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Epson EPL-N2050 Service Manual

Epson EPL-N2050 Service Manual

Monochrome laser printer
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SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
Monochrome Laser Printer
EPSON EPL-N2050
®
SEPG99009

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Summary of Contents for Epson EPL-N2050

  • Page 1 SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL Monochrome Laser Printer EPSON EPL-N2050 ® SEPG99009...
  • Page 2 The contents of this manual are subject to change without notice. n All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
  • Page 3 2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

  • Page 4: Product Description

    PREFACE This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPL-N2050. The instructions and procedures included herein are intended for the experienced repair technicians, and close attention should be given to the precautions on the preceding page. Chapters are organized as follows: CHAPTER 1.
  • Page 5 Revision Status Revision Date of Issue Description December 2 , 1999 First Release Parts lists and exploded diagrams have been revised. January 13, 2000 Disassembly procedures have been partly changed.

  • Page 6: Table Of Contents

    EPSON EPL-N2050 Revision B Contents Chapter 1 Product Description Chapter 2 Operating Principles 1.1 Features ....................10 2.1 Overview ....................36 2.1.1 Electrophotographic Printing ............. 36 1.2 Specifications ..................12 2.1.2 Paper Path ..................38 1.2.1 Controller Specifications ............. 12 2.1.3 Drive Flow ..................
  • Page 7 EPSON EPL-N2050 Revision B 3.4.10 Black Spots ................. 82 4.2.24 Feeder Assy ................129 3.4.11 Ghost Print ................. 83 4.2.25 Roll Assy .................. 131 3.4.12 Dirty Background ............... 84 4.2.26 PWBA Feeder ................132 3.4.13 Skewed Image ................85 4.2.27 Clutch Assy Feed ..............134 3.4.14 Damaged Print ................
  • Page 8 EPSON EPL-N2050 Revision B 4.2.64 Chute Assy Exit ................ 181 7.1.3 P/J Location Table and Map ............. 226 4.2.65 CRU Top Guide Assy ............... 182 7.1.4 Signal Information ..............231 4.2.66 ROS Assy .................. 183 7.2 Board Component Layout ..............240 4.2.67 Gear Assy Drive ...............

  • Page 9: Chapter 1 Product Description

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

  • Page 10: Features

    1.1 Features CONTROLLER FEATURES High-speed controller VR4310 / 166.7MHz CPU. EPL-N2050 is a non-impact page printer, using the laser and electro- photographic technology. The following shows features of the printer. 16 MB RAM as standard. This manual also contains specifications for the Optional Units: Duplex Unit, Expandable to 256 MB using commercially available SDRAM DIMM.
  • Page 11 EPSON EPL-N2050 Revision B 2. Installed Utility: Web Assist 3. Rewriting of Flash ROM DIMMs Flash ROM DIMMs in Slot A and the program slot can be rewritten from any I/F (Not open to users except for Slot A). When downloading NLSP, it is written using Slot A, and it is inserted into Slot B when used.

  • Page 12: Specifications

    EPSON EPL-N2050 Revision B 1.2 Specifications HOST INTERFACES Standard Parallel: IEEE 1284 compliant, bi-directional, B-type 1.2.1 Controller Specifications connector, compatibility, nibble, ECP Ethernet: 10BaseT/100BaseTX RS232C serial interface Option Type B I/F 1 slot RISC CPU VR4310 166.7MHz Token Ring 1 slot (dealer option) Type B and Token Ring cannot be used together.

  • Page 13: Engine Specifications

    EPSON EPL-N2050 Revision B 1.2.2 Engine Specifications First Printing Time Printing Method Electrophotographic method using scanning Table 1-2. First Printing Time semiconductor laser beam and dry one- Size MP Tray (sec) Cassette 1 (sec) Cassette 2 (sec) Cassette 3 (sec) component toner.
  • Page 14 EPSON EPL-N2050 Revision B Paper Supply Maximum Paper Supply Capacity* Table 1-3. Paper Supply Table 1-4. Max. Paper Supply Capacity Paper Supply Paper Combination MP Tray Cassette 1 Cassette 2* Cassette 3* Total Capacity Paper Size Method Thickness 100 sheets...
  • Page 15 EPSON EPL-N2050 Revision B Paper Size Table 1-5. Paper Size (continued) Table 1-5. Paper Size Cassette Duplex Paper Type Paper Size Japan Abroad Tray 1, 2, 3* Printing Cassette Duplex Paper Type Paper Size Japan Abroad Tray 1, 2, 3* Printing 104.8 x 241.3mm...
  • Page 16 EPSON EPL-N2050 Revision B Consumables Imaging Cartridge Dimension Applicable Paper Size to Feed: Main Unit: 422 (W) x 439 (D) x 413 (H) mm Table 1-6. Applicable Paper Size to Feed Optional Units: Paper Width Paper Length Table 1-8. Optional Unit Dimension 76.2-215.9mm...

  • Page 17: Process Specification

    EPSON EPL-N2050 Revision B Power Supply 1.2.3 Process Specification 100V Model: 100V/120V 90-132V (50-60Hz ±3Hz) Method Electrophotographic method using dry one- 200V Model: 220V/240V 198-264V (50-60Hz ±3Hz) component developing. Power Consumption* Light Source Laser Diode Table 1-9. Power Consumption Photoconductor Unit OPC (Organic Photo Conductor) Drum...

  • Page 18: Paper Specification

    EPSON EPL-N2050 Revision B 1.2.4 Paper Specification - Sheets already printed on other color or black/white laser printers or photocpiers. Paper Type - Sheets of paper stuck together. Standard Paper Xerox 4024 (75 g/m ), RX-80 (80 g/m Note 3 When printing on some postcards with pre-printed pictures, the...
  • Page 19 EPSON EPL-N2050 Revision B Printing Area Guaranteed printing area: Entire paper area except for a 4mm margin at each edge (see the figure shown below). (a1, a2, c1, c2 = 4mm) Guaranteed Printing Area Figure 1-2. Printing Area Product Description...

  • Page 20: Sensors

    EPSON EPL-N2050 Revision B 1.2.5 Sensors Table 1-12. Sensors Unit Detected Item Detection Method Comments Table 1-12. Sensors Duplex Unit Automatic detection Unit Detected Item Detection Method Comments Unit mounted/unmounted by connector. Mounted/unmounted Exist Optional Unit Automatic detection Paper mounted/unmounted by connector.

  • Page 21: Reliability, Durability, Serviceability

    EPSON EPL-N2050 Revision B 1.2.6 Reliability, Durability, Serviceability Printing Start Position Accuracy Main Scanning Direction: ±2.0mm MPBF 200,000 pages Note: This figure indicates the mean pages until a failure requiring Sub Scanning Direction: ±2.5mm part replacement or failure unrecoverable by user occurs.

  • Page 22: Operating Conditions

    EPSON EPL-N2050 Revision B 1.2.7 Operating Conditions 1.2.8 Storage Environment Temperature and Humidity Table 1-17. Temperature & Humidity Table 1-16. Temperature & Humidity Condition Main Unit Condition Main Unit Normal condition 0-35°C 0-35°C (12 months) Operation 5-35°C Temperature Temperature High temperature 35-40°C...

  • Page 23: Electrical Characteristics

    EPSON EPL-N2050 Revision B 1.2.9 Electrical Characteristics Leak Current 0.25mA max. (100V model, 100V input) The following items do not apply to the Optional Units. 3.5mA max. (100V model, 120V input) AC Line Noise 3.5mA max. (200V model) Pulse Width:...

  • Page 24: Applicable Standards And Regulations

    EPSON EPL-N2050 Revision B 1.2.10 Applicable Standards and Regulations Others Toner No effects on the human body (conforming The engine specification meets the following standards and regulations. to OSHA, TSCA, EINECS, Labor Safety Law, Depending on the destination, some standards and regulations apply to the CSCL).

  • Page 25: Consumables

    EPSON EPL-N2050 Revision B 1.2.11 Consumables 1.2.12 Maintenance Specifications Table 1-22. Maintenance Table 1-21. Consumables Possibility of User Maintenance Item Timing Maintenance by Maintenance Name Contents Life (Toner Consumption) Cleaning Transfer When an error • OPC Drum User Roller occured.

  • Page 26: External Dimension

    EPSON EPL-N2050 Revision B 1.2.13 External Dimension (mm) (mm) Figure 1-4. External Dimension with Optional Units Figure 1-3. External Dimension Product Description Specifications...

  • Page 27: Other Specifications

    Revision B 1.2.14 Other Specifications 1.2.15 Configuration The following settings can be configured in the EPL-N2050 controller. The 1.2.14.1 Setting Direction for Envelopes settings are made with jumper resistors, and they must be set at the factory. See Table1-24 for details of the jumper settings.

