly as shown in Figure 2-3.

  • Page 19: Control Circuit Overview

    EPSON Perfection 1250/1250 PHOTO Technical Overview 2.2 Control Circuit Overview The scanner uses a single-chip, 16-bit bus CPU (IC16) which has a transmission frequency of 20 MHz. Input image signal correction, image processing and CCD sensor control are controlled by the ASIC (IC10). Table 2-1 describes each of the main ICs function.

  • Page 20

    EPSON Perfection 1250/1250 PHOTO Technical Overview MAIN Figure 2-5. Control Circuit Block Diagram...

  • Page 21: Chapter 3 Troubleshooting

    C H A P T E R TROUBLESHOOTING...

  • Page 23: Overview

    EPSON Perfection 1250/1250 PHOTO Troubleshooting 3.1 Overview 3.2 Error Processing Fatal errors Follow these steps to troubleshoot the scanner: Cause 1. Run a scan through the user interface and note which indicator lights are • Blown bulb (illumination is low) on.

  • Page 24: Scanner Self-diagnostics

    EPSON Perfection 1250/1250 PHOTO Troubleshooting 3.3 Scanner Self-Diagnostics 3.4 Unit-Level Troubleshooting When an error occurs, the scanner uses its Error and Ready indicator lights to Refer to one of these sections to solve scanner problems: display the type of error.

  • Page 25

    EPSON Perfection 1250/1250 PHOTO Troubleshooting SCANNER DOESN’T INITIALIZE CARRIAGE OPERATES BUT AN ERROR OCCURS When the scanner is powered up and connected to a computer with the driver If the carriage operates but the scanner detects an error: installed, the Operate light (LED) should come on, the carriage should move 1.

  • Page 26

    EPSON Perfection 1250/1250 PHOTO Troubleshooting SCANNER DOESN’T RECEIVE DATA FROM COMPUTER If the scanner doesn’t seem to receive data, check the following: 1. Make sure the USB controller is enabled. To do so: a. Start Windows. b. Select My Computer, click the right mouse button and choose Properties.

  • Page 27: Chapter 4 Disassembly & Assembly

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

  • Page 29: Overview

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.1 Overview 4.1.1 Required Tools Use the following tools when servicing the scanner: Follow the steps in this chapter to disassemble and assemble the scanner. Unless otherwise noted, you can reassemble the scanner by following the Table 4-1.

  • Page 30: Screws

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.1.2 Screws 4.2 Disassembly Procedures See the tables below if you’ve forgotten where to put a particular screw. This section describes the disassembly and removal procedures for each Screws are referred to by number throughout the disassembly instructions.

  • Page 31: Document Cover

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.2.2 Document Cover 4.2.3 Upper Cover Removal 1. Open the document cover. Preparation: " 2. Holding it by its edges, lift the document cover straight up to remove it. Remove the document cover as described in the previous section.

  • Page 32: Carriage Assembly Removal

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.2.4 Carriage Assembly Removal Hooks Preparation: " Remove the document cover as described in Document Cover page 31. " Release the carriage as described in Carriage Lock Release page 30. 1. Remove one screw (CBB, M2.5x12), and then remove the driven pulley to loosen the timing belt.

  • Page 33

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly When attaching the timing belt to the carriage assembly, R E A S S E M B L Y Loctite screw lock should be used. When applying the Loctite screw lock, turn the carriage...

  • Page 34: Motor Cr/timing Belt Removal

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.2.5 Motor CR/Timing Belt Removal CR Motor Unit Preparation: " Remove the document cover as described in Document Cover page 31. " Remove the upper cover as described in Upper Cover Removal page 31.

  • Page 35: Main Circuit Board Removal

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.2.6 Main Circuit Board Removal Drive Pulley Preparation: " Remove the document cover as described in Document Cover page 31. " Remove the upper cover as described in Upper Cover Removal page 31.

  • Page 36: Control Panel Board Removal

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.2.7 Control Panel Board Removal CR Motor Connector Carriage Cable Preparation: Connector " Remove the document cover as described in Document Cover page 31. " Remove the upper cover as described in Upper Cover Removal page 31.

  • Page 37

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly Control Panel Board Connector Figure 4-19. Control Panel Board Removal...

  • Page 38

    EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly...

  • Page 39: Chapter 5 Maintenance

    C H A P T E R MAINTENANCE...

  • Page 41: Overview

    EPSON Perfection 1250/1250 PHOTO Maintenance 5.1 Overview Table 5-2. Lubrication Points Perform cleaning when dirt is noticeable or affects the quality of scanned Figure Lubrication Points Lubrication images. Drive pulley shaft G-26 (1.0x3mm) Document Glass Tensioning pulley shaft G-26 (1.0x3mm) Clean with a soft, dry cloth.

