Epson EPL-N2050 User manual

EPSONEPL-N2050
Monochrome Laser Printer
SEPG99009
®
SERVICE MANUAL
SERVICE MANUALSERVICE MANUAL
SERVICE MANUAL

Notice:
nAll 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 of SEIKO EPSON CORPORATION.
nThe contents of this manual are subject to change without notice.
nAll 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.
nThe above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences
thereof.
EPSON is a registered trademark of SEIKO EPSON CORPORATION.
General Notice: Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their
respective owners. EPSON disclaims any and all rights in those marks.
Copyright © 1999 SEIKO EPSON CORPORATION. Printed in Japan.

PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) Personal injury and 2) Damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE
OR REPAIR PROCEDURES.
2. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR
ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL
INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
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.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR
REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-
STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF
SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON
WARRANTY.
W ARNING
Signals a precaution which, if ignored, could result in
serious or fatal personal injury. Great caution should
be exercised in performing procedures preceded by a
WARNING heading.
CAUTION
Signals a precaution which, if ignored, could result
in damage to equipment.

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. PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of electrical and mechanical operations of the product.
CHAPTER 3. TROUBLESHOOTING
Provides the step-by-step procedures for troubleshooting.
CHAPTER 4. DISASSEMBLY AND ASSEMBLY
Describes the step-by-step procedures for disassembling and assembling the
product.
CHAPTER 5. ADJUSTMENT
Provides adjusting procedures.
CHAPTER 6. MAINTENANCE
Provides preventive maintenance procedures.
APPENDIX
Provides the following addition information for reference:
- Connector Pin Diagram
- Circuit Board Component Layout
- Parts List & Exploded Diagram
- Circuit Schematics

Revision Status
Revision Date of Issue Description
A December 2 , 1999 First Release
B January 13, 2000 Parts lists and exploded diagrams have been revised.
Disassembly procedures have been partly changed.

EPSON EPL-N2050 Revision B
6
Contents
Chapter 1 Product Description
1.1 Features ................................................................................................ 10
1.2 Specifications ....................................................................................... 12
1.2.1 Controller Specifications ............................................................. 12
1.2.2 Engine Specifications .................................................................. 13
1.2.3 Process Specification .................................................................. 17
1.2.4 Paper Specification ...................................................................... 18
1.2.5 Sensors ......................................................................................... 20
1.2.6 Reliability, Durability, Serviceability .......................................... 21
1.2.7 Operating Conditions .................................................................. 22
1.2.8 Storage Environment .................................................................. 22
1.2.9 Electrical Characteristics ............................................................. 23
1.2.10 Applicable Standards and Regulations ................................... 24
1.2.11 Consumables ............................................................................. 25
1.2.12 Maintenance .............................................................................. 25
1.2.13 External Dimension ................................................................... 26
1.2.14 Other Specifications .................................................................. 27
1.2.15 Configuration ............................................................................. 27
1.2.16 Host Interface Specifications .................................................... 28
1.3 Control Panel ....................................................................................... 32
1.3.1 Exterior View and Parts Name ................................................... 32
1.3.2 One Touch Setting Functions ..................................................... 33
1.3.3 Special Operation Functions ...................................................... 33
1.4 Notes on Operation ............................................................................. 34
1.4.1 Powering Off ................................................................................ 34
1.4.2 High-Temperature Components ................................................ 34
Chapter 2 Operating Principles
2.1 Overview .............................................................................................. 36
2.1.1 Electrophotographic Printing ..................................................... 36
2.1.2 Paper Path .................................................................................... 38
2.1.3 Drive Flow .................................................................................... 39
2.1.4 Main Component Function ......................................................... 43
2.1.5 Main Control Circuit .................................................................... 55
Chapter 3 Troubleshooting
3.1 Troubleshooting .................................................................................. 58
3.1.1 Service Flowchart ........................................................................ 58
3.1.2 FIP Flowchart ............................................................................... 60
3.2 Troubleshooting by Printer Message ................................................ 62
3.2.1 Details of Printer Messages
(New and Model-dependent) .................................................... 64
3.2.2 Service Call Errors ....................................................................... 67
3.2.3 RAM Expansion ........................................................................... 68
3.3 Troubleshooting by Printer Performance ......................................... 69
3.3.1 Inoperative Printer ....................................................................... 69
3.3.2 Erratic Operation ......................................................................... 71
3.3.3 Inoperative Drive Components .................................................. 71
3.4 Troubleshooting by Print Image Quality ........................................... 72
3.4.1 Light (Undertone) Print ............................................................... 73
3.4.2 Blank Print (No Image) ................................................................ 74
3.4.3 Black Print .................................................................................... 75
3.4.4 Vertical White Banding ............................................................... 76
3.4.5 Vertical Linear Deletions ............................................................. 77
3.4.6 Horizontal White Banding ........................................................... 78
3.4.7 Vertical Black Streaks .................................................................. 79
3.4.8 Horizontal Black Streaks ............................................................. 80
3.4.9 White Spots ................................................................................. 81

