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SERVICE MANUAL
Color Inkjet Printer
Stylus C40UX/C40SX/C20UX/C20SX
®
SEIJ01002
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, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.
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 contents of this manual are subject to change without notice.
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 |
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respective owners. EPSON disclaims any and all rights in those marks. |
Copyright © 2001 SEIKO EPSON CORPORATION.
Imaging & Information Product Division
TPCS Quality Assurance Department
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PRECAUTIONS |
Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment. |
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DANGER |
Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing |
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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 INJURIER 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 VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
3.ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4.IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5.DO NOT REPLACE IMPERFECTLY FUNCTIONING COMPONENTS WITH COMPONENTS WHICH ARE NOT MANUFACTURED BY EPSON. IF SECOND SOURCE IC OR OTHER COMPONENTS WHICH HAVE NOT BEEN APPROVED ARE USED, THEY COULD CAUSE DAMAGE TO THE EPSON PRODUCT, OR COULD VOID THE WARRANTY OFFERED BY EPSON.
About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
Manual Configuration |
Symbols Used in this Manual |
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 lists of Epson-approved lubricants and adhesives required for servicing the product.
APPENDIX Provides the following additional information for reference:
•Connector pin assignments
•Electric circuit boards components layout
•Electrical circuit boards schematics
•Exploded diagram & Parts List
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, or WARNING messages.
Indicates an operating or maintenance procedure, practice
ADJUSTMENT |
or condition that is necessary to keep the product’s quality. |
REQUIRED |
CAUTION
Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in damage to, or destruction of, equipment.
CHECK
May indicate an operating or maintenance procedure,
POINT 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.
I.ndicates an operating or maintenance procedure, practice or WARNING condition that, if not strictly observed, could result in injury or
loss of life.
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 |
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Revision |
Issued Date |
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Description |
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A |
May 31. 2001 |
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First Release |
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Chapter 2 |
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• Page 38 : Ink consumption of Initial charge was revised. |
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Chapter 4 |
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• Page 58 : Warning message was deleted. |
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• Page 61 : Caution message regarding disassembly and assembly was added. |
B |
July 10. 2001 |
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• Page 63 : Adjustment Requested message for Top Margin adjustment was added. |
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• Page 65 : Reassembly message for inserting PS cable was revised. |
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• Page 68~70 : Disassembly procedure for Paper Guide Upper/Left was added. |
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• Page 76 : Adjustment Requested message for Top Margin adjustment was added. |
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Chapter 5 |
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• Page 88,89 : Adjustment procedure for Top Margin was revised. |
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CONTENTS
Chapter 1 PRODUCT DESCRIPTION |
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1.1 FEATURES ......................................................................................................... |
9 |
1.2 Differences between the Stylus C20 and the Stylus C40 ................................. |
9 |
1.3 SECIFICATIONS ............................................................................................. |
10 |
1.3.1 Physical Specification ................................................................................ |
10 |
1.3.2 Printing Specification ................................................................................ |
10 |
1.3.3 Paper Feeding ............................................................................................ |
11 |
1.3.4 Input Data Buffer ....................................................................................... |
11 |
1.3.5 Electrical specification ............................................................................... |
11 |
1.3.6 Envirormental Condition ........................................................................... |
12 |
1.3.7 Reliability .................................................................................................. |
12 |
1.3.8 Safety Approvals ....................................................................................... |
12 |
1.3.9 Acoustic Noise ........................................................................................... |
12 |
1.3.10 CE Marking ............................................................................................. |
12 |
1.4 INTERFACE ..................................................................................................... |
13 |
1.4.1 USB Interface ............................................................................................ |
13 |
1.4.2 Parallel Interface (Forward Channel) ........................................................ |
13 |
1.4.3 Parallel Interface (Reverse Channel) ......................................................... |
15 |
1.4.4 Prevention Hosts from Data Transfer Time-out ........................................ |
16 |
1.4.5 IEEE1284.4 Protocol ................................................................................. |
17 |
1.5 OPERATOR CONTROLS .............................................................................. |
18 |
1.5.1 Operate Switch ........................................................................................... |
18 |
1.5.2 Control Panel ............................................................................................. |
18 |
1.5.3 Panel Functions .......................................................................................... |
18 |
1.5.4 Printer Condition and Panel Status ............................................................ |
18 |
1.5.5 Printer Initialization ................................................................................... |
19 |
1.5.6 Errors ......................................................................................................... |
19 |
1.6 PAPER ............................................................................................................... |
20 |
1.6.1 Paper Handling .......................................................................................... |
20 |
1.6.2 Paper Specification .................................................................................... |
20 |
1.6.3 Printing Area .............................................................................................. |
21 |
1.7 INK CARTRIDGE ........................................................................................... |
23 |
1.7.1 Black Ink Cartridge ................................................................................... |
23 |
1.7.2 Color Ink Cartridge .................................................................................... |
23 |
Chapter 2 Operating Principles |
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2.1 Overview ............................................................................................................ |
25 |
2.1.1 Printer Mechanism ..................................................................................... |
25 |
2.1.2 Printhead .................................................................................................... |
26 |
2.1.2.1 Printing Process ................................................................................. |
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2.1.2.2 Printing Method ................................................................................. |
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2.1.3 Carriage Mechanism .................................................................................. |
28 |
2.1.4 Paper Feeding Mechanism ......................................................................... |
30 |
2.1.5 Paper Loading Mechanism (ASF Unit) ..................................................... |
31 |
2.1.6 Ink System Mechanism ............................................................................. |
35 |
2.1.6.1 Pump Unit & Wiper mechanism ....................................................... |
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2.1.6.2 Capping Mechanism .......................................................................... |
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2.1.7 Ink Sequence .............................................................................................. |
38 |
2.1.8 Printing mode ............................................................................................ |
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2.2 Electrical Circuit Operating Principles .......................................................... |
41 |
2.2.1 C417 PSB/PSE board ................................................................................ |
41 |
2.2.2 C413 MAIN/B Board ................................................................................ |
43 |
2.2.2.1 Main elements ................................................................................... |
43 |
Chapter 3 Troubleshooting |
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3.1 Overview ............................................................................................................ |
45 |
