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EPSON TERMINAL PRINTER
Stylus COLOR IIs & Stylus 820
TM TM
SERVICE MANUAL
EPSON
4005245
NOTICE
All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON's express written permission is forbidden. The contents of this manual are subjects to change without notice. All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can assume no resoinsibility for any errors in this manual or the consequence thereof. Epson and Epson's ESC/P are registered trademark of Seiko Epson Corporation. General Notice: Other product names used herein are for identication purpose only and may be trademark of their respective companies.
+ Copyright 1995 by SEIKO EPSON CORPORATION Nagano, Japan -i-
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal jnjuury and 2) damage to 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. Signals a precaution which, if ignored, could result in damage to equipment.
WARNING
The precautionary measures itemized below should always be observed when performing repair/ maintenance procedures.
DANGER
1. 2. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK. WHEN PERFORMING TESTING AS DCTATED 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.
3.
WARNING
1. 2. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THATTHE 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. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT,SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNALCOMPONENTS. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.
3.
4.
5.
-ii-
PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of Stylus Color IIs / Stylus 820. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows:
CHAPTER 1. PRODUCT DESCRIPTION
Provides a general product overview, lists specifications, and illustrates the main components of the printer.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of printer operation.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
Includes the step-by-step guide for product disassembly and assembly
CHAPTER 4. ADJUSTMENTS
Includes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTING
Provides Epson-approved techniques for adjustment.
CHAPTER 6. MAINTENANCE
Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
APPENDIX
Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.
The contents of this manual are subject to change without notice.
-iv-
REVISION SHEET Revision
Rev.-A
Issue Date
August 25,1995
Contents
1st issue
-v-
TABLE OF CONTENTS
CHAPTER 1. CHAPTER 2. CHAPTER 3 CHAPTER 4. CHAPTER 5. CHAPTER 6. APPENDIX PRODUCT DESCRIPTION OPERATION PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENT TROUBLESHOOTING MAINTENANCE
-vi-
Chapter 1 Operating Principles
Table of Contents
1.1 OVERVIEW 1.2 SPECIFICATIONS 1.2.1 Printing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.2 Paper Handling Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.3 Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.4 Ink Cartridge Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.5 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.6 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.8 Safety Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.9 Acoustic Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2.10 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-1 1-2 1-4 1-4 1-6 1-7 1-7 1-8 1-8 1-8 1-8
1.3 INTERFACE SPECIFICATIONS 1-9 1.3.1 Parallel Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 1.4 OPERATION CONTROLS 1.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.2 Panel Operation and Built-in Function. . . . . . . . . . . . . . . . . . . . . . . . . 1.4.3 Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.3.1 Setting Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.3.2 Setting Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.4 Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.5 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.5.1 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.5.2 Sofware Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4.5.3 Panel Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 MAIN CONPONENTS 1.5.1 Main Control Board(C160 Main Control Board) . . . . . . . . . . . . . . . . . 1.5.2 Power Supply Board(C160 PSB/PSE Board) . . . . . . . . . . . . . . . . . . . . 1.5.3 C160 I/F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5.4 Printer Mechanism((M-4C10). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5.5 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 1-11 1-11 1-14 1-14 1-15 1-18 1-18 1-18 1-18 1-18 1-19 1-19 1-20 1-20 1-21 1-21
Rev. A
1-i
List of Figures
Figure 1-1. Exterior View of the Stylus Color IIs(820) . . . . . . . . . . . . . . . . . . 1-1 Figure 1-2. Nozzle Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Figure 1-3. Printable Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Figure 1-4. Paper Select Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Figure 1-5. Temperature / Humidity Range . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Figure 1-6. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 Figure 1-7. Control Panel Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 Figure 1-8. C160 Main Control Board Component Layout . . . . . . . . . . . . . 1-19 Figure 1-9. C160 PSB/PSE Board Component Layout . . . . . . . . . . . . . . . . 1-20 Figure 1-10. C160 I/F Board Component Layout . . . . . . . . . . . . . . . . . . . . . 1-20 Figure 1-11. M-4C10 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 Figure 1-12. Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
List of Tables
Table 1-1. Print Speed and Printable Column . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Table 1-2. Character Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Table 1-3. Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Table 1-4. Adjust Lever Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Table 1-5. Paper Select Lever Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Table 1-6. Black I/C Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Table 1-7. Color I/C Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Table 1-8. Rated Electrical Ranges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Table 1-9. Acceptable Environmental Conditions. . . . . . . . . . . . . . . . . . . . . 1-7 Table 1-10. Siganal and Connector Pin Assignment for Parallel I/F . . . . . 1-10 Table 1-11. Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 Table 1-12. Built-in Functions on the Panel. . . . . . . . . . . . . . . . . . . . . . . . . 1-12 Table 1-13. Button Operations in Default Setting Mode . . . . . . . . . . . . . . . 1-12 Table 1-14. Error Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 Table 1-15. Default Setting Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 Table 1-16. Language Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 Table 1-17. Feature Selections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 Table 1-18. Character Table Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1-ii
Rev. A
Stylus Color IIs / Stylus 820
Product Description
1.1 FEATURES
The Stylus Color IIs printer is a color ink jet dot matrix printer that comes with a 64-nozzle black printhead and a 60-nozzle CMY color printhead, either of which can be installed in the printer. The Stylus 820 version of the same printer comes standard with only the 64-nozzle black printhead; however, the CMY color printhead can be purchased as an optional upgrade. Whenever this manual mentions the Stylus Color IIs, its descriptions are equally applicable to the Stylus 820. The major printer features are: t High-quality color print -720 dpi printing -720 dpi printing on plain paper -720, 360 dpi printing on special coated paper (Use the monochrome head only with plain paper) High-speed print -LQ 125 cps (monochrome head) -LQ 170 cps (CMY head, using one-pass printing) The CMY head prints 360 dpi printing in three passes. Built-in auto sheet feeder -Plain paper (Can be installed up to the hopper guide marker.) -Transparency film (Can be installed up to the hopper guide marker.) -Glossy paper (1-sheet only) -Coated paper (Can be installed up to the hopper guide marker.) -Envelopes (30 sheets) -Postcards (30 sheets) Built-in I/F -Parallel I/F only (8-bit parallel: IEEE P1284 mode) Easy setup -No DIP switches t 3 scalable fonts and 3 LQ fonts standard -Roman T, Sans Serif H, Roman, Sans Serif (scalable) -Roman, Sans Serif, Courier, Prestige, Script (LQ, bitmap) Character tables -9 character tables (standard version) -15 character tables (NLSP version) Low running cost
t
Note: t
t t
t
t
The figure below shows the Stylus Color IIs.
Figure 1-1. Exterior Viewing of Stylus Color IIs(820)
Rev. A
1-1
Product Description
Stylus Color IIs / Stylus 820
1.2 SPECIFICATIONS
This section provides statistics and other detailed information for the printer.