EPSON EPL-N2050 Revision B
7
3.4.10 Black Spots ................................................................................. 82
3.4.11 Ghost Print ................................................................................. 83
3.4.12 Dirty Background ....................................................................... 84
3.4.13 Skewed Image ........................................................................... 85
3.4.14 Damaged Print ........................................................................... 86
3.4.15 Unfused Image .......................................................................... 87
3.4.16 Misregistration ........................................................................... 88
3.5 Secondary FIPs .................................................................................... 89
Chapter 4 Disassembly and Assembly
4.1 Overview ............................................................................................ 103
4.1.1 Preparation ................................................................................. 103
4.1.2 Tools ........................................................................................... 103
4.1.3 Notations in the Manual ........................................................... 103
4.2 Disassembly and Assembly .............................................................. 104
4.2.1 Cover Left ................................................................................... 104
4.2.2 Cover Assy I/F ............................................................................ 105
4.2.3 Cover Assy Front ....................................................................... 106
4.2.4 Tray Assy MBF ........................................................................... 107
4.2.5 Cover Front L/H .......................................................................... 108
4.2.6 Cover Option .............................................................................. 109
4.2.7 Cover Assy Top .......................................................................... 110
4.2.8 Control Assy Panel .................................................................... 111
4.2.9 Cover Right ................................................................................ 112
4.2.10 Cap Envelope ........................................................................... 113
4.2.11 Stopper ..................................................................................... 114
4.2.12 Cover Rear ................................................................................ 115
4.2.13 Cassette Assy ........................................................................... 116
4.2.14 Clutch Assy Friction ................................................................. 117
4.2.15 Roll Assy ................................................................................... 118
4.2.16 Spring Retard ........................................................................... 119
4.2.17 Motor Assy ............................................................................... 120
4.2.18 Connector and Guide Socket .................................................. 121
4.2.19 Spring ....................................................................................... 123
4.2.20 Roll Assy Turn .......................................................................... 124
4.2.21 Spring Chute ............................................................................ 126
4.2.22 Actuator N/P ............................................................................. 127
4.2.23 Sensor Photo: Face Control, Low Paper ................................ 128
4.2.24 Feeder Assy ............................................................................. 129
4.2.25 Roll Assy .................................................................................. 131
4.2.26 PWBA Feeder ........................................................................... 132
4.2.27 Clutch Assy Feed ..................................................................... 134
4.2.28 Socket ....................................................................................... 136
4.2.29 Paper Feeder ............................................................................ 137
4.2.30 Chute MBF Assy ...................................................................... 138
4.2.31 Roll Assy MBF (with 3-6, 28) ................................................... 139
4.2.32 Roll Assy MBF .......................................................................... 141
4.2.33 Tray Bottom Assy .................................................................... 142
4.2.34 Actuator N/P MBF .................................................................... 144
4.2.35 Pad Assy Retard ...................................................................... 146
4.2.36 Sensor Photo: Paper Set ......................................................... 148
4.2.37 Solenoid Pick Up ..................................................................... 150
4.2.38 Spring MSI 300 ........................................................................ 151
4.2.39 Gear Pick Up ............................................................................ 152
4.2.40 Connector Assy ENV ............................................................... 153
4.2.41 Tray Bottom Pick Up ............................................................... 154
4.2.42 P/H Assy ................................................................................... 155
4.2.43 Roll Regi Rubber ...................................................................... 156
4.2.44 Actuator Regi ........................................................................... 158
4.2.45 Spring Sensor Regi ................................................................. 159
4.2.46 Sensor Photo: Regi .................................................................. 160
4.2.47 Spring Regi .............................................................................. 161
4.2.48 Gear Regi Metal ....................................................................... 162
4.2.49 Gear Regi Rubber .................................................................... 163
4.2.50 Clutch Regi ............................................................................... 164
4.2.51 Shaft 14 and Gear 14 ............................................................... 165
4.2.52 Toner Sensor ........................................................................... 166
4.2.53 BTR Assy .................................................................................. 167
4.2.54 Chute Trans Assy .................................................................... 168
4.2.55 Fuser Assy ................................................................................ 169
4.2.56 Harness Assy Fuser-M ............................................................ 170
4.2.57 Eliminator Assy Exit ................................................................ 172
4.2.58 Actuator Full Stack .................................................................. 173
4.2.59 Bearing Exit and Roll Assy MID-1 .......................................... 174
4.2.60 Bearing Exit and Roll Assy MID-2 .......................................... 176
4.2.61 Sensor Photo: Exit ................................................................... 178
4.2.62 Cover Interlock ......................................................................... 179
4.2.63 Motor Assy Exit ....................................................................... 180

