Epson Stylus 1520 Service Manual

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EPSON

EPSON Stylus COLOR 1520

SERVICE MANUAL

COLOR INK JET PRINTER

SEIKO EPSON CORPORATION

4007394

NOTICE

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The contents of this manual are subjects to change without notice.

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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.

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The above notwithstanding SEIKO EPSON can assume no responsibility for an y e rrors 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 purposes only and may be trademarks or registered trademarks of their respective companies.

PRECAUTIONS

Precautionar y notations throughout the tex t are categorized rel ative t o 1) personal i njury and 2) damage to equipment.

WARNING

CAUTION

The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.

Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by WARNING Headings. Signals a precaution which, if ignored, could result in damage to equipment.

WARNING

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURES.

2. NO W ORK SHOULD BE PERFO RMED ON THE UNIT BY PERSONS UNF AMILIAR W ITH 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.

CAUTION

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY EPSON CERTIFIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VO LT AG E, 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 DI SCONNECTED FROM T HE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.

iii

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of Stylus COLOR 1520. The instruct ions and procedur es incl uded herei n are i ntended for the ex peri ence repai r tec hnic ian, and attention should be given to die precautions on the preceding page. The Chapters are organized as follows:

CHAPTER 1. GENERAL DESCRIPTION

Prov ides a general product ov erview, l ists specific ations, and illustrates the main components of the printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENT

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides EPSON-approved techniques for troubleshooting.

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.

REVISION SHEET

Revision

Rev. A

Rev. B MARCH 3 1997 Rev. C

Issued Data

FEBRUARY 25 1997

November 28, 1997

Contents

First issue

Second issue for Chapter 1

Addition of “4.1.9 Uni-D Adjustment”

CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENT CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX

Chapter 1

Product Description

1.1 Features................................................................................................................1-1

1.2 Specification.........................................................................................................1-3

1.2.1 Printing Specifications ..................................................................................................... 1-3

1.2.2 Control codes.................................................................................................................... 1-4

1.2.3 Character tables................................................................................................................ 1-4

1.2.4 Paper Feeding ................................................................................................................... 1-5

1.2.5 Paper Specification........................................................................................................... 1-6

1.2.5.1 Cut Sheet............................................................................................................. 1-6

1.2.5.2 Transparency........................................................................................................ 1-6

1.2.5.3 Envelope.............................................................................................................. 1-6

1.2.5.4 Index Card............................................................................................................ 1-6

1.2.5.5 Labels (Cut Sheet)................................................................................................ 1-7

1.2.5.6 Continuous Paper................................................................................................. 1-7

1.2.5.7 Labels (Continuous).............................................................................................. 1-7

1.2.5.8 Banner.................................................................................................................. 1-7

1.2.6 Printable Area.................................................................................................................... 1-8

1.2.7 Adjust Lever .....................................................................................................................1-11

1.2.8 Ink Specification...............................................................................................................1-12

1.2.8.1 Black ink cartridge...............................................................................................1-12

1.2.8.2 Color ink cartridge ...............................................................................................1-12

1.2.9 Input Data Buffer..............................................................................................................1-12

1.2.10 Electric Specifications...................................................................................................1-13

1.2.11 Environmental Conditions.............................................................................................1-13

1.2.12 Reliability........................................................................................................................1-14

1.2.13 Safety Approvals............................................................................................................1-14

1.2.14 CE Marking .....................................................................................................................1-14

1.2.15 Acoustic Noise ...............................................................................................................1-14

1.3 Interfaces............................................................................................................1-15

1.3.1 Parallel Interface...............................................................................................................1-15

1.3.1.1 Forward Channel Specifications ..........................................................................1-15

1.3.1.2 Reverse Channel Specifications..........................................................................1-17

1.3.2 Mac Serial Interface..........................................................................................................1-18

1.3.2.1 Serial Interface Specifications .............................................................................1-18

1.3.3 Optional Interface.............................................................................................................1-19

1.3.4 Prevention Hosts from Data Transfer Time-out..............................................................1-20

1.3.5 Interface Selection ...........................................................................................................1-20

