Page 1
SERVICE MANUAL
Color Inkjet Printer
EPSON STYLUS CX4300/CX4400/CX5500/
CX5600/DX4400/DX4450
SEMF07-004
Page 2
Notice:
All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.
The contents of this manual are subject to change without notice.
All effort 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.
The 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 © 2007 SEIKO EPSON CORPORATION.
Imaging Products CS, PL & Environmental Management
Page 3
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage to the equipment.
DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures
preceded by DANGER Headings.
WARNING Signals a precaution which, if ignored, could result in 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. NO WORK 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.
4. WHEN DISASSEMBLING OR ASSEMBLING A PRODUCT, MAKE SURE TO WEAR GLOVES TO AVOID INJURY FROM METAL PARTS WITH SHARP
EDGES.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE 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 NON-APPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.
6. WHEN USING COMPRESSED AIR PRODUCTS; SUCH AS AIR DUSTER, FOR CLEANING DURING REPAIR AND MAINTENANCE, THE USE OF SUCH
PRODUCTS CONTAINING FLAMMABLE GAS IS PROHIBITED.
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About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance, and repair procedures of the printer. The instructions and procedures included
herein are intended for experienced repair technicians, and attention should be given to the precautions on the preceding page.
Manual Configuration
This manual consists of six chapters and Appendix.
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
Describes the step-by-step procedures for the troubleshooting.
CHAPTER 4. DISASSEMBLY / ASSEMBLY
Describes the step-by-step procedures for disassembling and
assembling the product.
CHAPTER 5. ADJUSTMENT
Provides Epson-approved methods for adjustment.
CHAPTER 6. MAINTENANCE
Provides preventive maintenance procedures and the list of Epsonapproved lubricants and adhesives required for servicing the product.
CHAPTER 7. APPENDIX
Provides the following additional information for reference:
• Connector Summary
• Electrical Circuits
Symbols Used in this Manual
Various symbols are used throughout this manual either to provide additional
information on a specific topic or to warn of possible danger present during a
procedure or an action. Be aware of all symbols when they are used, and always read
NOTE, CAUTION, and WARNING messages.
W A R N I N G
C A U T I O N
C H E C K
P O I N T
A D J U S T M E N T
R E Q U I R E D
Indicates an operating or maintenance procedure, practice or condition
that, if not strictly observed, could result in injury.
Indicates an operating or maintenance procedure, practice, or condition
that, if not strictly observed, could result in damage to, or destruction of,
equipment.
May indicate an operating or maintenance procedure, practice or
condition that is necessary to accomplish a task efficiently. It may also
provide additional information that is related to a specific subject, or
comment on the results achieved through a previous action.
Indicates an operating or maintenance procedure, practice or condition
that is necessary to maintain the product’s quality.
Indicates that a particular task must be carried out according to a certain
standard after disassembly and before re-assembly, otherwise the quality
of the components in question may be adversely affected.
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Revision Status
Revision Issued Date Description
A April 23, 2007 First Release
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
CONTENTS
Chapter 1 PRODUCT DESCRIPTION
1.1 Overview .............................................................................................................. 9
1.1.1 Features...................................................................................................... 9
1.2 Specifications ..................................................................................................... 10
1.2.1 Printing Specifications............................................................................. 10
1.2.2 Scanning Specifications........................................................................... 15
1.2.3 Standalone Copying Specifications......................................................... 16
1.2.4 Electrical Specifications .......................................................................... 18
1.2.5 Environmental Conditions ....................................................................... 18
1.2.6 Durability................................................................................................. 19
1.2.7 Acoustic Noise......................................................................................... 19
1.2.8 Safety approvals (Safety standards/EMI) ................................................ 19
1.2.9 Interface ................................................................................................... 19
1.2.10 Control Panel ......................................................................................... 20
1.2.11 Button Functions in Stand-alone Copy.................................................. 21
1.2.12 Errors and Panel Status.......................................................................... 21
1.2.13 Power Save Mode .................................................................................. 22
1.2.14 Nozzle Check Pattern Print ................................................................... 22
1.2.15 Printer Initialization (T.B.D) ................................................................. 22
Chapter 2 OPERATING PRINCIPLES
2.1 Overview ............................................................................................................ 24
2.2 Printer Mechanism.............................................................................................. 24
2.2.1 Printhead Specifications .......................................................................... 25
2.2.2 Carriage Mechanism................................................................................ 25
2.2.3 Paper Feeding Mechanism ...................................................................... 26
2.2.4 Ink System Mechanism ........................................................................... 27
2.3 Scanner Mechanism............................................................................................ 28
2.3.1 Scanner Carriage Mechanism .................................................................. 28
2.4 Electrical Circuit Operating Principles............................................................... 30
2.4.1 Power Supply Board................................................................................ 30
2.4.2 Main Board .............................................................................................. 30
Chapter 3 TROUBLESHOOTING
3.1 Overview ............................................................................................................ 33
3.2 Error Indications and Fault Occurrence Causes................................................. 33
3.3 Troubleshooting.................................................................................................. 37
3.3.1 Superficial Phenomenon-Based Troubleshooting ................................... 53
Chapter 4 DISASSEMBLY/ASSEMBLY
4.1 Overview ............................................................................................................ 61
4.1.1 Precautions .............................................................................................. 61
4.1.2 Tools........................................................................................................ 61
4.1.3 Work Completion Check......................................................................... 62
4.1.4 Caution After Repair (T.B.D).................................................................. 63
4.2 Disassembly Procedures..................................................................................... 64
4.3 Printer Section.................................................................................................... 65
4.3.1 Paper Support Assy. ................................................................................ 65
4.3.2 Stacker Assy............................................................................................ 65
4.3.3 Document Cover/ASF Cover/Support Arm ............................................ 66
4.3.4 Scanner Unit/Middle Case/Panel Unit .................................................... 67
4.4 Removing Printer Mechanism............................................................................ 71
4.5 Removing Board................................................................................................. 73
4.5.1 Main Board.............................................................................................. 73
4.6 Disassembling Printer Mechanism..................................................................... 75
4.6.1 Printhead.................................................................................................. 75
4.6.2 Hopper..................................................................................................... 78
4.6.3 CR Scale.................................................................................................. 79
4.6.4 CR Motor................................................................................................. 80
4.6.5 CR Unit/Timing Belt............................................................................... 81
4.6.6 Ink System removal................................................................................. 83
4.6.7 Power Supply Board................................................................................ 85
4.6.8 EJ Frame Assy/EJ Roller......................................................................... 86
4.6.9 Main Frame ............................................................................................. 87
4.6.10 LD Roller/ASF Unit.............................................................................. 90
4.6.11 Waste Ink Pads ...................................................................................... 92
4.6.12 PF Roller................................................................................................ 93
4.6.13 PF Motor................................................................................................ 94
6
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.7 The Shortest Way to Remove the Main Frame. ................................................. 95
4.8 Scanner Section .................................................................................................. 96
4.8.1 Upper Scanner Housing........................................................................... 96
4.8.2 CIS Assy./CIS Carrier Assy./Scanner FFC ............................................. 97
4.8.3 Scanner Motor Unit/Driven Pulley.......................................................... 99
Chapter 5 ADJUSTMENT
5.1 Adjustment Items and Overview (T.B.D) ........................................................ 101
5.1.1 Servicing Adjustment Item List (T.B.D) ............................................... 101
5.1.2 Replacement Part Adjustment Items (T.B.D)........................................ 103
5.2 Adjustment by Using Adjustment Program (T.B.D)........................................ 105
5.2.1 Head angular adjustment ....................................................................... 105
5.2.2 Top Margin Adjustment ........................................................................ 106
5.2.3 Bi-D Adjustment ................................................................................... 106
5.2.4 First Dot Adjustment ............................................................................. 107
5.2.5 PF Band Adjustment.............................................................................. 107
Chapter 6 MAINTENANCE
6.1 Overview .......................................................................................................... 109
6.1.1 Cleaning ................................................................................................. 109
6.1.2 Service Maintenance ............................................................................. 109
6.1.3 Lubrication ............................................................................................ 111
Chapter 7 APPENDIX
7.1 Connector Summary......................................................................................... 116
7.1.1 Major Component Unit.......................................................................... 116
7.2 Exploded Diagram / Parts List ......................................................................... 119
7.3 Electrical Circuits............................................................................................. 120
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PRODUCT DESCRIPTION
CHAPTER
1
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.1 Overview
This unit provides the three primary functions; computer-connected printer, scanner,
and stand-alone copy machine, and is designed for home/personal use.
Its main functions are described below:
1.1.1 Features
Printer functions
As a printer, this unit achieves high-quality output at high speed on plain papers.
It includes the following features:
Maximum print resolution: 5760 (H) x 1440 (V) dpi
Separate ink cartridge for each color
ASF (Auto Sheet Feeder) holds up to 80 cut sheets
(paper thickness: 0.11 mm)
Borderless printing with EPSON special media
This unit use pigment ink which is water resistant, light-fast and ozone
resistant
Scanner functions
This unit provides scan mode so that data is scanned and transferred to a connected
computer or to e-mail via application software like EPSON SMART PANEL.
CIS sensor requires no warm-up period, which makes scanning more convenient
and allows for a more compact scanner. Additional features include the following:
Copy margin is automatically selected from two options, related to paper type
and paper size; Standard Copy (3mm-margin), or Borderless copy.
Simultaneous use of functions
Printer functions and scanner functions are independent and can therefore be
operated simultaneously from a connected computer.
Easy-to-use control panel
The control panel that has five buttons including power button and three LEDs
simplifies operation.
Exterior
Use of a CIS sensor makes the scanner body more compact.
Also, the control panel on the left side makes the printer distinctive in appearance
but still easier to use.
Dimension: 452 mm (W) x 347 mm (D) x 203 mm (H)
(including rubber feet with Paper Support and Stacker closed)
Weight: 5.0 kg (without ink cartridges)
Maximum optical resolution: 600 x 1200 dpi
Scan gradations: 16 bits (input), 1 or 8 bits (output)
Stand-alone copy functions
Paper size can be selected from two or three options:
Table 1-1. Paper Size
Market Paper Size
EAI Letter/4”x6”
Europe/Asia/Pacific A4/4”x6”
Latin Letter/A4/4”x6”
Enlarge/Reduce factor can be selected from two options; actual size (100%)
or “Fit to page”
Figure 1-1. External View
PRODUCT DESCRIPTION Overview 9
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2 Specifications
1.2.1 Printing Specifications
Table 1-2. Printing Specifications
Item Specification
Print method On-demand ink jet
Nozzle configuration
Print direction
Print resolution
Control code
Internal font (T.B.D)
Input buffer size 32 Kbytes
Paper feed method Friction feed, using one ASF (Auto Sheet Feeder)
Paper path Top feed, front out
Paper feed rates (T.B.D)
PF interval Programmable in 0.017 mm (1/1440 inch) steps
Note * : Those resolution can only be selected in the printer driver.
Black: 90 nozzles
Color: 29 nozzles x 3 (Cyan, Magenta, Yellow)
Bi-directional minimum distance printing
(logic seeking)
Horizontal x Vertical (dpi)
• 360 x 120 • 720 x 720
• 360 x 360 • 1440 x 720
• 360 x 720
• ESC/P Raster command
• EPSON Remote command
Character code: Alphanumeric with expanded
Font: EPSON original font
• High quality mode, 19.05-mm feed
• High speed mode, continuous feed
*
• 5760 x 1440
graphics (PC437)
ASCII, 20H to 7FH only
Alphanumeric font: Courier
98.8 mm/sec (3.89 inch/sec)
352.8 - 6.35 mm/sec (13.89-0.25 inch/sec)
*
*
INK CARTRIDGE SPECIFICATIONS
The product numbers of the EPSON ink cartridges for this printer are shown below.
Table 1-3. Product No. of Ink Cartridges
Color US Latin West Europe CISMEA Asia
Black T0881
Cyan T0882
Magenta T0883
Yellow T0884
T0731
T0901
T0732
T0902
T0733
T0903
T0734
T0904
T0711 T0921
T0712 T0922
T0713 T0923
T0714 T0924
Shelf life (T.B.D):
Two years from production date (if unopened), six months after opening package.
Storage Temperature
Table 1-4. Storage Temperature (T.B.D)
Situation Storage Temperature Limit
When stored in individual boxes
When installed in main unit
-30 oC to 40 oC
o
F to 104oF)
(-22
-20 oC to 40 oC
(-4oF to 104oF)
1 month max. at 40 oC (104oF)
Dimension
12.7 mm (W) x 68 mm (D) x 47 mm (H)
C A U T I O N
The ink cartridge cannot be refilled.
Do not use expired ink cartridges.
The ink in the ink cartridge freezes at -16 °C (3.2 oF). It takes
about three hours under 25 °C (77
o
F) until the ink thaws and
becomes usable.
T0731
T0911
T0732
T0912
T0733
T0913
T0734
T0914
PRODUCT DESCRIPTION Specifications 10
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
PRINT MODE
Print Mode
Fast Economy*2360 x 120
Economy 360 x 120
Normal 360 x 360
Fine
Super Fine 360 x 720
Photo (720)
Best Photo
(1440)
Photo RPM
(5760)
Resolution
(H x V) dpi
360 x 720
(Color)
720 x 720
(Black)
720 x 720
(Color)
1440 x 720
(Black)
720 x 720
1440 x 720
5760 x 1440
Table 1-5. Print Mode (Color)
Dot Size
*1
(cps)
Eco
(360 cps)
Eco
(360 cps)
VSD1
(165 cps)
VSD2’
(240 cps)
VSD2
(240 cps)
VSD3’
(240 cps)
VSD2
(240 cps)
VSD3
(240 cps)
VSD3
(240 cps)
Plain paper -
Plain paper -
Plain paper -
Plain paper -
Premium Glossy Photo Paper
Glossy Photo Paper
Plain paper -
Premium Glossy Photo Paper
Glossy Photo Paper
Matte Paper-Heavyweight
Ultra Glossy Photo Paper
Premium Glossy Photo Paper
Premium SemiGloss Photo Paper
Glossy Photo Paper
Matte Paper-Heavyweight
Ultra Glossy Photo Paper
Premium Glossy Photo Paper
Premium SemiGloss Photo Paper
Glossy Photo Paper
Media
Border-
less
OK
OK
OK
-
Table 1-6. Print Mode (Black)
Print Mode
Fast Economy*2360 x 120
Economy 360 x 120
Normal 360 x 360
Fine 720 x 720
Photo (720) 720 x 720
Best Photo
(1440)
Note *1: CPS: Characters per second
*2: This mode skips a sequence to prevent paper skewing in paper loading sequences.
Resolution
(H x V) dpi
1440 x 720
Dot Size
*1
(cps)
Eco
(360 cps)
Eco
(360 cps)
VSD1
(165 cps)
VSD2
(240 cps)
VSD2
(240 cps)
VSD3
(240 cps)
Media
Plain Paper -
Plain Paper -
Plain Paper -
Plain Paper -
Matte Paper-Heavyweight OK
Matte Paper-Heavyweight OK
Border-
less
Note *1: CPS: Characters per second
*2: This mode skips a sequence to prevent paper skewing in paper loading sequences.
PRODUCT DESCRIPTION Specifications 11
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
PAPER SUPPORT
The table below lists the paper type and sizes supported by the printer. The Supported paper type and sizes vary depending on destinations (between EAI, EUR, and Asia).
Table 1-7. Paper Support
Paper Type Paper Size
Thickness
(mm)
Legal 215.9 x 355.6 mm (8.5”x14”)
Letter 215.9 x 279.4 mm (8.5”x11”) Y - Y - Y -
A4 210 x 297 mm (8.3”x11.7”) Y - Y - Y -
B5 182 x 257 mm (7.2”x10.1”) - - Y - Y -
Plain paper
A5 148 x 210 mm (5.8”x8.3”) - - Y - Y -
0.08-0.11
Half Letter 139.7 x 215.9 mm (5.5"x8.5”) Y - - - - -
A6 148 x 210 mm (5.8”x8.35”) Y - Y - Y -
User Defined
50.8-329 x 127-1117.6 mm
(2-12.6” x 5-44”)
Premium Inkjet Plain Paper A4 210 x 297 mm (8.3”x11.7”) 0.11
Premium Bright White Paper (EAI)
Bright White Inkjet Paper (Euro, Asia)
Letter 215.9 x 279.4 mm (8.5”x11”) 0.11
A4 210 x 297 mm (8.3”x11.7”) 0.13
Letter 215.9 x 279.4 mm (8.5”x11”)
A4 210 x 297 mm (8.3”x11.7”) Y Y Y Y Y Y
Ultra Premium Glossy Photo Paper (EAI)
Ultra Glossy Photo Paper (Euro, Asia)
8” x 10” 203.2 x 254 mm Y Y Y - Y -
5” x 7” 127 x 178 mm Y Y Y Y Y Y
0.30
4” x 6” 101.6 x 152.4 mm Y Y Y Y Y Y
3.5” x 5” 89 x 127 mm Y Y Y Y Y Y
Letter 215.9 x 279.4 mm (8.5”x11”)
A4 210 x 297 mm (8.3”x11.7”) Y Y Y Y Y Y
8” x 10” 203.2 x 254 mm Y Y Y - Y -
Premium Photo Paper Glossy (EAI)
Premium Glossy Photo Paper (Euro, Asia)
5” x 7” 127 x 178 mm Y Y Y Y Y Y
4" x 6
"
101.6 x 152.4 mm Y Y Y Y Y Y
0.27
16:9 wide 102 x 181 mm Y Y Y Y Y Y
3.5” x 5” 89 x 127 mm Y Y Y Y Y Y
Weight
64-90 g/m
(17-24 lb.)