EPSON EPL-N2050 Revision B
8
4.2.64 Chute Assy Exit ........................................................................ 181
4.2.65 CRU Top Guide Assy ............................................................... 182
4.2.66 ROS Assy .................................................................................. 183
4.2.67 Gear Assy Drive ....................................................................... 184
4.2.68 Motor Assy Main ..................................................................... 186
4.2.69 Sensor Assy CRU ..................................................................... 187
4.2.70 Plate Assy Left ......................................................................... 188
4.2.71 Fan Assy ................................................................................... 189
4.2.72 Plate Handle ............................................................................. 190
4.2.73 PWBA Size 1 ............................................................................. 191
4.2.74 Harness Assy Size M ............................................................... 192
4.2.75 Cover Size Sensor ................................................................... 193
4.2.76 Housing Size Sensor ............................................................... 194
4.2.77 PWB ESS .................................................................................. 195
4.2.78 Harness Assy OCT-M .............................................................. 196
4.2.79 Switch Assy I/L Rear ................................................................ 197
4.2.80 Harness Assy DUP-M .............................................................. 198
4.2.81 PWBA CONN ............................................................................ 200
4.2.82 Switch Assy I/L Front ............................................................... 201
4.2.83 PWBA MCU .............................................................................. 202
4.2.84 PWBA 5VDC ............................................................................. 204
4.2.85 PWBA PS .................................................................................. 205
4.2.86 Main Switch ............................................................................. 207
4.2.87 PWBA HVPS ............................................................................. 208
Chapter 5 Adjustment
Chapter 6 Maintenance
6.1 Overview ............................................................................................ 213
6.1.1 Maintenance by Users .............................................................. 213
6.1.2 Maintenance by Service Personnel .......................................... 213
Chapter 7 Appendix
7.1 Connector Pin Diagram ..................................................................... 217
7.1.1 Connectors - C305MAIN ............................................................ 217
7.1.2 Pin Alignment ............................................................................ 225
7.1.3 P/J Location Table and Map ..................................................... 226
7.1.4 Signal Information .................................................................... 231
7.2 Board Component Layout ................................................................ 240
7.3 Parts List and Exploded Diagram .................................................... 241
7.4 Circuit Diagram .................................................................................. 256

