Epson Stylus CX3700 Service Manual

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Summary of Contents:

[Page 1] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/ CX3810/DX3800/DX3850 Color Inkjet Printer SEIJ05-012 SERVICE MANUAL ...

[Page 2] Epson STYLUS CX3700 SERIES

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 the prior written permission ...

[Page 3] Epson STYLUS CX3700 SERIES

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 injury. Great caution should be...

[Page 4] Epson STYLUS CX3700 SERIES

About This Manual This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer. The instructions and procedures included herein are intended for the experienced repair techni...

[Page 5] Epson STYLUS CX3700 SERIES

Revision Status Revision Issued Date Description A Aug 10, 2005 First Release ...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A 6 CONTENTS Chapter 1 PRODUCT DESCRIPTION 1.1 Overview ............................................................................................................... 9 1.1.1 Features.....

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A 7 Chapter 4 DISASSEMBLY/ASSEMBLY 4.1 Overview ............................................................................................................. 93 4.1.1 Precautions...........

[Page 8] Epson STYLUS CX3700 SERIES

CHAPTER 1 PRODUCT DESCRIPTION ...

[Page 9] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Overview 9 1.1 Overview This unit features 3-in-1 functionality (computer-connected printer, scanner, and stand- alone copy machine) and is designed for home/perso...

[Page 10] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 10 1.2 Specifications 1.2.1 Printer specifications This section covers specifications of the printer. 1.2.1.1 Physical Specification  Weight �...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 11 Note "*": Except Draft Printing  Control Code  ESC/P Raster command  EPSON Remote command  ESC/P-R Level-1 command  Inter...

[Page 12] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 12  Envelopes Note *1: Check that the flap is on the long edge and can be folded.  Exclusive papers Quality: EPSON Exclusive paper Note *1: Not...

[Page 13] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 13 1.2.1.5 Printing Area  Cut sheet (standard printing)  Printable area The print quality is guaranteed for the print area above the 3 mm bott...

[Page 14] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 14 Figure 1-3. Printable Area Cut Sheet (Standard Printing)  Cut sheet (border-free printing)  Printable area For paper width (PW) and paper ...

[Page 15] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 15 Figure 1-4. Printable Area for Cut Sheet (Border-free Printing) Table 1-11. Applicable Paper/Printing Area (For Copying) Paper Type Size Left Ov...

[Page 16] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 16  Envelopes  Printable area For paper width (PW) and paper length (PL), refer to “1.2.1.4 Paper Support” (p.11). Refer to the following ...

[Page 17] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 17 1.2.1.6 Ink Cartridge Specification  Type/color: EPSON-brand special ink cartridges  Print Capacity  Black Ink Cartridge: TBD pages/A...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 18 1.2.2 Scanner Specifications This section covers specifications of the scanner. 1.2.2.1 Basic Specifications  Product type: Flatbed color ima...

[Page 19] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 19 1.2.3 Common 1.2.3.1 Electric Specification  Primary power input Note 1: This product complies with the “Energy Star” standards. 2: If th...

[Page 20] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Specifications 20 1.2.3.4 Acoustic Noise  Noise level Approx. 45 dB (according to ISO7779 when for copying) 1.2.3.5 Safety Standards: EMC 1.2.3.6 CE Marking �...

[Page 21] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Interface 21 1.3 Interface The EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 provides the following interface. 1.3.1 USB Interface  Standards  “...

[Page 22] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Stand-alone Copy 22 1.4 Stand-alone Copy 1.4.1 Basic Specifications 1.4.1.1 Supported Paper Sizes, Types and Qualities Note *1: The quality of draft copy is not ...

[Page 23] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Stand-alone Copy 23 Note *1: Actual is the state that “Fit to page” is not selected. *2: “Fit to page” automatically sets the enlarge/reduce scale so that t...

[Page 24] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Stand-alone Copy 24 1.4.4 Relation between Original and Copy 1.4.4.1 Standard Copy The following table shows the relative positioning of the original and copy. No...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Stand-alone Copy 25 1.4.4.2 BorderFree Copy The following table shows the relative positioning of the original and copy. Note : Refer to “1.2.1.4 Paper Support�...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Stand-alone Copy 26 1.4.4.3 Small Margins Copy The following table shows the relative positioning of the original and copy. Note : Refer to “1.2.1.4 Paper Suppor...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 27 1.5 Control Panel 1.5.1 Buttons The control panel contains following seven buttons, which are used to set and execute various operations. All o...