  • Page 28: Host Interface Specifications

    Revision B 1.2.16 Host Interface Specifications 1.2.16.1 Parallel Interface Specifications Interface Type: IEEE 1284 bi-directional high-speed interface The EPL-N2050 has the following host interfaces as standard. IEEE 1284 parallel interface Operation Modes: Compatibility, Nibble, ECP Ethernet interface Connector Type: 57RE-40360-830B (D7A) DDK or equivalent...
  • Page 29 CLS: PRINTER; HTTP) DES: ****; 4) AppleTalk (ELAP, DDP, ATP, PAP, AARP, NBP, ZIP, RTMP) CID: ****; 5) ENPC (EPSON Network Peripheral Control Protocol) When PS3 is installed: Connector Type: RJ45 MFG: ****; CMD: PJL, EJL, ESCPL2, ESCP9, PRPXL24-01, PCL, HPGL2-01,...
  • Page 30 EPSON EPL-N2050 Revision B Printer Name: Factory default setting is the same as Product Name. Entity Type: When Emulation is “Auto”: As shown in the table. Product Name: Product Name When Emulation is fixed: Entity Type of default Emulation and Emulation Type: See the table below.
  • Page 31 EPSON EPL-N2050 Revision B 1.2.16.4 Type B Interface Specification Emulation Type: When Emulation is “Auto”: This printer is equipped with a Type B option interface slot as standard. For details of the Type B option interfaces which can be used, refer to the page PS3 not started: AUTO (Emulation Type 1, 2, 3...)

  • Page 32: Control Panel

    (11) SelecType/Alt Switch Doubles with shift switch (12) (15) (12) Menu Select Switch (13) Item Select Switch (14) Value Select Switch (15) Enter Switch Continue Form Feed On Line SelecType Reset (11) (10) Figure 1-6. EPL-N2050 Control Panel Product Description Control Panel...

  • Page 33: One Touch Setting Functions

    EPSON EPL-N2050 Revision B 1.3.2 One Touch Setting Functions 1.3.3 Special Operation Functions The following table lists the one touch setting functions supported by this The following table lists the special operation functions supported by this printer. printer. The functions are not open to users except for the hexadecimal dump function, initialization of the remaining toner.

  • Page 34: Notes On Operation

    EPSON EPL-N2050 Revision B 1.4 Notes on Operation 1.4.1 Powering Off This printer has an internal non-volatile memory (EEPROM), and hard disk drive. If the printer is powered off during the process of writing to the non-volatile memory or hard disk drive, the writing operation cannot be guaranteed, and an error may occur the next time the printer is turned on.

  • Page 35: Chapter 2 Operating Principles

    C H A P T E R OPERATING PRINCIPLES...

  • Page 36: Overview

    Revision B 2.1 Overview 2.1.1 Electrophotographic Printing Like other EPSON page printers, the EPL-N2050 uses the electrophtographic This chapter explains functions and operating principles of the engine printing system combined with a semi-conductor laser beam scanning mechanism and the controller of the EPL-N2050.
  • Page 37 EPSON EPL-N2050 Revision B Shown below is the block diagram of the print cycle of the EPL-N2050. Refer to Chapter 2 of the EPL-N1600 Service Manual for detailed description of each step as the print cycle is basically the same.

  • Page 38: Paper Path

    EPSON EPL-N2050 Revision B 2.1.2 Paper Path There are three paths that a sheet of paper can follow during one print cycle. One path is taken if paper is fed from the paper cassette. Another path is taken if paper is fed from the Multiple-Bypass Feeder (MBF). The third path is taken if paper is fed from the optional Envelope Feeder Assy.

  • Page 39: Drive Flow

    EPSON EPL-N2050 Revision B 2.1.3 Drive Flow DRIVE TRANSMISSION TO THE ROLL ASSY MBF The Gear Assy Drive takes the mechanical energy that is created by the Motor The mechanical energy created by the Motor Assy Main is transmitted Assy Main and transmits it to four printer subsystems: the Clutch Assy Turn, through the Gear 14 to the Gear Pick Up that drives the Roll Assy MBF.
  • Page 40 EPSON EPL-N2050 Revision B DRIVE TRANSMISSION TO ROLL ASSY TURN DRIVE TRANSMISSION TO FEEDER ASSY The mechanical energy created by the Motor Assy Main is transmitted The mechanical energy created by the Motor Assy Main is transmitted through the Gear Assy Drive to the Clutch Assy Turn. When the Clutch Assy...
  • Page 41 EPSON EPL-N2050 Revision B DRIVE TRANSMISSION TO ROLL REGI RUBBER DRIVE TRANSMISSION TO DRUM AND BTR The mechanical energy created by the Motor Assy Main is transmitted The energy created by the Motor Assy Main is transmitted through the Gear through the Gear Assy Drive to the Clutch Regi that is located on the end of Assy Drive to the Drum Drive Gear that is located on the end of the Drum.
  • Page 42 EPSON EPL-N2050 Revision B DRIVE TRANSMISSION TO FUSER ASSY DRIVE TRANSMISSION TO EXIT COMPONENTS The mechanical energy created by the Motor Assy Main is transmitted The mechanical energy created by the Motor Assy Exit is transmitted through through the Gear Assy Drive to the Gear Idler of the Fuser Assy. The Gear small gears to the three Gears (Gear Exit 17).

  • Page 43: Main Component Function

    EPSON EPL-N2050 Revision B 2.1.4 Main Component Function This section explains the function of the printer’s major components. Covers Paper Cassette Paper Feeder Chute MBF P/H Assy Chute Trans & Fuser Exit Drive & Electrophotographics Frame & Size Sensor COVERS Lever and Latch Assies: Latches the Cover Assy Front to the printer frame.
  • Page 44 EPSON EPL-N2050 Revision B PAPER CASSETTE Cassette Assy: Holds various sizes of plain cut paper (Envelopes are fed by the optional Envelope Feeder Assy, and post cards are fed by the MBF). Adjust L and R of the Cassette Guides Assy to accommodate different sizes of paper.
  • Page 45 EPSON EPL-N2050 Revision B Actuator N/P: Actuates the Sensor Photo: No Pap 1. When paper is PAPER FEEDER out, this actuator will swivel down and shield the Sensor Photo: No Pap 1. Clutch Assy Turn: Consists of a gear and an electric clutch. This is located on the end of a shaft of the Roll Assy Turn.
  • Page 46 EPSON EPL-N2050 Revision B CHUTE MBF Roll Assy MBF: Consists of the Shaft Assy MBF, Roll Assy MBF and the Cam Pick Up MBF. This assy picks the paper from the Tray Assy MBF. Solenoid Pick Up: Controls the start and stop of the rotation of the Roll Assy MBF.
  • Page 47 EPSON EPL-N2050 Revision B P/H ASSY Sensor Photo: Regi Detects when a sheet of paper arrives at the Inlet and Chute Bottom Upper. The Sensor Photo: Regi is part of the components that are used to register the paper with the image on the drum.
  • Page 48 EPSON EPL-N2050 Revision B CHUTE TRANS & PAPER BTR Assy (Bias Transfer Roll): Transfers the toner image from the drum to the sheet of paper. The BTR applies a positive charge to the back of the sheet as it travels between the BTR and the surface of the drum.
  • Page 49 EPSON EPL-N2050 Revision B Fuser Assy: Uses heat and pressure to permanently fix the toner Sensor Exit: image onto the paper. Monitors when a sheet of paper passes the paper The Fuser Assy is made up of nine major components.
  • Page 50 EPSON EPL-N2050 Revision B EXIT Roll Assy Mid-1 Roll Assy Mid-2: Transports the paper from the Fuser Assy to the face-down output tray, or to the optional Shifter, Multibin Unit, or Duplex Assy. Gate Exit: Switches the paper exit path to either the face-down output tray, or to the optional Shifter or Multibin Unit, if installed.
  • Page 51 EPSON EPL-N2050 Revision B voltage value. The voltage is used as the feed-back DRIVE & ELECTROPHOTOGRAPHICS to control the speed of the motor. ROS Assy: The ROS (Raster Output Scanner) Assy is the laser The Scanner Motor is driven by a three-phase, full- and the scanning hardware.
  • Page 52 EPSON EPL-N2050 Revision B The Structure and Operation of the ROS: The laser light source for the ROS is a semiconductor laser diode with a maximum output of 3mW. A monitor circuit keeps laser output at a constant level. Image data received from the print controller modulates the laser beam, turning it on and off according to the image information.
  • Page 53 EPSON EPL-N2050 Revision B CRU (Electro-Photography): The CRU is composed of six major components. Drum: An aluminum cylinder with a coating of photoconductive material on the surface. The photoconductive property of the drum allows the drum surface to hold an electrical charge while in darkness, and discharge it when exposed to the light.
  • Page 54 EPSON EPL-N2050 Revision B FRAME & SIZE SENSOR PWBA Size 1: Connective PWBA between the PWBA HKB MCU, PWBA Feeder and the PWBA Size Option. This receives and sends the signals, information data, and electric power. The Switch Size is mounted on...

  • Page 55: Main Control Circuit

    EPSON EPL-N2050 Revision B 2.1.5 Main Control Circuit 2.1.5.2 Specification of the Controller The video data sent from the host computer is input to the controller circuit Table 2-1. Main Components of C305MAIN Board through either interface circuit or network board. The C305MAIN, which is the...
  • Page 56 MasterCLK 14.31818MHz 66.67MHz 3.3V SSCG 4310-167 (IC7) 120pin (3.3V) To SDRAM (IC5) 74LVCH16646 Interrupt MD [31:0] SysAD 56pin*2 (IC17/18) SysCMD Ctrl DRAM DIMM 0-256MB (168pin)*1 (3.3V) RESET (IC10) VideoCLK MA [13:0] 35.25451MHz SDRAM Video 36pin 64Mbit*16 54pin (IC15/16) Panel SDRAM 16MB (3.3V) 26pin 74LVX161284 Parallel...
  • Page 57 C H A P T E R TROUBLESHOOTING...

