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Epson Stylus DX3850 - User Manual

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

Questions and Answers

  • D
    Devon MedinaAug 4, 2025
    What to do if LD Roller cannot pick up paper in Epson Stylus DX3850 Printer?
    • M
      Marissa MedinaAug 4, 2025
      If your Epson Printer's LD Roller can't pick up paper, even though it rotates correctly, try setting a cleaning sheet in the ASF Unit upside down. Then, holding the top edge, try to load the paper from the Printer driver. Alternatively, reassemble the Compression Spring 2.51 between the ASF Frame and the Hopper.
  • P
    pkellyAug 8, 2025
    What to do if Epson Stylus DX3850 SPC does not perform the printing operation?
    • C
      Charles Adams Jr.Aug 8, 2025
      If the SPC does not perform the printing operation and an error is indicated with LEDs and STM3, replace the ink cartridge with a brand-new one.
  • T
    Thomas WhiteAug 12, 2025
    What to do if the leading edge of paper doesn't go through between the EJ Roller Unit and the Star Wheel in Epson Printer?
    • J
      Joshua RobertsAug 12, 2025
      If the leading edge of the paper doesn't go through between the EJ Roller Unit and the Star Wheel on your Epson Printer, try reassembling the EJ Frame Unit correctly or reassembling the Paper Guide Front Unit correctly.
  • C
    Charles WoodsAug 17, 2025
    What to do if Epson Printer SPC does not perform the initial ink charge?
    • G
      Grant BullockAug 17, 2025
      If the SPC does not perform the initial ink charge and an error is indicated with LEDs and STM3, replace the ink cartridge with a brand-new one or set the proper destination by using Adjustment Program.
  • L
    Laura JohnstonAug 21, 2025
    What to do if Epson Printer SPC does not perform the ink replacement CL?
    • J
      Jeffrey StephensAug 21, 2025
      If the SPC does not perform the ink replacement CL and an error is indicated with LEDs and STM3, replace the ink cartridge with a brand-new one.
  • D
    dcoleAug 26, 2025
    What to do if a communication error is indicated with STM3 in Epson Stylus DX3850 Printer?
    • R
      Rickey HowardAug 26, 2025
      If a communication error is indicated with STM3 when any printer job is sent to the SPC, connect the USB Cable to the SPC and the PC, use the Adjustment Program to write the correct value to the EEPROM address, or connect the Panel FFC to the CN12 on the Main Board.
  • C
    Christopher WatersAug 30, 2025
    How to fix SPC when it does not operate at all when turning on the power in Epson Stylus DX3850?
    • N
      nalvarezAug 30, 2025
      If the SPC does not operate at all when turning on the power, connect the Panel FFC to CN1 on the Panel Board, replace the Panel FFC with a new one, or replace the Panel Board with a new one.

Summary

Chapter 1 PRODUCT DESCRIPTION

1.1 Overview

Provides a general overview of the printer's functions, including printer, scanner, and standalone copy capabilities.

1.2 Specifications

Details the technical specifications of the printer, scanner, and common components.

1.3 Interface

Describes the printer's interface options, focusing on the USB interface standards and pin assignments.

1.4 Stand-alone Copy

Explains the standalone copying functions, including basic specifications, copy speed, and layout configurations.

1.5 Control Panel

Details the control panel's buttons, indicators, operations, and status indications.

Chapter 2 OPERATING PRINCIPLES

2.1 Overview

Introduces the operating principles of the printer mechanism, scanner mechanism, and electrical circuit boards.

2.2 Printer Mechanism

Explains the printer's mechanical components, including the print head, carriage, paper feed, and ink system.

2.3 Scanner Mechanism

Describes the scanner's mechanical operation, focusing on the carriage mechanism and its movement.

2.4 Electrical Circuit Operating Principles

Explains the operating principles of the printer's electrical circuits, including main board and power supply.

Chapter 3 TROUBLESHOOTING

3.1 Overview

Introduces troubleshooting procedures, including unit-level repair and error indication explanations.

3.2 Error Indications and Fault Occurrence Causes

Details error indications via LEDs and STM3 messages, along with their fault occurrence causes.

3.3 Troubleshooting

Provides detailed check points and remedies for various phenomena like communication, ink, paper, and fatal errors.

3.3.1 Superficial Phenomenon-Based Troubleshooting

Explains fault locations for issues like abnormal noise and poor print quality not indicated by LEDs or STM3.

Chapter 4 DISASSEMBLY;ASSEMBLY

4.1 Overview

Introduces disassembly procedures for main printer components, including precautions and tools.

4.1.1 Precautions

Lists safety and handling precautions required for disassembly and assembly procedures.

4.1.2 Tools

Lists the specific tools recommended for disassembly and assembly to avoid damage.

4.1.3 Work Completion Check

Provides a checklist to confirm all service works are completed properly before returning the printer.

4.2 Caution regarding Assembling;Disassembling of the Printer Mechanism, and How to Ensure of Quality on Re-assembled Product

Provides critical cautions for reassembly and methods to ensure quality of reassembled products.

4.3 Disassembly Procedures

Presents a flowchart outlining the step-by-step disassembly procedures for printer components.

4.4 Printer Section

Details the disassembly procedures for various parts within the printer section.

4.5 Scanner Section

Details the disassembly procedures for various parts within the scanner section.

Chapter 5 ADJUSTMENT

5.1 Overview

Provides an overview of adjustments required after printer disassembly and assembly for repair or service.

5.1.1 Required Adjustments

Lists adjustments needed based on specific parts replaced during service.

5.2 Adjustment by Using Adjustment Program

Explains procedures for adjustments performed using the dedicated adjustment software program.

5.3 Adjustment Except Adjustment Program

Details adjustments that can be performed without using the adjustment software program.

Chapter 6 MAINTENANCE

6.1 Overview

Provides information and procedures to maintain the printer in its optimal condition.

6.1.1 Cleaning

Describes cleaning procedures for printer components like exterior parts, document glass, and rollers.

6.1.2 Service Maintenance

Explains actions for maintenance request errors, including print head cleaning and status monitor indications.

6.1.3 Lubrication

Details lubrication points, types, and amounts of grease required for printer mechanisms.

Chapter 7 APPENDIX

7.1 Connector Summary

Provides a summary of connectors for the main board and power supply board, including pin assignments.

7.2 Exploded Diagram

Contains exploded diagrams illustrating the assembly of printer components.

7.3 Parts List

Lists all part codes and their corresponding names for the printer model.

7.4 Electrical Circuits

Refers to the location of electrical circuit diagrams for the main control, power supply, and panel boards.

Epson Stylus DX3850 Specifications

General IconGeneral
Print TechnologyInkjet
Print Resolution5760 x 1440 dpi
Scanner TypeFlatbed
Scan Resolution1200 x 2400 dpi
ConnectivityUSB
Copy Resolution600 x 600 dpi
Ink Cartridge Configuration4 individual cartridges (Black, Cyan, Magenta, Yellow)
InterfaceUSB 2.0
Input Paper Capacity100 sheets
Output Paper Capacity50 sheets
Paper SizesA4, A5, B5, Letter, Legal, Envelopes
FunctionsPrint, Scan, Copy
Operating SystemsApple Mac OS X 10.2.8 or later
Weight5.9 kg
Media TypePlain paper, Envelopes, Photo paper
Copy Speed (Color)Up to 4 cpm

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