[Page 28] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 28 Figure 1-13. Control Panel (For EAI) Figure 1-14. Control Panel (For Europe and Asia) Power Button Ink Button Paper Size Button Fit to Page Butt...

[Page 29] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 29 1.5.3 Operations 1.5.3.1 Stand-alone Copy The functions of this unit caused by each button in stand-alone copy mode are described in the followin...

[Page 30] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 30 1.5.3.2 Low Power Panel Mode Without any panel operation for 15 minutes while the printer and scanner unit are in standby status, this unit moves...

[Page 31] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 31 1.5.4 Printer Condition and Panel Status Note : “---”: No change Blink: 0.5sec. On + 0.5sec. Off repetition Blink 2: 0.2sec. On + 0.2sec. Off ...

[Page 32] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 32 Note"*":Returns to the preset number when the copying is finished. Paper jam — Blink Off — — — 7 Reset request/Stop request/Job c...

[Page 33] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 33 1.5.4.1 Error Status  Mechanical fatal error This error occurs when one of the followings happens. • The carriage could not reco gnize the ho...

[Page 34] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A PRODUCT DESCRIPTION Control Panel 34 1.5.6 Printer Initialization (T.B.D) There are four kinds of initialization method, and the following explains each initialization. 1. Power-on in...

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CHAPTER 2 OPERATING PRINCIPLES ...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Overview 36 2.1 Overview This section describes the operating principles of the Printer Mechanism, Scanner Mechanism and Electrical Circuit Boards.  Main Boar...

[Page 37] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 37 2.2.2 Print Head The Print Head is the same D2-CHIPS type as the previous SPC, and makes it possible to perform economy dot printing and var...

[Page 38] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 38  Ink Cavity The ink absorbed from the Ink Cartridge goes through the filter and then is stored temporarily in this tank called “ink cavi...

[Page 39] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 39 2.2.3 Carriage Mechanism The Carriage Mechanism consists of Carriage Unit (including the Print Head, CR Encoder Board and PW Sensor), CR Mot...

[Page 40] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 40 2.2.3.2 Carriage Home Position Detection 1. Current position temporary detection sequence determines if the carriage is in the carriage lock...

[Page 41] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 41 2.2.4 Paper Loading/Feeding Mechanism The following DC motor controls the Paper loading/feeding mechanism on this printer. The drive of the P...

[Page 42] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 42 For your reference, the top or the end of a paper is usually detected with the PE Sensor. In case that the PE Sensor cannot detect the top of...

[Page 43] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 43 Figure 2-7. ASF paper loading sequence (Step 1, 2) When the PF Motor pinion gear rotates CCW direction (right side view), the Change Lever...

[Page 44] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 44 Figure 2-8. ASF paper loading sequence (Step 3, 4) The PF Motor pinion gear rotates CCW direction (right side view), and the drive of the ...

[Page 45] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 45 2.2.4.2 Paper Feeding Mechanism The Paper feeding mechanism consists of PF Motor, PF Roller, EJ Roller, PE Sensor, PF Encoder and PF Scale ...

[Page 46] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 46 2.2.5 Ink System Mechanism The Ink System Mechanism consists of Pump mechanism with Carriage lock mechanism and Capping mechanism with Wiper...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 47 2.2.5.1 Capping Mechanism The Capping mechanism covers the Print Head with the Cap to prevent the nozzle from increasing viscosity when the ...

[Page 48] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 48 2.2.5.2 Pump Unit Mechanism The PF Motor also controls the Pump Unit mechanism (including the Change Lever) as well as the Paper loading/fee...

[Page 49] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 49 2. Carriage lock operation by the Change Lever Unlike the previous printer (Stylus COLOR 680), this printer does not have the Carriage Lock L...

[Page 50] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Printer Mechanism 50 Independently of the printing path after the previous CL, perform manual CL from CL1 to CL3 in order if the cumulative printing timer counter...