80 g/m
(21 lb.)
90 g/m
(24 lb.)
92.5 g/m
(25 lb.)
290 g/m
(77 lb.)
255 g/m
(68 lb.)
2
2
2
2
2
2
EAI EUR Asia
*1
P
*1
B
*1
P
*1
B
*1
P
Y - Y - Y -
Y - Y - Y -
- - Y - Y -
Y - - - - -
- - Y - Y -
Y Y Y - Y -
Y Y Y - Y -
*1
B
PRODUCT DESCRIPTION Specifications 12
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Table 1-7. Paper Support
Paper Type Paper Size
Letter 215.9 x 279.4 mm (8.5”x11”)
Photo Paper Glossy (EAI)
Glossy Photo Paper (Euro, Asia)
A4 210 x 297 mm (8.3”x11.7”) Y Y Y Y Y Y
5” x 7” 127 x 178 mm - - Y Y Y Y
4” x 6” 101.6 x 152.4 mm Y Y Y Y Y Y
Letter 215.9 x 279.4 mm (8.5”x11”)
Premium Photo Paper Semi-Gloss (EAI)
Premium Semigloss Photo Paper (Euro, Asia)
A4 210 x 297 mm (8.3”x11.7”) Y Y Y Y Y Y
4” x 6” 101.6 x 152.4 mm Y Y Y Y Y Y
Premium Presentation Paper Matte (EAI)
Matte Paper-Heavyweight (Euro, Asia)
Envelopes
*1
*1
Letter
A4
8” x 10
#10
#DL
#C6
215.9 x 279.4 mm (8.5”x11”)
210 x 297 mm (8.3”x11.7”) Y Y Y Y Y Y
” 203.2 x 254 mm - - - - - -
104.8 x 241.3 mm (4.125”x9.5”)
110 x 220 mm - - Y - Y -
114 x 162 mm - - Y - Y -
Note 1: “Y” in the “P” column stands for “the paper type/size is Supported”.
“Y” in the “B” column stands for “Borderless printing is available”.
Thickness
(mm)
0.25
0.27
0.23
-
Weight
258 g/m
(68 lb.)
250 g/m
(66 lb.)
167 g/m
(44 lb.)
45-75 g/m
(12-20 lb.)
2
2
2
2
EAI EUR Asia
*1
P
*1
B
*1
P
*1
B
*1
P
Y Y Y - Y -
Y Y Y - Y -
Y Y Y - Y -
Y - Y - Y -
*1
B
C A U T I O N
Make sure that the paper is not wrinkled, fluffed, torn, or folded.
The curve of paper must be 5 mm or below.
When printing onto an envelope, be sure that the flap is on the
long edge and is folded.
Do not use the adhesive envelopes.
Do not use double envelopes and cellophane window envelopes.
PRODUCT DESCRIPTION Specifications 13
Page 14
EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
PRINTING AREA
The printing area for this printer is shown below.
Table 1-8. Printing Area (Margins)
Print mode Paper size
Standard print
Any size 3 mm 3 mm 3 mm 3 mm
Left Right Top Bottom
Envelope 5 mm 5 mm 3 mm 20 mm
A4/Letter to
Borderless
print
2L/5” x 7”
2.54 mm* 2.54 mm*
4” x 6”/L 2.82 mm* 3.60 mm*
Note * : The margins for Borderless print are margins that bleed off the edges of paper.
Left margin
Right margin
Top margin
Left margin
Margin
2.96 mm* 4.02 mm*
Right margin
Top margin
Left margin
Printing area
Paper Feed Direction
Right margin
Figure 1-3. Printing Area on Envelopes
Top margin
Bottom margin
Printing area
Paper size
Paper Feed Direction
Bottom margin
Standard Print
Printing area
Bottom margin
Borderless Print
Figure 1-2. Printing Area on Cut Sheet
PRODUCT DESCRIPTION Specifications 14
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2.2 Scanning Specifications
Table 1-9. Scanner Specifications
Product type Flatbed color image scanner
Scanning method Scanning of fixed document with mobile scan head
Sensor CIS
Maximum scan area 8.5” x 11.7” (216 mm x 297 mm)
Document size A4 or US letter
Maximum effective pixels 5,100 x 14,040 pixels (600 dpi)
Resolution
Scanning resolution 50 to 4800 dpi (selectable in 1-dpi steps), 7200 dpi, 9600 dpi
Gradations (pixel depth)
Scanning speed
Light source RGB Three Color LED
Control commands ESC/I D7
Gamma correction Two user-defined levels
Main scan: 600 dpi
Sub scan: 1200 dpi with Micro Step
Each color pixel has 16-bit input and either 1-bit or 8-bit
output
600 dpi
Color: Approx. 15 msec/line
Monochrome: Approx. 5 msec/line
SCANNING AREA
Table 1-10. Image Scanning Area
RW
(readable width)
216 mm (8.5”) 1.5 mm ± 1 mm 297 mm (11.7”) 1.5 mm ± 1 mm
Scan area
Scan bed
Original
(face down)
(out-of-range left margin)
OLM
RL
(readable length)
RL OTM
a
Scan direction
First pixel
(out-of-range top margin)
RW
OLM
Original's top left
alignment position
OTM
Figure 1-4. Image Scanning Area
PRODUCT DESCRIPTION Specifications 15
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2.3 Standalone Copying Specifications
SUPPORTED PAPER TYPES AND SIZES
Table 1-11. Supported Paper Types and Sizes
Paper Type
UI Available Paper Type
Plain Paper
Plain Paper
Photo Paper
Note* : EAI models: Letter size.
Euro/Asia models: A4 size.
Latin models: Selectable between Letter and A4.
(Turning On the printer while holding down B&W Copy Start button selects Letter size,
and turning On the printer while holding down Color Copy Start button selects A4 size.)
Bright White Inkjet Paper
Premium
Premium Ink Jet Plain Paper (Euro/Asia)
Glossy Photo Paper (Euro, Asia)
Photo Paper Glossy (EAI)
Premium Glossy Photo Paper (Euro/Asia)
Premium Photo Paper Glossy
Premium Semigloss Photo Paper (Euro/Asia)
Premium Photo Paper Semi-Gloss (EAI)
Ultra Glossy Photo Paper (
Ultra Premium Glossy Photo Paper (EAI)
Bright White Paper (EAI)
(Euro/Asia)
(EAI)
Euro/Asia
)
Paper size
A4, Letter*
4” x 6”
(10 x 15 cm)
COPY MODE
Table 1-12. Print Mode for Copying
Copy Mode Print Mode
Mode Name Paper Type Mode Name Resolution Microweave Dot Size
Color copy* Plain Paper
B&W copy* Plain Paper
Photo copy Photo Paper Best Photo 1440 x 720 dpi ON VSD3
Note* : Print mode for the Color copy and B&W copy is selectable as described below:
Fast Economy: Press Color Text (or B&W Text for B&W copy) button and Stop button
simultaneously.
Normal: Press Color Text (or B&W Text for B&W copy) button.
Table 1-13. Copy Mode (Enlarging/Reducing)
Copy
Button
B&W Text
Color Text
Color Photo Borderless Fit to page 0 mm Enlarges or reduces to 4" x 6"/L size
Note* : “Fit to page” automatically sets the enlarge/reduce scale. When an original is smaller
than general card size (approx. 54mm x 86mm), the margins will be different from those
shown in the table.
Copy
Mode
Standard 100% 3 mm Copies A4/Letter original to the same size
Standard Fit to page 3 mm Enlarges or reduces to A4/Letter
Fast Economy 360 x 120 dpi OFF Eco
Normal 360 x 360 dpi ON VSD1
Fast Economy 360 x 120 dpi OFF Eco
Normal 360 x 360 dpi ON VSD1
Enlarge/
Reduce
Margins Description
COPY SPEED
Table 1-14. Copy Speed
UI Paper Type Print Mode Black Color
Plain Paper (A4/Letter)
Photo Paper (
Note *1: When printing “e-memo Pattern” on Plain Paper.
4” x 6”
)
*2: Borderless printing
Fast Economy 5 sec.*
Normal 20 sec.*
Best Photo - 380 sec.*
1
1
14 sec.*
72 sec.*
1
1
2
PRODUCT DESCRIPTION Specifications 16
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
COPY AREA
The following table shows the relative positioning of the original and copy.
Table 1-15. Original (scanner)
RW
(readable width)
216 mm (8.5”) 3 mm 297 mm (11.7”) 3 mm
RM LM TM BM
3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”)
Scan bed
Scan area
Original
(face down)
Copy paper
Print area
(out-of-range left margin)
OLM
Table 1-16. Copy (printer)
RL
Right side of original
RL
(readable length)
a
Print direction
Scan direction
Start point
a
(out-of-range top margin)
OTM
RW
OLM
LM
Top left corner
of the original
PW
OTM
BORDERLESS COPY
The following table shows the relative positioning of the original and copy.
Table 1-17. Original (scanner)
RW
(readable width)
216 mm (8.5”) 1.5 mm ± 1 mm 297 mm (11.7”) 1.5 mm ± 1 mm
RO LO TO BO
2.5 mm 2.5 mm 2.8 mm 3.6 mm
(out-of-range left margin)
RW
OLM
PW
OLM
Table 1-18. Copy (printer)
Right side of original
a
Print direction
Scan direction
LO
a
RL
(readable length)
RL
OTM
(out-of-range top margin)
OTM
Scan bed
Scan area
Original
(face down)
Start point
Top left corner
of the original
Print area
Copy paper
Copy
Right side of copy
RM
BM
PL
Figure 1-5. Standard Copy
PRODUCT DESCRIPTION Specifications 17
TM
RO
Figure 1-6. Borderless Copy
Right side of copy
BO
TO
PL
Copy
Page 18
EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2.4 Electrical Specifications
Primary power input
Table 1-19. Primary Power Input
Item 100-120 V model 220-240 V model
Rated power supply voltage 100 to 120 VAC 220 to 240 VAC
Input voltage range 90 to 132 VAC 198 to 264 VAC
Rated current 0.6A (max. 0.7) 0.3A (max. 0.4)
Rated frequency 50 to 60 Hz
Input frequency range 49.5 to 60.5 Hz
Dielectric strength 1500 ACVrms for one minute
Energy conservation International Energy Star Program compliant
Printing
(black text on plain paper)
Printing
(color draft on plain paper)
Power
consumption
Copying (normal BK mode) 15.3 W 15.6 W
Copying (draft BK mode) 21.6 W 22.0 W
Scanning 10.5 - 13.6 W 10.5 - 14.1 W
Sleep mode 3.8 W 3.8 W
Standby mode (power-off) 1 W 1 W
Note 1: If the printer is not operated for more than five minutes (T.B.D.), the standby function
reduces the current to the motor to conserve power.
2: If the scanner is not operated for more than five minutes (T.B.D.), the standby function
reduces the current to the motor to conserve power.
3: If the control panel is not operated for more than thirteen minutes (T.B.D.), the control
panel turns to the power save mode within fifteen minutes (T.B.D.).
13.3 W 13.8 W
17.9 W 17.7 W
1.2.5 Environmental Conditions
Table 1-20. Environmental Performance
Condition Temperature Humidity
Operating
Transporting*
10 to 35°C
(50 to 95°F)
-20 to 60°C*
1
(-4°F to 140°F)
20 to 80%*
3
5 to 85%
Note *1: Packed in the original package
*2: No condensation
*3: 120 hours at 60°C, One month at 40°C
Note : The combined Temperature and Humidity conditions must be within the blue-shaded
range shown below.
90
80
70
60
Humidity (%)
50
40
30
20
10/50
Figure 1-7. Temperature/Humidity Range
*2
3
Shock Vibration
1G
(1 msec or less)
2G
(2 msec or less)
27/80
30/86 35/95 40/10420/68
Temperature (°C/°F)
0.15G
(X,Y,Z directions)
1.5G
(X,Y,Z directions)
PRODUCT DESCRIPTION Specifications 18
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2.6 Durability
Total print life: 10,000 pages (black only, A4), or three years
(whichever comes first)
Printhead life: Seven billion shots (per nozzle) or five years
(whichever comes first)
Scanner head: 36,000 cycles (MCBF)
1.2.7 Acoustic Noise
Maximum 47 dB
(printing ECMA pattern on Premium Glossy Photo Paper in Best Photo mode)
1.2.8 Safety approvals (Safety standards/EMI)
USA UL60950-1
FCC Part15 Subpart B Class B
Canada CAN/CSA-C22.2 No.60950-1
CAN/CSA-CEI/IEC CISPR 22 Class B
Mexico NOM-019-SCFI-1998
Taiwan CNS13438 Class B
CNS14336
EU EN60950-1
EN55022 Class B
EN61000-3-2, EN61000-3-3
EN55024
Germany EN60950-1
Russia GOST-R (IEC60950-1, CISPR 22)
Singapore IEC60950-1
Korea K60950-1
KN22 Class B
KN61000-4-2/-3/-4/-5/-6/-11
Hong Kong IEC60950-1
Argentina IEC60950-1
Australia AS/NZS CISPR22 Class B
1.2.9 Interface
The printer has a USB interface of the following specification.
Standards
“Universal Serial Bus Specifications Revision 2.0”
“Universal Serial Bus Device Class Definition for Printing Devices Version
1.1” (printer unit)
Transfer rate: 12 Mbps (Full Speed Device)
Data format: NRZI
Compatible connector: USB Series B
Recommended cable length: 2 [m] or less
Device ID
Table 1-21. Device ID (T.B.D)
Product
Name
CX4300
CX4400
CX5500
Device ID
[00H][60H]
MFG:EPSON;
CMD:ESCPL2,BDC,D4,ESCPR1;
MDL:Stylus[SP]CX4300;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]CX4300;
[00H][60H]
MFG:EPSON;
CMD:ESCPL2,BDC,D4,ESCPR1;
MDL:Stylus[SP]CX4400;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]CX4400;
[00H][60H]
MFG:EPSON;
CMD:ESCPL2,BDC,D4,ESCPR1;
MDL:Stylus[SP]CX5500;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]CX5500;
Product
Name
CX5600
DX4400
DX4450
Device ID
[00H][60H]
MFG:EPSON;
CMD:ESCPL2,BDC,D4,ESCPR1;
MDL:Stylus[SP]CX5600;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]CX5600;
[00H][60H]
MFG:EPSON;
CMD:ESCPL2,BDC,D4,ESCPR1;
MDL:Stylus[SP]DX4400;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]DX4400;
PRODUCT DESCRIPTION Specifications 19
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2.10 Control Panel
BUTTONS
The five buttons on the control panel functions as shown below.
Table 1-22. Buttons
Button Function
Power Turns the power on or off.
• Job cancel
Stop
Color Photo
B&W Text
Color Text
Note * : See “1.2.11 Button Functions in Stand-alone Copy ” (p.21) for more details.
• Head cleaning
• Ink Cartridge replacement
• Photo copy
• Recovery from an error state
• B&W copy (100% scale with 3 mm margins, or Fit to page)
• Recovery from an error state
• Color copy (100% scale with 3 mm margins, or Fit to page)
• Recovery from an error state
Power LED
Power Button
Ink LED
Paper LED
Stop Button
INDICATORS (LED)
Color Photo Button
The three LEDs on the control panel indicates printer status as shown below.
Table 1-23. Indicators (LEDs)
LED Function
Power LED
[Green] *
Ink LED
[Orange]
Paper LED
[Orange]
Note *1: All LEDs except for Power LED will be turned off while printing or scanning by a
1
computer.
*2: See “1.2.12 Errors and Panel Status” (p.21) for more details.
Flashes during power-on and power-off sequence.
Flashes during some operation (printing, scanning, copying or cleaning)
is in process. Lights at stand-by.
Flashes or lights to indicate an ink-related status or error.*
Flashes or lights to indicate a paper-related status or error.*
2
2
B&W Text Button
Color Text Button
Figure 1-8. Control Panel
Note : Figure 1-8 is the control panel of the model for US/ESP/EAL. The button names or other
indications printed on the panel differ depending on the destination.