3.2 Troubleshooting with LED Error Indications ............................................... |
46 |
Chapter 4 Disassembly and Assembly |
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4.1 Overview ............................................................................................................ |
57 |
4.1.1 Precautions ................................................................................................. |
57 |
4.1.2 Tools .......................................................................................................... |
59 |
4.1.3 Screws ........................................................................................................ |
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4.1.4 Work Completion Check ........................................................................... |
60 |
4.2 Disassembly ....................................................................................................... |
61 |
4.2.1 Upper housing removal .............................................................................. |
61 |
4.2.2 ASF unit removal ....................................................................................... |
63 |
4.2.3 Waste ink pad removal .............................................................................. |
64 |
4.2.4 PS unit removal .......................................................................................... |
65 |
4.2.5 Paper eject roller removal .......................................................................... |
66 |
4.2.6 Paper Guide Upper/Left removal ............................................................... |
68 |
4.2.7 MAIN board removal ................................................................................ |
71 |
4.2.8 CR motor removal ..................................................................................... |
73 |
4.2.9 Printhead unit removal ............................................................................... |
74 |
4.2.10 LD unit removal ....................................................................................... |
76 |
4.2.11 Printer mechanism removal ..................................................................... |
77 |
Chapter 5 Adjustment |
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5.1 Overview ............................................................................................................ |
79 |
5.1.1 Required Adjustment ................................................................................. |
79 |
5.1.2 Adjustment Program Initial Setting menu ................................................. |
80 |
5.1.3 Adjustment Program feature ...................................................................... |
81 |
5.1.4 EEPROM initial setting ............................................................................. |
83 |
5.1.5 Head ID ...................................................................................................... |
83 |
5.1.6 Bi-D ........................................................................................................... |
85 |
5.1.7 USB ID ...................................................................................................... |
86 |
5.1.8 Top margin ................................................................................................. |
88 |
5.1.9 Head cleaning ............................................................................................ |
89 |
5.1.10 Initial ink charge ...................................................................................... |
90 |
5.1.11 Refurbishment for DOA .......................................................................... |
90 |
5.1.12 Protection counter check .......................................................................... |
92 |
5.1.13 EEPRON check ....................................................................................... |
94 |
5.1.14 EEPROM back up data ............................................................................ |
95 |
5.1.15 A4 pattern will print ................................................................................. |
96 |
Chapter 6 Maintenance |
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6.1.3 Lubrication ............................................................................................... |
100 |
Chapter 7 Appendix |
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7.1 Connector Summary ...................................................................................... |
104 |
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7.1.1 Major Component Unit ............................................................................ |
104 |
7.2 EEPROM Address Map ................................................................................ |
106 |
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7.3 Component Layout ......................................................................................... |
110 |
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7.4 |
Parts List ......................................................................................................... |
112 |
7.5 |
Exploded Diagram .......................................................................................... |
113 |
7.6 |
Electrical Circuits ........................................................................................... |
119 |
6.1 Overview ............................................................................................................ |
99 |
6.1.1 Cleaning ..................................................................................................... |
99 |
6.1.2 Service Maintenance ................................................................................ |
100 |
C H A P T E R
1
PRODUCT DESCRIPTION
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.1 FEATURES
High color print quality
-1440 (H) x 720 (V) dpi printing
-4 color printing (YMCK)
-Traditional and New Microweave
Built-in auto sheet feeder
-Holds 100 cut-sheets (65 g/m²)
-Holds 10 envelopes
-Holds 10 transparency films
Built-in 1 I/F
Interface specification for each model are as the following. Parallel Interface .EPSON Stylus C40SX .EPSON Stylus C20SX USB Interface .EPSON Stylus C40UX .EPSON Stylus C20UX
Windows / Macintosh exclusive
1.2 Differences between the Stylus C20 and the Stylus C40
The Stylus C20 and Stylus C40 are mechanically the same, but the throughput of the Stylus C40 is slightly higher than that of the Stylus C20. (Refer to Table 1-1.)
Table 1-1. Throughput
Models |
memo economy |
Normal |
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Stylus C20 |
6.5 PPM |
3.0 PPM |
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Stylus C40 |
8.0 PPM |
3.5 PPM |
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In both models, demarcation is determined by the EEPROM value 29 <H>. When the value of bit 0 is 1, a wait of 40
msec is inserted for each CR pass during printing, then the next operation starts.
Table 1-2. Delay of oparation
EEPROM 29 <H> bit 0 value |
Model |
Delay time during printing |
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0 |
Stylus C40 |
None |
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1 |
Stylus C20 |
CR 40 msec for each pass. |
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PRODUCT DESCRIPTION |
FEATURES |
9 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.3 SECIFICATIONS
This section covers specifications of the printer.
1.3.1 Physical Specification
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Weight |
: 2.48kg (without the ink cartridges) |
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Dimension |
: 424 mm(W) x 227 mm (D) x 168 mm (H) (Printing) |
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Figure 1-1. Stylus C40/C20 Dimensions
1.3.2 Printing Specification
Print method |
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: On demand ink jet |
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Nozzle Configuration |
: monochrome 48 nozzles |
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: color 15 nozzles x 3 (Cyan, Magenta, Yellow) |
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Print direction |
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: Bi-direction with logic seeking |
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Print speed & Printable columns |
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Character mode : Black only |
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Character Pitch |
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Character Quality Printable Columns |
CR Speed |
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10CPI |
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LQ |
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80 Columns |
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20IPS |
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Raster graphics mode |
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Horizontal |
Printable area |
Available dot |
CR Speed |
Notes |
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resolution |
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480 dpi |
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8.26 inch |
3968 |
14.1 IPS |
Black mode |
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360 dpi |
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8.26 inch |
2976 |
23.8 IPS |
- |
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720 dpi |
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8.26 inch |
5952 |
20 IPS |
- |
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1440 dpi |
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8.26 inch |
11904 |
20 IPS |
- |
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Control code* |
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: ESC/P R4C7050 exclusive |
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: EPSON Remote command |
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Character tables* |
: none |
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ASCII 20h to 7Fh code support. |
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Typeface* |
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Bit map LQ font |
:EPSON Courier 10 CPI |
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International character sets * : None |
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* Do not mention to the user’s manual about control code, character table, typeface and International character sets.