1.2.1 Printing Specifications
Print system: Nozzle configuration: On-demand ink jet system 64 nozzles (10 × 2 + 11 × 4 standard ): monochrome 60 nozzles (20 × 3 standard): color
120 dpi
#1 #1 #1
120 dpi
#1
360 dpi
#2
#2
#2
#2
#6
#5
#3
#4
#19
#19
#20
#19
#20 #20
(Row M)
(Row C)
(Row Y)
#60 #59
#61
#64
#62
#63
(A)
(B)
(C)
(D)
(E)
(F)
Figure 1-2. Nozzle Configuration
Printing direction:
Bidirectional with logic-seeking
Table 1-1. Print Speed and Printable Columns
Character Pitch 10 cpi (Pica) 12 cpi (Elite) 15 cpi 17 cpi (Pica condensed) 20 cpi (Elite condensed) Printable Columns Printing Speed (cps) Monochrome 80 96 120 136 160 125 150 188 214 250 CMY 170 204 255 290 340
1-2
Rev. A
Stylus Color IIs / Stylus 820
Character tables: Legal and 14 international sets
Product Description
Table 1-2. Character Tables
Bitmap Fonts Character Tables Scalable Fonts EPSON Roman T EPSON Sans Serif H
EPSON Roman EPSON Roman EPSON Sans Serif EPSON Sans EPSON Courier Serif
Standard
NLSP
Italic PC437 (U.S./Standard Europe) PC850 (Multilingual) PC860 (Portuguese) PC861 (Icelandic) PC863 (Canadian-French) PC865 (Nordic) Abicomp BRASCII Italic PC437 (U.S./Standard Europe) PC850 (Multilingual) PC437 (Greek) PC852 (East Europe) PC853 (Turkish) PC855 (Cyrillic) PC857 (Turkish) PC866 (Russian) PC869 (Greek) MAZOWIA (Poland) Code MJK (Czecho/Slovakia) ISO 8859-7 (Latin/Greek) ISO Latin 1T (Turkish) Bulgaria (Bulgaria)
Supported
Supported
Supported
Supported
Supported
Supported
Supported
Supported
Not supported
Fonts:
Bitmap LQ fonts - EPSON Roman (10 cpi/12 cpi/15 cpi/Proportional) - EPSON Sans Serif (10/12/15/Proportional) - EPSON Courier (10/12/15) Scalable fonts - EPSON Roman 10.5 points, 8 32 points (in units of 2 points) - EPSON Sans Serif 10.5 points, 8 32 points (in units of 2 points) - EPSON Roman T 10.5 points, 8 32 points (in units of 2 points) - EPSON Sans Serif H 10.5 points, 8 32 points (in units of 2 points)
Control codes: Input data buffer:
ESC/P 2 and expanded raster graphics codes 0.5KB or 64KB
Rev. A
1-3
Product Description
Stylus Color IIs / Stylus 820
1.2.2 Paper Handling Specifications
Feeding method: Line spacing: Paper path: Feeding speed: Friction feed paper is fed from the built-in auto sheet feeder (ASF). 1/6 inch feed or programmable in 1/360 inch minimum increments. Cut sheets are fed from the built-in auto sheet feeder (ASF). Top in and front out. 102 msec. (at 1/6-inch feed pitch).
1.2.3 Paper Specifications Table 1-3. Paper Specifications
Cut Sheets Envelopes Transparencies A4 PW PL LM RM TM BM Width Length Left margin Right margin Top margin Bottom margin 210 mm 297 mm 3 mm or more 3 mm or more 3 mm or more 14 mm or more Letter 216 mm 279 mm 3 mm or more 3 mm or more 3 mm or more 14 mm or more
PW LM RM TM
Legal 216 mm 358 mm 3 mm or more 3 mm or more 3 mm or more 14 mm or more
No. 10 240 mm 104 mm 3 mm or more 3 mm or more 3 mm or more 14 mm or more
DL 220 mm 110 mm 3 mm or more 3 mm or more 3 mm or more 14 mm or more
PL
BM
Figure 1-3. Printable Area
1-4
Rev. A
Stylus Color IIs / Stylus 820
Product Description
The adjust lever on the upper case must be set to the proper position for the paper thickness, as shown in Table 1-4.
Table 1-4. Adjust Lever Settings
Lever Position Front (0 position) Rear (+ position) Paper Normal position Paper Thickness 0 mm 0.62 mm
Also the paper select lever on the upper case must be set to the proper position for the paper varieties shown in Table 1-5.
Table 1-5. Paper Select Lever Settings
Specifications for the Medium Envelopes Postcards OK NO OK NO
PF Mode
Lever Position Thick paper (Rear)
Cut Sheets NO OK OK NO
Thinner Paper
ASF Feed
Thinner paper (Front) Thick paper (Rear)
Manual Feed
Thinner paper (Front)
Paper Select Lever
Manual Feed
Auto Feed
Thicker Paper
Hopper
Paper In
Paper Out
Figure 1-4. Paper Select Lever
Note:
"OK" means paper can be used and "NO" means paper cannot.
Rev. A
1-5
Product Description
Stylus Color IIs / Stylus 820
1.2.4 Ink Cartridge Specifications Table 1-6. Black I/C Specifications
Item Type Color and Weight Ink Life Validity Storage Temperature Dimensions Exclusive cartridge Approximately 54 g (internal ink weight is 36 g ± 0.5 g) High-quality ink produces 800 thousand characters 2 years (sealed in package) / 6 months (out of package) t 30 to 40° C (-22 104° F) (Storage: a month or less at 40° C (104° F)) t 20 to 40° C (-15 104° F) (Transit: a month or less at 40° C (104° F)) t 30 to 60° C (-22 140° F) (Transit: 120 hours or less at 60° C (140° F)) 30.0 (W) × 58.0 (D) × 38.5 ± 0.3 (H) mm Specifications
Table 1-7. Color I/C Specifications
Item Type Color and Weight Ink Life Validity Storage Temperature Dimensions Exclusive cartridge Approximately 70 g (internal ink weight is 12.8 g ± 0.5 g) 100% solid pattern: A4 -- 16 sheets / each color 2 years (sealed in package) / 6 months (out of package) t 30 to 40° C (-22 104° F) (Storage: a month or less at 40° C (104° F)) t 20 to 40° C (-15 104° F) (Transit: a month or less at 40° C (104° F)) t 30 to 60° C (-22 140° F) (Transit: 120 hours or less at 60° C (140° F)) 42.9 (W) × 56.5 (D) × 38.5 ± 0.3 (H) mm Specifications
1-6
Rev. A
Stylus Color IIs / Stylus 820
Product Description
1.2.5 Electrical Specifications Table 1-8. Rated Electrical Ranges
Specification Rated voltage Input voltage range Rated frequency range Input frequency range Rated current Power consumption 120 V Version 120 VAC 103.5 132 V 50 60 Hz 49.5 60.5 Hz 0.5 A 220 - 240 V Version 220 - 240 VAC 198 264 V 50 60 Hz 49.5 60.5 Hz 0.3 A
Approx. 13 W Approx. 13 W (self-test with 10-cpi LQ characters) (self-test with 10-cpi LQ characters) 10 M, minimum 10 M, minimum (applying 500 VDC between AC line (applying 500 VDC between AC line and chassis) and chassis) 1000 VAC rms for 1 minute or 1200 VAC rms for 1 second (between AC line and chassis) 1500 VAC rms for 1 minute (between AC line and chassis)
Insulation resistance
Dielectric strength
1.2.6 Environmental Conditions Table 1-9. Acceptable Environmental Conditions
Condition Temperature Humidity Shock resistance Vibration resistance
*1 *2 *3
Operating 10 35° C (50 95° F) *1 20 80% RH *1, 3 1G (within 1 msec.) 0.15 G
Non Operating -20 60° C (-4 122° F) *2 5 85% RH *2, 3 2G (within 2 msec.) *2 0.50 G *2
: For printer operation, conditions must be in the range shown in the figure below. : These conditions are applicable when the printer is in its shipping container. : Without condensation.