[Page 51] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Scanner Mechanism 51 2.3 Scanner Mechanism The Scanner Mechanism of Stylus CX3700/CX3800/CX3805/CX3810/DX3800/ DX3850 is constructed of a Scanner Carriage Unit, S...

[Page 52] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Scanner Mechanism 52 2.3.1.2 Scanner Carriage Unit Movement Overview Scanning image is performed in the main scan direction (=1 line) by the CCD sensor and in th...

[Page 53] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 53 2.4 Electrical Circuit Operating Principles The electric circuit of the Stylus CX3700/CX3800/CX3805/CX3810/DX3800/ DX38...

[Page 54] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 54 2.4.2 C612 Main Board The logic circuit of the C612 Main Board is composed of the follows;  Logic line (CPU-ASIC 2 i...

[Page 55] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 55 Figure 2-18. Block Diagram For The C612 Main Board CPU-ASIC 2 in 1 (IC8) Data Address SDRAM (IC6) Flash-ROM (IC5) RTC...

[Page 56] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 56 2.4.2.2 Print Head Driver Circuit The Print Head driver circuit consists of the following two components:  Head comm...

[Page 57] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 57 2.4.2.3 Motor Driver Circuit CR/PF Motor drive circuit The motor driver IC (IC9) on the Main board drives CR/PF Motor. ...

[Page 58] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 58 2.4.2.4 Combination Circuit This printer differs from previous models by using a combination IC that integrates the re...

[Page 59] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 59 2.4.2.5 Sensor Circuit CPU (IC8) on the Main Board monitors the status of the printer by several sensors. However, unl...

[Page 60] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A OPERATING PRINCIPLES Electrical Circuit Operating Principles 60 The block diagram for the sensor circuit is shown below. : Figure 2-22. Sensor Circuit Diagram CN4 Scanner HP Sensor C...

[Page 61] Epson STYLUS CX3700 SERIES

CHAPTER 3 TROUBLESHOOTING ...

[Page 62] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Overview 62 3.1 Overview This chapter describes unit-level troubleshooting. Refer to the flowchart in this chapter to identify the defective unit and perform componen...

[Page 63] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Error Indications and Fault Occurrence Causes 63 Note : “–” : No change Table 3-3. Error Indications and Fault Occurrence Causes Printer Status Communication err...

[Page 64] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Error Indications and Fault Occurrence Causes 64 Note : “–” : No change Table 3-4. Error Indications and Fault Occurrence Causes Printer Status Ink out or No Ink...

[Page 65] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Error Indications and Fault Occurrence Causes 65 Note : “–” : No change Table 3-5. Error Indications and Fault Occurrence Causes Printer Status Maintenance reque...

[Page 66] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 66 3.3 Troubleshooting You can identify the troubles by using the checklist in this section after confirming the LED indication on the SPC. If you conn...

[Page 67] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 67 • Power on •Anywhere When turning on the power, the SPC does not operate at all. PS Board Unit 1. Check if the PS Board Connector Cable is conne...

[Page 68] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 68 Table 3-7. Check point for the error before the initial ink charge according to each phenomenon Occurrence timing CR position Detailed phenomenon ...

[Page 69] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 69 Table 3-8. Check point for the Double feed error according to each phenomenon Occurrence timing CR position Detailed phenomenon Defective unit/pa...

[Page 70] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 70 Table 3-9. Check point for the paper out error according to each phenomenon Occurrence timing CR position Detailed phenomenon Defective unit/part...

[Page 71] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 71 • Operation •– The drive of the PF Motor is not transmitted to the LD Roller Shaft. Holder Shaft Unit 1. Check if the Extension Spring 0.143 d...

[Page 72] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 72 • Operation •– The drive of the PF Motor is not transmitted to the LD Roller Shaft. Ink System Unit 1. Check if the Compression Spring 2.36 do...

[Page 73] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 73 Table 3-10. Check point for the No ink cartridge/CSIC error/Incorrect ink cartridge according to each phenomenon Occurrence timing CR position Det...

[Page 74] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 74 Table 3-11. Check point for the paper jam error according to each phenomenon Occurrence timing CR position Detailed phenomenon Defective unit/par...

[Page 75] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 75 • Operation •Outside HP Paper is being resent during paper feeding operation. ASF Unit 1. Check if the Extension Spring Retard operates correctl...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 76 • Operation •– The leading edge of paper does not go through between the EJ Roller Unit and the Star Wheel. EJ Frame Unit** 3. Check if the S...