  • Page 58: Troubleshooting

    EPSON EPL-N2050 Revision B 3.1 Troubleshooting Table 3-1. Service Flowchart Block Procedure 3.1.1 Service Flowchart Identify the Problem 1. Verify that the reported problem does exit. To use the Service Flowchart, start from Block 1 to identify the problem. After 2.
  • Page 59 EPSON EPL-N2050 Revision B Table 3-2. Service Flowchart (Continued) Block Procedure Final Checkout 1. Reinstall all of the covers that you removed while servicing the printer. 2. Check that the original error code is gone and there are no new error codes displayed.

  • Page 60: Fip Flowchart

    EPSON EPL-N2050 Revision B 3.1.2 FIP Flowchart 3.1.2.2 How to Follow the FIP 1. Each numbered step in a FIP instructs you to perform a certain action or If you used the Service Flowchart, it should have directed you to this section.
  • Page 61 EPSON EPL-N2050 Revision B 3.1.2.3 General Notes on the FIPs 10. FIPs may instruct you to remove or replace a component. Refer to Section 9 Removal and Replacement, for information on how to remove and 1. FIPs assume there is no malfunction in printer controller. If you are reinstall a component.

  • Page 62: Troubleshooting By Printer Message

    EPSON EPL-N2050 Revision B 3.2 Troubleshooting by Printer Message Table 3-3. Printer Messages Message Classification EJL Status The LCD panel of the control panel unit is used to display various printer Feed Jam Error 4009 status and error conditions. There are three types of messages displayed by the printer: Status Message, Error Message, and Warning Message.
  • Page 63 EPSON EPL-N2050 Revision B Table 3-3. Printer Messages Table 3-3. Printer Messages Message Classification EJL Status Message Classification EJL Status Toner Out Error 4001 Format Error ROM B 2000 Warning (Display test printing) 1010 Paper Set ssss ttt Error 3003...

  • Page 64: Details Of Printer Messages (New And Model-Dependent)

    EPSON EPL-N2050 Revision B 3.2.1 Details of Printer Messages Action Open the rear cover, pull out the Duplex Unit, remove the jammed (New and Model-dependent) paper and close the cover, and the printer will automatically recover from the error. Described below are model-dependent specification details of the printer After warming up, restart printing from the print data which jam messages.
  • Page 65 EPSON EPL-N2050 Revision B 6. Face-down Full (Error) Action Close the front cover. Explanation This error occurs when an attempt is made to eject paper to Face- 10. Rear Cover Open (Error) down which is full. Explanation The rear cover is open.
  • Page 66 EPSON EPL-N2050 Revision B 13. Paper Set ssss ttt (Error) When both paper size and paper type match the specified values but there is no paper placed in the unit, paper empty error will occur Explanation instead of giving this warning.

  • Page 67: Service Call Errors

    EPSON EPL-N2050 Revision B 3.2.2 Service Call Errors Table 3-6. Controller Errors (Continued) Error Code Explanation 3.2.2.1 Engine Errors ffff The following table lists the engine-related service call errors produced by 0088 CPU error (SYSCALL exception) this printer. 0089 CPU error (Break exception) Table 3-5.

  • Page 68: Ram Expansion

    EPSON EPL-N2050 Revision B Table 3-6. Controller Errors (Continued) 3.2.3 RAM Expansion Error Code This printer produces Duplex Mem Overflow, Mem Overflow, Image Explanation ffff Optimum, Collate was disabled, and Need Memory messages. 1100 ROM checksum error (bit 0 to 15) (Font)

  • Page 69: Troubleshooting By Printer Performance

    12. Is the recommended paper stock being used in the printer? PWB ESS. 2. Turn ON the Main Power. 13. Does the customer use the printer as instructed in the EPL-N2050 User’s Does the Fan Assy function normally? Manual? PWBA LVPS 14.
  • Page 70 EPSON EPL-N2050 Revision B Table 3-7. Inoperative Printer (Continued) Table 3-7. Inoperative Printer (Continued) Step Actions & Questions Step Actions & Questions PWBA HVPS MOTOR ASSY MAIN Replace the Unplug P/J11 on the PWBA HVPS. Replace the Disconnect P/J29 from the PWBA HKB MCU.

  • Page 71: Erratic Operation

    EPSON EPL-N2050 Revision B 3.3.2 Erratic Operation 3.3.3 Inoperative Drive Components Table 3-8. Erratic Operation Table 3-9. Inoperative Drive Components Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following componets: Inspect the following componets: •...

  • Page 72: Troubleshooting By Print Image Quality

    11. Is the printer sitting on a level and stable surface? 12. Is the recommended paper stock being used in the printer? 13. Does the customer use the printer as instructed in the EPL-N2050 User’s Manual? 14. Are consumables, such as the CRU, replaced at recommended intervals?

  • Page 73: Light (Undertone) Print

    EPSON EPL-N2050 Revision B 3.4.1 Light (Undertone) Print Table 3-10. Light Print Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they PAPER CONDITIONS Load fresh and Go to Step 2. compatible with your printer version, dry paper.

  • Page 74: Blank Print (No Image)

    EPSON EPL-N2050 Revision B 3.4.2 Blank Print (No Image) Table 3-11. Blank Print Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they DRUM GROUND The entire page is blank. compatible with your printer version, Check the Drum Ground Path:...

  • Page 75: Black Print

    EPSON EPL-N2050 Revision B 3.4.3 Black Print Table 3-12. Black Print Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they HVPS CR The entire page is black. Go to compatible with your printer version, Use a sheet of paper to cover the...

  • Page 76: Vertical White Banding

    EPSON EPL-N2050 Revision B 3.4.4 Vertical White Banding Table 3-13. Vertical White Banding Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they LASER BEAM PATH There are areas of the image compatible with your printer version,...

  • Page 77: Vertical Linear Deletions

    EPSON EPL-N2050 Revision B 3.4.5 Vertical Linear Deletions Table 3-14. Vertical Linear Deletions Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they LASER BEAM PATH There are areas of the image compatible with your printer version,...

  • Page 78: Horizontal White Banding

    EPSON EPL-N2050 Revision B 3.4.6 Horizontal White Banding Table 3-15. Horizontal White Banding Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they PAPER CONDITIONS There are areas of the image Replace with compatible with your printer version,...

  • Page 79: Vertical Black Streaks

    EPSON EPL-N2050 Revision B 3.4.7 Vertical Black Streaks Table 3-16. Vertical Black Streaks Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they LASER BEAM PATH There are black lines running compatible with your printer version, vertically along the page.

  • Page 80: Horizontal Black Streaks

    EPSON EPL-N2050 Revision B 3.4.8 Horizontal Black Streaks Table 3-17. Horizontal Black Streaks Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they DRUM GROUND There are black lines running compatible with your printer version, Check the Drum Ground Path: Re-establish horizontally across the page.

  • Page 81: White Spots

    EPSON EPL-N2050 Revision B 3.4.9 White Spots Table 3-18. White Spots Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they PAPER CONDITIONS There are areas of the image Replace with compatible with your printer version,...

  • Page 82: Black Spots

    EPSON EPL-N2050 Revision B 3.4.10 Black Spots Table 3-19. Black Spots Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they BTR Assy There are spots of toner compatible with your printer version, randomly scattered over the...

  • Page 83: Ghost Print

    EPSON EPL-N2050 Revision B 3.4.11 Ghost Print Table 3-20. Ghost Print Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they PAPER CONDITIONS There are ghost images Replace with compatible with your printer version, appearing on the page. The...

  • Page 84: Dirty Background

    EPSON EPL-N2050 Revision B 3.4.12 Dirty Background Table 3-21. Dirty Background Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are the HVPS CR There is toner contamination on Go to compatible with your printer version, all or part of the page. The...

  • Page 85: Skewed Image

    EPSON EPL-N2050 Revision B 3.4.13 Skewed Image Table 3-22. Skewed Image Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they PAPER FEED The image is not parallel with Reload the compatible with your printer version, the sides of the page.

  • Page 86: Damaged Print

    EPSON EPL-N2050 Revision B 3.4.14 Damaged Print Table 3-23. Damaged Print Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they PAPER CONDITIONS The printed paper comes out of Replace with compatible with your printer version,...

  • Page 87: Unfused Image

    EPSON EPL-N2050 Revision B 3.4.15 Unfused Image Table 3-24. Unfused Image Step Action and Question Problem Initial Analysis 1. Inspect the following components. Are they PAPER CONDITIONS The printed image is not fully Replace with compatible with your printer version, fused to the paper.

  • Page 88: Misregistration

    EPSON EPL-N2050 Revision B 3.4.16 Misregistration Table 3-25. Misregistration Step Action and Question Problem Suspect Components 1. Inspect the following components. Are they PAPER CONDITIONS The printed image is not Replace with compatible with your printer version, centered on the page or is...