PRODUCT DESCRIPTION Specifications 20
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2.11 Button Functions in Stand-alone Copy
The functions of the buttons in stand-alone copy mode are described in the table below.
Table 1-24. Buttons
Button Function
Power Turns the power on or off.
• Job cancel
Cancels a print or copy job, and ejects paper if paper has been fed inside.
• Head cleaning
Runs a head cleaning cycle when pressed for three seconds or longer. If
Stop
Color Photo
B&W Text
Color Text
B&W Text +
Stop
there is not enough ink for the cleaning, the cleaning is automatically
cancelled and the printer indicates Ink out error.
• Ink Cartridge replacement
Moves the carriage to the position for replacing an ink cartridge(s) when
pressed during Ink out error or No ink cartridge error.
Starts ink charging when pressed after replacing the ink cartridge(s).
• Photo copy
Makes a color copy on 4x6 or L-sized Photo Paper.
• Recovery from an error state
Executes the remaining job when pressed after the error cause is removed.
• B&W copy (100% scale with 3 mm margins)
Makes a B&W copy on A4 or Letter-sized Plain Paper.
• B&W copy (Fit to page)
When pressed for three seconds or longer, makes a B&W copy on A4 or
Letter-sized Plain Paper enlarging or reducing the original image to fit it to
the paper size.
• Recovery from an error state
Executes the remaining job when pressed after the error cause is removed.
• Color copy (100% scale with 3 mm margins)
Makes a color copy on A4 or Letter-sized Plain Paper.
• Color copy (Fit to page)
When pressed for three seconds or longer, makes a color copy on A4 or
Letter-sized Plain Paper enlarging or reducing the original image to fit it to
the paper size.
• Recovery from an error state
Executes the remaining job when pressed after the error cause is removed.
Makes a B&W copy on A4 or Letter-sized Plain Paper in Fast Economy print
mode. (100% scale with 3 mm margins)
Table 1-24. Buttons
Button Function
Color Text +
Stop
B&W Text +
Power
Color Text +
Power
Makes a color copy on A4 or Letter-sized Plain Paper in Fast Economy print
mode. (100% scale with 3 mm margins)
(Only for Latin models)
Selects Letter size for B&W and Color copy.
(Only for Latin models)
Selects A4 size for B&W and Color copy.
1.2.12 Errors and Panel Status
Table 1-25. Errors and Panel Status
Error LED status Cause Recovery
Turn the power Off. Remove
Fatal error
Maintenance
request
Paper jam
Paper out
Ink out
No Ink
Cartridge
Incorrect Ink
Cartridge
Note * : When two or more errors occur at the same time, the one with higher priority will be
All LEDs
flash
All LEDs
lights
Paper LED
flashes
Paper LED
lights
Ink LED
lights
Ink LED
lights
Ink LED
lights
indicated.
Mechanical trouble
Some internal part
needs to be replaced
A paper jam has
occurred
Failed to load the paper.
Some cartridge has run
out of ink.
Some cartridge was not
detected.
An incorrect cartridge
was detected.
the cause and turn the power
back on. If the error still
occurs, call service.
Call service.
Remove the paper and press
B&W or Color Text button to
continue, or press Stop button
to cancel the job.
Load paper on the ASF
correctly, and press B&W or
Color Text button to continue,
or press Stop button to cancel
the job.
Replace the cartridge with
EPSON genuine one.
Replace the cartridge with
EPSON genuine one.
Replace the cartridge with
EPSON genuine one.
Priority
1
2
3
3
4
4
4
PRODUCT DESCRIPTION Specifications 21
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
1.2.13 Power Save Mode
Without any panel operation for 15 minutes (T.B.D.) while the printer and scanner unit
are in standby status, this unit moves into the low power panel mode in which power
consumption for the panel decreases.
This unit recovers from that mode by pushing any button but Power Button or printing/
scanning by the computer.
This unit is turned off by pushing Power Button in that mode.
Table 1-26. Power Save Mode
Action Function
Transition to
power save mode
Recovery from
power save mode
Turn off all the LEDs except for Power LED.
Recall the panel status as that before moving to low power panel mode.
1.2.14 Nozzle Check Pattern Print
Nozzle check pattern can be printed only with this unit. Left ink quantity of each color
is also printed in 10% increments.
To activate this function, turn on this unit while depressing Ink Button. After printing
the pattern, this unit moves to ordinary standby status.
The example of nozzle check pattern is explained below.
1
31
61
30
60
90
360dpi
VSD1
1
1
1
(1/120inch)
0.212mm
<Yellow><Black>
<Magenta>
<Cyan>
29
29
29
1.2.15 Printer Initialization (T.B.D)
There are four kinds of initialization method, and the following explains each
initialization.
1. Power-on initialization
This printer is initialized when turning the printer power on, or printer recognized
the cold-reset command (remote RS command).
When printer is initialized, the following actions are performed.
(a) Initializes printer mechanism
(b) Clears input data buffer
(c) Clears print buffer
(d) Sets default values
2. Operator initialization
This printer is initialized when turning the printer power on again within 10
seconds from last power off, or printer recognized the -INIT signal (negative
pulse) of parallel interface.
When printer is initialized, the following actions are performed.
(a) Cap the printer head
(b) Eject a paper
(c) Clears input data buffer
(d) Clears print buffer
(e) Sets default values
3. Software initialization
The ESC@ command also initialize the printer.
When printer is initialized, the following actions are performed.
(a) Clears print buffer
(b) Sets default values
4. Power-on initialization except I/F
The printer recognized the IEEE 1284.4 “rs” command.
When printer is initialized, the following action is performed.
(a) Initializes printer mechanism
(b) Clears input data buffer
(c) Clears print buffer
(d) Sets default values except I/F
8 dots
Figure 1-9. Nozzle check pattern
PRODUCT DESCRIPTION Specifications 22
Page 23
OPERATING PRINCIPLES
CHAPTER
2
Page 24
EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.1 Overview
This section describes the operating principles of the Printer Mechanism, Scanner
Mechanism and Electrical Circuit Boards.
PF motor
PF roller
2.2 Printer Mechanism
Printer mechanism of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450
consists of printhead, carriage mechanism, paper loading/feeding mechanism, and ink
system.
As in the case of conventional models, Stylus CX4300/CX4400/CX5500/CX5600/
DX4400/DX4450 has two motors; one is a stepping motor for paper loading/feeding
mechanism, and the other is a DC motor for carriage mechanism.
Papers are fed from the backside and ejected from the front side of the printer.
Paper feeding mechanism feeds papers using the LD roller and the retard roller.
Star wheel
rollers
Carriage unit
Paper eject
roller
CR lock lever
Cap unit
CR timing belt
CR encoder
sensor
Retard roller
Compression
spring
LD roller
PE sensor
Cam, large
Cam, small
Clutch
Pump unit
CR motor
Figure 2-1. Printer Mechanism Outline
OPERATING PRINCIPLES Overview 24
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.2.1 Printhead Specifications
The Printhead of this product is a D2-CHIPS type.
Nozzle configuration
Monochrome 90 nozzles
Color 29 nozzles x 3 (Cyan, Magenta, Yellow)
The following shows the arrangement of the nozzles and the color arrangement of each
nozzle line when viewed the printhead from behind.
2.822mm
(40/360 inch)
C#29
Cyan: 29nozzles
C#1
M#29
Magenta: 29nozzles
K#90
K#89
Paper Loading
Black
Color
Direction
2.2.2 Carriage Mechanism
Main components of the carriage mechanism are carriage unit (including printhead,
CR encoder sensor), CR motor, timing belt, and CR scale.
2.2.2.1 CR Motor Specifications
Table 2-1. CR Motor Specifications
Item Specification
Type Motor with DC brush
Drive voltage +42 V ± 5% (applied voltage to the driver)
Electric resistance 28.8 Ω ± 10%
Inductance 20.1 mH ± 25%
Drive method PWM, constant-current chopping
Drive IC A6628
M#1
Y#29
Yellow: 29nozzles
Y#3
Y#2
Y#1
Carriage Moving Direction
K#3
K#2
K#1
0.2117mm
(1/120 inch)
Figure 2-2. Nozzle Rear View
OPERATING PRINCIPLES Printer Mechanism 25
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.2.3 Paper Feeding Mechanism
Paper loading/feeding mechanism consist of CR lock lever inside the ink system, LD
roller shaft (including clutch mechanism), and ASF unit.
CR lock lever and clutch mechanism play an important role in paper loading
mechanism. Refer to 2.2.3.2 Drive Process (p26) for details.
2.2.3.1 PF Motor Specifications (For both ASF and Pump motor)
Table 2-2. PF Motor Specification
Item Specification
Type 4-phase, 48-pole PM stepping motor
Drive voltage +42 V ± 5% (applied voltage to the driver)
Wire wound
resistance
Inductance 5.5 mH ± 20% (1KH, 1Vrms)
Drive method
Drive IC A6628
2-2 phase, 1-2 phase, W1-2phase, 2W1-2phase, 4W1-2 phase
4.3 Ω +8 / -12% (per one phase at 20 °C)
Bipolar drive
constant-current drive
2.2.3.2 Drive Process
1. Drive of the PF motor is always transmitted to the paper eject roller and the PF
roller, however, it is not transmitted to the LD roller and the retard roller owing to
the clutch of the LD roller shaft.
2. The carriage unit moves to the ASF trigger position once the paper loading
command is received.
3. PF motor is rotated counter clockwise, and the clutch is released by the CR lock
lever.
4. After the clutch is released, the PF motor rotates clockwise. Drive is transmitted to
the LD roller and the paper loading operation begins.
5. During paper loading operation, papers are fed from the ASF unit to inside the
printer by the rotating movement of the two cams of the LD roller.
Cam, large:releases hopper
Cam, small:releases paper back lever
6. Once a sheet of paper is fed, the hopper and the paper back lever bring back rest of
the papers to the position in readiness by the rotating movement of the two cams
mentioned above.
7. When the LD roller is turned a full circle, the CR lock lever release the clutch and
the drive to the LD roller is interfered.
OPERATING PRINCIPLES Printer Mechanism 26
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.2.4 Ink System Mechanism
The Ink system mechanism consists of pump mechanism and capping mechanism that
includes wiper mechanism.
2.2.4.1 Pump Unit Mechanism
When the PF motor turns, power is always transmitted to the ink system.
Table 2-3. PF Motor Rotational Direction & Ink System Mechanism
Direction* Function
Counterclockwise Absorbs the ink by the Pump Unit
Clockwise Release pump.
Note * : The PF Motor rotational direction = seen from the left side of the printer.
2.2.4.2 Capping Mechanism
The Capping mechanism covers the printhead with the cap to prevent the nozzle from
increasing viscosity when the printer is in stand-by state or when the printer is off.
OPERATING PRINCIPLES Printer Mechanism 27
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.3 Scanner Mechanism
The Scanner Mechanism of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/
DX4450 are constructed of a Scanner Carriage Unit, Scanner Motor, etc., in the same
way as previous A4 size scanners.
2.3.1 Scanner Carriage Mechanism
2.3.1.1 Scanner Carriage Unit Overview
The Scanner Carriage Unit consists of a CIS Board, Rod Lens Array, LEDs, etc.
CIS Board
CIS Board contains the sensing elements that are placed across the entire width of
an original. The sensing elements, which does not install a color filter, read an
original through the Rod Lens Array by turning on red, green, and blue lightemitting diodes (LEDs) alternately. It is not the CIS Board but the Main Board that
converts the analog light signal read by the Rod Lens Array into digital signal.
Rod Lens Array
A number of rod-shaped lenses, which are arranged on the sensing elements, are
also placed across the entire width of an original. These lenses read the light
reflected from the original that is produced by the light source (LEDs) and pass the
information to the sensing elements. Compared to conventional CCD method, this
optical system allows the focal length (distance between sensor and image
scanned) to be shallow. Therefore, an original to be scanned should be brought
close to the document glass. The optical system, in addition, is 1:1, (there is no
optical reduction or enlargement) and this results in a scanner offering the solid
performance in terms of accuracy.
Scanner Carriage UnitScanner Carriage Shaft
Scanner Motor Timing Belt
Figure 2-3. Scanner Mechanism
LEDRod Lens Array
CIS
LED
Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 use three color
LEDs (the three colors being red, green, and blue) to illuminate the line to be
scanned in the document. Unlike cold cathode fluorescent lamp used in CCD
method, usage of LEDs requires no warm-up time and allows the CIS to be highly
power efficient.
Scanner Carriage Unit
Figure 2-4. Scanning image
CIS Board
OPERATING PRINCIPLES Scanner Mechanism 28
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.3.1.2 Scanner Carriage Unit Movement Overview
Image is scanned in the main scanning direction (=1 line) by the CIS board and in the
sub-scanning direction (=several lines) combined with Scanner Carriage Unit
movement. (See the figure below.)
The CIS board can scan 1 line in main scanning direction (parallel to the Scanner
Carriage Unit) at one time. When scanning next lines after the second line in subscanning direction, CR driving moves the Scanner Carriage Unit, and scan the lines.
The scanned data is sent to the control board. The scanned data for “n” lines and “n-1”
line are processed consecutively.
1st line 2nd line 1 pixel
Scanner Carriage
Unit
Sub-scanning direction by Scanner Carriage Unit movement
Figure 2-5. Scanner Carriage Unit movement
Document
Mainscanning
direction
Drive of the Scanner Motor is transferred to the Scanner Carriage Unit by the Scanner
Timing Belt. The Scanner Carriage Unit slides in the secondary scanning direction.
The Scanner Motor uses a stepping motor and drives using open loop control.
Left side
Scanner Motor
Right side
Scanner Carriage Unit
Figure 2-6. Scanner Carriage Unit Mechanism
The table below shows the specifications for the stepping motor that controls the
Scanner Carriage Mechanism.
Table 2-4. Scanner Motor specifications
Item Description
Motor type PM type stepping motor
Drive voltage 42V (DC)
Coil resistance 37Ω ±10% (per phase at 25 degrees)
Inductance TBDmH ± TBD%
Driving method PWM
Driver IC L6219
OPERATING PRINCIPLES Scanner Mechanism 29
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.4 Electrical Circuit Operating Principles
The electric circuit of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450
consists of the following boards:
Main board: PCBA MB
Power supply board: ASSY POWER 110V/220V
Panel board: PCBA PB
The figure below shows the block diagram of this printer.
Panel Board
CR Motor
PF Motor
Head Driver Board
Main Board
+42VDCPower Off
Power Supply Board
Sensors
Scanner Motor
CIS Assy.
Figure 2-7. Electrical Circuit Block Diagram
Printer
Mechanism
Scanner
Mechanism
2.4.1 Power Supply Board
In the Power Supply Board of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/
DX4450, the simulated oscillating stimulation flyback converter circuit method is
used, and it supplies +42 VDC to the drive line. The application of the output voltage is
described below.
AC voltage input from AC inlet first goes through filter circuit that removes high
frequency components and is then converted to DC voltage via the rectifier circuit and
the smoothing circuit. DC voltage is then led to the switching circuit and FET QF1
preforms the switching operation. By the switching operation of the primary circuit,
+42VDC is generated and stabilized at the secondary circuit.
2.4.2 Main Board
The logic circuit of the Main Board is composed of the following:
Logic line (CPU-ASIC 4 in 1, Flash-ROM and so on)
Motor control/drive circuit (CR Motor, PF Motor, Scanner Motor)
Head control/drive circuit
USB I/F circuit
Sensor circuit
Reset circuit, EEPROM circuit
Table 2-5. Main Board Major Components and Primary Functions
IC Location Function
CPU-ASIC U3
SDRAM U4 3.3 V drive 4M x 16 bit DRAM
Serial Flash U5 3.3 V drive 4 M bit Serial Flash that stores the program
Motor Driver
RTC U9
DAC U10 Generates trapezoidal waveform, drives 3.3 V
U6 Scanner motor drive; adjusts 5 V, drives 42 V
U7 CR/PF motor drive; adjusts 5 V, drives 42 V
Drives CPU (H8S/2674 base), internal 8 K byte x 4 RAM,
24 Mhz, 3.3 V/1.8V
•EEPROM
Default settings, backup for all parameters
• Reset function
• Timer function
OPERATING PRINCIPLES Electrical Circuit Operating Principles 30
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Serial Flash
(U5)
J7
CR Motor
CIS Assy.