1.3.6 Printer language and Control Codes ..............................................................................1-20

1.4 Operation............................................................................................................1-21

1.4.1 Control Panel....................................................................................................................1-21

1.4.2 Panel Functions at Power On..........................................................................................1-23

1.4.3 Printer Condition and Panel Status ................................................................................1-24

1.4.4 Cover Open Sensor Operation........................................................................................1-25

1.4.5 Default Setting..................................................................................................................1-25

1.4.5.1 Setting Method....................................................................................................1-25

1.4.5.2 Setting Menus .....................................................................................................1-27

1.4.6 Printer Adjustment Mode.................................................................................................1-29

1.4.6.1 Adjustment Method..............................................................................................1-29

1.4.6.2 Adjustment patterns.............................................................................................1-29

1.4.7 Printer Initialization..........................................................................................................1-30

1.4.8 Self-test Printing Mode....................................................................................................1-30

1.4.9 Hexadecimal Dump Function ..........................................................................................1-30

1.4.10 Monochrome Printing Mode..........................................................................................1-30

1.5 Physical Specification .......................................................................................1-31

1.6 Main Components ..............................................................................................1-32

1.6.1 C211 MAIN Board .............................................................................................................1-32

1.6.2 C172 PSB/PSE Board.......................................................................................................1-33

Product Description

1.1 Features

The EPSON Stylus COLOR 1520 is a business-use, high speed, and high-quality color ink jet printer. The main features of this printer are:

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High Speed Printing

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400 cps for LQ mode

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800 cps for draft mode

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High print quality for color graphics

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High Resolution :1440 (H) X 720 (V) dpi printing

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Colors :Cyan, Magenta, Yellow, Black

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Printing Method :Traditional and new micro weave printing

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Smaller dot diameter for image improvement

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Built-in auto sheet feeder with a wide availability and high capacity

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This printer holds :Envelope up to A2 size portrait

:100 cut sheets (55 g/‡u) :10 envelopes :50 transparency films :70 special paper

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Built-in 2 interfaces and 1 optional interface card

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Mac serial interface ( up to approximately 900 kbps)

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Bi-directional parallel interface (IEEE1284 level 1 device)

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Optional Type-B interface card

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4 scalable fonts and 5 LQ fonts

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Scalable fonts :Roman T, Sans Serif H, Roman, Sans Serif

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LQ fonts :Roman, Sans Serif, Courier, Prestige, Script

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Useful character tables :Italic, PC437, PC850, PC860, PC861, PC863, PC865, BRASCII,

Abicomp, Roman 8, ISO Latin 1 PC437 Greek, PC852, PC853, PC855, PC857, PC866, PC869, MOZOAWIA, Code MJK, ISO 8559-7, Latin 1T, Bulgaria, PC774, Estonia, ISO 8859-2, PC866 LAT

Rev. A

Figure 1-1. Exterior View of the EPSON Stylus COLOR 1520

1-1

EPSON Stylus COLOR 1520

Model Description

C82305/C82306 C82307/C82308 C82310 C82313 C82315 C82314 C82312 C82331 C82345 C83602

C83603/C83604

C83605/C83606

C811** S020108 Black ink cartridge S020089 Color ink cartridge S041059 / S041025 EPSON 360 dpi ink jet paper (A4) S041060 EPSON 360 dpi ink jet paper (Letter) S041065 EPSON 360 dpi ink jet paper (A3) S041066 EPSON 360 dpi ink jet paper (Super A3/B) S041061 / S041026 EPSON photo quality ink jet paper (A4) S041062 EPSON photo quality ink jet paper (Letter) S041067 EPSON photo quality ink jet paper (Legal) S041068 EPSON photo quality ink jet paper (A3) S041070 EPSON photo quality ink jet paper (B) S041069 EPSON photo quality ink jet paper (Super A3/B) S041054 EPSON photo quality ink jet card (A6) S041121 EPSON photo quality ink jet card (5 X 8 inch) S041122 EPSON photo quality ink jet card (8 X10 inch) S041071 EPSON photo quality glossy film (A4) S041072 EPSON photo quality glossy film (Letter) S041107 EPSON photo quality glossy film (A6) S041073 EPSON photo quality glossy film (A3) S041075 EPSON photo quality glossy film (B) S041074 EPSON photo quality glossy film (Super A3/B) S041126 EPSON photo quality glossy paper (A4) S041124 EPSON photo quality glossy paper (Letter) S041125 EPSON photo quality glossy paper (A3) S041123 EPSON photo quality glossy paper (A2) S041063 EPSON ink jet transparencies (A4) S041064 EPSON ink jet transparencies (Letter) S041106 EPSON photo quality self adhesive sheet (A4) S041103 EPSON 360 dpi ink jet banner paper S041102 EPSON photo quality banner paper S041*** EPSON ink jet canvas S041*** EPSON back light film (A3) S041*** EPSON back light film (A2)