  • Page 89: Secondary Fips

    11. Is the printer sitting on a level and stable surface? 12. Is recommended paper stock being used in the printer? 13. Does the customer use the printer as instructed in the EPL-N2050 User’s Manual? 14. Are consumables, such as the CRU, replaced at recommended intervals?
  • Page 90 EPSON EPL-N2050 Revision B Table 3-27. LVPS Failure (+24VDC) Table 3-28. ROS Assy Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components. Inspect the following components. Replace the • PWBA LVPS • PWBA HKB MCU problem Go to Step 2.
  • Page 91 EPSON EPL-N2050 Revision B Table 3-29. Heat Rod Failure (Continued) Table 3-29. Heat Rod Failure Step Actions & Questions Step Actions & Questions HEAT ROD SIGNAL INTIAL ANALYSIS Disconnect J282 from the HVPS Assy. Inspect the following components. Replace the Replace the Disconnect P/J27 from the PWB MCU.
  • Page 92 EPSON EPL-N2050 Revision B Table 3-30. Temperature Sensor Failure Table 3-31. Sensor Exit Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components. Inspect the following components. • Fuser Assy • Sensor Exit in the Fuser Assy •...
  • Page 93 EPSON EPL-N2050 Revision B Table 3-32. Sensor Photo: Regi Failure Table 3-33. Sensor Photo: No Pap 1 Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components. Inspect the following components. P/H Assy •...
  • Page 94 EPSON EPL-N2050 Revision B Table 3-33. Sensor Photo: No Pap 1 Failure Table 3-34. Sensor Photo: Exit Failure Step Actions & Questions Step Actions & Questions HARNESS ASSY FEEDER (J33-J331) INITIAL ANALYSIS Check the continuity between L331-16 and Replace the Inspect the following components.
  • Page 95 EPSON EPL-N2050 Revision B Table 3-35. Sensor Assy CRU Failure Table 3-36. Drive Components Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components. Inspect the following components. Sensor Assy CRU • Motor Assy Main •...
  • Page 96 EPSON EPL-N2050 Revision B Table 3-36. Drive Components Failure (Continued) Table 3-36. Drive Components Failure (Continued) Step Actions & Questions Step Actions & Questions ROLL REGI METAL and ROLL REGI RUBBER Remove the CRU. Replace the Open the Cover Assy Front.
  • Page 97 EPSON EPL-N2050 Revision B Table 3-37. Paper Size Sensor Failure Table 3-38. Solenoid Pick Up Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components. Inspect the following components. • Cassette Assy • Solenoid Pick Up •...
  • Page 98 EPSON EPL-N2050 Revision B Table 3-39. Clutch Assy Feed Failure Table 3-40. Clutch Assy Turn Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components: Inspect the following components: • Clutch Assy Feed •...
  • Page 99 EPSON EPL-N2050 Revision B Table 3-41. Fan Assy Failure Table 3-42. Toner Sensor Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components: Inspect the following components: • Fan Assy • Toner Sensor •...
  • Page 100 EPSON EPL-N2050 Revision B Table 3-43. Exit Failure Table 3-44. PWBA HVPS Failure Step Actions & Questions Step Actions & Questions INITIAL ANALYSIS INITIAL ANALYSIS Inspect the following components: Inspect the following components: • Motor Assy Exit • PWBA HKB MCU •...
  • Page 101 EPSON EPL-N2050 Revision B Table 3-45. Electrical Noise (Continued) Table 3-45. Electrical Noise Step Actions & Questions Step Actions & Questions HARNESS ASSY FUSER-M (J271, J11, J27, Replace the INITIAL ANALYSIS J262) Harness Assy Inspect the following components: Go to Step 7.

  • Page 102: Chapter 4 Disassembly And Assembly

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

  • Page 103: Overview

    4.1.3 Notations in the Manual The printer orientation expressed in the procedure is defined as follows: This section contains the removal and assembly procedures for the main parts and subsystems of the EPL-N2050 printer. 4.1.1 Preparation 1. Switch OFF the main power.

  • Page 104: Disassembly And Assembly

    EPSON EPL-N2050 Revision B 4.2 Disassembly and Assembly 4.2.1.2 Assembly NOTE: In the following steps, mount the Cover Left while paying 4.2.1 Cover Left attention to the sections overlapped with the Cover Assy Top and the Cover Assy L/H. 4.2.1.1 Removal 1.

  • Page 105: Cover Assy I/F

    EPSON EPL-N2050 Revision B 4.2.2 Cover Assy I/F 4.2.2.2 Assembly NOTE: In the following steps, mount the Cover Assy I/F while paying 4.2.2.1 Removal attention to the sections overlapped with the Cover Assy Top 1. Remove the two screws securing the Cover Assy I/F to the printer.

  • Page 106: Cover Assy Front

    EPSON EPL-N2050 Revision B 4.2.3 Cover Assy Front 4.2.3.1 Removal NOTE: In the following steps, take care not to drop and damage the Cover Assy Front. 1. Open the Cover Assy Front. 2. Remove the KL clip that secures the left bearing bore of Cover Assy Front to the left stud of the printer.

  • Page 107: Tray Assy Mbf

    EPSON EPL-N2050 Revision B 4.2.4 Tray Assy MBF 5. Mount the Cover Assy Front (Section 4.2.3). 6. Close the Cover Assy Front. 4.2.4.1 Removal 1. Open the Cover Assy Front. 2. Remove the Cover Assy Front (Section 4.2.3). 3. Disengage the Clip that secures the Stopper Tray to the Tray Assy MBF.

  • Page 108: Cover Front L/H

    EPSON EPL-N2050 Revision B 4.2.5 Cover Front L/H 4.2.5.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the three screws securing the Cover L/H to the printer. 3. Disengage the upper left hook of Cover L/H, draw it a little toward the front from the printer.

  • Page 109: Cover Option

    EPSON EPL-N2050 Revision B 4.2.6 Cover Option 4.2.6.2 Assembly 1. Align four bosses at the front of Cover Option with mounting holes in the 4.2.6.1 Removal Cover Assy Top. 1. Open the Cover Rear. 2. Pushing the rear side of Cover Option, insert two latches of Cover Option into the Cover Assy Top.

  • Page 110: Cover Assy Top

    EPSON EPL-N2050 Revision B 4.2.7 Cover Assy Top 4.2.7.2 Assembly NOTE: In the following steps, mount the Cover Assy Top while 4.2.7.1 Removal paying attention to the sections overlapped with the Cover 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 111: Control Assy Panel

    EPSON EPL-N2050 Revision B 4.2.8 Control Assy Panel 4.2.8.2 Assembly NOTE: In the following steps, mount the Control Assy Panel while 4.2.8.1 Removal paying attention to the sections overlapped with the Cover 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 112: Cover Right

    EPSON EPL-N2050 Revision B 4.2.9 Cover Right 4.2.9.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Open the Cover Rear. 4. Remove the Cover Assy Top (Section 4.2.7). 5. Remove the four screws securing the Cover Right to the printer.

  • Page 113: Cap Envelope

    EPSON EPL-N2050 Revision B 4.2.10 Cap Envelope 4.2.10.1 Removal 1. Open the Cover Rear from the printer. 2. Draw the right Cap Envelope secured to the Chute Assy Face Up from the Cover Rear. 3. Draw the left Cap Envelope secured to the Chute Assy Face Up from the Cover Rear.

  • Page 114: Stopper

    EPSON EPL-N2050 Revision B 4.2.11 Stopper 4.2.11.1 Removal 1. Remove the Cover Rear (Section 4.2.12). 2. Remove the one screw securing the Stopper to the printer. 3. Remove the Stopper to the printer. 4.2.11.2 Assembly 1. Align the Stopper with its mount position to the printer.

  • Page 115: Cover Rear

    EPSON EPL-N2050 Revision B 4.2.12 Cover Rear 4.2.12.2 Assembly NOTE: In the following steps, take care not to drop and then damage 4.2.12.1 Removal the Cover Rear. NOTE: In the following steps, take care not to drop and then damage 1.

  • Page 116: Cassette Assy

    EPSON EPL-N2050 Revision B 4.2.13 Cassette Assy 4.2.13.1 Removal NOTE: Draw the Cassette Assy from the printer. 4.2.13.2 Assembly NOTE: Aligning the position exactly, insert the Cassette Assy into the printer. Figure 4-14. Cassette Assy Removal Disassembly and Assembly Disassembly and Assembly...

  • Page 117: Clutch Assy Friction

    EPSON EPL-N2050 Revision B 4.2.14 Clutch Assy Friction 4.2.14.1 Removal 1. Draw the Cassette Assy from the printer. 2. Release the left and right latches of Cassette Assy that secures the Chute Retard Base L and Chute Retard Base R from the Cassette Assy.

  • Page 118: Roll Assy

    EPSON EPL-N2050 Revision B 4.2.15 Roll Assy 4.2.15.1 Removal 1. Draw the Cassette Assy from the printer. 2. Release the left and right latches of Cassette Assy that secures the Chute Retard Base L and Chute Retard Base R from the Cassette Assy.

  • Page 119: Spring Retard

    EPSON EPL-N2050 Revision B 4.2.16 Spring Retard 4.2.16.1 Removal 1. Draw the Cassette Assy from the printer. 2. Release the left and right latches of Cassette Assy that secures the Chute Retard Base L and Chute Retard Base R from the Cassette Assy.

  • Page 120: Motor Assy

    EPSON EPL-N2050 Revision B 4.2.17 Motor Assy 4.2.17.2 Assembly 1. Engaging the groove at a rotational part of Motor Assy with the boss of 4.2.17.1 Removal Shaft Assy Tongue, mount the Motor Assy on the Cassette Assy. 1. Draw out the Cassette Assy from the printer.

  • Page 121: Connector And Guide Socket

    EPSON EPL-N2050 Revision B 4.2.18 Connector and Guide Socket 4.2.18.1 Removal 1. Draw out the Cassette Assy from the printer. NOTE: In the following steps, take care not to drop and miss the Spring Motor. 2. Remove the two screws securing the Holder L to the Cassette Assy.
  • Page 122 EPSON EPL-N2050 Revision B 4.2.18.2 Assembly 1. Aligning the Connector with the rail of Guide Socket, slide the Connector downward to connect. NOTE: In the following steps, take care not to drop and miss the Spring. 2. Mount the Spring (Section 4.2.19).