Humidity (% RH)
80%
Guaranteed Range
55%
20%
10
27
35
(Degrees)
Figure 1-5. Temperature / Humidity Range
Rev. A
1-7
Product Description
Stylus Color IIs / Stylus 820
1.2.7 Reliability
Total print volume: Printhead life: 25,000 pages (A4, letter) 500 million dots/nozzle (color and monochrome)
1.2.8 Safety Approvals
Safety standards: 120 V version: 220-240 V version: Radio frequency interference (RFI): 120 V version: 220-240 V version: UL1950 with D3, CSA C22.2 # 950 with D3 EN 60950 (TÜV, SEMKO, DEMKO, NEMKO, SETI) FCC Part 15 Subpart B Class B Vfg.243 (VDE0878 part 3, part 30) EN55022 (CISPR PUB. 22) class B CSA C108.8
1.2.9 Acoustic Noise
Level: Approximately 45 dB (A) (Per ISO 7779)
1.2.10 Physical Specifications
Dimensions (W × D × H): Weight: 396.7 mm (W) × 205.6 mm (D) × 144.0 mm (H) About 3.9 kg (8.6 lb.), excluding head and ink cartridge
1-8
Rev. A
Stylus Color IIs / Stylus 820
Product Description
1.3 INTERFACE SPECIFICATIONS
The Stylus Color IIs is standard-equipped with an 8-bit parallel and serial interface.
1.3.1 Parallel Interface Specifications
Data format: Synchronization: Handshaking: Signal level: Adaptable connector: 8-bit parallel By STROBE pulse synchronization By BUSY and ACKNLG signals TTL compatible level 36-pin 57-30360 (Amphenol) or equivalent
BUSY ACKNLG
0 µsec(min.) 5 µsec (min.)
DATA STROBE
0.5 µsec (min.) 0.5 µsec (min.) 0.5 µsec (min.)
Figure 1-6. Data Transmission Timing
Data transmission timing: See Figure 1-6. Transition time (rise time and fall time) of every input signal must be less than 0.2 µs.
Note:
The Busy signal is active (HIGH) under the following conditions: t During data reception (See Figure 1-6.) t When the input buffer is full t When the INIT input signal is active t During initialization t When the ERROR or PE signal is active t During the self-test mode t During the demonstration mode t During the default setting mode t When a fatal error occurs The ERROR signal is active (LOW) under the following conditions: t When a paper-out error occurs t When a no ink cartridge error occurs t When a fatal error occurs The PE signal is active (HIGH) under the following conditions: t When a paper-out error occurs t When a fatal error occurs
Rev. A
1-9
Product Description
Stylus Color IIs / Stylus 820
Table 1-10 shows the connector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-10. Signal and Connector Pin Assignments for Parallel Interface
Pin No. Signal Name I/O* Description The STROBE pulse is used to read data from the host computer. The pulse width must be 0.5 µs or more. Normally, it is HIGH, and data is latched with the rising edge of this signal. DATA 1-8 are parallel data bits. When one of these signals is HIGH, the data bit is 1; when LOW, the data bit is 0. The most significant bit (MSB) is DATA 8. The signal state must be maintained for 0.5 µs on either side of the STROBE signal's active edge. ACKNLG is an acknowledge pulse with a width of approximately 10 µs. This signal goes LOW upon the completion of data reception to indicate that the printer is ready to receive further data. The BUSY signal informs the host computer of the printer's status. When this signal is HIGH, the printer cannot accept any more data. This signal indicates whether paper is available in the printer or not. A HIGH level indicates no paper. Pulled up to +5 V through a 1.0 K resistor in the printer. If this signal is set to LOW, the printer automatically performs one line feed upon receipt of a CR (carriage return) code. The status of this signal is checked only at power on and initialization. If this signal goes LOW, the printer is initialized. The pulse width of this signal must be 50 µs or more. This signal goes LOW if the printer has a fatal error or runs out of paper. Pulled up to +5 V through 1.0 K resistor in the printer. Chassis ground. Signal ground. -- Not used. --
1
STROBE
I
2-9
DATA 1-8
I
10
ACKNLG
O
11
BUSY
O
12 13
PE SLCT
O O
14
AFXT
I
31 32 35 17 16 19-30 33,36 15,18,34
INIT ERROR +5 V CHASSIS GND -- -- --
I O -- -- -- -- -- --
*
The I/O column indicates the direction of the signal as viewed from the printer.
1-10
Rev. A
Stylus Color IIs / Stylus 820
Product Description
1.4 OPERATIONS
This section describes the basic operations of the printer.
1.4.1 Control Panel
The control panel for this printer has 3 non-lock-type push buttons, and 5 LED indicators for easy operation of the various printer functions.
Power
Error
Condensed Economy
Alt
Load / Eject
Pause
Cleaning
Figure 1-7. Control Panel Appearance
1.4.2 Panel Operation and Built-in Function
You can activate the following modes by doing the procedure in table 1-11 and 1-12.
Table 1-11. Panel Operation
Button ^ ^ Alt Load/Eject Pause Operations Single Button Operations Pressed and released No function Load/Eject Pause Held down 3 seconds I/C or head unit replacement No function Reset + Combined with Alt Button Pressed and released ------ Economy/Condensed Cleaning
Rev. A
1-11
Product Description
Stylus Color IIs / Stylus 820
Table 1-12. Built-in Functions on the Panel
Button Alt Load/Eject Pause Alt + Load/Eject Load/Eject + Pause Pause + Alt Pause + Load/Eject + Pause Other combinations Demonstration printing Self-test Default setting mode (with printing) Non-smear printing Data dump mode (Hex mode) Default setting mode (without printing) Reset to the default settings Not available Function
Table 1-13. Button Operations in Default Setting Mode
Button Alt Pause Function Move to the next item or menu Set item
1-12
Rev. A
Stylus Color IIs / Stylus 820
Product Description
Indicators
Power Error Condensed Economy Pause
LED combinations On when printer is on. Blinks during power on and off. On when printer encounters an error, such as ink end, paper out, paper jam, etc. On when printer is in the condensed mode (50% or 80%). On when printer is in the economy mode. On when printer is paused. See Table 1-14.
Table 1-14. Error Indications
Printer Status ^ Pause Economy Condensed Panel reset accepted Ink low (printable) Ink out (unprintable) Paper out Paper jam Head, I/C replacement Head, I/C not installed (in replacement mode) Head, I/C not installed Carriage control error Maintenance request Power On On On On On On On On On On On On On Indicators Error -- -- On Blinks Blinks (rapidly) On Off Off Blinks Blinks Blinks Blinks Blinks Condensed -- -- On On -- -- -- -- -- -- Off Blinks Blinks Economy -- On -- On -- -- -- Blink -- -- Off Off Blinks + Pause On -- -- On -- On On On Blinks Blinks Blinks Blinks Blinks
Rev. A
1-13
Product Description
Stylus Color IIs / Stylus 820
1.4.3 Default Settings
The printer can save some printer setting parameters that define its functions at initialization. You can change these parameters using the printer's default setting mode.
1.4.3.1 Default Setting Items
You can use default setting mode to change settings listed in the table below. Activate default-setting mode by holding down the Pause or the Pause and Alt buttons (for default setting mode without printing) while turning on the printer.