Panel Board
RTC
(U9)
SDRAM
(U4)
J5
J3
USB
(J2)
Data
Address
CPU-ASIC (U3)
Motor
Driver
(U7)
Motor
Driver
(U6)
DAC
(U10)
Q12, Q13
J8
J6
J9
CN1
CN2
PF Motor
Scanner Motor
PE Sensor
Printhead
CR Encoder Sensor
Power Supply Board
J1
CSIC Board
Figure 2-8. Main Board Block Diagram
OPERATING PRINCIPLES Electrical Circuit Operating Principles 31
Page 32
TROUBLESHOOTING
CHAPTER
3
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
3.1 Overview
This chapter describes unit-level troubleshooting. Refer to the flowchart in this chapter
to identify the defective unit and perform component level repair if necessary. This
chapter also explains motor coil resistance, sensor specification and error indication.
START
Unit-level troubleshooting
Unit repair
Assemble & Adjustment
END
Figure 3-1. Troubleshooting flowchart
Table 3-1. Motor, coil resistance
Table 3-2. Sensor check point
Sensor name Check point Signal level Switch mode
PE Sensor J9 / Pin 1 and 2
Less than 0.4V Off : No paper
More than 2.4V On : Detect the paper
3.2 Error Indications and Fault Occurrence Causes
This section describes the LED indications, STM3 messages and fault occurrence
causes at occurrence of the following errors during any sequence/operation (e.g.
power-on sequence, paper feeding/loading sequence, ink sucking sequence).
NOTE: The STM3 windows shown in the table in the following pages are the
ones of Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450,
however, other models show almost the same displays as those except the
following items:
1) Printer model name
2) T-code for each ink cartridge (refer to
Table 1-3 (p.10) )
Motor Motor Type Location Check point Resistance
Scanner motor Stepping motor J6
PF motor
Note : The CR motor is DC motor. Since the resistance of the DC motor varies among the
electric poles, resistance value cannot be used to check the DC motor. When a
malfunction of the CR motor is suspected, check the motor if it moves normally or not.
However, it is difficult to judge accurately, if it is not clear, replace the motor.
4-phase, 48-pole,
PM Stepping motor
J8
Pin 1 and 3
Pin 2 and 4
Pin 1 and 3
Pin 2 and 4
37Ω ± 10% (T.B.D.)
4.3Ω+8/-12% (20°C)
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Table 3-3. Error Indications and Fault Occurrence Causes
Printer Status Communication Error Ink Low Double Feed Paper Out
Power — — — —
Ink — — — —
Indications
Paper — — — On
Status monitor 3
message
Fault
Occurrence
Cause
Reference Page
This error is detected when the SPC
cannot communicate with the PC
correctly.
Table 3-6, “Check point for
communication error according to each
phenomenon,” on page 37
This error is detected when the ink
consumption amount reaches about 90%.
Note :
Even if this error is indicated on the STM3, you
can continue printing until I/C becomes Replace
Ink Cartridge condition. However, the Head
Cleaning operation cannot be done so that the
remaining ink is low condition.
---
This error is detected at resending of paper
for double-sided printing when paper
length is determined to be other than
default value.
Table 3-8, “Check point for double feed
error according to each phenomenon,” on
page 39
This error is detected when the top of a
paper is not detected with the PE Sensor in
the paper loading sequence.
Table 3-9, “Check point for paper out
error according to each phenomenon,” on
page 40
Note : “–” : No change
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Table 3-4. Error Indications and Fault Occurrence Causes
Printer Status Replace Ink Cartridge or No Ink Cartridge CSIC Error Incorrect I/C Paper Jam
Power — — — —
Ink On On On —
Indications
Paper — — — On
Status monitor 3
message
Fault
Occurrence
Cause
Reference Page
This error is detected when;
• The ink consumption amount reaches
100%.
• The ink cartridge is defective.
Note :
The slight amount of the ink is remaining in the
I/C even if the Replace Ink Cartridge error is
detected. This is to prevent the Print Head
nozzle from the printing operation without
firing the ink.
Table 3-10, “Check point for no ink
cartridge/CSIC error/incorrect ink
cartridge according to each
phenomenon,” on page 43
This error is detected when data from
CSIC cannot be read normally or when
data cannot be written to CSIC.
Table 3-10, “Check point for no ink
cartridge/CSIC error/incorrect ink
cartridge according to each
phenomenon,” on page 43
This error is detected when;
• An unsupported ink cartridge has been
installed.
• An ink cartridge with a different
destination has been installed.
Table 3-10, “Check point for no ink
cartridge/CSIC error/incorrect ink
cartridge according to each
phenomenon,” on page 43
This error is detected when the PE Sensor
cannot properly detect the paper bottom
edge during feeding of paper.
Table 3-11, “Check point for paper jam
error according to each phenomenon,” on
page 44
Note : “–” : No change
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Table 3-5. Error Indications and Fault Occurrence Causes
Printer Status Maintenance Request Fatal Error (Mechanism)
Power On Blink
Ink On Blink
Indications
Paper On Blink
Status monitor 3
message
Fault
Occurrence
Cause
Reference Page
This error is detected when the Waste Ink
Counter exceeds the preset counter value.
“5.2.3 Waste Ink Pad Counter” (p.XXX)
(T.B.D.).
This error is detected when it is
determined that the printer cannot operate
properly. (CR error, PF error, etc.)
Table 3-12, “Check point for fatal error
according to each phenomenon,” on
page 47
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3.3 Troubleshooting
You can identify the troubles by using the checklist in this section after confirming the LED indication on the SPC. If you connect the SPC to your PC and see an error message on
the STM3, you can short the total repair time. And, when you find out the defective parts, replace them by referring the Chapter 4 “DISASSEMBLY AND ASSEMBLY”. The
following tables describe the error check points.
Table 3-6. Check point for communication error according to each phenomenon
Occurrence
timing
CR position
• Power on
•Anywhere
Detailed phenomenon
When turning on the power, the SPC
does not operate at all.
Defective
unit/part name
Panel Unit
Check point Remedy
1. Check if the Panel Board is not damaged. 1. Replace the Panel Board with new one.
1. Check if the PS Board Connector Cable is connected to
the J1 on the Main Board.
1. Connect the PS Board Connector Cable to J1
on the Main Board.
• Power on
•Anywhere
When turning on the power, the SPC
does not operate at all.
Main Board
PS Board Unit
2. Check if the PS Board Connector Cable/PS Board is not
damaged.
PS Board Connector Cable
PS Board Unit
J1
2. Replace the PS Board Unit with new one.
* If the problem is not solved, replace the
Main Board with new one.
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Table 3-6. Check point for communication error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Operation
•–
Occurrence
timing
CR position
• Power on
•Inside HP
• Power on
•Anywhere
When turning on the power, the
power on sequence is performed
correctly. But, when any printer job
is sent to the SPC, a communication
error is indicated with STM3.
Table 3-7. Check point for error before the initial ink charge according to each phenomenon
Detailed phenomenon
The SPC does not perform the initial ink
charge and an error is indicated with
LEDs and STM3.
The SPC does not perform the ink
replacement CL and an error is indicated
with LEDs and STM3.
The SPC does not perform the printing
operation and an error is indicated with
LEDs and STM3.
USB Cable
Main Board Unit
Defective
unit/part name
Ink Cartridge
Main Board
Ink Cartridge
Ink Cartridge
1. Check if the USB Cable is connected between the SPC
and the PC.
1. Check if an incorrect model name is not stored into the
address of the EEPROM on the Main Board.
2. Check if the Panel FFC is connected to the J3 on the
Main Board.
Main Board
Check point Remedy
1. Check if the Ink Cartridge can be used by installing it to
other SPC.
1. Check if an incorrect data is not stored into the address of
the EEPROM on the Main Board.
1. Check if the Ink Cartridge can be used by installing it to
other SPC.
1. Check if the ink is remaining in the Ink Cartridge. 1. Replace the Ink Cartridge with a brand-new
2. Check if the Ink Cartridge can be used by installing it to
other SPC.
Panel FFC
J3
1. Connect the USB Cable to the SPC and the
PC.
1. Use the Adjustment Program to write the
correct value to the EEPROM address.
2. Connect the Panel FFC to the J3 on the Main
Board.
1. Replace the Ink Cartridge with a brand-new
one.
1. Set the proper destination by using
Adjustment Program.
1. Replace the Ink Cartridge with a brand-new
one.
one.
2. Replace the Ink Cartridge with a brand-new
one.
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Table 3-8. Check point for double feed error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
1. Check if the Extension Spring Retard operates correctly
in the paper loading sequence.
Back side of ASF Unit
1. Set the Extension Spring Retard between the
Retard Roller Unit and the ASF Frame.
• Operation
•–
After both surfaces were printed, the
paper was ejected but an error is
displayed.
ASF Unit
Extension Spring Retard
2. Check if the Paper Back Lever operates correctly in the
paper loading sequence.
Back side of ASF Unit
Paper Back Lever
Torsion Spring 6.45
2. Set the Torsion Spring 6.45 between the ASF
Frame and the Paper Back Lever.
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Table 3-9. Check point for paper out error according to each phenomenon
Occurrence
timing
CR position
• Operation
•–
Detailed phenomenon
The LD Roller cannot pick up paper
although the LD Roller attempt to rotate
correctly.
Defective
unit/part name
LD Roller
Check point Remedy
1. Check if any paper dust is not adhered to the surface of
the LD Roller.
LD Roller
1. Check if the Hopper operates correctly in the paper
loading sequence.
1. Set a cleaning sheet in the ASF Unit up side
down. Then holding the top edge, try to load
the paper from the Printer driver. The micro
pearl on the LD Roller surface is removed. To
remove severe smear, staple a cloth
moistened with alcohol to a post card and
clean the roller in the same manner.
Non-adhesive Area
CL Sheet
Adhesive Area
This side down
(Use a post card for
the base sheet)
Staplers
Cloth moistened
with alcohol
*If the problem is not solved, replace the
LD Roller with new one.
1. Reassemble the Compression Spring 2.51
between the ASF Frame and the Hopper.
Hopper
The Hopper does not operate during the
• Operation
•–
paper loading sequence although the LD
Roller rotates to load paper from the
Hopper
ASF Unit.
Compression Spring
2.51
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Table 3-9. Check point for paper out error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Operation
•–
The drive of the PF Motor is not
transmitted to the LD Roller Shaft.
ASF Unit
1. Check if the Extension Spring 0.143 does not come off in
the Clutch mechanism.
Extension Spring 0.143
Clutch
2. Check if the positioning hole of the Clutch does not come
off from the guide pin of the LD Roller Shaft.
Guide pin
Positioning hole
Clutch
LD Roller Shaft
1. Reassemble the Extension Spring 0.143 in the
Clutch mechanism.
2. Reassemble the positioning hole of the Clutch
on the guide pin of the LD Roller Shaft.
3. Check if the Clutch tooth is not damaged. 3. Replace the ASF Unit with a new one.
4. Check if the Clutch is not damaged. 4. Replace the ASF Unit with a new one.
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Table 3-9. Check point for paper out error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Operation
•–
• Operation
•–
The drive of the PF Motor is not
transmitted to the LD Roller Shaft.
The LD Roller is not set to the ASF
home position and paper is always
loaded from the ASF Unit during the
paper loading sequence.
ASF Unit
ASF Unit
1. Check if the Compression Spring 2.36 does not come off
in the Change Lever.
Change Lever
Compression Spring 2.36
1. Check if the tip of the Change Lever is not damaged. 1. Replace the ASF Unit with a new one.
1. Replace the ASF Unit with a new one.
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Table 3-10. Check point for no ink cartridge/CSIC error/incorrect ink cartridge according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Ink Cartridge
Check point Remedy
1. Check if Ink Cartridge is properly installed. 1. Install the Ink Cartridge properly.
2. Check if the Memory Chip is not disconnected or not chipped. 2. Replace the Ink Cartridge with a new one.
Memory Chip
1. Check if the Head FFC is connected to connector on the CSIC
Board.
Head FFC
1. Connect the Head FFC to connector on the
CSIC Board.
• Power on
•Inside HP
After the Carriage has detected the HP,
an error is displayed.
CSIC Board
Connector
2. Check if the CSIC Board is not damaged. 2. Replace the Carriage Unit with a new one.
1. Check if the CSIC Connector is not damaged. 1. Replace the Carriage Unit with a new one.
CSIC Board
CSIC Connector
CSIC Connectors
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Table 3-11. Check point for paper jam error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
1. Check if the ASF Unit is properly installed. 1. Install the ASF Unit properly.
2. Check if the Paper Back Lever operates correctly in the
paper loading sequence.
2. Set the Torsion Spring 6.45 between the ASF
Frame and the Paper Back Lever.
• Operation
•Outside HP
The paper feeding sequence is
performed without loading paper in the
paper loading sequence.
ASF Unit
Paper Guide Upper
Unit
Back side of ASF Unit
Paper Back Lever
Torsion Spring 6.45
1. Check if the Torsion Spring 0.22 is properly installed. 1. Set the Torsion Spring 0.22 between the
Holder Shaft and the PE Sensor Lever.
Torsion
Spring 0.22
PE Sensor Lever
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Table 3-11. Check point for paper jam error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
1. Check if the Extension Spring Retard operates correctly
in the paper loading sequence.
Back side of ASF Unit
Paper is being resent during paper
feeding operation.
• Operation
•Outside HP
When turning on the power, the Carriage
Unit move to the home position
correctly. But, the paper feeding
sequence is performed without loading
paper in the paper loading sequence.
• Operation
•–
* The Carriage Unit can move to home position even if the Torsion Spring 0.22 comes off. However, the PE Sensor Lever keeps the high signal condition in the next operation. Therefore, the paper
jam error is detected.
** In case that the paper jam error occurs in each operation, the jammed paper contacts the nozzle surface of the Print Head and the Print Head may be damaged.
The leading edge of paper does not go
through between the EJ Roller Unit and
the Star Wheel.
ASF Unit
Extension Spring Retard
1. Check if the Torsion Spring 0.22 is properly installed. 1. Set the Torsion Spring 0.22 between the
Paper Guide Upper
Unit*
1. Check if the EJ Frame Assy is correctly assembled. 1. Reassemble the EJ Frame Assy correctly.
EJ Frame Assy
EJ Frame Assy**
1. Set the Extension Spring Retard between the
Retard Roller Unit and the ASF Frame.
Holder Shaft and the PE Sensor Lever.
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Table 3-11. Check point for paper jam error according to each phenomenon
Occurrence
timing
CR position
• Operation
•–
Detailed phenomenon
The leading edge of paper does not go
through between the EJ Roller Unit and
the Star Wheel.
The leading edge of paper is not loaded
to the PF Roller Unit.
Defective
unit/part name
EJ Frame Assy*
Paper Guide Upper
Unit *
Check point Remedy
2. Check if the Star Wheel Holders does not come off. 2. Reassemble the Star Wheel Holders
correctly.
Star Wheel Holders
3. Check if the Spur Gear 36 is not damaged. 3. Replace the EJ Frame Assy with a new one.
1. Check if the Paper Guide Upper Unit is correctly
assembled.
Paper Guide Upper Unit
1. Reassemble the Paper Guide Upper Unit to
the Main Frame correctly.
* In case that the paper jam error occurs in each operation, the jammed paper contacts the nozzle surface of the Print Head and the Print Head may be damaged.
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Table 3-12. Check point for fatal error according to each phenomenon
Occurrence
timing
CR position
• Power on
•Anywhere
Detailed phenomenon
The Scanner Unit does not initialize
when the power is turned on.
Defective
unit/part name
Scanner Motor
Check point Remedy
1. Check if the Scanner Motor Connector Cable is
connected to J6 on the Main Board.
J6
Scanner Motor
Connector Cable
2. Check if the coil resistance of the Scanner Motor is about
37Ω (T.B.D.) by using the tester (refer to Table 3-1).
1. Connect the Scanner Motor Connector Cable
to J6 on the Main Board.
2. Replace the Scanner Motor with a new one.
Scanner Motor
3. Check if the Scanner Motor Connector Cable is not
damaged.
3. Replace the Scanner Motor with a new one.
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Table 3-12. Check point for fatal error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Power on
•Anywhere
• Power on
•Anywhere
The Scanner Unit does not initialize
when the power is turned on.
The Scanner Unit does not initialize
when the power is turned on.
Scanner FFC
CIS Assy.
1. Check if the Scanner FFC is connected to J5 on the Main
Board.
J5
Scanner FFC
2. Check if the Scanner FFC is not damaged. 2. Replace the Scanner FFC with a new one.
1. Check if the CIS Assy. is not damaged. 1. Replace the CIS Assy. with a new one.
CIS Assy.
1. Connect the Scanner FFC to J5 on the Main
Board.
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Table 3-12. Check point for fatal error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Power on
•Anywhere
When turning on the power, the CR
Motor does not operate at all.
When turning on the power, the PF
Motor does not operate at all.
CR Motor
PF Motor
1. Check if the CR Motor Connector Cable is connected to
J7 on the Main Board.
CR Motor
CR Motor
Connector Cable
J7
1. Connect the CR Motor Connector Cable to J7
on the Main Board.