  • Page 42

    EPSON Perfection 1250/1250 PHOTO Maintenance Tensioning Pully Shaft Figure 5-2. Lubrication Point CR Shaft Figure 5-3. Lubrication Point...

  • Page 43: Chapter 6 Appendix

    C H A P T E R APPENDIX...

  • Page 45: Specifications

    EPSON Perfection 1250/1250 PHOTO Appendix 6.1 Specifications Size 10.9” (W) x 17.2” (D) x 2.6” (H) 278 (W) x 438 (D) x 67 (H) mm This chapter provides additional information that may be useful when servicing the scanner. Weight Approx. 5.5 pounds (2.5 kg) 6.1.1 Basic specifications...

  • Page 46: Basic Tpu Specifications

    EPSON Perfection 1250/1250 PHOTO Appendix 6.1.2 Basic TPU specifications Light source White cold-cathode fluorescent lamp Max. scanning area 1.4” x 1.4” (36 mm x 36 mm) Document sizes 35 mm strip film (positive, negative) 35 mm slides (positive, negative) Dimensions 3.4”...

  • Page 47: Resistance To Electrical Noise

    EPSON Perfection 1250/1250 PHOTO Appendix TPU electrical characteristics 6.1.7 Documents " Rated input voltage 15 V DC Reflective documents Smooth surfaced documents " Rated power supply Operation: Average 4 W Transparent documents Negative and positive films can be scanned Standby:...

  • Page 48: Interface Specifications

    Max. packet size: 64 bytes Bulk out transfer End point 3 Max. packet size: 64 bytes Manufacturer's name: "EPSON" String descriptor Product name: "Perfection 1250/1250 PHOTO" Electrical specifications Conforms to high-speed (12 Mbps) mode specifications in the Universal Serial Bus specifications Revision 1.1...

  • Page 49: Control Codes

    EPSON Perfection 1250/1250 PHOTO Appendix 6.3 Control Codes 6.3.1 Scanner Connection Diagram The scanner connection diagram is shown below. The command level for this scanner is ESC/I-D2. The commands supported by the scanner are shown in the following table. Table 6-1. Control Codes...

  • Page 50: Connector Summary

    EPSON Perfection 1250/1250 PHOTO Appendix 6.3.2 Connector Summary Table 6-4. Main Circuit Board CN2 Pin No. Signal Connectors used in the scanner are listed below. For their pin assignments, refer to the tables listed in the right-hand column. –Data Table 6-2. Connector Summary +Data Ref.

  • Page 51

    EPSON Perfection 1250/1250 PHOTO Appendix Table 6-8. Main Circuit Board CN6 Pin No. Signal Pin No. Signal +15V +15V TPU_DETECT PM–SW4 — PM–SW3 — PM–SW2 PM–SW1 Table 6-9. CCD Circuit Board CN2 Pin No. Signal DETECT +LSV OP–LED — ERR–LED Table 6-10.

  • Page 52: Circuit Diagram

    EPSON Perfection 1250/1250 PHOTO Appendix 6.4 Circuit Diagram The following pages show the circuit diagrams for the scanner's control circuits. " Main (interface) Board " CCD Board...

  • Page 53

    EPSON Perfection 1250/1250 PHOTO Appendix Figure 6-4. Main (interface) Board...

  • Page 54

    EPSON Perfection 1250/1250 PHOTO Appendix Figure 6-5. CCD Board...

  • Page 55: Parts List And Exploded Diagrams

    EPSON Perfection 1250/1250 PHOTO Appendix 6.5 Parts List and Exploded Diagrams Table 6-11. Parts List Part No. Part Name PULLEY,DRIVE Table 6-11. Parts List PULLEY,DRIVEN Part No. Part Name SHIELD,BASE MAT,COVER,DOCUMENT SHIELD,VERTICAL HOUSING,LOWER SHIELD,BASE,BOARD COVER,DOCUMENT SHIELD,REAR LOCK,CARRIAGE SHIELD,FRONT FOOT HOLDER ASSY.,MOTOR...

  • Page 56

    EPSON Perfection 1250/1250 PHOTO Appendix The parts to which no reference number is assigned will not be available as after-sale service parts. GT-7200U/PERFECTION 1250 No.01 Rev.01 10328 Figure 6-6. Exploded Diagram (1)

  • Page 57

    EPSON Perfection 1250/1250 PHOTO Appendix The parts to which no reference number is assigned will not be available as after-sale service parts. GT-7200U/PERFECTION 1250 No.02 Rev.01 10328 Figure 6-7. Exploded Diagram (2)

  • Page 58

    EPSON Perfection 1250/1250 PHOTO Appendix PERFECTION 1250 PHOTO No.03 Rev.01 10328 Figure 6-8. Exploded Diagram (3)

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