CHAPTER
1
PRODUCTDESCRIPTION

EPSON EPL-N2050 Revision B
Product Description Features 10
1.1 Features
EPL-N2050 is a non-impact page printer, using the laser and electro-
photographic technology. The following shows features of the printer.
This manual also contains specifications for the Optional Units: Duplex Unit,
Shifter, Envelope Feeder, and Large Capacity Paper Unit. Refer to the Service
Manual of Optional Units for the detailed specifications of the Multibin Unit.
Figure 1-1. External Appearance of EPL-N2050
ENGINE FEATURES
oHigh-speed and high-reliability A4 engine.
oResolution of 1200 dpi with printing speed of 20 ppm (A4) and 21 ppm
(Letter).
oStandard paper supply includes one universal cassette (550 sheets)
and the multiple purpose tray (100 sheets).
oWide range of options for paper source and output bins:
Universal Cassette (550 sheets) x 2, Duplex Unit, Envelope Feeder,
Multibin Unit, and Shifter.
CONTROLLER FEATURES
oHigh-speed controller VR4310 / 166.7MHz CPU.
o16 MB RAM as standard.
Expandable to 256 MB using commercially available SDRAM DIMM.
oThree standard interfaces:
- IEEE 1284 parallel interface
- RS232 serial interface
- Ethernet interface (100Base-TX)
oStoring data of the entire job in HDD and RAM enables high speed
multiple collate function by transferring data only once.
oOne slot for Type B interface (Level 3).
oOne slot for Token Ring interface.
(Optional for dealers or EPSON sales companies. Cannot be used with
Type B interface at the same time.)
oEnhanced Micro Gray support.
SOFTWARE FEATURES
1. Emulation installed.
PCL5e Paper handling support
PCLXL 1200 dpi support (Protocol 2)
ESC/Page 1200 dpi support, Enhanced Micro Gray support
(disabled when printing in 1200 dpi), paper
handling support, Page96 supported.
FX (FX-880), ESCP2 (LQ-2170), I239X (IBM239Plus)
Paper handling support
PJL, EJL
PostScript Level3* 1200 dpi support (refer to Adobe PS 3 kit Product
Specifications)
RCC Firmware updating function
*PostScript Level3 is optional, and it will be installed in Slot A or B.
Dedicated to EPL-N2050.

EPSON EPL-N2050 Revision B
Product Description Features 11
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.

EPSON EPL-N2050 Revision B
Product Description Specifications 12
1.2 Specifications
1.2.1 Controller Specifications
CPU
oRISC CPU VR4310 166.7MHz
RAM
oSDRAM 64bit width DIMM (168 pin, 3.3V)
n Standard 16 MB
n DIMM Option 8 MB*, 16 MB, 32 MB, 64 MB, 128 MB,
256 MB (SDRAM type, 1 slot)
Maximum 256 MB
*8 MB is scarcely distributed, and therefore it is not stated in the
catalog or specifications.
ROM
oFonts 4 Mbytes (mounted on the main board)
oProgram 4 Mbytes (mounted on the flash ROM DIMM
board)
Program data is compressed. Decompressed on
the RAM and executed when it is called.
oExpansion ROM Two ROM DIMM slots (can be mounted and
removed when the power is off)
Slot A: PS3 or option fonts
Slot B: PS3 or option fonts
Only one piece of PS3 can be mounted, and only
one piece of ROM DIMM can be installed.
HOST INTERFACES
oStandard Parallel: IEEE 1284 compliant, bi-directional, B-type
connector, compatibility, nibble, ECP
Ethernet: 10BaseT/100BaseTX
RS232C serial interface
oOption Type B I/F 1 slot
Token Ring 1 slot (dealer option)
Type B and Token Ring cannot be used together.
Token Ring and standard network interface cannot
be used together.
PRINTER SETTING
oBy EJL, PJL, HTTP, SNMP and ENPC.
Memory element EEPROM serial type 16 KB
CONTROL PANEL
o8 switches, 6 LEDs, 20-character LCD
MOUNTING
oFixed to main unit.
HDD OPTION
oIDE type. 6GB.
MISCELLANEOUS
oMechanical control function is not built in.