       

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Note) The asterisk is a substitute for the last digit of the product number,

which varies by country.

Table 1-1. Options and Consumables

Serial interface card

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32 KB serial interface card

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32 KB parallel interface card 32 KB EEE-488 interface card Twinax interface card Coax interface card LocalTalk™ interface card Ethernet interface card Type-B Bidirectional parallel interface card Parallel interface cable (shielded)

from D-SUB 25-pin (computer) to Amphenol 57 (printer) Serial interface cable

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from D-SUB 25-pin (computer) to D-SUB 25-pin (printer) Serial interface cable

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from D-SUB 9-pin (computer) to D-SUB 25-pin (printer) Banner paper holder and cutting guide

Rev. A

1.2 Specification

This section provides detailed information on the EPSON Stylus COLOR 1520.

1.2.1 Printing Specifications

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Printing method :On demand Ink jet

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Nozzle configuration :Monochrome 128 nozzles (32 x 4 staggered)

:Color 64 nozzles each (magenta, cyan, yellow)

320/360 inch

32/360 inch

144/360 inch

#127#128

32/360 inch

#125#126

32/360 inch

#64

144/360 inch

#63

32/360 inch

144/360 inch

#64

32/360 inch

#63

Product Description

#64

#63

#2 #3#4#1

Black

Paper feed direction

Cyan

Magenta

Figure 1-2. Nozzle Configuration

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Printing direction :Bi-directional with logic-seeking

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Printing speed and Printable columns

Table 1-2. Print Speed and Printable Columns for Character Mode

Character Pitch Printable Columns LQ Speed Draft Speed

10 cpi (Pica) 136 400 cps 800 cps 12 cpi (Elite) 163 480 cps 960 cps 15 cpi 204 600 cps 1200 cps

17.1 cpi(Pica condensed) 233 684 cps 1378 cps 20 cpi(Elite dondensed) 272 800 cps 1600 cps

Table 1-3. Print Speed and Printable Columns for Raster Graphic Mode

Print Mode Printable Area Available Dot CR Speed

180 dpi X 180 dpi 11 inch 1980 40 ips 360 dpi X 360 dpi 11 inch 3960 20 ips 720 dpi X 720 dpi 11 inch 7920 20 ips 1440 dpi X 1440 dpi *

11 inch

7920 *

Note) 1: 1440 dpi X 720 dpi is available when using driver micro weave only.

2: 1440 dpi X 720 dpi can be printed by sending Following command sequence.

1. Set the print speed to 10 IPS.

2. Print 180 X 720 raster image.

3. Paper feed 31/720 inch.

4. Move 1/1440 inch print position.

5. Print 180 X 720 raster image.

6. Paper feed 31/720 inch.

Repeat the steps from 2 to 6.