PRODUCT DESCRIPTION |
SECIFICATIONS |
10 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.3.3 Paper Feeding
Feeding method |
: Friction feed with ASF |
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Paper path |
: Cut-sheet ASF (Top entry) |
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Feed speed |
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Feed condition |
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Time |
Speed |
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10.16mm(0.4 inch) feed |
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110msec |
92.36mm (3.64inch)/sec |
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Continuous feed |
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140msec |
139.7mm (5.5inch)/sec |
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1.3.4 Input Data Buffer
Buffer size :12 Kbytes
1.3.5 Electrical specification
120 V version |
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Rated voltage |
: AC 120 V |
Input voltage range |
: AC 99 - 132 V |
Rated frequency range |
: 50 - 60 Hz |
Input frequency range |
: 49.5 - 60.5 Hz |
Rated current |
: 0.4A |
Power consumption |
: Approx. 16W (ISO/IEC 10561 Letter pattern |
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: Approx. 4W in standby mode |
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: Energy Star compliant |
Insulation Resistance |
:10 M ohms min. |
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(between AC line and chassis, DC 500 V) |
Dielectric strength |
: AC 1000 V rms. 1 minute or |
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AC 1200 V rms. 1 second |
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(between AC line and chassis) |
220-240 V version |
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Rated voltage |
: AC 220 - 240 V |
Input voltage range |
: AC 198 - 264 V |
Rated frequency range |
: 50 - 60 Hz |
Input frequency range |
: 49.5 - 60.5 Hz |
Rated current |
: 0.2A |
Power consumption |
: Approx. 16W (ISO/IEC 10561 Letter pattern |
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: Approx. 4W in standby mode |
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: Energy Star compliant |
Insulation Resistance |
:10 M ohms min. |
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(between AC line and chassis, DC 500 V) |
Dielectric strength |
: AC 1500 V rms. 1 minute |
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(between AC line and chassis) |
PRODUCT DESCRIPTION |
SECIFICATIONS |
11 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.3.6 Envirormental Condition
Temperature |
: 10 to 35 ºC (operating *3 ) |
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: -20 to 60 ºC(non-operating, *1) |
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1 month at 40 ºC |
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120 hours at 60 ºC |
Humidity |
: 20 to 80% RH (operating, *2,*3) |
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: 5 to 85% RH (non-operating, *1, *2) |
Resistance to shock |
: 1 G, within 1 ms (operating) |
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: 2 G, within 2 ms (non-operating, *1) |
Resistance to vibration |
: 0.15G (operating) |
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: 0.50G (non-operating, *1) |
*1: with shipment container *2: without condensation
*3: Condition is as following figure.
Figure 1-2. Environmental Condition
1.3.7 Reliability
Total print volume |
: 10,000 pages (A4, Letter) or |
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20,000 pages (A4, Letter) |
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*refer to “EEPROM Address Map” on page -106 |
Print Head Life |
: 4000 million dots/nozzle |
1.3.8 Safety Approvals
120 V version :
Safety standards : UL1950 with D3
CSA C22.2 No.950 with D3
EMI : FCC part15 subpart B class B
CSA C108.8 class B
220-240 V version :
Safety standards : EN 60950(VDE)
EMI : EN 55022(CISPR Pub.22) class B
:AS/NZS 3548 class B
1.3.9Acoustic Noise
Level |
: Approx. 45 dB(A) (According to ISO 7779) |
1.3.10 CE Marking
220-240 V version
Low Voltage Directive 73/23/EEC : EN60950
EMC Directive 89/336/EEC : EN55022 Class B
EN61000-3-2
EN61000-3-3
EN50082-1
IEC801-2
IEC801-3
IEC801-4
PRODUCT DESCRIPTION |
SECIFICATIONS |
12 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.4 INTERFACE
Interface specification for each model are as the following. Parallel Interface :EPSON Stylus C40SX .EPSON Stylus C20SX USB Interface :EPSON Stylus C40UX .EPSON Stylus C20UX
*This printer interface as standard.
1.4.1 USB Interface
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Standard |
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: based on |
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“Universal Serial Bus Specifications Revision 1.1” |
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“Universal Serial Bus Device Class Definition for Printing Devices Version |
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1.1” |
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Bit rate |
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: 12Mbps (Full Speed Device) |
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Data encording |
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: NRZI |
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Adaptable connector |
: USB Series B |
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Recommended cable length |
: 2 meters |
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Connect er pin assinment and signals: |
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Pin No. |
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Signal name |
In/Out |
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Function description |
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1 |
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VCC |
- |
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Cable power. Maximum power consumption is |
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100mA |
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2 |
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Data |
bi-directional |
Data |
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3 |
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+Data |
bi-directiona |
data, pull up to +3.3V via 1.5K ohm resistor |
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4 |
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Ground |
- |
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Cable ground |
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Figure 1-3. USB Pin Assignment
1.4.2 Parallel Interface (Forward Channel)
Transmission mode |
: 8 bit parallel, IEEE-1284 compatibility mode |
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Synchronization |
: By STROBE pulse |
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Handshaking |
: By BUSY and ACKNLG signal |
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Signal level |
: TTL compatible level |
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Adaptable connector |
: 57-30360(amphenol) or equivalent |
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BUSY signal is set high before setting either -ERROR |
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low or PE high and held high until all these signals |
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return to their inactive state. |
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BUSY signal is at high level in the following cases. |
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-During data entry (see Data transmission timing) |
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-When input data buffer is full |
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-During -INIT signal is at low level or during |
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hardware initialization |
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-During printer error (See -ERROR signal) |
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ERROR signal is at low level when the printer is in one |
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of the following states. |
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-Printer hardware error (fatal error) |
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-Paper-out error |
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-Paper-jam error |
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-Ink-out error |
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-Ink overflow error |
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PE signal is at high level during paper-out error. |
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Data transmission timing : |
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DATA |
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-STROBE |
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BUSY |
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-ACKNLG |
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PRODUCT DESCRIPTION |
INTERFACE |
13 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
Parameter |
Minimum |
Maximum |
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Parameter |
Minimum |
Maximum |
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tsetup |
500 ns |
- |
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treply |
0 |
- |
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thold |
500 ns |
- |
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tack |
500 ns |
10 us |
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tstb |
500 ns |
- |
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tnbusy |
0 |
- |
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tready |
0 |
- |
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tnext |
0 |
- |
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tbusy |
- |
500 ns |
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tt-out* |
- |
120 ns |
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* Rise and fall time of every output signals |
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tt-in** |
- |
200 ns |
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** Rise and fall time of every input signals |
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***Typical time of tack is shown below. |
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Parallel I/F mode |
typical time of tack |
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High speed |
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2us |
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Normal speed |
4usror |
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Signal level : TTL compatible (IEEE-1284 level 1 device)
Parameter |
Minimum |
Maximum |
Condition |
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VOH* |
- |
5.5 V |
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is. |
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VOL* |
-0.5 V |
- |
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IOH* |
- |
0.32 mA |
VOH = 2.4 V |
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IOL* |
- |
12 mA |
VOL = 0.4 V |
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CO |
- |
50 pF |
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VIH |
- |
2.0 V |
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VIL |
0.8V |
- |
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IIH |
- |
0.32 mA |
VIH = 2.0 V |
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IIL |
- |
12 mA |
VIL = 0.8 V |
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CI |
- |
50 pF |
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* A low logic level on the Logic H signal is.