EPSON EPL-N2050 Revision B
Product Description Specifications 13
1.2.2 Engine Specifications
oPrinting Method Electrophotographic method using scanning
semiconductor laser beam and dry one-
component toner.
oResolution 600 dpi/1200 dpi (switching with engine)
oPrinting Speed Applies to MP tray, cassette 1 and
cassette 2/3 (option).
*
1
Duplex printing speed is in the case of 2 sheet batch mode.
*
2
Switching with paper type setting.
*
3
In the case of continuous printing, up to 20 sheets
(TBD for over 21 sheets).
oFirst Printing Time
*Upper Tray: one sheet batch mode
Lower Tray: two sheet batch mode
oWarm-Up Time 65s max. (at 22°C, 100V/220V, rated voltage)
Table 1-1. Printing Speed
Paper Size One-Side Printing
(ppm) Duplex Printing*1
(ppm)
Letter (LT) 21 14.5
A4 20 13.5
Legal 14” (LGL) 17 11.5
Legal 13” (GLG) 17 12
Executive (EXE) 21 15
B5 21 15
Thick Paper*217 --
OHP Film*217 --
Envelope*39--
Table 1-2. First Printing Time
Size MP Tray (sec) Cassette 1 (sec) Cassette 2 (sec) Cassette 3 (sec)
One-
Side
Printing
Duplex
Printing*
One-
Side
Printing
Duplex
Printing*
One-
Side
Printing
Duplex
Printing*
One-
Side
Printing
Duplex
Printing*
LT 13.2 20.5
21.5 13.2 20.5 21.5 14.4 21.7 22.7 15.6 22.9 23.9
A4 13.3 20.8
22.6 13.3 20.8 22.6 14.5 22.0 23.8 15.7 23.2 25.0

EPSON EPL-N2050 Revision B
Product Description Specifications 14
oPaper Supply
*
1
Curls of postcards and envelopes are corrected within 5mm.
*
2
Refer to Section 1.2.13.1 for feeding direction of envelopes.
oMaximum Paper Supply Capacity*1
*
1
Upper Tray: 75g/m
2
or 80g/m
2
, Lower Tray: 64g/m
2
*
2
Option
Table 1-3. Paper Supply
Paper Supply
Method Capacity Paper Size Paper Thickness
Standard
MP Tray
100 sheets Standard Paper Xerox-4042 (LT)
Xerox-RX80 (A4) 75g/m2
(20lb)
120 sheets Standard Paper FX-L (A4) 64g/m2
30 sheets Japanese Official Postcard*1190g/m2
OHP, Labels --
10 sheets Envelopes (Monarch, C10, DL, C5)*1,2 --
Height
11.5mm Standard or custom size shown 1-10 60-216g/m2
(16-80lb)
Cassette 1
550 sheets Standard Paper Xerox-4024 (LT)
Xerox-RX80 (A4)
75g/m2
(20lb)
80g/m2
600 sheets Standard Paper FX-L (A4) 64g/m2
200 sheets Japanese Official Postcard*1190g/m2
OHP, Labels --
Height
60mm Envelopes (Monarch, C10, DL, C5)*1,2 --
Height
60mm Standard or custom size shown 1-10 60-105g/m2
(16-28lb)
Option
Cassette 2 Same specification as Cassette 1.
Cassette 3
Envelope
Feeder
75 sheets Envelopes (Monarch, C10, DL, C5)*1,2 60-105g/m2
(16-28lb)
50 sheets Envelopes (C5)*1,2
100 sheets Japanese Official Post Card*1190g/m2
Height
24mm Standard or custom size shown 1-10 60-105g/m2
(16-28lb)
Table 1-4. Max. Paper Supply Capacity
Combination MP Tray Cassette 1 Cassette 2*2Cassette 3*2Total
1
(Standard
Component)
100 sheets
120 sheets 550 sheets 600 sheets -- -- 650 sheets 720 sheets
2100 sheets
120 sheets 550 sheets 600 sheets 550 sheets 600 sheets -- 1200 sheets 1320 sheets
3100 sheets
120 sheets 550 sheets 600 sheets 550 sheets 600 sheets 550 sheets 600 sheets 1750 sheets 1920 sheets