  • Page 123: Spring

    EPSON EPL-N2050 Revision B 4.2.19 Spring 4.2.19.1 Removal 1. Draw the Cassette Assy from the printer. NOTE: In the following steps, take care not to drop and miss the Spring Motor. 2. Remove the two screws securing the Holder L to the Cassette Assy.

  • Page 124: Roll Assy Turn

    EPSON EPL-N2050 Revision B 4.2.20 Roll Assy Turn 4.2.20.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Cover Assy L/F (Section 4.2.2).
  • Page 125 EPSON EPL-N2050 Revision B 4.2.20.2 Assembly 1. Hook the Spring Extension to two notches on the right side of Roll Assy Turn to secure the Spring Extension to the Roll Assy Turn. 2. Hook the Spring Extension to two notches on the left side of Roll Assy Turn to secure the Spring Extension to the Roll Assy Turn.

  • Page 126: Spring Chute

    EPSON EPL-N2050 Revision B 4.2.21 Spring Chute 5. Plug the connector (P/J641) to the Clutch Assy Turn from the Paper Feeder. 4.2.21.1 Removal 6. Mount the PWBA PS (Section 4.2.85). 1. Remove the Cover Assy Front (Section 4.2.3). 7. Mount the Paper Feeder (Section 4.2.29).

  • Page 127: Actuator N/P

    EPSON EPL-N2050 Revision B 4.2.22 Actuator N/P 11. Mount the Chute MBF Assy (Section 4.2.30). 12. Mount the Cover Front L/H (Section 4.2.5). 4.2.22.1 Removal 13. Mount the Cover Assy Front (Section 4.2.3). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 128: Sensor Photo: Face Control, Low Paper

    EPSON EPL-N2050 Revision B 4.2.23 Sensor Photo: Face Control, Low Paper 4. Plug the connector (P/J662) to the left Sensor Photo: Face Control from the Paper Feeder. 4.2.23.1 Removal 5. Mount the Paper Feeder (Section 4.2.85). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 129: Feeder Assy

    EPSON EPL-N2050 Revision B 4.2.24 Feeder Assy 4.2.24.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Cover Assy I/F (Section 4.2.2).
  • Page 130 EPSON EPL-N2050 Revision B 4.2.24.2 Assembly NOTE: In the following steps, take care not to drop and lose the Spring Nudger. 1. Align the position exactly, mount the Spring Nudger on the boss of the Paper Feeder. 2. Open the Chute Assy Front from the Paper Feeder.

  • Page 131: Roll Assy

    EPSON EPL-N2050 Revision B 4.2.25 Roll Assy 4.2.25.2 Assembly 1. Open the Chute Assy Front from the Paper Feeder in the printer. 4.2.25.1 Removal 2. Insert the Roll Assy into the rear shaft of Feeder Assy from the Paper 1. Draw the Cassette Assy from the printer.

  • Page 132: Pwba Feeder

    EPSON EPL-N2050 Revision B 4.2.26 PWBA Feeder 4.2.26.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Cover Assy I/F (Section 4.2.2).
  • Page 133 EPSON EPL-N2050 Revision B 4.2.26.2 Assembly 1. Align the PWBA Feeder with its mount position to the Paper Feeder. 2. Secure the PWBA Feeder to the Paper Feeder with four screws. 3. Plug the connector (P/J64) to the PWBA Feeder.

  • Page 134: Clutch Assy Feed

    EPSON EPL-N2050 Revision B 4.2.27 Clutch Assy Feed 4.2.27.1 Removal 4.2.27.2 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Cover Assy I/F (Section 4.2.2).
  • Page 135 EPSON EPL-N2050 Revision B 4.2.27.3 Assembly 1. Aligning the position exactly, insert the Clutch Assy Feed into the shaft of Feeder Assy in the Paper Feeder. 2. Plug the connector (P/J65) to the PWBA Feeder. 3. Clamp the harness of Clutch Assy Feed to the Paper Feeder.

  • Page 136: Socket

    EPSON EPL-N2050 Revision B 4.2.28 Socket 4.2.28.1 Removal 1. Draw the Cassette Assy from the printer. 2. Remove the two screws securing the Socket to the Paper Feeder in the printer. NOTE: In the following steps, do not detach Paper Feeder and Socket far away because they are connected with the harness.

  • Page 137: Paper Feeder

    EPSON EPL-N2050 Revision B 4.2.29 Paper Feeder 4.2.29.2 Assembly 1. Aligning the position exactly, insert the Paper Feeder into the printer. 4.2.29.1 Removal 2. Secure the Paper Feeder to the printer with seven screws. 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 138: Chute Mbf Assy

    EPSON EPL-N2050 Revision B 4.2.30 Chute MBF Assy 4.2.30.2 Assembly 1. Align the Chute MBF Assy with its mount position to the Printer. 4.2.30.1 Removal 2. Secure the Chute MBF Assy to the printer with four screws. 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 139: Roll Assy Mbf (With 3-6, 28)

    EPSON EPL-N2050 Revision B 4.2.31 Roll Assy MBF (with 3-6, 28) 4.2.31.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Spring MSI 300 (Section 4.2.38).
  • Page 140 EPSON EPL-N2050 Revision B 4.2.31.2 Assembly 1. Insert the boss of left shaft of Shaft Assy MBF into the left slit of Chute MBF Assy. 2. Aligning the boss of left shaft of Shaft Assy MBF with the left slit of Chute MBF Assy, move the Roll Assy MBF (with 3-6) to the right, and insert the right shaft of Shaft Assy MBF into the Bearing.

  • Page 141: Roll Assy Mbf

    EPSON EPL-N2050 Revision B 4.2.32 Roll Assy MBF 4.2.32.2 Assembly 1. Aligning the position exactly, mount the Roll Assy MBF on the shaft of 4.2.32.1 Removal Shaft Assy MBF from the Chute MBF Assy. 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 142: Tray Bottom Assy

    EPSON EPL-N2050 Revision B 4.2.33 Tray Bottom Assy 4.2.33.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Spring MSI 300 (Section 4.2.38).
  • Page 143 EPSON EPL-N2050 Revision B 4.2.33.2 Assembly 1. Mount the Bearing Exits on the left and right shafts of Tray Bottom Assy. 2. Aligning the position exactly, mount the Tray Bottom Assy together with the left and right Bearing Exits on the bearing section of Chute MBF Assy.

  • Page 144: Actuator N/P Mbf

    EPSON EPL-N2050 Revision B 4.2.34 Actuator N/P MBF 4.2.34.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Spring MSI 300 (Section 4.2.38).
  • Page 145 EPSON EPL-N2050 Revision B 4.2.34.2 Assembly 1. Aligning the position exactly, mount the Actuator N/P MBF on the back of Tray Bottom in the Chute MBF Assy. 2. Secure the shaft of Actuator N/P MBF to two hooks on the back of Tray Bottom.

  • Page 146: Pad Assy Retard

    EPSON EPL-N2050 Revision B 4.2.35 Pad Assy Retard 4.2.35.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Spring MSI 300 (Section 4.2.38).
  • Page 147 EPSON EPL-N2050 Revision B 4.2.35.2 Assembly 1. Engage the hole in the right bracket of Pad Assy Retard with the right boss of Chute MBF Assy. 2. Deflecting the left bracket of Pad Assy Retard, engage the left boss of Chute MBF Assy with the hole in the right bracket of Pad Assy Retard.

  • Page 148: Sensor Photo: Paper Set

    EPSON EPL-N2050 Revision B 4.2.36 Sensor Photo: Paper Set 4.2.36.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Spring MSI 300 (Section 4.2.38).
  • Page 149 EPSON EPL-N2050 Revision B 4.2.36.2 Assembly 1. Aligning the position exactly, secure the Sensor Photo: Paper Set to the Chute Assy MBF with five hooks. 2. Plug the connector (P/J451) to the Sensor Photo: Paper Set. 3. Insert the Spring Tray Bottom MBF into two studs of Chute MBF Assy.

  • Page 150: Solenoid Pick Up

    EPSON EPL-N2050 Revision B 4.2.37 Solenoid Pick Up 4.2.37.2 Assembly 1. Align the Solenoid Pick Up with its mount position to the Chute MBF 4.2.37.1 Removal Assy. 1. Remove the Cover Assy Front (Section 4.2.3). 2. Secure the Solenoid Pick Up to the Chute MBF Assy with one screw.

  • Page 151: Spring Msi 300

    EPSON EPL-N2050 Revision B 4.2.38 Spring MSI 300 4.2.38.2 Assembly 1. Hook the Spring MSI 300 to the boss of Gear Pick Up of Chute MBF Assy. 4.2.38.1 Removal 2. Hook the Spring MSI 300 to the hole in Chute MBF Assy.

  • Page 152: Gear Pick Up

    EPSON EPL-N2050 Revision B 4.2.39 Gear Pick Up 4.2.39.2 Assembly 1. Insert the Gear Pick Up into the left shaft of Shaft Assy MBF from the 4.2.39.1 Removal Chute MBF Assy. 1. Remove the Cover Assy Front (Section 4.2.3). 2. Hook the Gear Pick Up to the groove in the shaft of Shaft Assy MBF.

  • Page 153: Connector Assy Env

    EPSON EPL-N2050 Revision B 4.2.40 Connector Assy ENV 4.2.40.2 Assembly 1. Align the Connector Assy ENV with its mount position to the Plate ENV 4.2.40.1 Removal Assy. 1. Remove the Cover Assy Front (Section 4.2.3). 2. Secure the Connector Assy ENV to the Plate ENV Assy with two screws.