2.0 V or less when the printer is powered off and this signal is equal or exceeding 3.0V when the printer is powered on.
The receiver shall provide an impedance equivalent to 7.5 K ohm to ground
Connector pin assignment and signals :
Pin No. |
Signal Name |
GND pin |
In/Out |
Functional description |
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Return |
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1 |
-STROBE |
19 |
In |
The strobe pulse. Read-in of data is |
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performed at the falling edge of this pulse. |
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2 |
DATA0 |
20 |
In |
The DATA0 through DATA7 signals |
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represent data bits 0 to 7, respectively. |
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3 |
DATA1 |
21 |
In |
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Each signal is at high level when data is |
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4 |
DATA2 |
22 |
In |
logical 1 and low level when data is logical 0. |
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5 |
DATA3 |
23 |
In |
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6 |
DATA4 |
24 |
In |
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7 |
DATA5 |
25 |
In |
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8 |
DATA6 |
26 |
In |
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9 |
DATA7 |
27 |
In |
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10 |
-ACKNLG |
28 |
Out |
This signal is a negative pulse indicating that |
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the printer can again accept data. |
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11 |
BUSY |
29 |
Out |
A high signal indicates that the printer cannot |
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receive data. |
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12 |
PE |
28 |
Out |
A high signal indicates paper-out error. |
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13 |
SLCT |
28 |
Out |
Always at high level when the printer is |
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powered on. |
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14 |
-AFXT |
30 |
In |
Not used. |
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The falling edge of a negative pulse or a low |
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31 |
-INIT |
30 |
In |
signal on this line causes the printer to |
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initialize. Minimum 50 us pulse is necessary. |
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32 |
-ERROR |
29 |
Out |
A low signal indicates printer error condition. |
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36 |
-SLIN |
30 |
In |
Not used. |
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18 |
Logic H |
- |
Out |
Pulled up to +5 V via 3.9 K ohm resistor. |
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35 |
+5V |
- |
Out |
Pulled up to +5 V via 3.3 K ohm resistor. |
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PRODUCT DESCRIPTION |
INTERFACE |
14 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
Pin No. |
Signal Name |
GND pin |
In/Out |
Functional description |
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Return |
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17 |
Chassis GND |
- |
- |
Chassis GND. |
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16, 33 |
GND |
- |
- |
Signal GND. |
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19-30 |
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15, 34 |
NC |
- |
- |
Not connected. |
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*In/Out refers to the direction of signal flow from the printer's point of view.
1.4.3Parallel Interface (Reverse Channel)
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Transmission mode |
: IEEE-1284 nibble mode |
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Adaptable connector |
: See forward channel |
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Synchronization |
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: Refer to the IEEE-1284 specification |
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Handshaking |
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: Refer to the IEEE-1284 specification |
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Data trans. timing |
: Refer to the IEEE-1284 specification |
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Signal level |
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: IEEE-1284 level 1 device |
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See forward channel |
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Connector pin assignment and signals : |
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Pin No. |
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Signal Name |
ReturnG |
In/ |
Functional description |
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ND Pin |
Out* |
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1 |
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HostClk |
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19 |
In |
Host clock signal. |
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Pin No. |
Signal Name |
ReturnG |
In/ |
Functional description |
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ND Pin |
Out* |
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2 |
DATA0 |
20 |
In |
The DATA0 through DATA7 signals |
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represent data bits 0 to 7, respectively. |
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3 |
DATA1 |
21 |
In |
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Each signal is at high level when data is |
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4 |
DATA2 |
22 |
In |
logical 1 and low level when data is logical 0. |
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These signals are used to transfer the 1284 |
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5 |
DATA3 |
23 |
In |
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extensibility request values to the printer. |
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6 |
DATA4 |
24 |
In |
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7 |
DATA5 |
25 |
In |
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8 |
DATA6 |
26 |
In |
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9 |
DATA7 |
27 |
In |
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10 |
PtrClk |
28 |
Out |
Printer clock signal. |
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11 |
PtrBusy / |
29 |
Out |
Printer busy signal and reverse channel |
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DataBit-3,7 |
transfer data bit 3 or 7. |
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12 |
AckDataReq / |
28 |
Out |
Acknowledge data request signal and reverse |
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DataBit-2,6 |
channel transfer data bit 2 or 6. |
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13 |
Xflag / |
28 |
Out |
X-flag signal and reverse channel transfer |
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DataBit-1,5 |
data bit 1 or 5. |
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14 |
HostBusy |
30 |
In |
Host busy signal. |
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31 |
-INIT |
30 |
In |
Not used. |
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32 |
-DataAvail / |
29 |
Out |
Data available signal and reverse channel |
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DataBit-0,4 |
transfer data bit 0 or 4. |
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36 |
1284-Active |
30 |
In |
1284 active signal. |
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18 |
Logic-H |
- |
Out |
Pulled up to +5 V via 3.9 K ohm resistor. |
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35 |
+5V |
- |
Out |
Pulled up to +5 V via 3.3 K ohm resistor. |
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17 |
Chassis GND |
- |
- |
Chassis GND. |
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16, 33 |
GND |
- |
- |
Signal GND. |
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19-30 |
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15, 34 |
NC |
- |
- |
Not connected. |
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* In/Out refers to the direction of signal flow from the printer's point of view.
PRODUCT DESCRIPTION |
INTERFACE |
15 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
Extensibility Request :
The printer responds affirmatively when the extensibility request values are 00H or 04H, that mean,
00H : Request Nibble Mode Reverse Channel Transfer.
04H : Request Device ID;
Return Data Using Nibble Mode Rev Channel Transfer.
Device ID :
The printer sends following device ID string when it is requested.
When IEEE1284.4 is enabled, [00H] [4EH] MFG:EPSON;
CMD:ESCPL2,BDC,D4;
MDL:Stylus[SP]XXX;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]XXX; When IEEE1284.4 is disabled, [00H] [4BH]
MFG:EPSON;
CMD:ESCPL2,BDC;
MDL:Stylus[SP]XXX;
CLS:PRINTER;
DES:EPSON[SP]Stylus[SP]XXX;
*XXX is C20 or C40
Note |
: (1) [00H] denotes a hexadecimal value of zero. |
(2)MDL value depends on the EEPROM setting. Refer to Appendix F.
(3)CMD value depends on the IEEE1284.4 setting, Refer to Appendix F.