EPSON EPL-N2050 Revision B
Product Description Specifications 15
oPaper Size
*
1
Cassette 2 and 3 are optional items.
¦ : Can be fed.
¤ : Auto paper size detection.
Table 1-5. Paper Size
Paper Type Paper Size Japan Abroad MP
Tray Cassette 1, 2, 3*1Duplex Printing
Standard
Paper
A4 210.0 x 297.0mm
(8.27 x 11.69”) ¦¦¦ ¤ ¦
A5 148.0 x 210.0mm
(5.83 x 8.27”) ¦ ¦ ¦ ¤ --
B5 182.0 x 257.0mm
(7.16 x 10.12”) ¦¦¦ ¤ --
ISO-B5 176.0 x 250.0mm
(6.93 x 9.84”) ¦ ¦ ¦ ¦ --
Letter
(LT) 215.9 x 279.4mm (8.5 x 11.0”) ¦¦¦ ¤ ¦
Half Letter
(HLT) 139.7 x 215.9mm (5.5 x 8.5”) ¦ ¦ ¦ ¦ --
Legal 13” 215.9 x 330.2mm
(8.5 x 13.0”) ¦¦¦ ¤ ¦
Legal 14” 215.9 x 355.6mm
(8.5 x 14.0”) ¦ ¦ ¦ ¤ ¦
EXE 184.2 x 266.7mm ¦¦¦ ¤ ¦
F4 210.0 x 330mm
(8.27 x 13”) ¦ ¦ ¦ ¦ --
Special
Paper
COM10 104.8 x 241.3mm
(4.13 x 9.5”) ¦¦¦ ¦ --
Monarch 98.4 x 190.5mm
(3.88 x 7.5”) ¦ ¦ ¦ ¦ --
C5 162.0 x 229.0mm
(6.38 x 9.02”) ¦¦¦ ¦ --
DL 110.0 x 220.0mm
(4.33 x 8.66”) ¦ ¦ ¦ ¦ --
Index
(3” x 5”) 76.2 x 127.0mm (3 x 5”) -- ¦¦ -- --
Japanese
Official
Postcard 100.0 x 148.0mm ¦-- ¦ ¦ --
Label
A4 210.0 x 297.4mm
(8.27 x 11.69”) ¦¦¦ ¦ --
LT 215.9 x 279.4mm
(8.5 x 11.0”) ¦ ¦ ¦ ¦ --
OHP
A4 210.0 x 297.0mm
(8.27 x 11.69”) ¦¦¦ ¦ --
LT 215.9 x 279.4mm
(8.5 11.0”) ¦ ¦ ¦ ¦ --
Table 1-5. Paper Size (continued)
Paper Type Paper Size Japan Abroad MP
Tray Cassette 1, 2, 3*1Duplex Printing