Yellow

10 ips

Rev. A

EPSON Stylus COLOR 1520

1.2.2 Control codes

ESCP/2 and expanded raster graphics code EPSON Remote command IBMX24E emulation

1.2.3 Character tables

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Legal and 14 international character sets

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Standard version: 27 character tables

Italic table PC 437 (US, Standard Europe) PC 850 (Multilingual) PC 860 (Portuguese) PC 861 (IceLandic) PC 863 (Canadian-French) PC 865 (Nordic) Abicomp BRASCII Roman 8 ISO Latin 1 PC 437 (Greek) PC 852 (East Europe) PC 853 (Turkish) PC 855 (Cyrillic) PC 857 ( Turkish) PC 866 (Russian) PC 869 (Greek) MOZOAWIA (Poland) Code MJK (CSFR) ISO 8559-7 (Latin, Greek) ISO Latin 1T (Turkish) Bulgaria (Bulgaria) PC 774 Estonia ISO 8859-2 (ISO Latin 2) PC 866 LAT

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Typeface

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Bit map LQ font EPSON Roman 10 cpi, 12 cpi, 15 cpi, Proportional

EPSON Sans Serif 10 cpi, 12 cpi, 15 cpi, Proportional EPSON Courier 10 cpi, 12 cpi, 15 cpi, EPSON Prestige 10 cpi, 12 cpi, 15 cpi,

EPSON Prestige 10 cpi, 12 cpi, 15 cpi

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Scalable font EPSON Roman 10.5 pt., 8 pt.  32 pt. (every 2 pt.)

EPSON Sans Serif 10.5 pt., 8 pt.  32 pt. (every 2 pt.) EPSON Courier 10.5 pt., 8 pt.  32 pt. (every 2 pt.) EPSON Prestige 10.5 pt., 8 pt.  32 pt. (every 2 pt.) EPSON Script 10.5 pt., 8 pt.  32 pt. (every 2 pt.)

Note) Each typeface has 4 variations:

Normal, Bold, Italic, and Bold Italic

An example of variations for Epson Roman is as follows:

Epson Roman normal Epsom Roman bold Epson Roman italic Epson Roman bold italic

Rev. A

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Combinations of Character tables and typefaces (font) Table 1-14 shows the available combinations of character tables and Typefaces.

Table 1-4. Character Tables and Fonts

Bitmap Fonts Scalable Fonts Scalable Fonts

Character Tables

Italic PC 860 (Portuguese)) PC 861 (IceLandic) PC 863 (Canadian-French) PC 865 (Nordic) BRASCII Abicomp Roman 8 ISO Latin 1 Italic table PC 437 (US Standard Europe) PC 850 (Multilingual) PC 437 (Greek) PC 852 (East Europe) PC 853 (Turkish) PC 855 (Cyrillic) PC 857 (Turkish) PC 866 (Russian) PC 869 (Greek) MAZOWIA (Poland) Code MJK (CSFR) ISO 8859-7 (Latin/Greek) ISO Latin 1T (Turkish) Bulgaria (Bulgaria) PC 774 Estonia ISO 8859-2 (ISO Latin 2) PC 866 LAT

EPSON Roman EPSON Sans Serif EPSON Courier EPSON Prestige EPSON Script

Supported Supported Supported

Supported Supported

EPSON Roman EPSON Sans Serif

Product Description

EPSON Roman T EPSON Sans Serif H

Not

Supported

1.2.4 Paper Feeding

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Paper transport method :Friction feed with built-in auto sheet feeder (ASF)

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Line spacing :1/6, 1/8 inch or programmable at 1/360 inch

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Paper path :Cut-sheet ASF (Front entry)

:FF Rear tractor

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Feed speed :66 ms / line (1 line = 1/6 inch)

88.9 mm / sec

3.5 inch / sec

Rev. A

EPSON Stylus COLOR 1520

1.2.5 Paper Specification

1.2.5.1 Cut Sheet

Table 1-5. Cut Sheet Size

Size Width Length

A4 210 mm (8.3”) 297 mm (11.7”) Letter 215.9 mm (8.5”) 279.4 mm (11.0”) B5 182 mm (7.2”) 257 mm (10.1”) Legal 215.4 mm (8.5”) 355.6 mm (14.3”) B4 257 mm (10.1”) 364 mm (14.0”) A3 297 mm (11.7”) 420 mm (16.5”) Ledger 279.4mm (11.0”) 431.8 mm (17.0”) A3 wide 329 mm (13.0”) 483 mm (19.0”) A2 420 mm (16.5”) 594 mm (23.4”) US-C 431.8 mm (17.0”) 558.8 mm (22.0”) B5 (ISO) 176 mm (6.9”) 250 mm (9.8”) B4 (ISO) 250 mm (9.8”) 353 mm (13.9)”

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Paper Thickness :0.065 mm (0.0025”) to 0.11 mm (0.004”)

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Paper Weight :64 g/ m

:52 g/ m

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Quality :Exclusive paper *

Note) 1. A2 portrait and US-C portrait are used by manual insertion only.

