Service Manual Color Image Scanner EPSON Perfection 1250/1250 PHOTO ® TM-PERF1250 Printed in U.S.A.
EPSON Perfection 1250/1250 PHOTO Color Flatbed Scanner Service Manual
EPSON Perfection 1250/1250 PHOTO Copyright Notice 2001 Epson America, Inc. 3480 Kilroy Airport Way, Long Beach CA, 90806-2469 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the written permission of Epson America, Inc. Trademark Information EPSON® and ESC/P® are registered trademarks of Seiko Epson.
EPSON Perfection 1250/1250 PHOTO FCC Compliance Statement for American Users This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
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 precautions on the following page. Then turn to one of these chapters: Chapter 1. Product Basics Lists the main features of the product and describes basic control panel operations. Chapter 2. Technical Overview Explains how the product works. Chapter 3. Troubleshooting Tells how to identify and correct common problems. Chapter 4.
EPSON Perfection 1250/1250 PHOTO General Precautions DANGER " When servicing, unplug the scanner from the power outlet and disconnect any attached devices. " Never touch the primary parts of the power supply when the scanner is plugged in. The scanner’s primary circuitry remains live whenever it is plugged in. " No work should be performed on the unit by persons unfamiliar with basic safety measures familiar to trained electronics technicians.
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EPSON Perfection 1250/1250 PHOTO Contents Chapter 1 Product Basics Chapter 5 Maintenance Features ...................................................................................................... 13 Control Panel ............................................................................................... 13 Overview ..................................................................................................... 41 Lubrication .................................................................
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1 CHAPTER PRODUCT BASICS
EPSON Perfection 1250/1250 PHOTO Product Basics 1.1 Features 1.2 Control Panel There are two EPSON Perfection 1250 models: the 1250 and the 1250 PHOTO. The Perfection 1250 PHOTO ships with a TPU (transparency unit) as a standard feature. Both models are flat-bed color image scanners capable of scanning up to A4 size documents (maximum scan area: 8.5 × 11.7 inch).
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.
2 CHAPTER TECHNICAL OVERVIEW
EPSON Perfection 1250/1250 PHOTO Technical Overview # Mirror and lens mechanism 2.1 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 separates R, G and B components. This chapter describes the basic operation of the Perfection 1250/1250 PHOTO engine. Front 2.1.
EPSON Perfection 1250/1250 PHOTO Technical Overview 2.1.2 Carriage Mechanism Rear To generate an image, the document is scanned in the main scanning direction (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. The color CCD sensor can only scan a single line in the main scanning direction (which runs parallel to the carriage assembly direction).
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. Table 2-1.
EPSON Perfection 1250/1250 PHOTO Technical Overview MAIN Figure 2-5.
3 CHAPTER TROUBLESHOOTING
EPSON Perfection 1250/1250 PHOTO Troubleshooting 3.1 Overview 3.2 Error Processing Follow these steps to troubleshoot the scanner: Fatal errors ! Cause 1. Run a scan through the user interface and note which indicator lights are on. Then determine their meaning in Scanner Self-Diagnostics on page 24, and try the remedy provided. 2. If that doesn’t work, see Unit-Level Troubleshooting on page 24.
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 display the type of error. Refer to one of these sections to solve scanner problems: See the table below to determine the type of error: ! Carriage Doesn’t Move on page 25 Table 3-1.
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 installed, the Operate light (LED) should come on, the carriage should move briefly to the right and then return to home position. If you don’t see this, check the following: If the carriage operates but the scanner detects an error: 1. Make sure all connectors, especially on the power supply board, are secure. 2.
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. c. Click Device Manager and make sure Universal Serial Bus Controller is enabled. 2. The TWAIN driver user interface is not installed correctly.