  • Page 154: Tray Bottom Pick Up

    EPSON EPL-N2050 Revision B 4.2.41 Tray Bottom Pick Up 4.2.41.2 Assembly 1. Aligning the position exactly, mount the Tray Bottom Pick Up on the shaft 4.2.41.1 Removal of Tray Bottom Assy from the Chute MBF Assy. 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 155: P/H Assy

    EPSON EPL-N2050 Revision B 4.2.42 P/H Assy 4.2.42.2 Assembly 1. Insert the P/H Assy from diagonal right into the printer, and align the 4.2.42.1 Removal position. 1. Remove the Cover Assy Front (Section 4.2.3). 2. Secure the P/H Assy to the printer with five screws.

  • Page 156: Roll Regi Rubber

    EPSON EPL-N2050 Revision B 4.2.43 Roll Regi Rubber 20. Moving the Roll Regi Rubber to the right from the P/H Assy, draw the left shaft of Roll Regi Rubber from the left bearing bore of P/H Assy. 4.2.43.1 Removal 21. Draw upward the right shaft of Roll Regi Rubber from the bearing of P/H Assy, and draw diagonal rightward the Roll Regi Rubber from the P/H 1.
  • Page 157 EPSON EPL-N2050 Revision B 4.2.43.2 Assembly 20. Mount the Chute MBF Assy (Section 4.2.30). 21. Mount the Cover Front L/H (Section 4.2.5). 1. Insert the left shaft of Roll Regi Rubber into the left bearing bore of P/H Assy. 22. Mount the Cover Assy Front (Section 4.2.3).

  • Page 158: Actuator Regi

    EPSON EPL-N2050 Revision B 4.2.44 Actuator Regi 8. Mount the Shaft 14. 9. Mount the Chute MBF Assy. 4.2.44.1 Removal 10. Mount the Cover Front L/H. 1. Remove the Cover Assy Front (Section 4.2.3). 11. Mount the Cover Assy Front.

  • Page 159: Spring Sensor Regi

    EPSON EPL-N2050 Revision B 4.2.45 Spring Sensor Regi 8. Mount the Shaft 14 (Section 4.2.51). 9. Mount the Chute MBF Assy (Section 4.2.30). 4.2.45.1 Removal 10. Mount the Cover Front L/H (Section 4.2.5). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 160: Sensor Photo: Regi

    EPSON EPL-N2050 Revision B 4.2.46 Sensor Photo: Regi 4.2.46.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Shaft 14 (Section 4.2.51).

  • Page 161: Spring Regi

    EPSON EPL-N2050 Revision B 4.2.47 Spring Regi 6. From the P/H Assy, engage the hook at the bottom of right Spring Regi with the Screw Earth. 4.2.47.1 Removal 7. Mount the P/H Assy (Section 4.2.42). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 162: Gear Regi Metal

    EPSON EPL-N2050 Revision B 4.2.48 Gear Regi Metal 4.2.48.2 Assembly 1. Mount the Gear Regi Metal on the Roll Regi Metal from the P/H Assy. 4.2.48.1 Removal 2. Secure the Gear Regi Metal to the Roll Regi Metal of P/H Assy with the E- 1.

  • Page 163: Gear Regi Rubber

    EPSON EPL-N2050 Revision B 4.2.49 Gear Regi Rubber 4.2.49.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Shaft 14 (Section 4.2.51).

  • Page 164: Clutch Regi

    EPSON EPL-N2050 Revision B 4.2.50 Clutch Regi 4.2.50.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Shaft 14 (Section 4.2.51).

  • Page 165: Shaft 14 And Gear 14

    EPSON EPL-N2050 Revision B 4.2.51 Shaft 14 and Gear 14 4.2.51.2 Assembly 1. Align the Gear 14 with its mount position to the printer. 4.2.51.1 Removal 2. Insert the Shaft 14 from the hole in the P/H Assy, and secure the Gear 14 1.

  • Page 166: Toner Sensor

    EPSON EPL-N2050 Revision B 4.2.52 Toner Sensor 9. Mount the Cover Front L/H (Section 4.2.5). 10. Mount the Cover Assy Front (Section 4.2.3). 4.2.52.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5).

  • Page 167: Btr Assy

    EPSON EPL-N2050 Revision B 4.2.53 BTR Assy 4.2.53.1 Removal In the following steps, do not touch the roll surface of BTR Assy and the Detack Saw of Chute Trans Assy. In removing the BTR Assy from the printer, take care not to damage the roll of BTR Assy.

  • Page 168: Chute Trans Assy

    EPSON EPL-N2050 Revision B 4.2.54 Chute Trans Assy 10. Mount the Cover Front L/H (Section 4.2.5). 11. Mount the Cover Assy Front (Section 4.2.3). 4.2.54.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5).

  • Page 169: Fuser Assy

    EPSON EPL-N2050 Revision B 4.2.55 Fuser Assy 4.2.55.2 Assembly 1. Align the Fuser Assy with its mount position to the printer. 4.2.55.1 Removal 2. Secure the Fuser Assy to the printer with two screws. 1. Open the Cover Rear from the printer.

  • Page 170: Harness Assy Fuser-M

    EPSON EPL-N2050 Revision B 4.2.56 Harness Assy Fuser-M 25. Pull the Harness Assy Fuser-M from the left hole in the printer. 26. Remove the two screws securing the Harness Assy Fuser-M to the printer. 4.2.56.1 Removal 27. Remove the Harness Assy Fuser-M from the printer.
  • Page 171 EPSON EPL-N2050 Revision B 4.2.56.2 Assembly 26. Mount the Cover Front L/H (Section 4.2.5). 27. Mount the Cover Assy Front (Section 4.2.3). 1. Align the Harness Assy Fuser-M with its mount position to the printer. 2. Secure the Harness Assy Fuser-M to the printer with two screws.

  • Page 172: Eliminator Assy Exit

    EPSON EPL-N2050 Revision B 4.2.57 Eliminator Assy Exit 4.2.57.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy Top (Section 4.2.7).

  • Page 173: Actuator Full Stack

    EPSON EPL-N2050 Revision B 4.2.58 Actuator Full Stack 4.2.58.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy Top (Section 4.2.7).

  • Page 174: Bearing Exit And Roll Assy Mid-1

    EPSON EPL-N2050 Revision B 4.2.59 Bearing Exit and Roll Assy MID-1 21. Unhook the Bearing Exit that secures the left and right shafts of lower Roll Assy MID-1 from the Chute Assy Exit. 4.2.59.1 Removal 22. Remove the lower Roll Assy MID-1 together with the left and right Bearing Exits on the Roll Assy MID-1 from the Chute Assy Exit.
  • Page 175 EPSON EPL-N2050 Revision B 4.2.59.2 Assembly 20. Mount the Cover Assy I/F (Section 4.2.2). 21. Mount the Cover Rear (Section 4.2.12). 1. Insert the Bearing Exit into the left and right shafts of lower Roll Assy MID-1. 22. Mount the Cover Front L/H (Section 4.2.5).

  • Page 176: Bearing Exit And Roll Assy Mid-2

    EPSON EPL-N2050 Revision B 4.2.60 Bearing Exit and Roll Assy MID-2 4.2.60.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy I/F (Section 4.2.2).
  • Page 177 EPSON EPL-N2050 Revision B 4.2.60.2 Assembly 1. Insert the Bearing Exit into the left and right shafts of Roll Assy MID-2. 2. Mount the Roll Assy MID-2 together with the left and right Bearing Exits on the Roll Assy MID-2 to the Chute Assy Exit.

  • Page 178: Sensor Photo: Exit

    EPSON EPL-N2050 Revision B 4.2.61 Sensor Photo: Exit 4.2.61.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy Top (Section 4.2.7).

  • Page 179: Cover Interlock

    EPSON EPL-N2050 Revision B 4.2.62 Cover Interlock 4.2.62.2 Assembly 1. Align the Cover interlock with it mount position to the printer. 4.2.62.1 Removal 2. Secure the Cover interlock to the printer with two screws. 10. Remove the Cover Rear (Section 4.2.12).

  • Page 180: Motor Assy Exit

    EPSON EPL-N2050 Revision B 4.2.63 Motor Assy Exit 4.2.63.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy I/F (Section 4.2.2).

  • Page 181: Chute Assy Exit

    EPSON EPL-N2050 Revision B 4.2.64 Chute Assy Exit 12. Mount the Cover Assy Front (Section 4.2.3). 4.2.64.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12).

  • Page 182: Cru Top Guide Assy

    EPSON EPL-N2050 Revision B 4.2.65 CRU Top Guide Assy 4.2.65.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy I/F (Section 4.2.2).

  • Page 183: Ros Assy

    EPSON EPL-N2050 Revision B 4.2.66 ROS Assy 4.2.66.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy Top (Section 4.2.7).

  • Page 184: Gear Assy Drive

    EPSON EPL-N2050 Revision B 4.2.67 Gear Assy Drive 4.2.67.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Fuser Assy (Section 4.2.55).
  • Page 185 EPSON EPL-N2050 Revision B 4.2.67.2 Assembly NOTE: Take care not to tangle the harness near the Gear Assy Drive mounting position when mounting the Gear Assy Drive. “D” is scribed around four holes in the printer where the Gear Assy Drive is mounted.