Table 1-15. Default Setting Items
Item Character Tables Standard Version Italic USA Italic France Italic Germany Italic UK Italic Denmark Italic Sweden NLSP Version Italic USA Italic France Italic Germany Italic UK Italic Denmark Italic Sweden Italic Italy Italic Spain Roman Sans Serif Courier Roman T (PS) Sans Serif H (PS) Italic Italy Italic Spain PC437 PC850 PC860 PC863 Selections + + PC865 PC861 BRASCII Abicomp ^ ^ +
^
^ ^ ^
^
PC437 PC850 PC853 PC857 PC437 Greek PC855 PC866 PC852
PC869 ISO 8859-7 ISO Latin 1T MAZOWIA Code MJK Bulgaria
Typestyles
+
Character Pitches
10 CPI (10 CPI, Condensed off) 12 CPI (12 CPI, Condensed off) 15 CPI (15 CPI, Condensed off) 17.1 CPI (10 CPI, Condensed on) 20 CP I(12 CPI, Condensed on) Proportional (PS, Condensed off) Auto Bidirectional Uni-directional Off (Usual environment) On (Network environment)
+
Print Direction
+
Network I/F Mode
+
1-14
Rev. A
Stylus Color IIs / Stylus 820
Product Description
Table 1-15. Default Setting Items (Continued)
Item Auto line feed Loading position Thick paper Contents
Off On 8.5 mm 3 mm Envelopes Index card (portrait)
Note:
The underlined value is the factory setting.
1.4.3.2 Changing the Default Settings
To change the printer's default settings: 1. Hold down the Pause button and turn on the printer. The printer outputs a sheet that shows the firmware version and describes how to select the language used to print messages. You can select a language by pressing the Alt button, and set it by pressing the Pause button. (See Table 1-16.)
Table 1-16. Language Selection
Error LED English Francias Deutsch Italiano Espańol 2. 3. On Off On Off On Condensed LED Off On On Off Off Economy LED Off Off Off On On
Press the Pause button. The printer prints the current settings using the selected language. It also prints a table showing how to change printer settings. Press the Alt button to advance through the setting menus. The current printer settings are indicated by the Error, Condensed, and Economy LEDs. Each time you press the Pause button, you advance to the next setting, and the three font LEDs change according to the selection. After you set all values, turn the printer off to save the new settings.
4.
Rev. A
1-15
Product Description
Stylus Color IIs / Stylus 820
Table 1-17. Feature Selections
Menu Feature/ Menu Character Table Print Direction ^ ^ Network I/F Mode ^ Auto Line Feed ^ Loading Position ^ Font ^ ^ ^ ^ Pitch ^ ^ ^ ^ ^ Thick Paper ^ Off Off Off On On On Off On On Off Off On Off On Off Error LED On Condensed LED Off Economy LED Off Auto Bi-D Uni-D Off On Off On On Off On 3 mm 8.5 mm Roman Sans serif Courier Roman T Sans serif H 10 CPI 12 CPI 15 CPI 17.1 CPI 20 CPI Proportional Envelopes Index cards Setting
Setting Value
Error LED Condensed LED
+ Economy LED + Off On Off Off On Off On Off On Off On Off On Blinks Off On Off On Blinks Blinks Off On Off Off On Off Off Off Off Off Off Off Off On On Off Off Off On On Off Off Off Off
See Table 1-18. Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Blinks Off Blinks Blinks Blinks Blinks Off On Blinks Blinks
On
On
Off
1-16
Rev. A
Stylus Color IIs / Stylus 820
Product Description
Table 1-18. Character Table Selection
Version Common ^ ^ ^ ^ ^ ^ ^ ^ ^ Standard ^ ^ ^ ^ ^ NLSP ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ Settings Italic U.S.A. Italic France Italic Germany Italic U.K. Italic Denmark 1 Italic Sweden Italic Italy Italic Spain 1 PC437 PC850 PC860 PC863 PC865 PC861 BRASCII Abicomp PC437 Greek PC853 PC855 PC852 PC857 PC866 PC869 MAZOWIA Code MJK ISO 8859-7 ISO Latin 1T Bulgaria
Error LED
Blinks Blinks Blinks Blinks Off On Off On Off On Off On Blinks Blinks Off On Blinks Off Blinks On On Off Blinks Off On Blinks Blinks Off
Condensed LED
Off On Off On Blinks Blinks Blinks Blinks Off Off On On Blinks Blinks Blinks Blinks Blinks On Blinks Blinks On Blinks Off On On On Blinks Off
Economy LED Off Off On On Off Off On On Blinks Blinks Blinks Blinks Off On Blinks Blinks Off Blinks Off Blinks Blinks Blinks Blinks On On Blinks Blinks Off
Rev. A
1-17
Product Description
Stylus Color IIs / Stylus 820
1.4.4 Error Conditions
The printer can detect various errors and indicate them with LEDs. Refer to Table 1-14.
1.4.5 Printer Initialization
There are three initialization methods: hardware initialization, software initialization, and panel initialization.
1.4.5.1 Hardware Initialization
Hardware initialization is performed by: - Turning on the printer. - Sending the parallel interface the INIT signal. (If the INIT signal is active when the printer is turned on, hardware initialization is started when the INIT signal becomes inactive.) When hardware initialization is performed: - The printer mechanism is initialized. - Input data buffer is cleared. - Downloaded character definitions are cleared. - Print buffer is cleared. - Default values are set.
1.4.5.2 Software Initialization
Software initialization is performed upon receipt of the control code ESC @. When software initialization is performed: - The print buffer is cleared. - Default values are set.
1.4.5.3 Panel Initialization
Panel initialization is performed by holding down the Alt button for 3 seconds. When the panel initialization is performed: - The input data buffer is cleared. - The print buffer is cleared. - Default values are set.
1-18
Rev. A
Stylus Color IIs / Stylus 820
Product Description
1.5 MAIN COMPONENTS
The main components of the Stylus Color IIs are: t t t t t Printer mechanism (M-4C10) Main control board (C160 MAIN Board) Power supply unit (C160 PSB/PSE Board) Control panel board (C160 I/F Board) Housing
1.5.1 Main Control Board (C160 MAIN Board)
The main control board (C160 MAIN Board) consists of an M37720 16-bit CPU, E05B08 gate array, a program ROM (4M), a PS-RAM (1M), a mask ROM (4M or 8M: If a 4M-bit program ROM is mounted on the board, an 8M-bit CG-ROM is mounted in location IC5, and if an 8M-bit program ROM is mounted on the board, there is no CG-ROM in location IC5.) and a 1K EEPROM. The reset IC (M51955 and PST 592) is equipped with both a logic system and a power system.
Note:
During servicing, when you replace the program ROM, always install an 8M-bit program ROM regardless of the components mounted on that particular board. When you do this, the CG-ROM in location IC5 is ignored.
CN1 CN2
CPU M3772051 (IC2)
CN4 CN3
CN5 CN6
SW3 E05B08 (IC1) 8M Bit CG-ROM (IC5) 1M Bit PSRAM (IC4) 4M or 8M Bit PROM (IC3) CN8 CN7
SW2
SW1
Figure 1-8. C160 Main Control Board Component Layout
Rev. A
1-19
Product Description
Stylus Color IIs / Stylus 820
1.5.2 Power Supply Board (C160 PSB/PSE Board)
The power supply board (C160 PSB/PSE Board) consists of an RCC switching regulator circuit. This board does not have a power switch connected to the secondary circuit like the Stylus Color series. Thus, if the printer is turned off, it cannot continue to operate in order to perform the head capping operation.
Q1 (FET) Trans (T1) C11 CN2
Photo Coupler (PC1) Photo Coupler (PC2)
Power SW
Filter (L1)
Fuse (F1)
CN1 Choke Cil (C1)
Figure 1-9. C160 PSB/PSE Board Component Layout
1.5.3 Interface Board (C160 I/F Board)
There is an exclusive interface board to receive/transmit print data between the host computer and printer.