2. Be sure to use the designated side of exclusive paper.

(17 lb.) to 90 g/ m2 (24 lb.) (ASF)

(14 lb.) to 90 g/ m2 (24 lb.) (Manual insertion)

, Bond paper, PPC

1.2.5.2 Transparency

Table 1-6. Transparency Size

Size Width Length

A4 210 mm (8.3”) 297 mm (11.7”) Letter 215.9 mm (8.5”) 279.4 mm (11.0”)

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Paper thickness :0.075 mm (0.003”) to 0.085 mm (0.0033”)

Note) Transparency printing is only available at normal temperatures.

Transparency paper must be printed on the designated side.

1.2.5.3 Envelope

Table 1-7. Envelope Size

Size Width Length

No.10 241.3 mm (9 1/2”) 104.8 mm (4 1/8”) DL 220 mm (8.7”) 110 mm (4.3) C5 229 mm (9”) 162 mm (6.4)

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Paper Thickness :0.16 mm (0.006”) to 0.52 mm (0.02”)

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Paper Weight :45 g/m

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Quality :Bond paper, Plain paper, Air mail

Note) Envelope printing is only available at normal temperatures.

Place the longer side of the envelope horizontally when setting.

(12 lb.) to 90 g/ m2 (24 lb.)

1.2.5.4 Index Card

Table 1-8. Index Card Size

Size Width Length

A6 index card 105 mm (4.1”) 148 mm (5.82”)

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Card Thickness :0.23 mm (0.0091”)

Rev. A

Product Description

1.2.5.5 Labels (Cut Sheet)

Table 1-9. Label Size

Size Width Length

A4 210 mm (8.3”) 297 mm (11.7”)

Letter 216 mm(8.5”) 279 mm (11.0”)

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Paper thickness :0.2 mm (0.0079”) including base sheet

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Quality :Page printer label

Note) Label must be printed at normal room temperature.

1.2.5.6 Continuous Paper

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Paper size :Paper width 101.6 mm (4”) to 406.4 mm (16”)

:Folding length 101.6 mm (4”)

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Paper thickness :0.065 mm (0.0026”) to 0.11 mm (0.0043”)

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Paper Weight :52 g/ m

(14 lb.) to 82 g/ m2 (22 lb.)

1.2.5.7 Labels (Continuous)

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Paper size

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Base sheet :Paper width 101.6 mm (4”) to 406.4 mm (16”)

:Folding length 101.6 mm (4”)

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Label :Width 63.5 mm (2.5”)

:Length 23.9 mm (0.94”)

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Paper thickness :0.2 mm (0.0079”) or less including base sheet

:0.12 mm (0.0047”) or less without base sheet

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Quality :Plain paper

Note) Label (continuous) must be printed under normal room temperatures.

1.2.5.8 Banner

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Size :Width :210 mm (8.32) to 432 mm (17.0”)

:Length :5.0 m or less (196.9”)

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Thickness :0.08 mm (0.0031”) to 0.1 mm (0.0039”)

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Weight :64 g/m

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Quality :Plain paper

(17 lb.) to 82 g/ m2 (22 lb.)