1.4.4Prevention Hosts from Data Transfer Time-out
Generally, hosts abandon data transfer to peripherals when a peripheral is in the busy state for dozens of seconds continuously. To prevent hosts from this kind of time-out, the printer receives data very slowly, several bytes per minute, even if the printer is in
busy state. This slowdown is started when the rest of the input buffer becomes several hundreds of bytes. Finally, the printer is in the busy state continuously when the input buffer is full.
PRODUCT DESCRIPTION |
INTERFACE |
16 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.4.5 IEEE1284.4 Protocol
The packet protocol described by IEEE1284.4 standard allows a device to carry on multiple exchanges or conversations which contain data and/or control information with another device at the same time across a single point-to-point link. The protocol is not, however, a device control language. It does provide basic transport-level flow control and multiplexing services. The multiplexed logical channels are independent of each other and blocking of one has no
effect on the others. The protocol operate over IEEE1284.
- Automatic selection
An initial state is compatible interface and starts IEEE1284.4 communication when magic strings (IEEE 1284.4 synchronous commands) are received.
- On
An initial state is IEEE1284.4 communication and data that received it by the time it is able to take synchronization by magic string (IEEE 1284.4 synchronous commands) is discarded.
- Off
An initial state is compatible interface and never starts IEEE1284.4 communication even if magic strings (IEEE 1284.4 synchronous commands) are received.
Factory setting is on.(Refer to Appendix H.EEPROM Map 09h)
PRODUCT DESCRIPTION |
INTERFACE |
17 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.5 OPERATOR CONTROLS
1.5.1 Operate Switch
Operate switch is located on the control panel.
1.5.2 Control Panel
Switches
There are 2 non-lock type push switches, and 2 LED.
Indicators
(1)Power (green)
Lights when the operate switch is "ON", and AC power is supplied.
(2)Error (red)
Lights or blinks when some error occurs to the printer.
1.5.3 Panel Functions
Panel Functions
SW |
Function |
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• Loads or Ejects the Paper(Pushing within 3seconds). |
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• Starts the Cleaning of head(Pushing for 3seconds) |
Error Reset SW |
• When carriage is on the Ink Cartridge change position, return |
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carriage from Ink Cartridge change position. |
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• Starts the Ink Cartridge change (Pushing for 6seconds) |
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*This function is not available in printing status.
Panel Function with Power on
SW |
Function |
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Error Reset SW |
Starts status printings |
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1.5.4 Printer Condition and Panel Status
Printer status |
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Indicators |
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Powe |
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Error |
Priority |
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Power ON condition |
On |
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- |
10 |
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Ink sequence |
Blink |
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- |
6 |
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Ink Cartridge change mode |
Blink |
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- |
5 |
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Data processing |
Blink |
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- |
9 |
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Paper Out *1 |
- |
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On |
4 |
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Paper jam condition*1 |
- |
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On 3 |
3 |
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Ink end(Black)*1 |
- |
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On->On |
8 |
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Ink level low(Black) |
- |
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Blink->Blink |
8 |
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Ink end(Color)*1 |
- |
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On->On |
8 |
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Ink level low(Color) |
- |
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Blink->Blink |
8 |
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Ink end (Black and Color) |
- |
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On->On |
8 |
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No Ink Cartridge (Black or Color)*1 |
- |
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On |
7 |
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Maintenance request |
Alt blink |
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Alt blink |
2 |
(Ink Overflow Counter error) |
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Fatal error*1 |
Off |
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On |
1 |
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“-”:Indicator status don’t change
“a->b”:a is a Indicator condition when carriage is on Home Position. b is a Indicator condition in Ink exchange sequence.
*1 : see
PRODUCT DESCRIPTION |
OPERATOR CONTROLS |
18 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.5.5 Printer Initialization
There are three kinds of initialization method.
(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, following action is 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 printer recognized the -INIT signal (negative pulse) of parallel interface.
When printer is initialized, following action is performed.
(a)Cap the print 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 initializes the printer.
When printer is initialized, following action is 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, following action is performed.
(a)Initializes printer mechanism.
(b)Clears input data buffer.
(c)Clears print buffer.
(d)Sets default values except I/F.
1.5.6 Errors
Ink out
When the printer runs out the most part of the ink of any one color, it warns inklow and keeps printing.When the printer runs out the whole ink of any one color, it stops printing and indicates ink-out error. User is requested to install a new inkcartridge in this state.
Paper out
When printer fails to load a sheet, it goes paper out error.
Paper jam
When printer fails to eject a sheet, it goes paper jam error.
No ink-cartridge
When printer detects that ink-cartridge comes off , it goes this error mode.
Maintenance request
When the total quantity of ink wasted through the cleanings and flushing is reaches to the limit, printer indicates this error and stops. The absorber in the printer enclosure is needed to be replaced with new one by a service person.
Fatal errors
Carriage control error.
* panel status is described on section1.4.4.
PRODUCT DESCRIPTION |
OPERATOR CONTROLS |
19 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.6 PAPER
1.6.1 Paper Handling
Do not perform reverse feed more than 0 mm(0”).
1.6.2 Paper Specification
Cut Sheet |
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Size |
: A4 (Width 210 mm(8.3") x Length 297 mm(11.7")) |
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: Letter (Width 215.9 mm(8.5") x Length 279.4 mm(11.0")) |
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: B5 (Width 182 mm(7.2") x Length 257 mm(10.1")) |
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: Legal (Width 215.9 mm(8.5") x Length 355.6 mm(14.0")) |
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: Half Letter (Width 139.7 mm(5.5") x Length 215.9 mm(8.5")) |
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: Exclusive (Width 184.2 mm(7.5") x Length 266.7 mm(10")) |
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: A5 (Width 148 mm(5.8") x Length 210 mm(8.3")) |
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: A6 (Width 105 mm(4.1") x Length 210 mm(8.3")) |
Thickness |
: 0.08 mm(0.003") - 0.11 mm(0.004") |
Weight |
: 64 g/m 2 (17 lb.55Kg) - 90 g/m 2 (24 lb.78Kg) |
Quality |
: Exclusive paper, Bond paper, PPC |
Envelope |
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Size |
: No.10 Width 241 mm(9 1/2") x Length 104.8 mm(4 1/8") |
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: DL Width 220 mm(8.7") x Length 110 mm(4.3") |
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: C6 Width 162 mm(6.4”) x Length 114 mm(4.5”) |
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: Envelope220*132 Width 220 mm(8.7”) x Length 132 mm(5.2”) |
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: Japanese CHOUKEI 3 Width 120 mm x Length 235 mm * |
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: Japanese CHOUKEI 4 Width 90 mm x Length 205 mm * |
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: Japanese YOUKEI 1 Width 120 mm x Length 176 mm * |
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: Japanese YOUKEI 2 Width 114 mm x Length 162 mm * |
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: Japanese YOUKEI 3 Width 98 mm x Length 148 mm * |
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: Japanese YOUKEI 4 Width 105 mm x Length 235 mm * |
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* except for glue. |
Thickness |
: N/A |
Weight |
:#10,DL,C6 45 g/m 2 (12 lb.) - 75 g/m 2 (20 lb.) |
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: CHOUKEI 50 g/m 2 (43Kg) - 70 g/m 2 (60Kg) |
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: YOUKEI 50 g/m 2 (43Kg) - 100 g/m 2 (86Kg) |
Quality |
: #10,DL,C6 Bond paper, Plain paper, Air mail |
:CHOUKEI4,3 Kraft, new Kent paper
:YOUKEI1,2,3,4 Kraft, new Kent paper
*Envelope printing is only available at normal temperature.