CN1 CN2
JAPAN version only (Serial I/F)
Figure 1-10. C160 I/F Board Component Layout
1-20
Rev. A
Stylus Color IIs / Stylus 820
Product Description
1.5.4 Printer Mechanism (M-4C10)
The M-4C10 printer mechanism is equipped with a replaceable 64-nozzle black printhead and 60-nozzle color (CMY) printhead, and it can print at a high resolution (720 dpi) using the special coated paper.
Figure 1-11. M-4C10 Printer Mechanism
1.5.5 Housing
The Stylus Color IIs housing consists of the printer cover, upper case, and lower case. Attached to the housing are the front paper support and ejected paper support with paper separator.
Upper Case Eject Paper Stacker Waste Ink Drain Tank
M4C10 Mechanism Space
Figure 1-12. Housing Component Layout
Rev. A
1-21
Chapter 2 Operating Principles
Table of Contents
2.1 OVERVIEW 2-1
2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM 2-1 2.2.1 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2.2 Printing Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.2.3 Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 2.2.3.1 Platen Gap Adjust Laver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2.2.3.2 Paper Select Lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2.2.4 Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.2.5 Ink System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2.2.6 Pump Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2.2.7 Cap Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 2.2.8 Wiping Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 2.2.9 Carriage Lock Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITS 2.3.1 Operating Principles of the Power Supply Circuit . . . . . . . . . . . . . . . 2.3.2 Operating Principles of the Main Control Circuit . . . . . . . . . . . . . . . . 2.3.2.1 Reset Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3.2.2 Sensor Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3.2.3 Carriage Motor Driver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3.2.4 Paper Feed Motor Driver Circuit . . . . . . . . . . . . . . . . . . . . . . . 2.3.2.5 Printhead Driver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2-18 2-20 2-21 2-22 2-23 2-25 2-26
Rev. A
2-i
List of Figures
Figure 2-1. Printer Mechanism Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . 2-1 Figure 2-2. Structure of Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Figure 2-3. Principles of the Printing Operation . . . . . . . . . . . . . . . . . . . . . . 2-3 Figure 2-4. Dual Firing Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Figure 2-5. 720 dpi Printing for Stylus Color IIs (820) . . . . . . . . . . . . . . . . . . 2-5 Figure 2-6. Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 Figure 2-7. PG Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Figure 2-8. Paper Select Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 Figure 2-9. Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 Figure 2-10. Ink System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 Figure 2-11. Trigger Lever Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Figure 2-12. Pump Transmission Block Diagram . . . . . . . . . . . . . . . . . . . . 2-12 Figure 2-13. Trigger Lever Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Figure 2-14. Gear Transmission Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Figure 2-15. Pump Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 Figure 2-16. Capping Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 Figure 2-17. Wiping Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 Figure 2-18. Carriage Lock Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 Figure 2-19. Block Diagram of the Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 Figure 2-20. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . 2-18 Figure 2-21. Main Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . 2-20 Figure 2-22. Reset Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21 Figure 2-23. Sensor Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-22 Figure 2-24. Carriage Motor Drive Circuit Block Diagram. . . . . . . . . . . . . . 2-24 Figure 2-25. A2910 Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 Figure 2-26. PF Motor Drive Circuit Block Diagram. . . . . . . . . . . . . . . . . . . 2-25 Figure 2-27. Head Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-26 Figure 2-28. Head Drive Wave-form for Normal Printing. . . . . . . . . . . . . . . 2-26 Figure 2-29. Printhead Electrical Pole Configuration . . . . . . . . . . . . . . . . . 2-27
List of Tables
Table 2-1. Differences Between Stylus Color and Stylus Color IIs in Micro-Weave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Table 2-2. Carriage Drive Motor Specifications. . . . . . . . . . . . . . . . . . . . . . . 2-6 Table 2-3. Drive Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Table 2-4. Platen Gap Adjust Lever Position. . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Table 2-5. Paper Select Lever Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 Table 2-6. Paper Feed Drive Motor Specifications . . . . . . . . . . . . . . . . . . . 2-10 Table 2-7. Drive Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 Table 2-8. Pump Mechanism Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 Table 2-9. DC Voltage Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 Table 2-10. Motor Drive Method (Clockwize Direction) . . . . . . . . . . . . . . . 2-23 Table 2-11. Connection Between Input and Output Signals . . . . . . . . . . . 2-23 Table 2-12. Connection Between Current Value and Input Signals . . . . . 2-24 Table 2-13. Motor Drive Method (Clockwize Direction) . . . . . . . . . . . . . . . 2-25
2-ii
Rev. A
Rev. A
2-i
Stylus Color IIs / Stylus 820
Operating Principles
2.1 OVERVIEW
This section describes the operating principles for the printer mechanism and the circuits of the Stylus Color IIs.
2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM
The Stylus Color IIs printer mechanism is composed of the printhead unit, paper feed mechanism, carriage drive mechanism, pump mechanism, and various sensors. The figure below shows a functional block diagram of the printer mechanism.
Printhead Unit
Platen Drive Mechanism
Paper Pickup Mechanism
Pickup Trigger Lever
Engage Trigger Lever Pump Drive Mechanism
Paper Feed Motor
Carriage Motor
Figure 2-1. Printer Mechanism Block Diagram
Rev. A
2-1
Operating Principles
Stylus Color IIs / Stylus 820
2.2.1 Printer Mechanism
The printer mechanism for this printer uses a drop-on-demand ink jet system similar to the system used on all other EPSON ink jet printers. However, the printhead in this system has been completely redesigned to make it more compact and ensure a high level of reliability. The figure below shows the structure of the printhead and ink supply system. o o o Piezo Cavity Nozzles When a drive pulse (voltage) is applied, this element pushes the vibration plate, compressing the cavity for ink ejection from the nozzle. Ink supplied from the ink cartridge is stored in this space and is ejected from the nozzles when the vibration plate compresses this area. These eject ink against the paper's surface in response to the application of the print signal. There are 64 (black head) or 60 (color head) individual nozzles making up the printhead.
Sensor Actuator for Ink Cartridge Cartridge Needle
Head Drive Board
Head Cover
Ink Filter Ink Supply Tube
MLP Set Cavity Set Nozzle Plate
Figure 2-2. Structure of Print Head
2-2
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
Principles of the Printing Operation
The printhead operates in one of two modes to eject ink from each nozzle: o Normal state No electrical charge is applied to the MLP (Multi-Layer Piezoelectric) element attached to the back of the cavity, and pressure inside the cavity is kept at a constant level. Ejecting state
o
Nozzle Plate
Piezo
Cavity
Ink Course (Normal State) Nozzle
(Ejecting State)
Figure 2-3. Principles of the Printing Operation
The head data signal is applied to the specific nozzle control line to select the active nozzle for printing, and the MLP element is gradually charged by the drive voltage. By charging the MLP element, the vibration plate is bent to compress the cavity. Then, ink is ejected from the nozzle. When the ink charge or printhead cleaning operation is performed, the ink in the cavity is vacuumed out with the pump mechanism. During printing, on the other hand, ink is simultaneously supplied from the ink cartridge and ejected from the nozzle, depending on the change in the volume of the cavity. A thermistor is attached to the side of each printhead unit to monitor the temperature, because the viscosity of ink varies, depending on the temperature. The detected temperature level is fed back to the printhead drive voltage control circuit to change the timing of the Tc pulse.
Rev. A
2-3
Operating Principles
Stylus Color IIs / Stylus 820
2.2.2 Printing Operations
Micro Weave Mode The Stylus Color IIs printer has a special printing mode, called "Micro Weave Printing Mode," which can be selected from the custom printer driver. Using micro weave printing can improve the output quality, because it eliminates banding that can sometimes occur in normal mode. In micro weave mode, paper feed is performed after each print pass, eliminating pitch variations that cause the banding. The table below shows the differences between the Stylus Color printer and the Stylus Color IIs printer in the micro weave mode.