Rev. A

EPSON Stylus COLOR 1520

1.2.6 Printable Area

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Cut Sheet

LM RM

Printable Area

Figure 1-3. Printable Area for Cut Sheet

Table 1-10. Minimum Margins for Different Cut Sheet Sizes

PW LM (Left Margin) RM (Right Margin) TM BM

(Paper

Width)

297 mm

Set to right

edge

3 mm

(0.12”)

Set to left

edge

3 mm

(0.12”)

Set to right

edge

3 mm

(0.12”)

Set to left

edge

3 mm

(0.12”)

(Top Margin) (Bottom

3 mm

(0.12”)

(11.87”)

Legal (L)

356 mm

3 mm

(0.12”)

5 mm

(0.20”)

5mm

(0.20”)

3 mm

(0.12”)

3 mm

(0.12”)

(14.0”)

B4 (L)

364mm

3 mm

(0.12”)

16 mm

(0.51”)

16 mm

(0.51”)

3 mm

(0.12”)

3 mm

(0.12”)

(14.3”)

A3 (L)

420 mm

13 mm

(0.51”)

25 mm

(0.98”)

62 mm

(2.32”)

50 mm (1.85”)

3 mm

(0.12”)

(16.5”)

Ledger (L)

432 mm

25 mm

(0.98”)

25 mm

(0.98”)

62 mm

(2.32”)

62 mm (2.32”)

3 mm

(0.12”)

(17.0”)

Note) 1. (L) : When the paper is placed in landscape orientation.

2. Printable are of label (cut sheet) is as same as cut sheet.

Margin)

14 mm

(0.54”)

14 mm

(0.54”)

14 mm

(0.54”)

14 mm

(0.54”)

14 mm

(0.54”)

Rev. A

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Envelope

Product Description

LM (Left Margin)

(minimum)

3 mm

(0.12”)

Printable area

Figure 1-4. Printable Area for Envelopes

Table 1-11. Minimum Margin for Envelope

RM (Right Margin)

(minimum)

3 mm

(0.12”)

TM (Top Margin)

(minimum)

3 mm

(0.12”)

(Bottom Margin)

(minimum)

14 mm (0.55”)

Rev. A

EPSON Stylus COLOR 1520



Continuous Paper

Note) 1. Printable area of label (continuous) is as same as for continuous paper.

2. Base sheet of label (continuous) is not within the printing area.

More than

3 mm (0.12 ")

Perforation

More than

13 mm (0.51") *1

Printable are 1

Printable area 2

Printable are 1

Printable area 2

Printable are 1

More than

13 mm (0.51") *1

More than

12.5 mm (0.49")

More than 9 mm (0.35") More than 9 mm (0.35")

More than 14 mm (0.55")

*1 : When the paper width is more than 406.4 mm (16"), this width is more than 38 mm (1.50").

Printable area 2

Printable are 1

Perforation

Printable Area 1: Paper feed pitch is not guaranteed in this area.

Printable Area 2: Paper feed pitch is guaranteed in this area.

Perforation

Figure 1-5. Printable Area for Continuous Paper

More than 134 mm (5.28")

1-1

Rev. A

Product Description

1.2.7 Adjust Lever

The adjust lever , located at the left and upper side of the printer , is used to adjust the gap between the paper and platen. The adjust lever must be set to the proper position the paper type in order to prevent the paper from smudging.

Table 1-12. Adjust Lever Position

Paper

Type

Cut sheet Transparency Continuous paper Index card Envelopes Near side (+) + 0.7 mm

Lever

Position

Far side (0) 0 mm

Platen Gap Adjustment

Value

Adjust lever

Figure 1-6. Adjust Lever Settings

Rev. A

1-11

EPSON Stylus COLOR 1520

1.2.8 Ink Specification

1.2.8.1 Black ink cartridge

Table 1-13. Black Ink Cartridge Specifications

Black Ink Cartridge

Type Exclusive ink cartridge Color Black Print capacity 900 pages / A4 (ISO/IEC10561 Letter Pattern at 360 dpi) Ink life 2 years from indicated production date Storage Temperature

At storage : -20 •• to 40 •• At packing storage : -30 •• to 40 •• At transit (Packed) : -30 •• to 60 ••

Dimension 30 mm (W) X 58 mm (D) X 38.5 mm (H)

(1.22” X 2.36” X 1.57”)

*1 : Within a month at 40 •• *2 : Within 120 hours at 60 •• for more than 120 hours.