4 CHAPTER DISASSEMBLY & ASSEMBLY
EPSON Perfection 1250/1250 PHOTO 4.1 Overview Follow the steps in this chapter to disassemble and assemble the scanner. Unless otherwise noted, you can reassemble the scanner by following the disassembly steps in reverse. DANGER 4.1.1 Required Tools Use the following tools when servicing the scanner: Table 4-1. Tool List Description " Unplug the scanner from the AC power outlet before servicing. " Wear gloves and use an anti-static device such as a wrist strap when servicing the scanner.
EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly 4.2 Disassembly Procedures 4.1.2 Screws See the tables below if you’ve forgotten where to put a particular screw. Screws are referred to by number throughout the disassembly instructions. This section describes the disassembly and removal procedures for each major component of the scanner. Table 4-2. Screw Name Abbreviations 4.2.1 Carriage Lock Release Abbreviation Screw Name CBP P-type cross-head binding screw 1.
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. " Move the carriage lock to the locked position as described in Carriage Lock Release on page 30. Document Cover 1. Remove two screws (CBP, M3x8) from the rear of the scanner. 2.
EPSON Perfection 1250/1250 PHOTO Hooks Disassembly and Assembly 4.2.4 Carriage Assembly Removal Preparation: " Remove the document cover as described in Document Cover on page 31. " Release the carriage as described in Carriage Lock Release on page 30. 1. Remove one screw (CBB, M2.5x12), and then remove the driven pulley to loosen the timing belt. 2. Remove the CR Shaft from the holder. 3. Remove the timing belt from the carriage assembly. 4.
EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly R E A S S E M B L Y C A U T IO N When attaching the timing belt to the carriage assembly, Loctite screw lock should be used. When applying the Loctite screw lock, turn the carriage assembly upside down so that the Loctite screw lock does not get onto any other parts. FFC Figure 4-9. Carriage Assembly Removal (2) Figure 4-11. Remove FFC from Main Circuit Board Loctite Screw lock Figure 4-10.
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 on page 31. " Remove the upper cover as described in Upper Cover Removal on page 31. " Release the carriage as described in Carriage Lock Release on page 30. Connector " Remove the carriage assembly as described in Carriage Assembly Removal on page 32. 1.
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 on page 31. " Remove the upper cover as described in Upper Cover Removal on page 31. " Release the carriage as described in Carriage Lock Release on page 30. 1. Gently slide the carriage assembly forward until the main circuit board shield plate can be seen. 2.
EPSON Perfection 1250/1250 PHOTO Carriage Cable Connector Disassembly and Assembly CR Motor Connector 4.2.7 Control Panel Board Removal Preparation: " Remove the document cover as described in Document Cover on page 31. " Remove the upper cover as described in Upper Cover Removal on page 31. 1. Disconnect the cable from CN1, disengage the two hooks, and then remove the control panel board. Hooks Control Panel Connector Figure 4-17. Main Circuit Board Removal Control Panel Board Figure 4-18.
EPSON Perfection 1250/1250 PHOTO Disassembly and Assembly Control Panel Board Connector Figure 4-19.
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5 CHAPTER MAINTENANCE
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 images. ! Document Glass Clean with a soft, dry cloth. If necessary, you may use a neutral detergent, and then wipe it dry. Figure Lubrication Points Lubrication 5-1 Drive pulley shaft G-26 (1.0x3mm) 5-2 Tensioning pulley shaft G-26 (1.0x3mm) 5-3 CR shaft G-26 (1.0x3mm) ! Outer Case Clean with a slightly moistened cloth.
EPSON Perfection 1250/1250 PHOTO Maintenance Tensioning Pully Shaft Figure 5-2. Lubrication Point CR Shaft Figure 5-3.
6 CHAPTER APPENDIX
EPSON Perfection 1250/1250 PHOTO 6.1 Specifications Appendix 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.
EPSON Perfection 1250/1250 PHOTO Appendix 6.1.2 Basic TPU specifications 17.2 inches (438mm) 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” (W) x 5.7” (D) x 2.2” (H) 88 (W) x 145 (D) x 56 (H) mm Weight Approx. 0.66 pounds (0.3 kg) 6.1.3 Electrical specifications Scanner electrical characteristics Figure 6-1. Scanner Dimensions 2.