Table 2-1. Differences Between Stylus Color and Stylus Color IIs in Micro Weave Mode
Stylus Color o Using Nozzles Black Head: Only Row A (# 16 is not available.) Color Head: All Rows (# 16 is not available.) o Paper Feed Pitch 15/360 inch (in 360 dpi mode) 15/720 inch (in 720 dpi mode) Normal Mode Normal printing mode is used for the black head at 360 dpi resolution on the custom printer driver. This mode is specially designed to decrease banding lines when the printer uses black ink (a low-penetrable type). Stylus Color IIs o Using Nozzles Black Head: Only Row C and Row D (# 61 and # 64 nozzles not available.) Color Head: All Rows ) o Paper Feed Pitch 20/360 inch (in 360 dpi mode) 20/720 inch (in 720 dpi mode)
Vh
0.0435 ug
0.113 ug
Time
Figure 2-4. Dual Firing Method
2-4
Rev. A
Stylus Color IIs / Stylus 820
720 dpi Printing Mode
Operating Principles
The Stylus Color IIs has a special printing mode, called "720 dpi Printing Mode," which also can be selected from the custom printer driver. In this mode, the printer prints dots as follows:
1/360"
1/720" 1/360"
Figure 2-5. 720 dpi Printing for Stylus Color IIs
o Resolution in the horizontal direction: True 360 dpi o Resolution in the vertical direction: 720 dpi, staggered
Rev. A
2-5
Operating Principles
Stylus Color IIs / Stylus 820
2.2.3 Carriage Drive Mechanism
The timing belt attached to the base of the carriage unit is driven by the carriage motor, which moves the carriage unit along the carriage guide shaft left to right, or vice versa. The carriage motor for this printer is a 4-phase, 48-pole, hybrid-type stepping motor mechanism, allowing the printer to stop the carriage or change carriage movement in any position. The position of the carriage is recognized by the home position sensor, and position information is fed back to the carriage drive control circuit. This carriage motor is driven by motor driver IC A72919 (See Section 2.3.2.3 for more information).
Table 2-2. Carriage Drive Motor Specifications
Item Motor Type Drive Voltage Coil Resistance Drive Frequency Excitation Mode Description 4-phase / 48-pole hybrid-type stepping motor +42 VDC ± 5% 22.0 ± 7% 768 ~ 3264 PPS Constant current bi-polar drive, micro-step drive
Carriage Motor Carriage Guide Shaft Engage Off Lever
Paper Pickup Trigger
Engage On Lever Carriage Home Position Sensor
Figure 2-6. Carriage Mechanism
2-6
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
Table 2-3. Drive Terms
CR Speed (cps) SPD1 (170) SPD2 (125) SPD3 (20) SPD41 (20) SPD5 (40) SPD6 (40) SPD7 (40) Frequency (pps) 3264 2400 384 384 768 768 768 Phase Drive Method 1W1-2 phase 1W1-2 phase 1W1-2 phase 1W1-2 phase 1W1-2 phase 1W1-2 phase 1W1-2 phase Acceleration/ Deceleration Step 88 (22) 88 (22) 8 (2) 8 (2) 8 (2) 8 (2) 8 (2)
Note:
In the table above, 1 W1-2 phase means 1/4 2-2 phase drive control. Values in parentheses ( ) are for the 2-2 phase.
Rev. A
2-7
Operating Principles
Stylus Color IIs / Stylus 820
2.2.3.1 Platen Gap Adjust Lever
The platen gap adjust lever, which is attached to the left side of the printer mechanism, needs to be set to an appropriate position for the paper type. To change the platen gap (PG), put the printer in the pause state; then change the lever position from the <0> position to the <+> position.
Note:
If print quality is not a problem, you do not need to change the lever position even if the paper thickness is changed.
Table 2-4. Platen Gap Adjust Lever Position
Paper Type < 0 > position < + > position
<+> Position
Lever Position Horizontal (± 0 mm) Vertical
PG Lever <0> Position
(+ 0.62 mm)
0.1
Figure 2-7. PG Lever Operation
2-8
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
2.2.3.2 Paper Select Lever
The paper select lever, which is attached to the upper case, needs to be set to an appropriate position for paper-feed reliability. Change the paper select lever before transmitting data from the host computer.
Paper Select Lever
Manual Feed
Auto Feed
ASF Sensor
PE Sensor
Hopper
Paper In
Paper Out
Figure 2-8. Paper Select Lever
Note: q q This operation changes paper pickup speed with the trigger switch on the ASF sensor. 1224 pps 625 pps (Lever position: (Lever position: front) rear)
Thinner paper: Thicker paper:
The table below shows the connection between the paper used and the lever position.
Table 2-5. Paper Select Lever Position
Paper Type and Feed Method q Thinner paper, manual feed q Thinner paper, ASF feed q Thicker paper, manual feed q Thicker paper, ASF feed Lever Position Rear Front Rear Rear PF Speed (PPS) 1224 1224 1224 625
Rev. A
2-9
Operating Principles
Stylus Color IIs / Stylus 820
2.2.4 Paper Feed Mechanism
This printer's paper feed mechanism can feed paper only from the built-in ASF (auto sheet feeder). The paper feed drive motor is a 2-phase, 96-pole, hybrid-type stepping motor that directly drives the paper feed mechanism (paper advancing operation, paper pickup operation). This motor also drives the pump mechanism, but only when the printer is in the cleaning state. The paper feed drive method is driven by only the 2-2 phase drive method.
Table 2-6. Paper Feed Drive Motor Specification
Item Motor Type Drive Voltage Coil Resistance Drive Frequency Excitation Mode Description 2-phase, 96-pole, hybrid-type +42 VDC ± 5% 21 ± 1 500 ~ 1224 PPS Open loop: 2-2 phase
Table 2-7. Drive Terms
Control Mode Mode A Mode B Mode C Mode D Mode E Mode F Frequency (pps) 500 650 1224 1224 650 500 Drive Method 2-2 phase 2-2 phase 2-2 phase 2-2 phase 2-2 phase 2-2 phase Purpose PF (small steps) PF (color micro weave) PF ASF drive Pump drive Eliminates backlash
Pickup Roller Clutch
Pickup Trigger
Push the Hopper Edge
1
Pickup Trigger Pump On Trigger 2 3
Pickup Roller
4
Platen
5
Pump / PF Clutch
Figure 2-9. Paper Feed Mechanism
2-10
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
2.2.5 Ink System
This printer's ink system is composed of the following mechanisms: o Ink cartridge o Pump mechanism o Cap mechanism o Waste ink drain tank o Wiping mechanism o Carriage lock mechanism The figure below gives a diagram of the ink system.
Ink Cartridge
Printhead
Platen Roller Unit
Capping Unit Pump On Lever
Waste Ink Tube Pump Off Lever
PF (Pump) Motor
Pump Roller
Figure 2-10. Ink System Block Diagram
Rev. A
2-11
Operating Principles
Stylus Color IIs / Stylus 820
2.2.6 Pump Mechanism
The paper feed motor drives the pump mechanism when the transmission gear is moved to the position where the paper feed motor engages the pump mechanism gear trains, when the carriage unit is at the ink system home position. The figure below shows a block diagram of the pump mechanism.