  • Page 186: Motor Assy Main

    EPSON EPL-N2050 Revision B 4.2.68 Motor Assy Main 4.2.68.2 Assembly NOTE: In the following steps, take care not to drop and damage the 4.2.68.1 Removal Motor Assy Main. 23. Remove the Cover Assy I/F (Section 4.2.2). 1. Align the Motor Assy Main with it mount position to the printer.

  • Page 187: Sensor Assy Cru

    EPSON EPL-N2050 Revision B 4.2.69 Sensor Assy CRU 8. Mount the Cover Assy I/F (Section 4.2.2). 9. Mount the Cover Rear (Section 4.2.12). 4.2.69.1 Removal 10. Mount the Cover Front L/H (Section 4.2.5). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 188: Plate Assy Left

    EPSON EPL-N2050 Revision B 4.2.70 Plate Assy Left 4.2.70.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Assy I/F (Section 4.2.2). 4. Remove the Cover Left (Section 4.2.1).

  • Page 189: Fan Assy

    EPSON EPL-N2050 Revision B 4.2.71 Fan Assy 4.2.71.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Rear (Section 4.2.12). 4. Remove the Cover Assy I/F (Section 4.2.2).

  • Page 190: Plate Handle

    EPSON EPL-N2050 Revision B 4.2.72 Plate Handle 4.2.72.2 Assembly 1. Align the Plate Handle with it mount position to the printer. 4.2.72.1 Removal 2. Secure the Plate Handle to the printer with four screws. 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 191: Pwba Size 1

    EPSON EPL-N2050 Revision B 4.2.73 PWBA Size 1 8. Mount the Plate Assy Left (Section 4.2.70). 9. Mount the Cover Left (Section 4.2.1). 4.2.73.1 Removal 10. Mount the Cover Assy I/F (Section 4.2.2). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 192: Harness Assy Size M

    EPSON EPL-N2050 Revision B 4.2.74 Harness Assy Size M 9. Mount the Cover Left (Section 4.2.1). 10. Mount the Cover Assy I/F (Section 4.2.2). 4.2.74.1 Removal 11. Mount the Cover Front L/H (Section 4.2.5). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 193: Cover Size Sensor

    EPSON EPL-N2050 Revision B 4.2.75 Cover Size Sensor 4.2.75.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Assy I/F (Section 4.2.2). 4. Remove the Cover Left (Section 4.2.1).

  • Page 194: Housing Size Sensor

    EPSON EPL-N2050 Revision B 4.2.76 10. Mount the Cover Front L/H (Section 4.2.5). Housing Size Sensor 11. Mount the Cover Assy Front (Section 4.2.3). 4.2.76.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5).

  • Page 195: Pwb Ess

    EPSON EPL-N2050 Revision B 4.2.77 PWB ESS 4.2.77.1 Removal 1. Remove the Cover Assy I/F (Section 4.2.2). 2. Unplug the connector (P/J) from the PWB ESS. 3. Unplug the connector (P/J) from the PWB ESS. 4. Remove the five screws securing the PWB ESS to the printer.

  • Page 196: Harness Assy Oct-M

    EPSON EPL-N2050 Revision B 4.2.78 Harness Assy OCT-M 9. Mount the Cover Left (Section 4.2.1). 10. Mount the Cover Assy I/F (Section 4.2.2). 4.2.78.1 Removal 11. Mount the Cover Front L/H (Section 4.2.5). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 197: Switch Assy I/L Rear

    EPSON EPL-N2050 Revision B 4.2.79 Switch Assy I/L Rear 7. Mount the Cover Interlock (Section 4.2.62). 8. Mount the Plate Assy Left (Section 4.2.70). 4.2.79.1 Removal 9. Mount the Cover Assy Top (Section 4.2.7). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 198: Harness Assy Dup-M

    EPSON EPL-N2050 Revision B 4.2.80 Harness Assy DUP-M NOTE: In the following steps, do not detach the Harness Assy DUP-M and the printer far away because they are connected with the harness. 4.2.80.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3).
  • Page 199 EPSON EPL-N2050 Revision B 4.2.80.2 Assembly 1. Insert the harness of Harness Assy DUP-M into the hole in the printer. 2. Align the Harness Assy DUP-M with its mount position to the printer. 3. Secure the Harness Assy DUP-M to the printer with two screws.

  • Page 200: Pwba Conn

    EPSON EPL-N2050 Revision B 4.2.81 PWBA CONN 10. Mount the Cover Assy Top (Section 4.2.7). 11. Mount the Cover Left (Section 4.2.1). 4.2.81.1 Removal 12. Mount the Cover Assy I/F (Section 4.2.2). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 201: Switch Assy I/L Front

    EPSON EPL-N2050 Revision B 4.2.82 Switch Assy I/L Front 4.2.82.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Assy I/F (Section 4.2.2). 4. Remove the Cover Left (Section 4.2.1).

  • Page 202: Pwba Mcu

    EPSON EPL-N2050 Revision B 4.2.83 PWBA MCU 4.2.83.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Assy I/F (Section 4.2.2). 4. Remove the Cover Left (Section 4.2.1).
  • Page 203 EPSON EPL-N2050 Revision B 4.2.83.2 Assembly 1. Align the PWBA MCU with it mount position to the printer. 2. Secure the PWBA MCU to the printer with four screws. 3. Plug the connector (P/J23) in the PWBA MCU. 4. Plug the connector (P/J32) in the PWBA MCU.

  • Page 204: Pwba 5Vdc

    EPSON EPL-N2050 Revision B 4.2.84 PWBA 5VDC 4.2.84.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Assy I/F (Section 4.2.2). 4. Remove the Cover Left (Section 4.2.1).

  • Page 205: Pwba Ps

    EPSON EPL-N2050 Revision B 4.2.85 PWBA PS 4.2.85.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Cover Assy I/F (Section 4.2.2). 4. Remove the Cover Left (Section 4.2.1).
  • Page 206 EPSON EPL-N2050 Revision B 4.2.85.2 Assembly 1. Connect the connector (P/J) of PWBA PS to the Main Switch on the printer. 2. Align the PWBA PS with it mount position to the printer. 3. Secure the PWBA PS to the printer with four screws.

  • Page 207: Main Switch

    EPSON EPL-N2050 Revision B 4.2.86 Main Switch 8. Mount the Cover Assy I/F (Section 4.2.2). 9. Mount the Cover Front L/H (Section 4.2.5). 4.2.86.1 Removal 10. Mount the Cover Assy Front (Section 4.2.3). 1. Remove the Cover Assy Front (Section 4.2.3).

  • Page 208: Pwba Hvps

    EPSON EPL-N2050 Revision B 4.2.87 PWBA HVPS 4.2.87.1 Removal 1. Remove the Cover Assy Front (Section 4.2.3). 2. Remove the Cover Front L/H (Section 4.2.5). 3. Remove the Chute MBF Assy (Section 4.2.30). 4. Remove the Shaft 14 (Section 4.2.51).
  • Page 209 EPSON EPL-N2050 Revision B 4.2.87.2 Assembly 1. Deflecting two hooks of Housing HVPS, mount the PWBA HVPS on the Housing HVPS. 2. Plug the connector (P/J TR) of Wire Assy TR to the PWBA HVPS. 3. Plug the connector (P/J DTS) of Wire Assy DTS to the PWBA HVPS.

  • Page 210: Chapter 5 Adjustment

    C H A P T E R ADJUSTMENT...
  • Page 211 EPSON EPL-N2050 Revision B No specific adjustment is required on this printer after repair. Adjustment...

  • Page 212: Chapter 6 Maintenance

    C H A P T E R MAINTENANCE...

  • Page 213: Overview

    EPSON EPL-N2050 Revision B 6.1 Overview 6.1.2 Maintenance by Service Personnel The units listed below are replace by the service personnel. Refer to the This section explains about maintenance of this printer. Lubrication and figures on the following pages for the location of those units.
  • Page 214 EPSON EPL-N2050 Revision B Figure 6-1. Fuser Assy Figure 6-2. BTR Assy Maintenance Overview...
  • Page 215 EPSON EPL-N2050 Revision B Roll Assy Kit Figure 6-3. Roll Assy Kit Maintenance Overview...

  • Page 216: Chapter 7 Appendix

    C H A P T E R APPENDIX...