2. Check if the CR Motor Connector Cable is not damaged. 2. Replace the CR Motor with a new one.
3. Check if the CR Motor operates. 3. Replace the CR Motor with a new one.
1. Check if the PF Motor Connector Cable is connected to
J8 on the Main Board.
PF Motor
J8
Connector Cable
1. Connect the PF Motor Connector Cable to J8
on the Main Board.
2. Check if the coil resistance of the PF Motor is about 4.3Ω
2. Replace the PF Motor with a new one.
by using the tester (refer to Table 3-1)
3. Check if the PF Motor Connector Cable is not damaged. 3. Replace the PF Motor with a new one.
4. Check if the PF Motor operates. 4. Replace the PF Motor with a new one.
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Table 3-12. Check point for fatal error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Power on
•Anywhere
• Power on
•Anywhere
When turning on the power, the Carriage
Unit collides to the Change Lever
located to the front side of the printer.
The Carriage Unit collides with the
Guide Upper Unit when power is turned
on.
PF Motor
ASF Unit
Paper Guide
Upper Unit
1. Check if the PF Motor Connector Cable is connected to
J8 on the Main Board.
2. Check if the coil resistance of the PF Motor is about 4.3Ω
by using the tester (refer to Table 3-1)
3. Check if the PF Motor Connector Cable is not damaged. 3. Replace the PF Motor with a new one.
4. Check if the PF Motor operates. 4. Replace the PF Motor with a new one.
1. Check if the Compression Spring 2.36 does not come off
in the Change Lever.
Change Lever
Compression Spring 2.36
1. Check if the Paper Guide Upper Unit is correctly
assembled.
Paper Guide Upper Unit
1. Connect the PF Motor Connector Cable to J8
on the Main Board.
2. Replace the PF Motor with a new one.
1. Replace the ASF Unit with a new one.
1. Reassemble the Paper Guide Upper Unit to
the Main Frame correctly.
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Table 3-12. Check point for fatal error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Power on
•Anywhere
When turning on the power, the Carriage
Unit collides to the right side of the
Main Frame.
CR Scale
1. Check if the CR Scale does not come off or it properly
passes through the slit of the CR Encoder Board.
Slit of the CR
Encoder Board
2. Check if the CR Scale is not damaged or contaminated. 2. Replace the CR Scale with a new one or clean
CR Scale
1. Check if the Encoder FFC is connected to the CR
Encoder Board.
Encoder FFCCR Encoder Board
1. Reassemble the CR Scale correctly.
* If the problem is not solved, replace the
Main Board with a new one.
it completely.
1. Connect the Encoder FFC to the CR Encoder
Board.
CR Encoder Board
2. Check if the Encoder FFC is not damaged. 2. Replace the Encoder FFC with a new one.
3. Check if the CR Encoder Board is not damaged. 3. Replace the CR Encoder Board with a new
one.
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Table 3-12. Check point for fatal error according to each phenomenon
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Operation
•Anywhere
• Operation
•Anywhere
• Operation
•Anywhere
The CIS Assy. does not operate.
The paper feeding sequence is
performed without loading a paper in the
paper loading sequence.
The Carriage Unit climbs over the Slider
Lock Lever set to the wiping position
and the Carriage Unit collides to its
lever.
Lower Scanner
Housing
PE Detector Assy.
Cap Assy.
(Ink System)
1. Check if the grease is enough on the Guide Rail of the
Lower Scanner Housing.
1. Check if the PE Sensor Connector Cable is connected to
J9 on the Main Board.
PE Sensor Connector Cable
J9
2. Check if the PE Sensor Connector Cable is not damaged. 2. Replace the PE Sensor with a new one.
3. Check if the PE Sensor is not damaged. 3. Replace the PE Sensor with a new one.
1. Check if the Cap Assy is installed correctly. 1. Install the Cap Assy correctly.
Cap Assy
Slider Lock Lever
1. After wiping the grease on the Guide Rail of
the Lower Scanner Housing with a dry, soft
cloth, coat it with grease. (Refer to Chapter 6
“MAINTENANCE” (p.116).)
1. Connect the PE Sensor Connector Cable to J9
on the Main Board.
2. Check if the Cap Assy (Ink System) is not damaged. 2. Replace the Ink System with a new one.
Base Frame
1. Check if the Base Frame is deformed. 3. Replace the Printer Mechanism with a new
one.
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
3.3.1 Superficial Phenomenon-Based Troubleshooting
This section explains the fault locations of the error states (print quality and abnormal noise) other than the error states (LED and STM3) in the previous section.
Table 3-13. Check point for multiple sheets of paper are always loaded without LEDs and STM3
Occurrence
timing
CR position
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Operation
•–
The LEDs and STM3 are not indicating
error conditions. But, multiple sheets of
paper are always loaded from the ASF
Unit.
ASF Unit
1. Check if the Extension Spring Retard operates correctly
in the paper loading sequence.
Back side of ASF Unit
Extension Spring Retard
2. Check if the Paper Back Lever operates correctly in the
paper loading sequence.
Torsion Spring 6.45
Paper Back Lever
1. Set the Extension Spring Retard between the
Retard Roller Unit and the ASF Frame.
2. Set the Torsion Spring 6.45 between the ASF
Frame and the Paper Back Lever.
TROUBLESHOOTING Troubleshooting 53
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Table 3-14. Check point for the abnormal noise
Occurrence
timing
CR position
• Anytime
•Anywhere
Scanned image
Quality State
Detailed phenomenon
The abnormal noise occurs at the first
power on timing and during each
operation although the printing
operation is performed.
The bottom of the Carriage Unit contacts
the surface of the EJ Frame Assy.
The Carriage Unit collides to the Paper
Guide Upper Unit during each operation.
Detailed phenomenon
Defective
unit/part name
Main Frame
ASF Unit
EJ Frame Assy
Paper Guide Upper
Unit
1. Check if the grease on the Carriage path is sufficient. 1. Wipe off the remaining grease on the
1. Check if the Change Lever moves smoothly. 1. Replace the ASF Unit with a new one.
1. Check if the EJ Frame Assy is not bent up. 1. Replace the EJ Frame Assy with a new one.
1. Check if the Paper Guide Upper Unit is attached securely.
(check if it interferes with the Carriage Unit)
Check point Remedy
Table 3-15. Check point for poor scanned image quality
Defective
unit/part name
Check point Remedy
Carriage path and lubricate it on its frame.
1. Reassemble the Paper Guide Upper to the
Main Frame.
1. Check if there is not any dust on the Document Glass. 1. Remove the extraneous matter from the
Document Glass.
(Refer to Chapter 6 “MAINTENANCE”
(p.116).)
1. Check if there is not any dust on the LED. 1. Remove the extraneous matter from the
Document Glass (blow away the dusts).
• Scanned image is
not clear.
There are dusts on the Document Glass.
(white dots appear on the scanned
image)
There are dusts on the LED in the Rod
Lens Array.
(vertical stripes appear on the scanned
image)
The LED of CIS Assy. does not light up. CIS Assy. 1. Check if the LED lights up. 1. Replace the CIS Assy. with new one.
Upper Scanner
Housing
CIS Assy.
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Table 3-16. Check point for the poor printing quality
Print Quality
State
Detailed phenomenon
Defective
unit/part name
Check point Remedy
• Dot missing and
mixed colors
Ink is scarcely ejected to the Cap from
the Print Head.
Ink is ejected to the Cap from the Print
Head, but the SPC does not recover from
the error after cleaning or ink change.
1. Check if there is not any foreign material/damage around
the seal rubber part on the Cap Unit.
Seal rubber part
Ink System Unit
(Cap Unit)
2. Check if the Compression Spring is correctly mounted on
the Cap Unit.
1. Check if it returns to normal by performing CL operation
or replacing the Ink Cartridge.
Print Head
2. Check if the Print Head is not damaged. 2. Replace the Print Head with a new one.
Cleaner Blade
Main Board 1. Check if the Main Board is not damaged. 1. Replace the Main Board with a new one.
1. Check if the Cleaner Blade does not have paper dust or
bending.
Compression
Spring
1. Remove the foreign material around the seal
rubber parts carefully.
2. Replace the Ink System Unit with a new one.
1. Perform CL operation and the Ink Cartridge
replacement specified times.
If it doesn’t work, change the Print Head with
a new one.
1. Replace Ink System Unit with a new one.
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Table 3-16. Check point for the poor printing quality
Print Quality
State
Detailed phenomenon
Defective
unit/part name
Check point Remedy
1. Check if the Head FFC is securely connected to the Print
Head Connectors and the Main Board Connectors (CN1,
CN2).
1. Connect the Head FFC to the Print Head and
the Main Board Connectors.
• White streak /
abnormal
discharge
• White streak/
color unevenness
occurrence
Ink is ejected to the Cap from the Print
Head, but printing is not done at all after
cleaning or ink change, or abnormal
discharge occurs.
Vertical banding appears against the CR
movement direction. And, it looks like
uneven printing.
CR movement
direction
[Note]
If the problem is not solved, replace the
CR Motor with a new one.
Connectors
CN1
CN2 (back side)
Head FFC
Head
Print Head
FFC
2. Check if the Head FFC is not damaged. 2. Replace the Head FFC with a new one.
Print Head
1. Check if it returns to normal by performing CL operation
or replacing the Ink Cartridge.
1. Perform CL operation and the Ink Cartridge
replacement specified times.
If it doesn’t work, change the Print Head with
a new one.
Main Board Unit 1. Check if the Main Board is not damaged. 1. Replace the Main Board Unit with a new one.
Adjustment
1. For printing in the Bi-D mode, check if Bi-D Adjustment
has been performed properly.
1. Perform Bi-D Adjustment to eliminate
displacements between the upper and lower
rules. (Refer to Chapter 5 “ADJUSTMENT”
(p.106).)
1. Check if each segment is printed correctly in the Nozzle
Check Pattern.
Print Head
1. Perform Head Cleaning and check the Nozzle
Check Pattern. (Refer to Chapter 5
“ADJUSTMENT” (p.106).)
If the problem is not solved, replace the Print
Head with a new one.
1. Check if there is any foreign material on the Carriage
path.
1. Remove foreign objects from surface of the
Carriage path.
2. Check if the Main Frame has not been deformed. 2. Replace the Main Frame with a new one.
Main Frame
3. Check if the grease is enough on the Carriage path of the
Main Frame.
3. After wiping the grease on the Carriage path
with a dry, soft cloth, coat it with grease.
(Refer to Chapter 6 “MAINTENANCE”
(p.116).)
EJ Frame Assy 1. Check if the EJ Frame Assy has not been deformed 1. Replace the EJ Frame Assy with a new one.
TROUBLESHOOTING Troubleshooting 56
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Table 3-16. Check point for the poor printing quality
Print Quality
State
Detailed phenomenon
Micro banding appears horizontally
against the CR movement direction and
it appears with the same width.
CR movement
direction
Defective
unit/part name
Printer driver &
exclusive paper
Print Head
Check point Remedy
1. Check if the suitable paper is used according to the printer
driver setting.
1. Check if each segment is printed correctly in the Nozzle
Check Pattern.
1. Check if there is not any foreign material on the surface
of the PF Roller Unit.
PF Roller Unit
1. Use the suitable paper according to the printer
driver setting.
1. Perform the Head Cleaning and check the
Nozzle Check Pattern. (Refer to Chapter 5
“ADJUSTMENT” (p.106).)
If the problem is not solved, replace the Print
Head with a new one.
1. Clean the surface of the PF Roller Unit
carefully with the soft cloth.
• White streak/
color unevenness
occurrence
[Note]
If the problem is not solved, replace the
PF Motor with a new one.
The Star wheel mark against the CR
movement direction.
Printing is blurred.
PF Roller Unit
EJ Frame Assy
Printer driver &
exclusive paper
Print Head
2. Check if the PF Roller Unit is not damaged. 2. Replace the PF Roller Unit with a new one.
1. Check if the Star Wheel Holder does not come off. 1. Reassemble the Star Wheel Holder correctly.
2. Check if the surface of the EJ Frame Assy is flat. 2. Replace the EJ Frame Assy with a new one.
1. Check if the suitable paper is used according to the printer
driver setting.
1. Check if the correct Head ID is stored into the EEPROM
by using the Adjustment Program.
1. Use the suitable paper according to the printer
driver setting.
1. Input 13 digits code of the Head ID into the
EEPROM by using the Adjustment Program.
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Table 3-16. Check point for the poor printing quality
Print Quality
State
•Print start
position slip
• Ink stain of paper
Detailed phenomenon
The printing operation is correctly
performed. But, the top margin is
insufficient than usual one.
Ink stain occurs at the back, top end or
bottom end of the print paper.
Defective
unit/part name
LD Roller
Base Frame
Check point Remedy
1. Check if any paper dust is not adhered to the surface of
the LD Roller.
LD Roller
1. Check if the Base Frame is free of ink stain, especially its
ribs near the Porous Pad Paper Guide Front.
Porous Pad Paper Guide Front
Base Frame
1. Set a cleaning sheet in the ASF up side
down.
Then holding the top edge, try to load the
paper from the Printer driver. The micro pearl
on the LD Roller surface is removed. To
remove severe smear, staple a cloth
moistened with alcohol to a post card and
clean the roller in the same manner. As for
the cleaning sheet, refer to page 48 “Remedy
of the Paper out error”
* If the problem is not solved, replace the LD
Roller with a new one.
1. Clean the Base Frame with a soft cloth.
2. Check if heaps of ink are not formed on Porous Pad Paper
Guide Front on the Base Frame.
EJ Roller 1. Check if the EJ Roller does not have the ink stain. 1. Clean the EJ Roller with a soft cloth.
PF Roller Unit 1. Check if the PF Roller Unit does not have the ink stain. 1. Clean the PF Roller Unit with a soft cloth.
2. Replace the Porous Pad Paper Guide Front
with a new one. (T.B.D.)
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Table 3-16. Check point for the poor printing quality
Print Quality
State
• Ink stain of paper
Detailed phenomenon
Ink sticks to other than the print area of
the paper, resulting in contamination
Defective
unit/part name
Print Head
Paper Guide Upper
Unit
EJ Frame Assy
Check point Remedy
1. Check if the Print Head Cover does not have the ink drop. 1. Clean the Print Head Cover carefully with a
soft cloth.
1. Check if the Paper Guide Upper Unit does not have the
ink stain.
1. Check if the Star Wheel Rollers does not have the ink
stain.
Star Wheel Holders
1. Clean the Paper Guide Upper Unit with a soft
cloth.
1. Clean the Star Wheel Rollers with a soft
cloth.
TROUBLESHOOTING Troubleshooting 59
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DISASSEMBLY/ASSEMBLY
CHAPTER
4
Page 61
EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.1 Overview
This section describes procedures for disassembling the main components of the
product. Unless otherwise specified, disassembled units or components can be
reassembled by reversing the disassembly procedure.
Procedures which, if not strictly observed, could result in personal injury are described
under the heading “WARNING”.
“CAUTION” signals a precaution which, if ignored, could result in damage to equipment.
Important tips for procedures are described under the heading “CHECK POINT”.
If the assembly procedure is different from the reversed disassembly procedure, the
correct procedure is described under the heading “REASSEMBLY”.
Any adjustments required after reassembly of components or parts are described under
the heading “ADJUSTMENT REQUIRED”.
When you have to remove any components or parts that are not described in this
chapter, refer to the exploded diagrams in the appendix.
4.1.1 Precautions
See the precautions given under the handling “WARNING” and “CAUTION” in the
following columns when disassembling or assembling Stylus CX4300/CX4400/
CX5500/CX5600/DX4400/DX4450.
W A R N I N G
Disconnect the power cable before disassembling or
assembling the printer. If you need to work on the printer with
power applied, strictly follow the instructions in this manual.
Always wear gloves for disassembly and reassembly to avoid
injury from sharp metal edges.
To protect sensitive microprocessors and circuitry, use static
discharge equipment, such as anti-static wrist straps, when
accessing internal components.
C A U T I O N
Make sure that there is enough work space for disassembly/
reassembly.
Use only recommended tools for disassembling, assembling or
adjusting the printer.
Observe the specified torque when tightening screws.
Apply lubricants as specified.
(See Chapter 6 “ MAINTENANCE (p108)” for details.)
Since a prototype was used to illustrate these disassembly and
reassembly procedures, the appearance of some parts may
differ from those on actual product. The procedures
themselves, however, are accurate for the retail model.
When using compressed air products; such as air duster, for
cleaning during repair and maintenance, the use of such
products containing flammable gas is prohibited.
4.1.2 Tools
Use only specified tools to avoid damaging the printer.
Table 4-1. Tools
Name Supplier Parts No.
(+) Phillips screwdriver #1
(+) Phillips screwdriver #1
Flathead screwdriver
Tweezer
EPSON 1080530
EPSON 1080532
EPSON 1080527
EPSON 1080561
DISASSEMBLY/ASSEMBLY Overview 61
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.1.3 Work Completion Check
If any service is made to the printer, use the checklist shown below to confirm all
works are completed properly and the printer is ready to be returned to the user.