EPSON Perfection 1250/1250 PHOTO Appendix 6.1.7 Documents TPU electrical characteristics " Rated input voltage 15 V DC " Rated power supply Operation: Average 4 W Standby: Average 0 W " Rated input current Reflective documents 0.3 A Smooth surfaced documents Transparent documents Negative and positive films can be scanned using the separate transparency unit 6.1.
EPSON Perfection 1250/1250 PHOTO 6.2 Interface Specifications Appendix Connector B receptacle x 1 This scanner is equipped with a standard USB interface as described below. 6.2.1 USB Interface The scanner has the following configuration specifications. . Device Max. packet size or end point 0: 8 bytes Vendor ID: 0x04B8 Product ID: 0x010F No.
EPSON Perfection 1250/1250 PHOTO Appendix 6.3 Control Codes 6.3.1 Scanner Connection Diagram The command level for this scanner is ESC/I-D2. The commands supported by the scanner are shown in the following table. The scanner connection diagram is shown below. Table 6-1.
EPSON Perfection 1250/1250 PHOTO Appendix 6.3.2 Connector Summary Table 6-4. Main Circuit Board CN2 Connectors used in the scanner are listed below. For their pin assignments, refer to the tables listed in the right-hand column. Table 6-2. Connector Summary Board Connector Function No. of Pins Ref.
EPSON Perfection 1250/1250 PHOTO Appendix Table 6-8. Main Circuit Board CN6 Pin No. Signal I/O 10 HP O Pin No. Signal I/O 11 +15V O 1 +15V O 12 PM–SW4 O 2 TPU_DETECT I 13 PM–SW3 O 3 NC — 14 PM–SW2 O 4 GND — 15 PM–SW1 O 16 +5V O 17 DETECT O 18 OP–LED I 19 ERR–LED I 20 GND — 21 +Data I/O Pin No. Signal I/O 22 –Data I/O 1 +25V O 23 TPU I 2 INV–GND — Table 6-9. CCD Circuit Board CN2 Pin No. Signal I/O 1 +LSV O 2 GND — Table 6-10.
EPSON Perfection 1250/1250 PHOTO Appendix 6.4 Circuit Diagram The following pages show the circuit diagrams for the scanner's control circuits.
EPSON Perfection 1250/1250 PHOTO Appendix Figure 6-4.
EPSON Perfection 1250/1250 PHOTO Appendix Figure 6-5.
EPSON Perfection 1250/1250 PHOTO Appendix 6.5 Parts List and Exploded Diagrams Table 6-11. Parts List Part No. Table 6-11. Parts List Part No. Part Name Part Name 503 PULLEY,DRIVE 504 PULLEY,DRIVEN 100 MAT,COVER,DOCUMENT 505 SHIELD,BASE 101 HOUSING,LOWER 506 SHIELD,VERTICAL 102 COVER,DOCUMENT 507 SHIELD,BASE,BOARD 103 LOCK,CARRIAGE 508 SHIELD,REAR 104 FOOT 509 SHIELD,FRONT 105 DOUBLE SIDED TAPE,305X10 510 HOLDER ASSY.
EPSON Perfection 1250/1250 PHOTO Appendix 102 106 The parts to which no reference number is assigned will not be available as after-sale service parts. 512 100 108 108 107 505 500 200 105 511 507 508 202 510 506 201 400 103 401 501 509 502 101 503 513 504 104 GT-7200U/PERFECTION 1250 No.01 Rev.01 10328 Figure 6-6.
EPSON Perfection 1250/1250 PHOTO Appendix The parts to which no reference number is assigned will not be available as after-sale service parts. 03 01 02 GT-7200U/PERFECTION 1250 No.02 Rev.01 10328 Figure 6-7.
EPSON Perfection 1250/1250 PHOTO Appendix 800 801 802 PERFECTION 1250 PHOTO No.03 Rev.01 10328 Figure 6-8.