*Keep the longer side of the envelope horizontally at setting.
Exclusive paper
Quality |
: EPSON Exclusive paper |
* Transparency printing is only available at normal temperature. < Photo Quality Ink Jet Paper >
Size |
:A4 (210mm x 297mm) |
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:A6 (105mm x 148mm) |
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:B5 (182mm x 257mm) |
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:Letter (216mm x 279mm) |
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:Legal (216mm x 356mm) |
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:5” x 8” (127mm x 203mm) |
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:8” x 10” (203mm x 254mm) |
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:Post Card (100mm x 148mm) |
Thickness |
: 0.13 mm(0.005") |
Weight |
: 98 g/m 2 (26 lb.84Kg) |
<360 dpi Ink Jet Paper > |
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Size |
: A4 (210mm x 297mm) |
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: Letter (216mm x 279mm) |
Thickness |
: 0.11 mm(0.004") |
Weight |
: 89 g/m 2 (24 lb.78Kg) |
<RC paper> |
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Size |
: A4 (210mm x 297mm) |
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: Letter (216mm x 279mm) |
Thickness |
: <T.B.D.> |
Weight |
: <T.B.D.> |
<Ink Jet Transparencies> |
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Size |
: A4 (210mm x 297mm) |
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: Letter (216mm x 279mm) |
Thickness |
0.13 mm(0.005") |
Weight |
: N/A |
PRODUCT DESCRIPTION |
PAPER |
20 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
< Photo Quality Glossy Film >
Size |
: A4 (210mm x 297mm) |
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: A6 (105mm x 148mm) |
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: Letter (216mm x 279mm) |
Thickness |
: 0.13 mm(0.005") |
Weight |
: N/A |
<Matte paper Heavy weight> |
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Size |
: A4 (210mm x 297mm) |
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: Letter (216mm x 279mm) |
Thickness |
: 0.23 mm(0.009") |
Weight |
: 167 g/m 2 (44 lb.143Kg) |
< Iron-on Cool Peel Transfer Paper > |
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Size |
: A4 (210mm x 297mm) |
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: Letter (216mm x 279mm) |
Thickness |
: 0.18 mm(0.007") |
Weight |
: 124 g/m 2 (33 lb.107Kg) |
*Base paper weight. |
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<Ink jet paper> |
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Size |
: A4 (210mm x 297mm) |
Thickness |
: 0.11 mm(0.004") |
Weight |
: 80 g/m 2 (21 lb.45Kg) |
1.6.3 Printing Area
Cut Sheet
Figure 1-4. Printable Area for Cut Sheet
PRODUCT DESCRIPTION |
PAPER |
21 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
Raster Graphics mode
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PW |
PL |
LM |
RM |
TM |
Black BM |
Color BM |
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Paper size |
(Paper |
(Paper |
(left |
(Right |
(Top |
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(Bottom margin) |
(Bottom margin) |
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width) |
length) |
margin) |
margin) |
margin) |
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(min.) |
(min.) |
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(typ.) |
(typ.) |
(min.) |
(min.) |
(min.) |
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A4 |
210mm |
297mm |
3mm |
3mm |
3mm |
14mm (0.54”) |
21mm (0.83”) |
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(8.3”) |
(11.7”) |
(0.12”) |
(0.12”) |
(0.12”) |
/3mm (0.12”) |
/3mm (0.12”) |
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Letter |
216mm |
279mm |
3mm |
3mm |
3mm |
14mm (0.54”) |
21mm (0.83”) |
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(8.5”) |
(11.0”) |
(0.12”) |
(0.12”) |
(0.12”) |
/3mm (0.12”) |
/3mm (0.12”) |
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B5 |
182mm |
257mm |
3mm |
3mm |
3mm |
14mm (0.54”) |
21mm (0.83”) |
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(7.2”) |
(10.1”) |
(0.12”) |
(0.12”) |
(0.12”) |
/3mm (0.12”) |
/3mm (0.12”) |
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Lega |
216mm |
356mm |
3mm |
3mm |
3mm |
14mm (0.54”) |
21mm (0.83”) |
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(8.5”) |
(14.0”) |
(0.12”) |
(0.12”) |
(0.12”) |
/3mm (0.12”) |
/3mm (0.12”) |
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Statement |
139.7mm |
215.9mm |
3mm |
3mm |
3mm |
14mm (0.54”) |
21mm (0.83”) |
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(5.5”) |
(8.5”) |
(0.12”) |
(0.12”) |
(0.12”) |
/3mm (0.12”) |
/3mm (0.12”) |
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Executive |
190.5mm |
254mm |
3mm |
3mm |
3mm |
14mm (0.54”) |
21mm (0.83”) |
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(7.5”) |
(10”) |
(0.12”) |
(0.12”) |
(0.12”) |
/3mm (0.12”) |
/3mm (0.12”) |
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*Bottom margin is expanded to 3mm when paper dimension is defined by using command(ESC (S), otherwise it is not expanded (Black,14mm Color 21mm). Refer to Appendix C.