Table 4-2. Work Completion Check
Classification Item Check Point Status
Self-test Is the operation normal?
ON-line Test Is the printing successful
Printhead
Carriage
Mechanism
Printer Unit
Paper Feeding
Mechanism
Scanner unit Mechanism
Is ink discharged normally from all
the nozzles?
Does it move smoothly?
Is there any abnormal noise during its
operation?
Is the CR Motor at the correct
temperature? (Not too hot to touch?)
Is paper advanced smoothly?
No paper jamming?
No paper skew?
No multiple feeding?
No abnormal noise?
Is the PF Motor at correct
temperature?
Is the paper path free of any
obstructions?
Is the glass surface free of dirt?
Is the carriage path free of any
obstructions?
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Table 4-2. Work Completion Check
Classification Item Check Point Status
Does it move smoothly?
Carriage
mechanism
Scanner unit
LED
Adjustment
Lubrication
Function ROM Version Version:
Packing
Others
Specified
Adjustment
Specified
Lubrication
Ink Cartridge
Protective
materials
Attachments,
Accessories
Does it move together with the
scanner unit?
Is there any abnormal noise during its
operation?
Does it normally turn on?
Is the white reflection test near home
position done correctly?
Are all the adjustment done
correctly?
Are all the lubrication made at the
specified points?
Is the amount of lubrication correct?
Are the ink cartridges installed
correctly?
Have all relevant protective materials
been attached to the printer?
Have all the relevant items been
included in the package?
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
Checked
Not necessary
DISASSEMBLY/ASSEMBLY Overview 62
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.1.4 Caution After Repair (T.B.D)
Before shipping the product after repair, be sure to secure the CR Unit following the
procedure below.
HOW TO SECURE THE CR UNIT BEFORE PACKING
(1) Move the CR Unit to the Home position.
(2) Lock the Carriage Lock toward the front of the printer with a flathead screwdriver.
(See “4.6.1 Printhead (p75)”)
(3) Move the CR Unit to the center slightly until it comes in contact with the Carriage Lock.
(4) Attach the center portion ( ) of a strong tape to the Cartridge Cover located on the carriage.
(5) Attach the right portion ( ) of the strong tape to the Upper Housing.
(6) Attach the left portion ( ) of the strong tape to the left side of the carriage.
(7) Check to see that the CR Unit can move slightly between the Home position and the
Carriage Lock position. Then bring the CR unit back into contact with the Carriage
Lock, and pack the printer.
Carriage Lock
TBD
CR Unit
Figure 4-1. Securing CR Unit
Strong Tape
Upper Housing
Cartridge Cover
DISASSEMBLY/ASSEMBLY Overview 63
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.2 Disassembly Procedures
This section explains the procedures for disassembling the product.
Unless otherwise stated, reassembly should be carried out in the reverse order of the disassembly procedure.
For detailed engagement relations among main components, refer to the exploded diagrams in the Appendix.
START
“4.3.3 Document Cover/
ASF Cover/Support
Arm
(p66)”
“4.3.4 Scanner Unit/
Middle Case/Panel Unit
(p67)”
“4.4 Removing Printer
Mechanism
(p71)”
“4.6.2 Hopper
(p78)”
“4.5.1 Main Board
(p73)”
“4.6.9 Main Frame
(p87)”
“4.6.10 LD
Roller/ASF Unit
(p90)”
“4.6.11 Waste
Ink Pads (p92)”
“4.3.1 Paper Support
Assy.
(p65)”
“4.6.1 Printhead
(p75)”
“4.6.5 CR Unit/
Timing Belt
(p81)”
“4.3.2 Stacker Assy.
(p65)”
“4.6.3 CR Scale
(p79)”
“4.6.4 CR Motor
(p80)”
The Shortest Way to Remove the Main Frame
The parts/units shown in yellow-shaded box can be removed faster than following the
flowchart. See the section below for the details.
“4.7 The Shortest Way to Remove the Main Frame. (p95)”
“4.6.6 Ink System removal (p83)”
“Ink System
(Cap Assy)
(p83)”
“Ink System
(Pump Assy)
(p83)”
“4.8 Scanner Section (p96)”
“4.8.1 Upper Scanner
Housing
(p96)”
“4.8.2 CIS Assy./CIS
Carrier Assy./Scanner
FFC
(p97)”
“4.6.8 EJ Frame
Assy/EJ Roller
(p86)”
“4.6.12 PF Roller
(p93)”
“4.6.13 PF Motor
(p94)”
“4.8.3 Scanner Motor
Unit/Driven Pulley
(p99)”
“4.6.7 Power
Supply Board
(p85)”
Figure 4-2. Disassembling Flowchart
DISASSEMBLY/ASSEMBLY Disassembly Procedures 64
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.3 Printer Section
4.3.1 Paper Support Assy.
Part/Unit that should be removed before removing Paper Support Assy.
None
Removal Procedure
1. Release the Paper Support Assy. from the guide pins (x2) of the Lower Case, and
remove the Paper Support Assy. from the Lower Case.
Paper Support Assy.
Lower Case
Guide Pins
4.3.2 Stacker Assy.
Part/Unit that should be removed before removing Stacker Assy.
None
Removal Procedure
1. Open the Stacker Assy.
2. Press in the white pin on the left with a precision screwdriver or a similar tool to
release the left side of the Stacker Assy. Then remove the Stacker Assy. pulling
out its pin on the right from the Lower Case.
Figure 4-3. Removing Paper Support Assy.
Stacker Assy.
Left side
Press in the
white pin
Figure 4-4. Removing Stacker Assy.
Right side
DISASSEMBLY/ASSEMBLY Printer Section 65
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.3.3 Document Cover/ASF Cover/Support Arm
C A U T I O N
Part/Unit that should be removed before removing Document Cover /ASF
Cover /Support Arm
None
Removal Procedure
1. Remove the Document Cover pulling out its left and right guide pins from the
holes on the Scanner Unit.
When disassembling/assembling the Scanner Unit after removing
the Document Cover, make sure to protect the document glass
from damage and dirt. Also, pay extra care to keep the Document
Cover mat surface clean.
Mat
Document Cover
Guide Pin
Document Glass
3. Open the Scanner Unit.
4. Press the upper left and right sides of the Support Arm inward to release its upper
left and right guide pins from the Scanner Unit.
5. Remove the Support Arm releasing its lower left and right guide pins from the
guide rails on the Middle Case.
Scanner Unit
Support Arm
Guide Pin
Guide Rail
Figure 4-7. Removing Support Arm
Install the Support Arm as shown. Be careful not to install it
upside-down or back-to-front.
Figure 4-5. Removing Document Cover
2. Remove the ASF Cover pulling out its left and right holes from the guide pins on
the Scanner Unit.
ASF Cover
Scanner Unit
Figure 4-8. Installing Support Arm
Guide Pin
Figure 4-6. Removing ASF Cover
DISASSEMBLY/ASSEMBLY Printer Section 66
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.3.4 Scanner Unit/Middle Case/Panel Unit
Part/Unit that should be removed before removing Scanner Unit /Middle
Case /Panel Unit
Document Cover / ASF Cover / Support Arm
Removal Procedure
1. Remove the screws (x7) that secure the Middle Case.
1-1. Open the Scanner Unit, and remove the screws (x3).
Scanner Unit
C.B.P 3X10 (Torque: 6±1Kgf.cm)
Figure 4-9. Removing Screws securing Middle Case (front side)
1-2. Remove the screws (x2) on the rear and the screws (x2) on the both ends of
the ASF.
2. While pushing the Lower Case with your thumb in the direction of the arrow, pull
the Scanner Unit toward you to release it from the following pin and hook.
The left guide pin (x1) on the Lower Case.
The hook (x1) on the Middle Case.
Hinge section of Scanner Unit
Guide Pin on
Lower Case
Hook on Middle Case
Scanner Unit
Lower Case
Push
Pull
Figure 4-11. Removing Scanner Unit /Middle Case /Panel Unit (1)
3. Push the Scanner in the direction of the arrow to release it from the following pin.
The right guide pin (x1) on the Lower Case.
Top view
C.B.P 3X10 (Torque: 6±1Kgf.cm)
Figure 4-10. Removing Screws securing Middle Case (rear side)
Scanner Unit attached position
Figure 4-12. Removing Scanner Unit /Middle Case /Panel Unit (2)
Guide Pin
DISASSEMBLY/ASSEMBLY Printer Section 67
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4. While pushing outward on the right side of the Lower Case to widen it, disengage
its tabs (x2) from the square holes (x2) of the Middle Case, and pull the Middle
Case upward.
Middle Case
Hole
Tab
Figure 4-13. Removing Scanner Unit /Middle Case /Panel Unit (3)
5. While pressing the left side of the Middle Case inward (press the “hole” points one
by one), disengage the tabs (x2) of the Lower Case from the square holes (x2) of
the Middle Case, and pull the Middle Case upward.
Middle Case
6. Tilt the Scanner Unit /Middle Case /Panel Unit as shown, and slightly move them
frontward to disengage the left front tab of the Middle Case.
Tab
Figure 4-15. Removing Scanner Unit /Middle Case /Panel Unit (5)
7. Disconnect the following cables (x2) and FFC (x1) from the Main Board Assy.,
and remove the Middle Case, the Scanner Unit and the Panel Unit as a set from the
Lower Case.
J6: Scanner Motor cable
J5: Scanner FFC (a ferrite core for the FFC is attached to the Shield Plate)
J3: Panel Board cable
Hole
Tab
Figure 4-14. Removing Scanner Unit /Middle Case /Panel Unit (4)
C A U T I O N
The cables/FFC of the Scanner Unit and Panel Unit are connected
to the Main Board. When moving the Scanner Unit /Middle Case /
Panel Unit at the next step, be careful not to move them too much.
Lower Case
Scanner Motor Cable
Scanner FFC
Middle Case, Scanner
Unit and Panel Unit
Panel Board cable
Figure 4-16. Removing Scanner Unit /Middle Case /Panel Unit (6)
DISASSEMBLY/ASSEMBLY Printer Section 68
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
Removing the Scanner Unit from the Middle Case
1. Pull out the cable and FFC from the cutout of the Middle Case, and remove the
Scanner Unit from the Middle Case.
Scanner Unit
Cutout
Middle Case
Figure 4-17. Removing Scanner Unit
Removing the Panel Unit from the Middle Case
C A U T I O N
The Panel Unit cable is fixed being routed through the tabs on the
backside of the Middle Case. When sliding the Panel Unit at the
next step, be careful not to move it too much.
1. Lift the front end of the Panel Unit to release its tab (A). Then slide the Panel Unit
in the direction of the arrow to remove it releasing the other tabs (x5) and the hook.
Middle Case
Panel Unit
Tab (A)
Pull
upward
Tabs
Hook
Figure 4-18. Removing Panel Unit (1)
2. Release the Panel Unit cable from the tabs (x4) on the backside of the Middle
Case.
3. Pull out the Panel Unit cable through the cutout of the Middle Case to remove the
Panel Unit from the Middle Case.
Backside of the
Middle Case
Panel Unit Cable
Tab
Panel Unit Cable
Cutout
Figure 4-19. Removing Panel Unit (2)
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
REASSEMBLY OF SCANNER UNIT /MIDDLE CASE /PANEL UNIT
Installing the Panel Unit to the Middle Case
1. Put the Panel Unit cable through the cutout of the Middle Case.
(refer to Figure 4-19)
2. Slide the Panel Unit front-to-rear on the Middle Case engaging the tabs and hooks
shown below. Make sure to slide the Panel Unit until the tab A clicks and the unit
is secured.
Tab (A)
Middle Case
Figure 4-20. Installing Panel Unit
3. Route the Panel Unit cable through the tabs (x4) on the backside of the Middle
Case. (refer to Figure 4-19)
Installing the Panel Unit/Scanner Unit/Middle Case to the Lower Case
1. Put the Scanner FFC and the Scanner Motor cable through the cutout of the
Middle Case.
Panel Unit
Tabs
Hooks
2. Place the Panel Unit/Scanner Unit/Middle Case as shown in Figure 4-16.
3. Route and connect the cables/FFC to the Main Board Assy. as shown below. Refer
to Figure 4-27 for the connector layout on the Main Board.
• Scanner Motor cable: J6 connector on the Main Board
Route through the hooks (
• Scanner FFC: J5 connector on the Main Board
x2) as shown.
Put it through the ferrite core, and attach the core to the shield plate with
double-sided tape. Make sure to put the core under the hooks (
on top of the rib (
• Panel Board: J3 connector on the Main Board
Scanner Motor cable
x1).
Rib
Panel Board cable
Ferrite Core
x2) and
Scanner FFC
Hook
Figure 4-22. Connecting Scanner Motor Cable, Scanner FFC, Panel Cable
4. Secure the Middle Case (with the Panel Unit/Scanner Unit attached) to the Lower
Case engaging the left front tab (x1) (refer to Figure 4-15), then the tabs (x4) and
square holes (x4) on either sides. (refer to Figure 4-13, Figure 4-14)
Left side
5. Engage the right hinge of the Scanner Unit to the Lower Case (refer to Figure
4-12), then engage the left hinge of the Scanner Unit to the Lower Case and the
Middle Case. (refer to Figure 4-11)
6. Screw the Panel Unit/Scanner Unit/Middle Case to the Lower Case. (refer to
Figure 4-9, Figure 4-10)
Cutout for passing Scanner FFC
and Scanner Motor Cable
Scanner Motor cable
Scanner FFC
Figure 4-21. Routing Scanner FFC and Scanner Motor Cable
DISASSEMBLY/ASSEMBLY Printer Section 70
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.4 Removing Printer Mechanism
Part/Unit that should be removed before removing Printer Mechanism
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit
Removal Procedure
1. Remove the screws (x6) that secure the Printer Mechanism to the Lower Case.
2. Move the Paper Guide to the right side.
Printer Rear
Screw
Printer Mechanism
Paper Guide
Lower Case
3. Release the Grounding Spring from the hooks (x2) and remove it
4. Remove the screws (x2) that secure the Shield Plate, and remove it from the Lower
Case.
Grounding Spring
Hooks
C.B.S 3X10 (Torque: 6±1Kgf.cm)
Shield Plate
Screw
Lower Case
Figure 4-24. Tab Position on Lower Case
5. The tabs (x6) on the Lower Case shown below are securing the Printer
Mechanism. Push outward on the left, right, and front sides of the Lower Case to
widen it, and release the Printer Mechanism from the tabs (x6).
Lower Case
Push outwards
Push outwards
Push outwards
Tabs
Figure 4-25. Tab Position on Lower Case
Screw
C.B.P 3X6 (Torque: 6±1Kgf.cm)
Figure 4-23. Removing Printer Mechanism (1)
DISASSEMBLY/ASSEMBLY Removing Printer Mechanism 71
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
6. Carefully lift up the front end of the Printer Mechanism to pull the ASF Unit
sections out from the Lower Case, and remove the Printer Mechanism.
ASF Unit section (right)
Printer Mechanism
ASF Unit section (left)
Lower Case
Figure 4-26. Removing Printer Mechanism (2)
DISASSEMBLY/ASSEMBLY Removing Printer Mechanism 72
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.5 Removing Board
4.5.1 Main Board
Part/Unit that should be removed before removing Main Board
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit /Printer Mechanism /Hopper
Removal Procedure
1. Disconnect the following connector cables (x4) and FFCs (x2) from the
connectors on the Main Board Assy.
• CN1: Head FFC
• CN2: Head FFC (Backside)
• J1: Power Supply Board cable
• J7: CR Motor cable
• J8: PF Motor cable
• J9: PE Sensor cable
Not used
CN2 (backside)
CN1
J5J6
2. Remove the screws (x4), and remove the Main Board Assy.
Head FFCs
Head FFCs
CR Motor Cable
C.B.S 3X6 (Torque: 8±1Kgf.cm)
Shield Plate
PE Sensor Cable
Main Board Assy.
Power Supply Cable
PF Motor Cable
Figure 4-28. Removing Main Board (1)
3. Remove the Grounding Plate Clip from the Main Board Assy.
4. Remove the Shield Plate from the Main Board.
J3
Main Board Assy.