Drive: Trigger Lever Set
Sus Plate Pump Off Trigger
Carriage Lever Pump On Trigger Sus Plate
Paper Pickup Trigger
Figure 2-11. Trigger Lever Set
Drive: Gear Transmission
1
3
2
4
5
Figure 2-12. Pump Transmission Block Diagram
2-12
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
Drive: Trigger Lever Reset
Sus Plate Pump Off Trigger
1
Carriage Lever
2
Paper Pickup Trigger
Pump On Trigger Sus Plate
Figure 2-13. Trigger Lever Reset
Drive: Gear Transmission
Pin
Return the pin to base position
2'
Pump Off Trigger
1
Pump On Trigger
3
2
To Pump Off State
Figure 2-14. Gear Transmission Diagram
Rev. A
2-13
Operating Principles
Stylus Color IIs / Stylus 820
Table 2-8. Pump Mechanism Operation
PF Motor Rotational Direction Clockwise (CW) Forward rotation Operation o Absorption o False absorption o Drive transmission change o o o o Absorption False absorption Cleaner set Drive transmission change
Counterclockwise (CCW) Backward rotation
The pump draws ink from the printhead nozzles and drains it to the waste ink drain tank. The printer performs this operation to eliminate dust or bubbles in the nozzles. Figure 2-11 illustrates pump operation. When the paper feed drive motor rotates CCW (backward), the pulley pumps in the wheel pump unit rotate in the direction of the arrow while squeezing the ink tube to push the ink inside the tube out to the waste ink drain tank.
No Ink Draining No Vacuuming
Pump Motor (CW): No Pumping
Ink Draining
Vacuuming
Pump Motor (CCW): Pumping
Figure 2-15. Pump Operation
2-14
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
2.2.7 Cap Mechanism
The cap mechanism prevents printhead nozzles from drying and keeps bubbles from forming inside the nozzles while the printer is not in use. The printer performs this operation automatically when print data is not received. (However, since the power switch is in the primary circuit, it does not allow auto capping when the user turns the printer off during printing.)
CR Hitting Flag
Cap
Air Valve
Air Tube
Hitting Flag
Waste Ink Drain Tank
Figure 2-16. Capping Operation 2.2.8 Wiping Mechanism
The wiping mechanism cleans the surface of the printhead nose when the printer is in the ink system sequence. The wiper drive lever transmits to the pump drive gear via the cam friction roller. A tension spring in the cam friction roller holds the suface of cam friction roller against the inside of the pump roller.
Lever Wiper Blade Internal Flag
Cam Friction Roller
Figure 2-17. Wiping Mechanism
Rev. A
2-15
Operating Principles
Stylus Color IIs / Stylus 820
2.2.9 Carriage Lock Mechanism
The carriage lock mechanism locks the carriage unit when the printer is in the pause state or while it is not used. The Stylus Color IIs does not use an exclusive mechanism as the carriage lock. (The carriage lock position is on the engage / disengage rail as shown in the figure below.)
Carriage Lock Position
Figure 2-18. Carriage Lock Mechanism
Note:
For servicing, it is very difficult to move the carriage unit to the carriage lock position manually. Therefore, it is necessary to turn the printer on, set the carriage unit to the lock position, and then turn the printer off.
2-16
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
2.3 OPERATING PRINCIPLES OF THE CIRCUITS
The Stylus Color IIs contains the following circuit board units: o o o C160 MAIN Board (main control circuit board) C160 PSB/PSE Board (power supply circuit board) C160 I/F (exclusive interface board)
In addition to the circuit boards above, part of the printhead drive circuit is built on a separate circuit board installed in the printhead unit; the printhead unit is attached directly to the carriage unit. The figure below shows a block diagram of the circuitry.
RCC Power Supply Board (C160 PSB Board) +5 VDC
Main Control Board (C160 MAIN Board) +5 VDC +42 VDC
+42 VDC 100 VAC
CR HP Sensor
CR Motor
PE Sensor PF MOTOR (Pump Motor) Thermistor
INK END Sensor (Firm Wear)
Power Drop Sensor
Mono./ Color Sensor
ASF Sensor No Head Sensor
Head Drive Voltage Select (3-bit ID Code) Printhead Head Drive Board
Figure 2-19. Block Diagram of the Circuits
Rev. A
2-17
Operating Principles
Stylus Color IIs / Stylus 820
2.3.1 Operating Principles of the Power Supply Circuit
The power supply circuitry for this printer is provided either by the C160 PSB Board (120 VAC) or the C160 PSE Board (220-240 VAC). Both boards are identical in design and functionality, except for components in the primary circuit that accommodate the specified input voltage. The application of output voltages is summarized in the table below.
Table 2-9. DC Voltage Distribution
Voltage +42 VDC Application Motor drive (carriage and paper feed / pump) Printhead (through the drive voltage generation circuit) C160 MAIN Board Sensors (home position, paper end, no ink cartridge, head thermistor, etc.) Control panel, head nozzle selector
+5 VDC
The figure below shows a block diagram of the power supply circuit (C160 PSB/PSE). As opposed to Stylus Color series printers, the power switch for the Stylus Color IIs is in the primary circuit. Therefore, if the user turns off the printer during printing, the carriage unit stops without capping the nozzles. Also, this board employs an RCC (ringing choke converter) switching system. This AC voltage is first input to the filter circuit for higher harmonics absorption, and then input to the rectification and smoothing circuit, converting it into a DC voltage. This DC voltage is then input to the switching circuit for the switching operation. Along with the switching operation on the primary side, +42 VDC is generated after passing through the +42 V line voltage-detection circuit. This +42 VDC output level is stabilized and also is input to the +5 VDC generation circuit (chopper IC) to generate a stable +5 VDC.
DB1 Full-wave Rectifier
L1, R1 C1-C4
C11 Smoothing Circuit Q1 Main SW Circuit Q2, Q3, IC1 Feedback Circuit T R A N S
T1 Smoothing Circuit C51
+42 V Constant Voltage Control Circuit +5 V Creation Circuit (IC51)
+42 VDC
Filter Circuit F1 Fuse
Over Current Protection Circuit
Q81, Q82
+5 VDC
+42 V Over Voltage Protection Circuit ZD52, ZD87 +5 V Over Voltage Protection Circuit ZD53, R81
Photocoupler PC1 Photocoupler PC2
Figure 2-20. Power Supply Circuit Block Diagram
2-18
Rev. A
Stylus Color IIs / Stylus 820
1. +5 VDC line over voltage protection circuit
Operating Principles
The output voltage level of +5 V line is monitored by Zener diode ZD53. If the voltage level exceeds +6 V, the status is fed back to the primary switching circuit through photocoupler PC1 to stop the +42 V generation. 2. +5 VDC line over voltage control circuit. The output current is monitored by a 2-pin detection port in IC51 and fed back to internal comparator; then the +5 VDC is generated. 3. +42 VDC line over voltage protection circuit The output level is monitored by Zener diodes ZD52 and ZD87. If the voltage level exceeds +48 V, photocoupler PC2 is activated; stopping primary switching circuit operation. 4. +42 VDC line constant voltage control circuit The output level of +42 VDC line is monitored by a detection circuit that consists of Zener diodes ZD51, 81, 82, 83, 84, 85, and 86. This circuit feeds back the output voltage level status through a photocoupler to the primary switching circuit to control the ON/OFF time of main switching FET Q1 for constant output voltage.