EPSON EPL-N2050 Revision B
Product Description Specifications 16
oConsumables Imaging Cartridge
oApplicable Paper Size to Feed:
oPaper Feed Standard Center-line reference for each paper size.
oOutput Paper Capacity
*
1
Off-set Deal = More than 10mm
oDimension
Main Unit: 422 (W) x 439 (D) x 413 (H) mm
Optional Units:
*1 When the extension output tray is extended.
*2 When exit chute and extension output tray are extended.
*3 When extension feed tray is extended.
*4 Installed inside the main unit.
oWeight
Main Unit: 26 kg
Main Unit + Imaging Cartridge: 27.7 kg
Optional Units:
LCP Unit: 9.8 kg
Shifter: 2.5 kg
Envelope Feeder: 1.8 kg
Duplex Unit: 1.2 kg
Table 1-6. Applicable Paper Size to Feed
Paper Width Paper Length
Standard MP Tray 76.2-215.9mm
(3-8.5 inch) 127-355.6mm (5-14 inch)
Cassette 1 98.4-215.9mm
(3.87-8.5 inch) 148.5-355.6mm (5.85-14 inch)
Option Cassette 2 and 3 98.4-215.9mm
(3.87-8.5 inch) 148.5-355.6mm (55.85-14 inch)
Envelope
Feeder 98.4-178.0mm 148.5-254.0mm
Table 1-7. Output Paper Capacity
Paper Output
Method Capacity Paper Size Usable Paper Thickness
Standard Face
Down 500 sheets
Standard Paper Xerox-4024 (LT)
Xerox-RX80 (A4) 75g/m2(20lb)
80g/m2
Standard Paper FX-L (A4) 64g/m2
Option Shifter*1
500 sheets
Standard Paper Xerox-4024 (LT)
Xerox-RX80 (A4) 75g/m2(20lb)
80g/m2
Standard Paper FX-L (A4) 64g/m2
Paper Width: 98.7-215.9mm (3.87-
8.5 inch)
Paper Length: 148.5-355.6mm
(5.85-14 inch)
Table 1-8. Optional Unit Dimension
Width (mm) Depth (mm) Height (mm)
LCP Unit 422 433 175
Shifter 422 293 (455*1)142 (234*2)
Envelope Feeder 289 290 (343*3) 116
Duplex Unit*4315 250 98

EPSON EPL-N2050 Revision B
Product Description Specifications 17
oPower Supply
100V Model: 100V/120V 90-132V (50-60Hz ±3Hz)
200V Model: 220V/240V 198-264V (50-60Hz ±3Hz)
oPower Consumption*1
*
1
Controller Supply: 3.3V/5A, 5V/2.5A
*
2
Controller Consumption: 10W(3.3V/3A)
oMachine Life: 600,000 pages or 5 years, whichever comes
earlier.
oAcoustic Noise (based on ISO7779):
*1 Measurement is done with MP Tray closed.
*2 Options: Duplex Unit, Cassettes 2 and 3, Envelope Feeder, and
Shifter.
oOzone Concentration TBD (Less than 0.01ppm, in accordance
with Blue Angel).
oToxicity OPC, toner, and plastics materials are all
non-toxic.
1.2.3 Process Specification
oMethod Electrophotographic method using dry one-
component developing.
oLight Source Laser Diode
oPhotoconductor Unit OPC (Organic Photo Conductor) Drum
oCharging Roller Charging Method
oDeveloping Exposed Area Development
oToner One-component magnetic toner
oTransfer Method Roller Transfer
oFixing Heat Roller
oDensity Adjustment Laser Power Variable (adjustment with video
command is possible.)
Table 1-9. Power Consumption
100V 120V 220-240V
Max Rated Current 8A 6.66A 3.33A
Power
Consumption
Maximum 800W 800W 800W
Continuous Printing (Average) TBD 386W 315W
Stand-by
(Average) Heater ON TBD 96W 95W
Power Save
(Average) Heater OFF*230W 30W 30W
Table 1-10. Acoustic Noise
Stand-by Power Saving Printing
Main Unit*1 35 dB (A) Background Noise 49.5 dB
Main Unit + Option*2 -- -- 53.0 dB