  • Page 217: Connector Pin Diagram

    Table 7-1. Connector List Board Connector Function Reference This section provides supplemental information about the electrical connection in the EPL-N2050. CODE DIMM Slot Tables 7-2, 3 ROM DIMM Slot for Expansion 7.1.1 Connectors - C305MAIN ROM DIMM Slot for Expansion The figure below shows interconnections with the C305 Main Board.
  • Page 218 EPSON EPL-N2050 Revision B Table 7-2. Pin Assignment - CN1 Table 7-2. Pin Assignment - CN1 Signal Signal Signal Signal Table 7-3. Description of Signals - CN1 Signal Name Description D[31:0] Data bus Address bus. A22 is not connected. A23 is connected A[23:0] with A24 of VR32.
  • Page 219 EPSON EPL-N2050 Revision B Table 7-4. Pin Assignment - CN5 Table 7-4. Pin Assignment - CN5 Signal Name Signal Name Signal Name Signal Name DTCTX BE2X BE3X BE0X BE1X RESETX DREQX WAITX IREQX Appendix Connector Pin Diagram...
  • Page 220 EPSON EPL-N2050 Revision B Table 7-5. Description of Signals - CN5 Table 7-7. Pin Assignment - CN7 Signal Name Description Signal Name Signal Name D[31:0] Data bus CHASSI GND A [23:0] Address bus. A23 is not connected. SIGNAL GND Chip select signal...
  • Page 221 EPSON EPL-N2050 Revision B Table 7-9. Pin Assignment - CN8 Table 7-11. Pin Assignment - CN9 Signal Name Signal Name Signal Name Signal Name 1, 2 14-16 LED4X-LED6X S. GND VIDEOX LCDX S. GND PRFDX LCDCLK SRCLKX CMDX LCDWRX CPRDYX...
  • Page 222 EPSON EPL-N2050 Revision B Table 7-13. Pin Assignment - CN11 Table 7-15. Pin Assignment - CN12 Signal Name Signal Name Signal Signal DREQIX* DREQOX* DQ0-3 86-89 DQ32-35 NMIX RESETX 7-11 DQ4-8 91-95 DQ36-40 8, 9 AB4, AB3 16-19 LTCSX* 20-22...
  • Page 223 EPSON EPL-N2050 Revision B Table 7-15. Pin Assignment - CN12 Table 7-15. Pin Assignment - CN12 Signal Signal Signal Signal 80, 81 165-167 SA0-2 NC (DU) CKE0 CS2X CS3X Table 7-16. Description of Signals - CN12 46, 47 DQMB2, 3...
  • Page 224 EPSON EPL-N2050 Revision B Table 7-17. Pin Assignment CN13 Table 7-17. Pin Assignment CN13 Signal Name Signal Name Signal Name Signal Name A14 (NC) A15 (NC) A16 (NC) A17 (NC) INTRX (IDE_IRQX) WAITX (NC) RESETX (SRESETX) W/RX (NC) IOWRX (IO_WRX) IORDX (IO_RDX) Table 7-18.

  • Page 225: Pin Alignment

    EPSON EPL-N2050 Revision B 7.1.2 Pin Alignment The figure below shows wiring diagram of major component in this printer. Figure 7-2. Major Component Wiring Diagram Appendix Connector Pin Diagram...

  • Page 226: P/J Location Table And Map

    EPSON EPL-N2050 Revision B 7.1.3 P/J Location Table and Map Table 7-19. P/J Location Table Location Use the table and maps in this section to locate the specific P/J connectors Harness Notes within the printer. To find the location of a P/J:...
  • Page 227 EPSON EPL-N2050 Revision B Table 7-19. P/J Location Table Table 7-19. P/J Location Table Location Location Harness Notes Harness Notes Figure Location Name Figure Location Name Connects PWBA CONN, Connects ROS Harness PWBA CONN Sensor Photo:Regi. and Harness Assembly (SOS Assembly Regi.
  • Page 228 EPSON EPL-N2050 Revision B Table 7-19. P/J Location Table Table 7-19. P/J Location Table Location Location Harness Notes Harness Notes Figure Location Name Figure Location Name Connects PWBA LVPS Harness PWBA LVPS Fun Assembly Connects Toner Sensor and Fan Assembly.
  • Page 229 EPSON EPL-N2050 Revision B Table 7-19. P/J Location Table Location Harness Notes Figure Location Name Cassette Connects Motor Motor Assembly Assembly Assembly and Socket. Connects PWBA HVPS Wire Assembly PWBA HVPS and Chute Trans Assembly. Connects PWBA HVPS Wire Assembly...
  • Page 230 EPSON EPL-N2050 Revision B Figure 7-5. P/J Location Map 3 Figure 7-4. P/J Location Map 2 Appendix Connector Pin Diagram...

  • Page 231: Signal Information

    EPSON EPL-N2050 Revision B 7.1.4 Signal Information Table 7-20. Signal Name Signal Name Description Fan drive power that drives the Fan Assy with 2 voltages, 24V FAN ON for High speed and 5V for Low speed. Fuser control signal to switch AC power to the Heat Rod on and off.
  • Page 232 EPSON EPL-N2050 Revision B Table 7-21. Signal Name Signal Name Description Actuates the Cassette 1 Feed Solenoid (Normally LOW, and FAN ALARM HIGH when paper is fed). Figure 7-7. PWBA PS-200 (100) <=> Fan Assy, Switch Assy I/L Front, PWBA HKB 5VDC and PWB ES...
  • Page 233 EPSON EPL-N2050 Revision B Table 7-22. Signal Name - PWBA HKB MCU <=> PWBA HVPS Signal Name Description Control signal to switch the Charge Voltage for DC component of the CR and the PBR on and off. CR-DC Low: OFF, High: ON (applied charge voltage)
  • Page 234 EPSON EPL-N2050 Revision B Figure 7-10. PWBA HKB MCU <=> Sensor Photo: Exit, Figure 7-9. PWBA HKB MCU <=> Fuser Assy and Switch Assy I/L Rear Table 7-24. Signal Name Table 7-25. Signal Name Signal Name Description Signal Name Description Signal from the Sensor Exit.
  • Page 235 EPSON EPL-N2050 Revision B Table 7-26. Signal Name - PWBA HKB MCU <=> PWBA Size 1 Signal Name Description Option Feeder check signal which is transferred from the /TG MCU PWBA MCU FD TXD Control data which is transferred from the PWBA MCU...
  • Page 236 EPSON EPL-N2050 Revision B Table 7-27. Signal Name - PWBA HKB MCU <=> PWBA Size 1 <=> PWBA Feeder <=> Sensor Photo: Low Paper, Sensor Photo: Face Control, Clutch Assy Feed, Clutch Assy Turn and Motor Assy Signal Name Description Signal from the Sensor Photo:Low Paper.
  • Page 237 EPSON EPL-N2050 Revision B Table 7-28. Signal Name Signal Name Description +5V power source to the Laser Diode (0V when the CRU is 5VLD not in place.) Signal which activates the 5VLD circuit (0V when the CRU is /CRU not in place)
  • Page 238 EPSON EPL-N2050 Revision B Table 7-29. Signal Name - PWBA HKB MCU <=> PWBA Conn Signal Name Description Signal from the Sensor Photo:Paper Set. This signal is Low when /NO PRM the Sensor Photo:Paper Set is activated. /SOLM Control signal which activates the Solenoid Pick Up Signal from the Sensor Photo:Regi.
  • Page 239 EPSON EPL-N2050 Revision B Table 7-31. Signal Name Signal Name Description P.DATA Print Image Data /nP.DATA Print Image Data Control signal which determines the drive voltage for the Laser Diode. Control signal which determines the drive voltage for the /LDEN Laser Diode.

  • Page 240: Board Component Layout

    EPSON EPL-N2050 Revision B 7.2 Board Component Layout Figure 7-15. C305MAIN Component Layout Appendix Board Component Layout...

  • Page 241: Parts List And Exploded Diagram

    EPSON EPL-N2050 Revision B 7.3 Parts List and Exploded Diagram Table 7-32. Parts List Ref No. Part Code Description Table 7-32. Parts List H2.2.22 2033696 MOTOR ASSY Ref No. Part Code Description 02.2.30 1052012 INDICATOR S64.1.1 1051546 COVER LEFT H3.1.1...
  • Page 242 EPSON EPL-N2050 Revision B Table 7-32. Parts List Table 7-32. Parts List Ref No. Part Code Description Ref No. Part Code Description 05.1.99 2033469 KIT TONER SENSOR H10.1.7 2033484 SWITCH ASSY I/L REAR H6.1.1 2033470 BTR CHUTE ASSY H10.1.8 2033732 WIRE ASSY AC H6.1.2...
  • Page 243 The parts to which no reference number is assigned will not be available as after-sale service parts. EPL-N2050 (1.1) 10166 Rev.01...
  • Page 244 EPL-N2050 (1.2) 10166 Rev.01...
  • Page 245 The parts to which no reference number is assigned will not be available as after-sale service parts. EPL-N2050 (1.3) 10166 Rev.01...
  • Page 246 The parts to which no reference number is assigned will not be available as after-sale service parts. (in clude Fig 2.1) EPL-N2050 (2.1) 10166 Rev.01...
  • Page 247 The parts to which no reference number is assigned will not be available as after-sale service parts. (in clude 3pcs) EPL-N2050 (2.2) 10166 Rev.01...
  • Page 248 The parts to which no reference number is assigned will not be available as after-sale service parts. 99 (in clude a x 3pcs) EPL-N2050 (3.1) 10166 Rev.01...
  • Page 249 The parts to which no reference number is assigned will not be available as after-sale service parts. (in ciude Fig 4.1) EPL-N2050 (4.1) 10166 Rev.01...
  • Page 250 The parts to which no reference number is assigned will not be available as after-sale service parts. EPL-N2050 (5.1) 10166 Rev.01...
  • Page 251 The parts to which no reference number 99(with 2 and 7) is assigned will not be available as after-sale service parts. EPL-N2050 (6.1) 10166 Rev.01...
  • Page 252 The parts to which no reference number is assigned will not be available as after-sale service parts. EPL-N2050 (7.1) 10166 Rev.01...
  • Page 253 The parts to which no reference number is assigned will not be available as after-sale service parts. EPL-N2050 (8.1) 10166 Rev.01...
  • Page 254 The parts to which no reference number is assigned will not be available as after-sale service parts. EPL-N2050 (9.1) 10166 Rev.01...
  • Page 255 The parts to which no reference number is assigned will not be available as after-sale service parts. EPL-N2050 (10.1) 10166 Rev.01...

  • Page 256: Circuit Diagram

    EPSON EPL-N2050 Revision B 7.4 Circuit Diagram The following pages show the circuit diagrams for the C305 Main Board. Appendix Circuit Diagram...

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