J9
J7
J8J1
Shield Plate
Figure 4-27. Connector Layout of Main Board
Grounding Plate Clip
Figure 4-29. Removing Main Board (2)
DISASSEMBLY/ASSEMBLY Removing Board 73
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
A D J U S T M E N T
R E Q U I R E D
After replacing the Main Board, perform the following
adjustments (T.B.D.). (Refer to Chapter 5 “ ADJUSTMENT
(p100)”)
1. “EEPROM data copy” (only after replacement)
2. “Destination Setting”
3. “USB ID Input”
(only after replacement*)
(only after replacement*)
4. “Waste Ink Pad Counter” (Ink Pads must be replaced)
5. “Head ID Input”
(only after replacement*)
6. “TOP Margin Adjustment” (only after replacement*)
7. “First Dot Adjustment”
8. “Head Angular Adjustment”
9. “Bi-D Adjustment”
(only after replacement*)
(only after replacement*)
(only after replacement*)
10.“PF Band Adjustment” (only after replacement*)
11. “CR Heat Protection Control”
Note * : (EEPROM Copy NG)
(only after replacement*)
]
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
2.
4.6 Disassembling Printer Mechanism
Open the Cartridge Cover and remove all the Ink Cartridges from the CR Unit.
3. Release the FFCs from the tabs.
4.6.1 Printhead
Part/Unit that should be removed before removing Printhead
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit
Removal Procedure
1. Unlock the Carriage Lock with a flathead screwdriver or a similar tool, and
move the CR Unit to the center of the printer.
FFCs
Cartridge Cover
Tabs
Locked
Carriage Lock
Unlocked
CR Unit
Figure 4-30. Unlocking Carriage Lock and Moving CR Unit to the Center
Figure 4-31. Releasing FFCs
4. Disconnect the Head FFCs (x2) that are connected to the CSIC Board and the
CR Encoder Board.
Head FFCs
Figure 4-32. Disconnecting Head FFCs
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 75
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
5. Release the tabs (1) and (2) with a flathead precision screwdriver, and remove
the Holder Board Assy. upward.
CR Unit
Tab (2)
Tab (1)
Tab (2)
Tab (1)
CR Unit
Tab (1)
Holder
Board Assy.
Tab (2)
6. Release the tab and pull out the blade of the Sub FFC Guide from the slit, and
remove the Sub FFC Guide pulling out the guide pin (x1) from the notch.
Blade
Slit
Notch
Guide Pin
Sub FFC Guide
Notch
Figure 4-34. Removing Sub FFC Guide
C A U T I O N
Do not touch or damage the nozzles or the ink supply needles of the
Printhead.
7. Remove the screw (x3) and lift up the Printhead with a longnose pliers.
Holder Board Assy.
Figure 4-33. Removing Holder Board Assy
C.B.P 2.5X8 (Torque: 3±1Kgf.cm)
Figure 4-35. Removing Printhead (1)
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 76
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
8. Remove the Head FFC (x1) from the connector (x1), and remove the
Printhead.
Head FFC
When installing the Holder Board Assy, make sure to check if
the assy is properly installed in the right position. The assy is
likely to be installed in the wrong position.
The Ink Position Label is not included in the Cartridge Cover.
When replacing the Cartridge Cover, order the Ink Position
Label separately and attach the label as shown below.
Printhead
Figure 4-36. Removing Printhead (2)
When installing the Sub FFC Guide, follow the steps below.
1. Insert the blade between the ribs.
2. Insert the guide pin into the notch.
3. Push down and secure the Sub FFC Guide in place.
Sub FFC Guide
Guide Pin
Notch
Ribs
Blade
A D J U S T M E N T
R E Q U I R E D
Ink Position Label
Attach the label here. The chipped
corner must come to the upper left.
Cartridge Cover
Figure 4-38. Installing Ink Position Label
After removing/replacing the Printhead, perform the adjustment
in the following order (T.B.D.). (Refer to Chapter 5 “
ADJUSTMENT (p100)”)
1. “Ink Charge”
2.
“Head ID Input”
(only after replacement)
(only after replacement)
3. “TOP Margin Adjustment”
4. “First Dot Adjustment”
5. “Head Angular Adjustment”
6. “Bi-D Adjustment”
7. “PF Band Adjustment”
Figure 4-37. Installing Sub FFC Guide
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 77
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.2 Hopper
Part/Unit that should be removed before removing Hopper
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism
Removal Procedure
1. Pull open the Bearing slightly (Arrow ), to release the guide pin (A).
2. Remove the Hopper (Arrow ) pulling out the guide pin (B).
3. Remove the Compression Spring 1.94.
Guide Pin (A)
Bearing
Before installing the Hopper, be sure to adjust the position of the
LD Roller following the steps below.
1. Unlock the Carriage Lock. (See “4.6.1 Printhead (p75)”)
2. Move the CR Unit to the center of the printer.
3. Adjust the position of LD Roller turning the EJ Roller clockwise.
• LD Roller position: the flat part facing inward.
• Paper Back Lever position: inner most.
Flat part of LD Roller
Inward
Paper Back Lever
EJ Roller
Compression Spring 1.94
Hopper
Guide Pin (B)
Figure 4-40. Installing Hopper and Compression Spring 1.94
Figure 4-39. Removing Hopper and Compression Spring 1.94
A D J U S T M E N T
R E Q U I R E D
After replacing the Hopper, perform the following adjustment
(T.B.D.). (Refer to Chapter 5 “ ADJUSTMENT (p100)”)
1. “TOP Margin Adjustment”
2. “PF Band Adjustment”
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.3 CR Scale
C A U T I O N
Part/Unit that should be removed before removing CR Scale
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit
Removal Procedure
1. Release the right end of the CR Scale from the tab.
2. Release the CR Scale from the slit of the CR Encoder Sensor.
Pay attention to the following instructions:
Do not touch the CR Scale with bare hands.
Do not damage the CR Scale.
Do not stretch Extension Spring 3.289 too much.
CR Scale
Tab
3. Release the Extension Spring 3.289 from the hook of the Main Frame.
4. Rotate the CR Scale 90 degrees as shown in the figure and remove the scale
from the Main Frame.
Chipped
90 º
Hook
Extension Spring 3.289
CR Scale
Figure 4-42. Removing CR Scale (3)
When installing the CR Scale, pay attention to the following
instructions.
The CR Scale must be set between the sides of the CR Encoder
Sensor, but not touching either side. If the CR Scale is rubbing
against either wall (emitter or receiver), it should be reinstalled.
Chipped part of the CR Scale should be facing upward.
Extension Spring 3.289 should not be twisted.
Slit of CR Encoder Sensor
CR Scale
Figure 4-41. Removing CR Scale (1)
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 79
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.4 CR Motor
Part/Unit that should be removed before removing CR Motor
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism / CR Scale
Removal Procedure
1. Disconnect the Head FFCs (CN1,CN2) from the Main Board, and release the
CR Motor connector cable from the tabs (x5) on the Main Frame.
2. Disconnect the CR Motor Connector Cable (J7) from the Main Board.
Tabs
CR Motor
Head FFCs
CR Motor Connector Cable
Figure 4-43. Disconnecting CR Motor Connector Cable
Main Board
3. Loosen the tension of the Timing Belt by pressing the Driven Pulley Holder in
the direction of the arrow as shown in the figure, and release the Timing Belt
from the pinion gear of the CR Motor.
4. Remove the screws (x2), and remove the CR Motor from the Main Frame.
Driven Pulley Holder
Timing Belt
CR Motor
Pinion Gear
Timing Belt
C.B.S 3X6 (Torque: 6±1Kgf.cm)
C A U T I O N
After releasing the Timing Belt, temporarily secure the belt to the
Cartridge Cover with a tape or the like so as not to allow the grease
to come in contact with the Timing Belt. Contaminating the belt
Main Frame
Figure 4-44. Releasing Timing Belt and Removing CR Motor
with grease can result in malfunction of the printer.
A D J U S T M E N T
R E Q U I R E D
After replacing the CR Motor, perform the following adjustment
(T.B.D.). (Refer to Chapter 5 “ ADJUSTMENT (p100)”)
1. “First Dot Adjustment”
2. “Head Angular Adjustment”
3. “Bi-D Adjustment”
4. “CR Heat Protection Control” (only after replacement)
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 80
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.5 CR Unit/Timing Belt
Part/Unit that should be removed before removing CR Unit/Timing Belt
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case / Panel Unit /
Printer Mechanism / Print Head / Ink System (Cap Assy) / CR Scale / CR Motor
C A U T I O N
Removal Procedure
CR Unit Removal
1. Remove the screw (x1), and remove the CR Scale Holder.
2. Remove the CR Unit by sliding it in the direction of the arrow.
After releasing the Timing Belt, temporarily secure the belt to the
Cartridge Cover with a tape or the like so as not to allow the grease
to come in contact with the Timing Belt. Contaminating the belt
with grease can result in malfunction of the printer.
CR Unit
CR Scale Holder
Insert the wavy-surface part of the Timing Belt into the groove
of the CR Unit.
When installing the Head FFC, follow the steps below.
1. Put the Head FFC through the Hole of the Main Frame.
Main Frame
Ribs
Head FFC
Hole
Figure 4-47. Installing Head FFC (1)
2. Secure the Head FFC with Rib A, and C.
Ribs
C.B.S 3X6 (Torque: 8±1Kgf.cm)
Figure 4-45. Removing CR Scale Holder
Timing Belt Removal
1. Remove the Timing Belt from the groove of the CR Unit.
.
Head FFC
Figure 4-48. Installing Head FFC (2)
>>To be continued to the next page.
Timing Belt
Groove of CR Unit
Figure 4-46. Removing Timing Belt
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 81
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
>> From the previous page.
3. Fold back the Head FFC and secure it with Rib A again.
Head FFC
Figure 4-49. Installing Head FFC (3)
4. Connect the Head FFC to CN1, CN2 of the Main Board.
(see “4.5.1 Main Board (p73)”)
5. Arrange FFC1 on top of FFC2.
CN1,CN2
FFC2
FFC1
Figure 4-50. Installing Head FFC (4)
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4.6.6 Ink System removal
Part/Unit that should be removed before removing Ink System
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism
C A U T I O N
Removal procedure
Ink System (Cap Assy)
C A U T I O N
Do not touch or damage the Sealing Rubber or the Head
Cleaner when performing the following work.
Mark the connection location before removing the Ink Tube.
When removing the Ink System, follow the procedure below.
1. Detach the Cap Assy.
2. Detach the Dump Assy.
3. Remove the whole Ink System
Head Cleaner
Cap Assy
Sealing Rubber
Pump Assy
The hook A of the Lower Housing is breakable. When releasing the
hook to detach the Cap Assy at the next step, be careful not to
break it.
2. Detach the Ink Tube from the Cap Assy, and remove the Cap Assy.
Cap Assy
Ink Tube
Figure 4-52. Removing Ink System (1)
Ink System (Pump Assy)
1. Remove the “Main Board (p73)”
2. Remove the “Printhead (p75)”
3. Remove the “CR Scale (p79)”
4. Remove the “CR Motor (p80)”
5. Remove the “CR Unit/Timing Belt (p81)”
6. Remove the “Ink System (Cap Assy) (p83)”
7. Remove the “Main Frame (p87)”
8. Insert a flathead screwdriver between the tab (1) and the rib, and release the
tab (1) while pushing it in the direction of the arrow
.
9. Release the tab (2) in the direction of the arrow .
1. Release the hook A and B that secure the Cap Assy, and detach the Cap Assy.
Cap Assy
Hook A
Hook B
Tab (2)
Pump Assy.
Tab (1)
Rib
Pump Assy.
Figure 4-53. Removing Ink System (2)
Figure 4-51. Removing Ink System (1)
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
10. Pull out the Ink Tube and the Tube Stopper from the connector of the Waste
Ink Pads, and draw out the tube from the Ink Tube passage.
11. Remove the pump system.
Ink Tube Connector of Waste Ink Pad
Ink Tube Passage
Figure 4-54. Removing Ink System (3)
When installing the Cap Assy, be sure to attach the Ink Tube
up to the edge as shown below without any space between.
Ink Tube
When installing the Cap Assy, follow the steps described below.
1. Arrange the tube between the ribs as shown in the figure below.
2. Place the Cap Assy and match the tabs (x2) and lock them.
(refer
to Figure 4-51)
3. Attach the Ink Tube.
Ink Tube
Ribs
(refer to Figure 4-52)
Figure 4-57. Installing Ink System
When installing the Pump Assy, follow the steps described below.
1. Match the tabs (x2) of the Pump Assy with the positioning holes
(x2) of the Frame Base.
(refer to Figure 4-53)
2. Pass the Ink Tube through the Ink Tube passage, and insert the
tube into the connector.
(refer to Figure 4-54)
3. Arrange the tube with the Tube Stopper as shown in the figure.
4. Attach the Ink Tube into the hole of the connector of Waste Ink Pad.
Figure 4-55. Installing Ink Tube
Tube Stopper
Ink Tube
Connector
When inserting the Ink Tube into the connector, be careful not
to touch the Paper Back Lever.
10±1 mm
Ink Tube
Paper Back Lever
Figure 4-58. Installing Ink Tube (2)
Figure 4-56. Paper Back Lever behind Ink Tube
>>To be continued to the next page.
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4.6.7 Power Supply Board
Part/Unit that should be removed before removing LD Roller/ASF Unit
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism
Removal procedure
1. Disconnect the connector cable from the connector (J1) of the Main Board.
J1
Figure 4-59. Removing Power Supply Board (1)
2. Remove the screw (x1), and remove the Power Supply Board in the direction
of the arrow.
C A U T I O N
Do not turn the Power Supply Board upside down as shown in the
figure below. This figure is only used to show the location of the
parts and the harness arrangement.
3. Pull out the connector cable through the hole of the Frame Base.
Bottom
Power Supply Board
Connector Cable
Hole
Figure 4-61. Removing Power Supply Board (3)
When installing the Power Supply Board, arrange the connector
cable into the slot as shown below.
Frame Base
C.B.P 3X6 (Torque: 6±1Kgf.cm)
Power Supply Board
Figure 4-60. Removing Power Supply Board (2)
Connector Cable
Slot
Figure 4-62. Installing Power Supply Board
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4.6.8 EJ Frame Assy/EJ Roller
Part/Unit that should be removed before removing EJ Frame Assy/EJ Roller
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism
C H E C K
P O I N T
Removal procedure
EJ Frame Assy removal
1. Remove the Grounding Spring from the EJ Frame Assy.
2. Remove the screws (x2) and remove the EJ Frame Assy.
When installing Spur Gear, 59. 6 and the EJ Roller, be sure to
install new ones. These parts cannot be reused.
EJ Frame Assy
Grounding Spring
C.B.P 3X8 (Torque: 6±1Kgf.cm)
EJ Roller Removal
3. Insert a flathead screwdriver between the rib and the Spur Gear, 59.6 and push
the gear in the direction of the arrow, and remove the Spur Gear, 59.6.
Rib
Spur Gear,59.6
EJ Roller
Figure 4-64. Removing EJ Roller (1)
4. Pull the bearing slightly (Arrow ), and remove the EJ Roller (Arrow ).
Bearing
Figure 4-63. Removing EJ Frame Assy.
EJ Roller
Figure 4-65. Removing EJ Roller (2)
A D J U S T M E N T
R E Q U I R E D
After replacing the EJ Roller, perform the following
adjustment (T.B.D.).
(Refer to Chapter 5 “ ADJUSTMENT (p100)”)
1. “Head Angular Adjustment”
2. “Bi-D Adjustment”
3. “PF Band Adjustment” (only after removal)
When the EJ Frame Assy or EJ Roller is reassembled,
perform the required lubrication.
(Refer to Chapter 6 “ MAINTENANCE (p108)”)
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4.6.9 Main Frame
Part/Unit that should be removed before removing LD Roller/ASF Unit
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism / Hopper / Main Board / Print Head / CR Scale /
CR Motor / CR Unit / Timing Belt
Removal procedure
1. Remove the screw and the Grounding Spring, and remove the Shield Plate L
while releasing the hooks and the positioning holes.
Shield Plate L
Positioning Hole
Hooks
C.B.S 3X6 (Torque: 6±1Kgf.cm)
Figure 4-66. Removing Shield Plate L
Grounding Spring
4. Remove the Extension Springs (x3) from the hooks of the Main Frame and the
guide pins of the Upper Paper Guide.
Main Frame
Upper Paper Guide
Extension Springs
Figure 4-68. Removing Extension Springs
5. Remove the screws (x4) that secure the Main Frame to the Frame Base.
2. Remove the PF Roller Grounding Spring.
3. Remove the Driven Pulley Holder from the notch of the Main Frame.
Main Frame
Grounding Spring
Driven Pulley Holder
C.B.S-(P2) 3X6 (Torque: 8±1Kgf.cm)
C.P 3X4 (Torque: 4±1Kgf.cm)
Figure 4-67. Removing Grounding Spring and Driven Pulley Holder
Figure 4-69. Removing Main Frame (1)
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6. While detaching the shaft of the LD Roller from the LD Holder Shaft Assy,
remove the Main Frame.