**Print quality may decline in the expanded areas(For 3 mm to 14 mm (Color 21mm) of the printing areas).
Envelope
Figure 1-5. Printable Area for Envelopes
Paper |
LM(Left |
RM(Right |
TM(Top |
Black BM |
Color BM |
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margin) |
margin) |
margin) |
(Bottom margin) |
(Bottom margin) |
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size |
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(min.) |
(min.) |
(min.) |
(min.) |
(min.) |
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#10 |
28mm(1.10 |
3mm(0.12”) |
3mm(0.12”) |
14mm(0.54”0 |
21mm(0.83”) |
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”) |
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/3mm(0.12”)* |
/3mm(0.12”)* |
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DL |
7mm(0.28”) |
3mm(0.12”) |
3mm(0.12”) |
14mm(0.54”0 |
21mm(0.83”) |
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/3mm(0.12”)* |
/3mm(0.12”)* |
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C6 |
3mm(0.12”) |
3mm(0.12”) |
3mm(0.12”) |
14mm(0.54”0 |
21mm(0.83”) |
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/3mm(0.12”)* |
/3mm(0.12”)* |
*Bottom margin is expanded to 3mm when paper dimension is defined by using command ESC (S), otherwise it is not expanded (Black,14mm Color 21mm). Refer to Appendix C.
**Print quality may decline in the expanded areas(For 3 mm to 14 mm (Color 21mm) of the printing areas).
PRODUCT DESCRIPTION |
PAPER |
22 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
1.7 INK CARTRIDGE
1.7.1 Black Ink Cartridge
Type |
: Exclusive cartridge |
Color |
: Black |
Print capacity |
: 270 pages / A4 (ISO/IEC10561 Letter Pattern at 360 dpi) |
Ink life |
: 2 years from production date |
Storage temperature |
: -20°C - 40°C (Storage, within a month at 40°C) |
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: -30°C - 40°C (Packing storage, within a month at 40°C) |
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: -30°C - 60°C (Transit, within 120 hours at 60°C and |
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within a month at 40) |
Dimension : 19.8 mm(W) x 52.7 mm(D) x 38.5 mm(H)
1.7.2 Color Ink Cartridge
Type |
: Exclusive cartridge |
Color |
: Magenta, Cyan, Yellow |
Print capacity |
: 150 pages /A4 (360 dpi, 5% duty each color) |
Ink life |
: 2 years from production date |
Storage temperature |
: -20°C - 40°C (Storage, within a month at 40°C) |
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: -30°C - 40°C (Packing storage, within a month at 40°C) |
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: -30°C - 60°C (Transit, within 120 hours at 60°C and |
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within a month at 40) |
Dimension |
: 42.9 mm(W) x 52.7 mm(D) x 38.5 mm(H) |
Ink cartridge (color) |
Ink cartridge (black) |
*Ink cartridge can not re-fill, only ink cartridge is prepared for article of consumption.
*Do not use the ink cartridge which was passed away the ink life.
*Ink will be frozen under -18 to -21 o C environment, however it will be usable after placing it more than 3 hours at room temperature. mm (0.12”) *
PRODUCT DESCRIPTION |
INK CARTRIDGE |
23 |
C H A P T E R
2
OPERATING PRINCIPLES
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
2.1 Overview
This section describes the operating principles of the printer mechanism and electrical circuit boards. The Stylus C40UX/C40SX/C20UX/C20SX has only the following two circuit boards:
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Main board: |
C413 MAIN/MAIN-B |
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Power supply board: |
C417 PSB/PSE |
2.1.1 Printer Mechanism
The printer mechanism for Stylus C40UX/C40SX/C20UX/C20SX is designed newly. But, the basic component of the printer mechanism is same as previous product.
This printer consists of Print Head, Carriage Mechanism, Paper Feeding Mechanism, Paper Loading Mechanism, Ink System (Pump Mechanism, Cap Mechanism, and Carriage Lock Mechanism).
Like other EPSON ink jet printers, the Stylus C40UX/C40SX/C20UX/C20SX is equipped with two stepping motors; one for ASF, Paper feeding/ Pump mechanism, and one for CR mechanism. ASF unit uses rear entry front eject system. This ASF unit is also designed newly and single LD roller loads the paper to the printer mechanism.
For cap assembly, Stylus C40UX/C40SX/C20UX/C20SX uses valveless mechanism; new design for this model.
Paper Eject Roller |
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PF Motor |
PF Roller |
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Star Wheel Roller |
CR Timing belt |
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CR unit |
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HP/PE/IC Sensor sensor |
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LD Roller |
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Paper feed back plate |
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Paper separation pad |
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ASF Hopper Spring |
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Clutch mechanism |
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Pump unit |
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CR Motor |
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Cap Assembly |
Figure 2-1. Printer Mechanism block diagram
Operating Principles |
Overview |
25 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
2.1.2 Printhead
The printhead uses a new developed U-CHIPS head and Stylus C40UX/C40SX/ C20UX/C20SX can perform multiple shot printing and variable printing. Printhead nozzle configuration is as follows.
48 nozzles x 1 row: Black (nozzle pitch of the row: 1/120 inch)
45 nozzles x 1 row: Color (nozzle pitch of the row: 1/120 inch)
In the one row for the color, 15 nozzles are assigned for each yellow, magenta, cyan color)
The basic operating principles of the printhead, which plays a major role in printing, are the same as previous models; on-demand method which uses PZT (Piezo Electric Element). In order to uniform the amount of ejecting ink, the printhead has its own head ID (6 digits for this printhead) which adjust PZT voltage drive features.
The printer read the head ID form EEPROM and generates appropriate PZT drive voltage to prevent amount of ink from varying by printheads.
Following explains printhead basic components.
PZT
PZT is an abbreviation of Piezo Electric Element. Certain amount of voltage expands and contracts PTZ. The drive wave generated on MAIN board drives PZT and PZT pushes the top cavity which has ink stored to discharge the ink from each nozzle on the nozzle plate.
Ink Cavity
The ink absorbed from the ink cartridge goes through the filter and then is stored temporarily in this tank called “cavity” until PZT is driven.
Nozzle Plate
The board with nozzle holes on the printhead surface is called Nozzle Plate.
Filter
When the ink cartridge is installed, if any dirt or dust around the cartridge needle is absorbed into the head, there is a great possibility of causing nozzle clog and disturbance of ink flow, and finally causing alignment failure and dot missing. To prevent this problem, a filter is set below the cartridge needle, where ink is filtered.
Head Driver Board
Ink Cartridge
Needle
Filter
Nozzle Plate |
PZT |
Cavity |
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Figure 2-2. Printhead Sectional Drawing
Operating Principles |
Overview |
26 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
2.1.2.1 Printing Process
This section explains the process in which the printheads of On-Demand inkjet printers eject ink from each nozzle.
1.Normal State:
When no printing signal is sent from PC, or no PZT drive voltage is applied, PZT does not change shape, therefore PZT does not squeeze the cavity. Ink pressure inside the cavity is kept normal. (Refer to Figure 2-3.)