1.2.8.2 Color ink cartridge

Table 1-14. Color Ink Cartridge Specifications

Color Ink Cartridge

Type Exclusive ink cartridge Color Magenta, Cyan, Yellow Print capacity 300 pages A4 (at 360 dpi, 5 % duty each color) Ink life 2 years from indicated production date Storage Temperature

Dimension 42.9 mm (W) X 56.5 mm (D) X 38.5 mm (H)

*1 : Within a month at 40 •• for more than a month. *2 : Within 120 hours at 60 •• for more than 120 hours.

Note)

1. The cartridge must not be refilled. Only ink cartridge is prepared for article of consumption.

2. Do not used the cartridge that has exceeded the ink life.

3. When the ink is frozen under -4 before using.

At storage : -20 •• to 40 •• At packing storage : -30 •• to 40 •• At transit (Packed) : -30 •• to 60 ••

(1.75”X 2.30” X 1.57”)



C, leave it for more than 3 hours at the room temperature to defrost

* 1 * 1 * 1 *2

1.2.9 Input Data Buffer



Input data buffer :64 Kbytes

1-1

Rev. A

1.2.10 Electric Specifications



120 V version



Rated voltage :AC 120 V



Input voltage range :AC 103.5 to 132 V



Rated frequency renege :50 to 60 Hz



Input frequency range :49.5 to 60.5 Hz



Rated current :0.7 A (maximum)



Power consumption :Approximately 21 W (ISO/IEC 10561 Letter pattern)

Conforms to Energy Star program



Insulation resistance :10 M ohms min. (Between AC line and chassis, DC 500 V))



Dielectric strength :AC 1,000 V rms. (1 minute) or AC 1,200 V rms. (1 second)

(Between AC line and chassis)



220 - 240V version



Rated voltage :AC 220 to 240 V



Input voltage range :AC 198 to 264 V



Rated frequency renege :50 to 60 Hz



Input frequency range :49.5 to 60.5 Hz



Rated current :0.4 A (maximum)



Power consumption :Approximately 21 W (ISO/IEC 10561 Letter pattern)

Conforms to Energy Star program



Insulation resistance :10 M ohms min. (Between AC line and chassis, DC 500 V)



Dielectric strength :AC 1,500 Vrms. (1 minute) (Between AC line and chassis)

Product Description

1.2.11 Environmental Conditions



Temperature



Operating*



Non operating*



Humidity



Operating*



Non operating*



Resistance to vibration



Operating :0.15 G



Non-operating*



Resistance to shock



Operating :1 G within 1 ms



Non-operating*

*1 :Refer to the table below for guaranteed range. *2 :In shipment container. *3 :Without condensation

Humidity (%)

:10•• to 35•• :-20•• to 40•• ( 1 month at 40••)

-20•• to 60•• (120 hours at 60••) :20% to 80% RH (without condensation)

:5% to 85% RH (without condensation)

:0.50 G

:2 G within 2 ms

10 20

(50 H)

(80 H)

(95 H)

Temperature ( )

Figure 1-7. Environmental Conditions

Rev. A

1-1

EPSON Stylus COLOR 1520

1.2.12 Reliability



Total print volume :75,000 pages (A4/Lletter)



Print head life :2,000 million dots /nozzle

1.2.13 Safety Approvals



120 V version



Safety standards :UL1950 with D3

CSA22.2 No. 950 with D3



EMI :FCC part15 subpart B class B



220 - 240 V version



Safety standards :EN 60950 (TÜV, NEMKO)



EMI :EN 55022 (CISPR Pub.22) class B

:AS/NZS 3548 class B)

1.2.14 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

1.2.15 Acoustic Noise



Noise level :Approximately 45 dB (A) (According to ISO 7779)

1-1

Rev. A

Product Description

1.3 Interfaces

1.3.1 Parallel Interface

1.3.1.1 Forward Channel Specifications



Transmission mode :8 bit parallel , IEEE-P1284 compatibility mode



Synchronization :/STROBE pulse



Handshaking :BUSY and /ACKNLG signal



Signal level :TTL compatible level (IEEE-P1284 Level 1 device)