Rev. A
2-19
Operating Principles
Stylus Color IIs / Stylus 820
2.3.2 Operating Principles of the Main Control Circuit
The main control circuit for this printer is the C160 MAIN Board, which is controlled by the 16-bit CPU M3772 (IC2), running at 16 MHz. This CPU has a unique architecture capable of handling data on the data bus at either an 8-bit or 16-bit bus width. Because of this, a 16-bit or 8-bit data bus width-type ROM is used on this board, increasing the internal processing speed. Additionally, auto refresh for the 1M PS-RAM is controlled by custom gate array E05B08 ( IC1). Gate array E05B08 (IC1) manages printhead drive control, the parallel I/F, extension CG board, and the control panel. The gate array also manages the controls that create the 2-bit signal for the carriage or the paper feed motor. (The carriage and paper feed motors are controlled by current duty data with micro step control.) This board also is equipped with EEPROM 93C46 (IC10) to store certain parameters, such as the printer mechanism control parameters, default setting parameters, as well as the the value in the special counter used for printhead (ink management) protection. Because this control board has no lithium battery that allows the printer to keep track of the amount of time that has elapsed since it was last used, there is no power on cleaning operation for this printer.
PROM (4M) (IC3)
PS-RAM (1M) (IC4)
CG-RAM (16M) (IC5)
CG-ROM (8M) (IC6)
CG-ROM (16M) (IC7)
OE
OE CE RFRSH
OE
EEPROM
(IC10) 93C46
(IC9) M51955B
CPU M3772 (IC2)
E05B08 (IC1)
(IC13) PST592D Reset IC for Logic System
Reset IC for Power System
To B
CR/PF Drive Signal
C160 MAIN Control Board Head Common Driver and Nozzle Selector Circuit
Printhead Unit SED5629 (U1, U2) Mono 64 Nozzles CMY 60 Nozzles
From A
A2919 (IC12, 16)
From B
CR/PF Drive Circuit
Figure 2-21. Main Control Circuit Block Diagram
2-20
IEEE-1284 Centronics
Head Common Driver and Nozzle Selector
MACH Serial (Only JAPAN ver. )
Panel
To A
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
2.3.2.1 Reset Circuits
The C160 MAIN Board contains 2 reset circuits: the +5 V monitor reset circuit and the +42 V monitor reset circuit. The +5 V monitor reset circuit checks the voltage level of the +5 V line, using reset IC PST592D (IC13), and outputs a reset signal to the E05B08 gate array (IC1) when the voltage level drops below +4.2 V. The +42 V monitor reset circuit checks the voltage level of the +42 V line, using reset IC M51955B (IC9), and outputs a reset signal to the CPU. A reset signal is generated when the voltage level drops below +40 V, and this causes a non-maskable interrupt (NMI).
+5 V +42 V CPU (IC2) M51955B (IC9) 6 24 INT0
+5 V
36 PST592D (IC13)
RESET E05B08 (IC1)
1
153
RESET
PA8
Figrure 2-22. Reset Circuit Block Diagram
Rev. A
2-21
Operating Principles
Stylus Color IIs / Stylus 820
2.3.2.2 Sensor Circuits
The following sensor circuits enable the C162 MAIN Board to monitor printer mechanism status: HP sensor The photocoupler-type home position (HP) sensor is attached to the surface of the printer mechanism to detect the carriage home position. A LOW level signal indicates the carriage is in home position. A mechanical switch-type paper end (PE) sensor is built into the printer mechanism to determine whether there is paper in the printer or not. A LOW level signal indicates no paper is loaded. The cartridge out (CO) sensor is mechnical switch attached to the head unit. A thermistor is attached to the black or CMY printhead unit to monitor its temperature using the thermistor's resistance value (at 25° C or 77° F, approximately 10K ). The CPU changes the printhead drive signal's pulse width (PWM control) based on the temperature level. The circuit pattern is decided as follows: q Black head: LOW q CMY head: HIGH When the printhead is installed in the carriage unit, the control board recognizes the current head automatically. There are four ID ports in the head unit. When the printer is turned on, the control circuit decodes this ID data and outputs it automatically with the correct voltage. (During servicing, it is not necessary to install a resistor array onto the control board as with previous printers.) If the user changes the paper select lever to manual feed mode, the ASF sensor monitors this and changes the paper feed sequence.
IC2 (CPU: M3772) M/C CN4 19-pin CN4 18-pin 76 99 AN PORT 98 96 95 94 97 81 75 74 CN4 5-pin ID1 ID2 ID3 ID4
PE sensor
CO sensor, Thermistor
M/C sensor
ID sensor
ASF sensor
TH
CN4 6-pin
CN4 7-pin
Common Drive Circuit
CN4 10-pin
PE CN9 (1-Pin)
PE CN7 (1-Pin)
Figure 2-23. Sensor Circuit Block Diagram
2-22
CR HP CN8 (1-Pin)
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles
2.3.2.3 Carriage Motor Driver Circuit
Carriage motor driver IC A2919 (IC12) outputs a constant current to drive the carriage motor. Gate array E05B08 (IC1) decides the motor phase and speed, and then sends a signal to the carriage motor driver IC using a 2-bit signal transmission line. (In the Stylus Color printer, 4-bit serial data was transmitted from the gate array to the driver IC.) The carriage motor is controlled using a 1W1-2 phase method. 1W1-2 phase is 1/4 the 2-2 phase. (In the Stylus Color printer, the carriage motor was controlled using 2W1-2 phase.) The table below shows the motor drive method along with the micro steps.
Table 2-10. Motor Drive Method (Clockwise Direction)
Step 1 ^ ^ ^ 2 ^ ^ ^ 3 ^ ^ ^ 4 ^ ^ ^ Note: Phase A +2/3 +1/3 0 1/3 2/3 1 1 1 2/3 1/3 0 +1/3 +2/3 +1 +1 +1 Phase B +2/3 +1 +1 +1 +2/3 +1/3 0 1/3 2/3 1 1 1 2/3 1/3 0 +1/3
One feature of driver IC A2919 is that it can gain constant torque by small movements of the carriage motor if 1/3 × 1TRIP (TRIP = established current). Therefore, the driver sequence reflects that coefficient in the above table.
Also, the phase drive signal uses only two ports of IC A2919. The table below shows the connection between the input and output signals.
Table 2-11. Connection Between Input and Output Signals
Phase (Input Port) H L OUT A H L OUT B L H
Note:
As shown above, two output signals are decided by only one input signal.
Rev. A
2-23
Operating Principles
Stylus Color IIs / Stylus 820
The figure below shows a block diagram of the carriage motor, and the Table 2-12 lists the connection between current control value and output current.
+5 V IC1 (GA) VREF0 VREF1 VREF2 141 142 143
VREF1 VREF2
A2919
IC2 (CPU) P56 P57 10 9
3 PHASE2 11 PHASE1
I11
I01
I12
Phase A or /A Phase B or /B
BPTO0 BPTO1 BPTO2 BPT12
8 7 6 5
Figure 2-24. Carriage Motor Driver Circuit Block Diagram Table 2-12. Connection between Current Value and Input Signal
I01 (I02) L H L H I11 (I12) L L H H Output Current 1 TRIP (100%) 2/3 TRIP (67%) 1/3 TRIP (33%) 0 (0%)
The micro step method is performed by PWM control in the driver IC, as shown below.
`A -` -A B -B
Full Bridge Bi-poler Phase 1
Full Bridge Bi-poler Phase 2
PWM1
PWM2
I11
I01
I12
I02
I02
Vref Output Waveform
Frequency is decided by the external CR circuit.
Figure 2-25. A2919 Internal Block Diagram
2-24
Rev. A
Stylus Color IIs / Stylus 820
Operating Principles