LD Holder Shaft Assy
Main Frame
LD Roller
Upper Paper Guide
Figure 4-70. Removing Main Frame (2)
7. Release the connector cable of the PE Detector from the tabs (x4).
LD Holder Shaft Assy
Tabs
9. Release the tab (x1), and remove the PE Detector Assy.
PE Detector Assy
Tab
Figure 4-73. Removing PE Detector Assy
10. Release the tabs (x6) and remove the Upper Paper Guide.
Figure 4-71. Disconnecting Cable
8. Remove the screw (x1) and remove LD Shaft Holder Assy.
Upper Paper Guide
Tabs
Figure 4-74. Removing Upper Paper Guide
Tabs
C.B.S 3X6 (Torque: 6±1Kgf.cm)
Figure 4-72. Removing LD Shaft Holder Assy
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 88
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
11. Remove the PE Detector Lever and Torsion Spring, 0.222.
PE Detector Lever
Torsion Spring, 0.222
Figure 4-75. Removing PE Detector and Torsion Spring, 0.222
When installing the Extension Springs, follow the steps below.
1. Attach one end of the Extension Spring to the guide pin of the
Upper Paper Guide.
2. Attach the other end of the Extension Spring to the hook of
the Main Frame with the longnose pliers.
When securing the Main Frame to the Frame Base with
screws, be sure to perform the tightening in the order of the
numbers indicated in Figure 4-69 (p.87).
When installing the Shield Plate L, be cautious not to damage
the Spur Gears of the PF Roller and the EJ Roller.
Install the Grounding Spring attaching the ends to the parts as
shown in the figure below.
Notch (Main Frame)
Grounding Spring
Shaft (PF Roller)
Extension Spring
Hook
A D J U S T M E N T
R E Q U I R E D
After replacing the Waste Ink Pads, perform the following
adjustment (T.B.D.).
Figure 4-77. Installing Grounding Spring
(Refer to Chapter 5 “ ADJUSTMENT (p100)”)
1. “Waste Ink Pad Counter” (only after replacement)
2. “Ink Charge”
Guide Pin
3. “TOP Margin Adjustment”
4. “Head Angular Adjustment”
5. “Bi-D Adjustment”
6. “PF Band Adjustment”
Figure 4-76. Installing Extension Springs
When the Main Frame is reassembled, perform the required
lubrication.
(Refer to Chapter 6 “ MAINTENANCE (p108)”)
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 89
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.10 LD Roller/ASF Unit
Part/Unit that should be removed before removing LD Roller/ASF Unit
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism / Hopper / Main Board / Main Frame / EJ Frame
Assy. / Print Head / CR Scale / CR Motor / CR Unit / Timing Belt / Ink System
Removal procedure
Preparation for LD Roller Removal
1. Rotate the LD Roller until the flat part faces upwards.
2. Insert a tweezer or a screwdriver into the slot as shown in the figure to hold
the Paper Back Lever outwards.
3. Move the Carriage Lock Lever outwards.
LD Roller
Tweezer
Paper Back Lever
Carriage
Lock Lever
LD Roller Removal
C A U T I O N
Be cautious of the following points.
Do not touch the LD Roller with bare hands.
Do not touch the roller of ASF Unit with bare hands.
4. Release the tabs (x2) of the LD Roller shaft from the bearing, and loosen the
shaft.
Tabs
LD Roller
Figure 4-79. Removing LD Roller (1)
5. Pull out the LD Roller shaft from the frame of the ASF Unit and remove the
LD Roller.
Frame of ASF Unit
Flat part
Figure 4-78. Preparation (1)
Carriage
Lock Lever
LD Roller
Figure 4-80. Removing LD Roller (2)
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
ASF Unit Removal
1. Remove the screw (x1) from the side of the Frame Base.
2. Remove the screws (x2), and remove the ASF Unit taking care not to scratch
it with the positioning tab.
Assemble the LD Roller as shown below.
LD Roller Shaft
Guide pin
Positioning hole
C.B.P 3X8 (Torque: 6±1Kgf.cm)
ASF Unit
ASF Unit
Frame Base
LD Roller
Tabs
Extension
Spring 0.143
Clutch
Spur Gear 36.8
Figure 4-82. Assembling LD Roller (1)
1. Match the guide pin of the LD Roller Shaft with the positioning
hole of the Clutch.
2. Attach the tips of the Extension Spring 0.143 to the tab of the LD
Roller shaft and the tab of the Clutch.
3. Attach the cam side of the Spur Gear 36.8 to the hole of the Clutch.
LD Roller
Clutch
Positioning Tab
Figure 4-81. Removing ASF Unit
A D J U S T M E N T
R E Q U I R E D
When the LD Roller is reassembled, perform the required
lubrication. (Refer to Chapter 6 “ MAINTENANCE (p108)”)
Figure 4-83. Assembling LD Roller (2)
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 91
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.11 Waste Ink Pads
Part/Unit that should be removed before removing Waste Ink Pads
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism / Hopper / Main Board / Main Frame / EJ Frame
Assy. / Print Head / CR Scale / CR Motor / CR Unit / Timing Belt / Ink System /
EJ Frame Assy. / EJ Roller / LD Roller / ASF Unit
Removal procedure
1. Remove the Waste Ink Pads (x8) from the sections indicated with to
of the Frame Base.
Figure 4-84. Removing Waste Ink Pads
When installing the Waste Ink Pads on the section , be sure
to lay the six parts one on top of another in the order shown in
the figure.
Figure 4-85. Installing Waste Ink Pads (1)
When installing the Waste Ink Pads on the section (B), make
sure to insert the tips of induction paper between the
and
pads.
C A U T I O N
When removing the Waste Ink Pads, be careful not to tear the tip
of the induction paper. If it is torn, replace the induction paper.
Tips of induction paper
Figure 4-86. Installing Waste Ink Pads (2)
When installing the Waste Ink Pads, be sure to insert ribs and
tabs of the Frame Base into the slots and notches of the pads.
When installing in the section (refer to Figure 4-84), be
sure to match the positioning tabs and press
until it clicks
to secure it in the right position.
A D J U S T M E N T
R E Q U I R E D
After replacing the Waste Ink Pads, perform the following
adjustment (TBD). (Refer to Chapter 5 “ ADJUSTMENT (p100)”)
1. “Waste Ink Pad Counter” (only after replacement)
2. “Ink Charge”
3. “TOP Margin Adjustment”
4. “Head Angular Adjustment”
5. “Bi-D Adjustment”
6. “PF Band Adjustment”
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 92
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.12 PF Roller
C A U T I O N
Part/Unit that should be removed before removing PF Roller
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism / Hopper / Main Board / Main Frame / EJ Frame
Assy. / Print Head / CR Scale / CR Motor / CR Unit / Timing Belt / Ink System
Removal procedure
1. Remove the FB Cover.
Do not touch or damage the coated area of the PF Roller Assy.,
when performing the following work.
When installing the Spur Gear, 13.5, be sure to install a new
one. The Spur Gear 13.5 cannot be reused.
FB Cover
Figure 4-87. Removing PF Roller (1)
2. Remove the Spur Gear, 13.5 from the PF Roller with a flathead screw driver
or the like.
Spur Gear, 13.5
PF Roller Assy.
Figure 4-89. Removing PF Roller (2)
3. <Pull open the bearing slightly (Arrow ), and remove the PF Roller Assy
(Arrow
).
PF Roller Assy.
C A U T I O N
When removing (prying) the Spur Gear, 13.5 with a flathead screw
driver or the like, do not use the fragile upper half of the bearing as
a pivot point, but use the firmer lower half instead.
Upper half of the Bearing
Spur Gear, 13.5
Lower half of the Bearing
A D J U S T M E N T
R E Q U I R E D
Bearing
Figure 4-90. Removing PF Roller (3)
When the PF Roller is reassembled, perform the required
lubrication. (Refer to Chapter 6 “ MAINTENANCE (p108)”)
Figure 4-88. Removing Spur Gear, 13.5
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.6.13 PF Motor
Part/Unit that should be removed before removing PF Motor
Document Cover / ASF Cover / Support Arm / Scanner Unit / Middle Case /
Panel Unit / Printer Mechanism / Hopper / Main Board / Main Frame / EJ Frame
Assy. / Print Head / CR Scale / CR Motor / CR Unit / Timing Belt / Ink System /
PF Roller
Removal procedure
1. Detach the ferrite core from the Frame Base.
Frame Base
Ferrite Core
Figure 4-91. Removing PF Motor (1)
When installing the PF Motor, arrange the cable into the slit and
the hook, then place the ferrite core into the positioning hole.
Positioning hole
Ferrite Core
Slit
Hook
Figure 4-93. Installing the PF Motor
2. Remove the screws (x3), and remove the PF Motor.
C.B.S 3X8 (Torque: 6±1Kgf.cm)
PF Motor
Figure 4-92. Removing PF Motor (2)
DISASSEMBLY/ASSEMBLY Disassembling Printer Mechanism 94
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.7 The Shortest Way to Remove the Main Frame.
If the parts to repair is only the parts after the Main Frame is removed, there’s another
way to remove the Main Frame together with other parts. (See the following list of
“Target Parts of this removal” or the parts marked with “*” in “Figure 4-2.
Disassembling Flowchart (p64)”)
Main Frame with other parts
Parts removed together
Main Board
CR Unit
Printhead
CR Scale
Head FFC
PE Sensor
Paper Guide Upper
Target Parts of this removal
LD Roller
ASF Unit
Ink System
Waste Ink Pad
PF Roller
PF Motor
Figure 4-94. Removing Main Frame with Other Parts
Removal procedure
1. Remove the “Document Cover/ASF Cover/Support Arm (p66)”.
2. Remove the “Scanner Unit/Middle Case/Panel Unit (p67)”.
3. Remove the “Hopper (p78)”.
4. Disconnect the connector cables of P/S ASSY and PF Motor from J1, J8 of
the Main Board. (See “Main Board (p73)”)
5. Remove the “CR Motor (p80)”.
6.
Remove the screw from the Shield Plate L. (The plate is not to be removed. See
Step1 in
“Main Frame (p87)”
.)
7. Follow the same steps from Step 2 in “Main Frame (p87)” to Step 6.
8. Remove the Main Frame together with other parts.
C A U T I O N
After removing the Main Frame, treat and place the Main
Frame with great care while following the next instructions.
Place the Main Frame with
the back side facing down
as shown in the figure.
Main Frame with other parts
Figure 4-95. How to place the Main Frame
• Be careful not to deform the Main Frame.
• Do not touch or damage the nozzles or the ink supply needles
of the Printhead when placing the Main Frame.
• Be careful not to stick the grease around the area, especially
not to allow the grease to come in contact with the Timing
Belt, which can result in malfunction of the printer.
• Be careful not to lose the rollers of Paper Guide Upper, and do
not touch the rollers with bare hands.
When reassembling the Main Frame, basically follow the
removal steps backward. But in some points listed below, be
sure to refer to the reassembly instructions.
• Be careful not to bend or damage the Shield Plate L when
placing the Main Frame on the Frame Base in Step 5.
• Be careful not to damage the Carriage Lock Lever when
placing the Main Frame on the Frame Base in Step 5. (See LD
Roller/ASF Unit “Preparation (1) (p90)”)
• See “Installing Extension Springs (p89)” and “Installing
Grounding Spring (p89)” in Step 5
A D J U S T M E N T
R E Q U I R E D
After removing the Main Frame in this removal, perform the
required adjustment (T.B.D.). (Refer to Chapter 5 “
ADJUSTMENT (p100)”)
When the Main Frame is reassembled, perform the required
lubrication. (Refer to Chapter 6 “ MAINTENANCE (p108)”)
DISASSEMBLY/ASSEMBLY The Shortest Way to Remove the Main Frame. 95
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.8 Scanner Section
4.8.1 Upper Scanner Housing
Part/Unit that should be removed before removing Upper Scanner Housing
Document Cover / ASF Cover / Support Arm / Scanner Unit
Removal Procedure
C A U T I O N
1. Remove the screws (x2) that secure the Upper Scanner Housing.
2. Release the tabs (x7) that secure the Upper Scanner Housing, and remove the
Bottom side of the Scanner Unit
Following work should be performed in a room where there is
a little dust. A clean room or a clean bench would be
preferable.
Do not damage the document glass on the Upper Scanner
Housing.
Upper Scanner Housing.
Upper Scanner Housing,
(underneath)
A D J U S T M E N T
R E Q U I R E D
When the Upper Scanner Housing is reassembled, perform the
required lubrication. (Refer to Chapter 6 “ MAINTENANCE
(p108)”)
C.B.P. 3x10 F/Zn
Tab
(4±0.5kgfcm)
Figure 4-96. Removing Upper Scanner Housing
Match the notch of the Upper Scanner Housing with the tab (x1,
) of the Lower Scanner Housing.
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.8.2 CIS Assy./CIS Carrier Assy./Scanner FFC
Part/Unit that should be removed before removing Scanner CIS Assy./CIS
Carrier Assy./Scanner FFC
Document Cover / ASF Cover / Support Arm / Scanner Unit / Upper Scanner
Housing
Removal procedure
C A U T I O N
1. Remove the CIS Assy. from the CIS Carrier Assy.
2. Disconnect the Scanner FFC from the CIS Assy., and remove the CIS Assy.
Do not scratch the Rod Lens Array when removing the CIS Assy.
CIS Assy.
Rod Lens Array
CIS Carrier Assy.
3. Remove the CIS Carrier Assy. from the Timing Belt and the Guide Rail of the
Lower Scanner Housing.
CIS Carrier Assy.
Guide Rail of the
Lower Scanner
Housing
Scanner Timing Belt
Figure 4-98. Removing CIS Carrier Assy.
C A U T I O N
Do not damage the Scanner FFC as it is secured with double-sided
tape.
4. Shift the Ferrite Core in the direction of the arrow to release it from the tabs
(x2), and remove the Scanner FFC from the Lower Scanner Housing.
Groove on the Lower
Scanner Housing
Scanner FFC
FFC route
Tab
Figure 4-97. Removing CIS Assy.
CIS Assy.
Connector
Scanner FFC
Tape Position
Ferrite Core Tab
Figure 4-99. Removing Scanner FFC
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
When installing the Scanner FFC to the Lower Scanner
Housing, secure it and the ferrite core with double-sided tapes
at the specified positions. (refer to Figure 4-99)
When installing the CIS Carrier Assy., put the Scanner
Timing Belt through the slit of the CIS Carrier Assy. (refer to
Figure 4-98)
When installing the CIS Assy. to the CIS Carrier Assy.,
connect the Scanner FFC and route the FFC under the tab of
the CIS Assy. (refer to Figure 4-97)
When installing the CIS Assy. to the CIS Carrier Assy., match
the tab and the notch as shown below.
CIS Assy.
Tab
Notch
CIS Carrier Assy.
Figure 4-100. Installing CIS Assy. to CIS Carrier Assy.
A D J U S T M E N T
R E Q U I R E D
When the CIS Carrier Assy. is reassembled, perform the required
lubrication to the Guide Rail of the Lower Scanner Housing.
(Refer to Chapter 6 “ MAINTENANCE (p108)”)
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EPSON Stylus CX4300/CX4400/CX5500/CX5600/DX4400/DX4450 Revision A
4.8.3 Scanner Motor Unit/Driven Pulley
Part/Unit that should be removed before removing Scanner Motor Unit/
Driven Holder
Document Cover / ASF Cover / Support Arm / Scanner Unit / Upper Scanner
Housing
Removal procedure
1. Move the CIS Carrier Assy. to the center of the scanner.
2. Remove the polyslider washer from the Driven Pulley.
3. Push the Driven Pulley in the direction of the arrow to release the Timing
Belt, and remove the Driven Pulley.
4. Remove the Scanner Timing Belt from the Pulley.
CIS Carrier Assy.
Pulley
Timing Belt
5. Release the Scanner Motor cable from the tabs (x6) of the Lower Scanner
Housing.
6. Remove the screws (x3) that secure the Scanner Motor Unit, and remove the
Scanner Motor Unit.
Scanner
Motor Unit
Scanner Motor Connector Cable
C.B.P. 3x8 F/Zn (4.0±0.5kgfcm)
Tab
Figure 4-102. Removing Scanner Motor Unit
Route the Scanner Motor Connector Cable as shown in the
figure. (refer to Figure 4-102)
Insert the Driven Pulley Spring into the rib of the Driven
Pulley. (refer to Figure 4-101)
When installing the Scanner Timing Belt, make sure to face its
jagged side inward.
A D J U S T M E N T
R E Q U I R E D
When the Scanner Motor Unit/Driven Pulley is reassembled,
perform the required lubrication. (Refer to Chapter 6 “
MAINTENANCE (p108)”)
Driven Pulley
Rib
Driven Pulley Spring
Polyslider
Washer
Figure 4-101. Removing Driven Pulley
DISASSEMBLY/ASSEMBLY Scanner Section 99
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ADJUSTMENT
CHAPTER
5
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