2)Ejecting State:
When the print signal is output from the C413MAIN/B board, IC (Nozzle Selector) located on the printhead unit latches data once by 1-byte unit. An appropriate PZT latched by the nozzle selector is pushed into the cavity by the common voltage applied from the main board. By this operation, ink stored in the cavity spurts out from nozzles.(Refer to Figure 2.1.2.2.)
Ink Path |
PZT |
Ink Cavity |
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Nozzle |
Nozzle plate |
PZT drive voltage
Figure 2-3. Printhead printing process
2.1.2.2 Printing Method
For print dot system, Stylus C40UX/C40SX/C20UX/C20SX has the following two kinds of printing modes.
Multiple shot printing
Variable dot printing
The above two printing modes are automatically selected depending on the media and the resolution setting of the printer driver. The following explains each printing mode.
Multiple shot printing
This printing mode is developed to improve the print quality on plain paper or transparencies in low resolution. The multiple shot printing mode uses normal dot and the number of dot shots varies from 1 shot to maximum 4 shots depending on the print data to enable sharp image output even in a low resolution.
Variable dot printing
This printing mode is developed to improve the print quality on exclusive paper. This mode is basically the same as variable dot printing mode used on other products /; micro dot, middle dot, and large dot compose this mode. Print dot size varies according to print data and this mode enables even sharper image output on exclusive paper.
Operating Principles |
Overview |
27 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
2.1.3 Carriage Mechanism
The carriage mechanism consists of Carriage motor (CR motor), Carriage unit (including printhead), CR timing belt, CR guide shaft, CR guide frame, CR home & I/C detector (HP/PE/IC sensor) etc. The carriage mechanism moves the carriage back and forth according to the drive from the carriage motor. The following stepping motor is mounted to drive CR mechanism. (See the table below.)
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Table 2-1. Carriage Motor Specification |
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Items |
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Specifications |
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Type |
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4-Phase/ 48-Pole PM Stepping motor |
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Drive Voltage |
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+42 V +/ - 5% (DRV IC voltage) |
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Coil Resistance |
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10.8 Ω +/ - 10% (per phase at 25 degree) |
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Inductance |
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15 mH +/ - 20%(1KH 1VmA) |
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Drive Method |
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Bi-Polar drive |
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Driver IC |
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XC901503FNR2 |
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The drive from CR motor is transferred to the CR unit via CR timing belt. And the CR home position is detected with the HP/PE/IC sensor. This sensor is available as CR HP detector only in the HP (home position) detection sequence & pump operation sequence. (not available in the paper feeding sequence for the CR HP detector because it is used for only PE sensor during the paper feeding sequence.) Moreover, unlike the previous products, this printer dose not have the PG adjustment mechanism.
CR home position is detected with the HP/PE/IC sensor and the detection plate molded in the CR unit as following figure. When the CR home position is detected with this sensor, HIGH signal is output to the CPU.
|
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Right side view |
HP/IC detection Lever |
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CR HP detection plate
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HP/IC detection |
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Lever |
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CR HP detection plate |
Low signal |
High signal |
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Figure 2-5. CR home position
Unlike the previous products, I/C detection sensor is not built in the CR unit.
The I/C is detected with the HP/PE/IC sensor and the detection plate molded on the I/C cover as following figure. The I/C installation condition is monitored only when the CR unit moves to the I/C detection position (HP detection sequence). So, this sensor function is not available in the paper feeding sequence. When the I/C is not installed into the CR unit, HIGH signal is output to the CPU.
HP/IC detection Lever |
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Right side view |
I/C detection plate
HP/PE/ICSensor |
CR Motor |
HP/IC detection |
Lever |
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High signal |
Low signal |
I/C detection plate |
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Figure 2-6. |
I/C detection position |
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CR unit |
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CR Timing belt |
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Figure 2-4. Carriage Mechanism (Top view)
Operating Principles |
Overview |
28 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
Also, when replacing ink use this lever to confirm whether the cover cartridge is open or closed.
There are separate replacement positions for replacing the Black and Color ink cartridges. If the cover cartridge is open, the I/C detection plate makes contact with the HP/IC detection lever, causing the HP/IC sensor to detect a high signal.
HP/IC detection Lever |
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Right side view |
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I/C detection plate
HP/IC |
detection Lever |
High signal |
Low signal |
I/C detection plate
Figure 2-7. I/C change position
If a High signal is detected even once, it is regarded as if that ink cartridge was replaced and the cleaning and ink counters are cleared.
If the High signal is not detected even once, the cleaning and ink counter are not cleared.
If both the ink cartridges have not been set before carrying out initial filling, the carriage moves to the position where both ink cartridges can be set, but checking if the cartridge is open or closed is not done.
If one of the ink cartridges has not been set, the carriage moves to the replacement position of the ink cartridge that is not set due to one time prevention of the set ink cartridge.
Operating Principles |
Overview |
29 |
Stylus C40UX/C40SX/C20UX/C20SX |
Revision B |
2.1.4 Paper Feeding Mechanism
The paper feeding mechanism consists of Paper feed motor (PF motor), PF roller, Paper eject roller, Star wheel roller, and so on. The paper feeding mechanism feeds paper loaded from ASF using the PF roller and Paper Eject Roller & Star wheel roller. For this mechanism, the PF motor mentioned in the right Table 2-2 is used on this product.
The drive of the PF motor is transfer to the PF roller and the Paper Eject Roller as following Figure 2-8. Following shows you how to transfer the PF motor drive to the PF roller and the Paper Eject Roller.
PF motor drive transmission path
PF Motor Pinion Gear (CW) → |
Spur Gear 60 (PF roller)(CCW) |
→ |
Spur Gear 60 (PF roller)(CCW) |
Table 2-2. PF Motor Specifications
Item |
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Description |
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Motor type |
4-Phase/ 48-Pole PM Stepping motor |
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Drive voltage |
+42 V +/ - 5% |
(DRV IC voltage) |
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Coil Resistance |
10 Ω +/ - 10% |
(per phase) |
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Inductance |
10.5 mH +/ - 20%(1kH 1Vrms) |
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Driving method |
Bi-Polar drive |
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Driver IC |
XC901503FNR2 |
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Spur Gear 35.2 |
Change Lever |
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Combination |
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Gear 16, 32 |
PF roller |
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Spur Gear 10. 8 |
Spur Gear 25.6 |
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Spur Gear 18. 28 |
Spur Gear 27. 2 |
Figure 2-8. Paper Feeding Mechanism
Paper loaded from ASF is advanced by the following roller.
Paper feed roller & Paper guide roller (assembled on the Top Frame) → Paper eject roller & Star wheel roller (assembled on the Paper eject frame).
Operating Principles |
Overview |
30 |
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