EPSON EPL-N2050 Revision B
Product Description Specifications 18
1.2.4 Paper Specification
oPaper Type
n Standard Paper Xerox 4024 (75 g/m
2
), RX-80 (80 g/m
2
)
n Plain Paper
60 g/m
2
- 105 g/m
2
(16 lb - 28 lb)
Photocopier paper, bond paper, recycled paper
n Special Paper
Labels, Japanese official postcards, transparency films, Colored
paper, thick paper, DTP paper, letter-head
Note 1 lb: Ream weight = lb/500 sheets/17”x22” (431.8 x 558.8mm)
g/m
2
: 1 g/m
2
= 0.2659763 lb
Note 2 Do not use any of the paper types listed below with this printer.
They may cause defective printing, paper blockages, or damage
to the printer.
- Carbon paper, non-carbon paper, thermal paper, pressure-
sensitive paper, acidic paper
- Paper previously printed in a thermal printer or inkjet printer
- Extra thick or extra thin paper
- Damp paper
- Surface-coated paper or surface treated color paper.
- Extra smooth or glossy paper. Extra rough paper. Paper with
significantly different roughness on each surface.
- Paper with punched holes or perforations.
- Folded, curled, or tom paper.
- Irregularly shaped paper or paper with non-perpendicular
corners.
- Sheets of labels that peel off easily.
- Paper with glue, staples, or clips attached.
- Special inkjet paper (superfine paper, glossy film, etc.)
- OHP film for color laser printers or photocopiers.
- Sheets already printed on other color or black/white laser
printers or photocpiers.
- Sheets of paper stuck together.
Note 3 When printing on some postcards with pre-printed pictures, the
paper may not feed correctly due to paper particles adherring to
the paper-feed roller. If this occurs, clean the printer as described
in Section 1.2.12 “Maintenance”.
oPaper Batch Division
* Option
lPaper feeding reliability and image quality guaranteed.
uPaper feeding reliability and image quality guaranteed.
Restricted to normally used paper types.
X Paper feeding not possible.
Table 1-11. Paper Batch Division
Standard
Paper Plain Paper
Special Paper
OHP Japanese
Official
Postcards Labels Thick
Paper Evnvelopes
MP Tray luu luu u
Cassette
1/*2/*3 lu u lu u u
Env.
Feeder* XXXlXX u
Duplex
Unit* luX X X X X

EPSON EPL-N2050 Revision B
Product Description Specifications 19
oPrinting 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)
Figure 1-2. Printing Area
Guaranteed
Printing Area
4mm
a2
4mm
a1 b
4mm
4mm
c2 dc1

EPSON EPL-N2050 Revision B
Product Description Specifications 20
1.2.5 Sensors
Table 1-12. Sensors
Unit Detected Item Detection Method Comments
Imaging Cartridge
Mounted/unmounted Exist
Genuine SEC product
Combination of SW
on the main unit
and Key on the
cartridge.
Toner near end Automatic detection with magnetic
sensor.
Detects residual
volume approx.
3.3%
(A4/5% duty: 500
pages)
Standard
Paper
Feeders
MP Tray Out of paper Automatic detection
by photosensor and
actuator.
Cassette 1
Cassette
mounted/unmounted By sensor SW.
Out of paper By photosensor and
actuator.
Residual paper By photosensor and
actuator. Detects 50 ± 30 sheets.
Paper size By sensor switches. 7 sizes
Optional
Paper
Feeders
Cassette
Unit Same as Cassette 1.
Envelope
Feeder
Unit
mounted/unmounted Automatic detection by connector.
Out of paper Automatic detection by photosensor and
actuator.
Standard
Paper
Output
Units
Face
Down Full detection Automatic detection
by photosensor and
actuator.
Optional
Paper
Output
Units
Duplex
Unit Unit mounted/unmounted Automatic detection by connector.
Shifter
Unit
mounted/unmounted Automatic detection by connector.
Full detection Automatic detection by photosensor and
actuator.
Table 1-12. Sensors
Unit Detected Item Detection Method Comments