[Page 77] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 77 Table 3-12. Check point for the Fatal error according to each phenomenon Occurrence timing CR position Detailed phenomenon Defective unit/part na...

[Page 78] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 78 • Power on •Anywhere The Scanner Unit does not initialize when the power is turned on. Scanner HP Sensor 1. Check if the Scanner HP Sensor Conne...

[Page 79] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 79 • Power on •Anywhere The Scanner Unit does not initialize when the power is turned on. Scanner Carriage Unit 1. Check if the Scanner Carriage U...

[Page 80] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 80 • Power on •Anywhere When turning on the power, the Carriage Unit collides to the Change Lever located to the front side of the printer. PF Mot...

[Page 81] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 81 • Power on •Anywhere When turning on the power, the Carriage Unit collides to the right side of the Main Frame. CR Scale 1. Check if the CR Sca...

[Page 82] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 82 • Power on •Anywhere The eject rollers are rotating at high speed when power is turned on. (For about 1 cycle.) PF Scale / Ma in Board Unit 1....

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 83 • Operation •Anywhere The Carriage Unit climbs over the Slider Lock Lever set to the wiping position and the Carriage Unit collides to its lev...

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EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 84 3.3.1 Superficial Phenomenon-Based Troubleshooting This section explains the fault locations of the error states (print quality and abnormal noise) ...

[Page 85] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 85 Table 3-14. Check point for the abnormal noise Occurrence timing CR position Detailed phenomenon Defective unit/part name Check point Remedy •A...

[Page 86] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 86 Table 3-16. Check point for the poor printing quality Print Quality State Detailed phenomenon Defective unit/part name Check point Remedy • Dot ...

[Page 87] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 87 • White streak / abnormal discharge Ink is ejected to the Cap from the Print Head, but printing is not done at all after cleaning or ink change...

[Page 88] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 88 • White streak/ color unevenness occurrence Vertical banding appears against the CR movement direction. And, it looks like uneven printing. [Not...

[Page 89] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 89 • White streak/ color unevenness occurrence Micro banding appears horizontally against the CR movement direction and it appears with the same wi...

[Page 90] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 90 •Print start position slip The printing operation is correctly performed. But, the top margin is insufficient than usual one. Holder Shaft Unit ...

[Page 91] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A TROUBLESHOOTING Troubleshooting 91 • Ink stain of paper Ink sticks to other than the print area of the paper, resulting in contamination Print Head 1. Check if the Print Head Cover ...

[Page 92] Epson STYLUS CX3700 SERIES

CHAPTER 4 DISASSEMBLY/ASSEMBLY ...

[Page 93] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Overview 93 4.1 Overview This section describes procedures for disassembling the main components of the Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850. Unless ...

[Page 94] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Overview 94 4.1.3 Work Completion Check If any service is made to the printer, use the checklist shown below to confirm all works are completed properly and the ...

[Page 95] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Caution regarding Assembling/Disassembling of the Printer Mechanism, and How to Ensure of Quality on Re-assembled Product 95 4.2 Caution regarding Assembling/Disa...

[Page 96] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Disassembly Procedures 96 4.3 Disassembly Procedures The flowchart below shows step-by-step disassembly procedures. When disassembling each unit, refer to the pag...

[Page 97] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Printer Section 97 4.4 Printer Section 4.4.1 Document Cover/Document Cover Mat/ASF Cover Figure 4-2. Removing Document Cover/Document Cover Mat/ ASF Cover  P...

[Page 98] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Printer Section 98 4.4.2 Paper Support Assy.  External view Figure 4-3. Removing Paper Support Assy.  Part/ Unit that should be removed before removing Pap...

[Page 99] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Printer Section 99 4.4.4 Scanner Unit  External view (1) Figure 4-5. Removing Scanner Unit  Part/Unit that should be removed before removing Scanner Unit ...

[Page 100] Epson STYLUS CX3700 SERIES

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A DISASSEMBLY/ASSEMBLY Printer Section 100 4.4.5 Panel Unit  External view Figure 4-7. Removing Panel Unit  Part/Unit that should be removed before removing Panel Unit Document ...