Table 1-15. Signal level of TTL Compatible (IEEE-1284 level 1 device)

Parameter Minimum Maximum Condition

VOH* - 5.5 V

VOL* -0.5 V -

IOH* - 0.32 mA VOH = 2.4 V

IOL* - 12 mA VOL = 0.4 V

CO - 50 pf

VIH - 2.0 V

VIL 0.8 V -

IIH - 0.32 mA VIH = 2.0 V

IIL - 12 mA VIL = 0.8 V CI - 60 pf

Note) * : A low logic level on the Logic H signal is as follows:

2.0 V or less when the printer is powered off.

3.0 V or more when the printer is powered on. The receiver shall provide an impedance equivalent to 7.5 K ohm top ground.



Adaptable connector :57-30360 (Amphenol) or equivalent The BUSY signal is set high before setting either /ERROR low or PE high and held high until all these signals return to the inactive state. The BUSY signal is at high level in the following cases:



During data entry (see Figure 1-8. Data Transmission Timing below.)



When the input data buffer is full



While /INIT signal is at low level or during hardware initialization



During a printer error condition (See /ERROR signal)



During test printing



When the printer is in default setting mode



When the parallel interface is not selected

The ERROR signal is at low level when one of the following errors has occurred:



Printer hardware error (fatal error)



Paper-out error



Paper-jam error



Ink-out error

The PE signal is high level during paper-out error.

DATA

STORBE

0.5 us (min.)

BUSY

ACKNLG

DATA (n)

0.5 us (min.)

0 (min.)

DATA (n+1)

0 (min.)

5 us (type.)

Figure 1-8. Data Transmission Timing

Rev. A

1-1

EPSON Stylus COLOR 1520

Table 1-16 shows the connector pin assignment and signals for forward channel of the parallel interface.

Table 1-16. Data Transmission Timing

Parameter Minimum Maximum

tsetup 500 ns -

thold 500 ns -

tstb 500 ns -

tready 0 -

tbusy - 500 ns

tt-out* - 120 ns

tt-in** - 200 ns treply - -

tack 500 ns 10 us

tnbusy 0 -

tnext 0 -

Note) * : Rises and falls in time of every output signals.

**: Rises and falls in time of every input signal.

Table 1-17. Connector Pin Assignments and Signals (Forward Channel)

Pin No. Signal Name Return

GND Pin

1 /STROBE 19 I

2-9 DATA 0-9 20-27 I

10 /ACKNLG 28 O This signal is a negative pulse indicating

11 BUSY 29 O When this signal is at high level, the

12 PE 28 O When this sign is at high level, the paper

13 SLCT 28 O Always at high level when the printer is

14 /AFXT 30 I Not used.

31 /INIT 30 I The falling edge of a negative pulse or a

32 /ERROR 29 O When the printer detects an error, this

36 /SLIN 30 I Not used.

18 Logic H - O Pulled up to +5V via 3.9 K ohm resistor.

35 +5V - O Pulled up to +5V via 3.3 K ohm resistor.

17 Chassis GND - - Chassis ground.

16,33,19-30 GND - - Signal ground.

15,34 NC - - Not connected.

I/O Description

The strobe pulse. Read-in of data is performed at the falling edge of this pulse. The data 0 to data 7 signals represent data bits 0 to 7, respectively. Each signal is at high level when data is logical 1 and low level when data is logical 0.

that the printer can again accept data. printer is not ready to accept data. empty status is detected. powered on.

low signal on this line causes the printer to initialize. Minimum 50 us pulse is necessary.

signal goes low.

Note) 1. */* at the beginning of a signal means active low.

2. The I/O column indicates the diction of the signal as viewed form the printer.

1-1

Rev. A

Product Description

1.3.1.2 Reverse Channel Specifications



Transmission mode :IEEE-1284 nibble mode



Adaptable connector :Same as for the forward channel



Synchronization :Refer to the IEEE-1284 specification



Handshaking :Refer to the IEEE-1284 specification



Data transmission timing :Refer to the IEEE-1284 specification



Signal level :IEEE-1284 level 1 device

See the forward channel specification.

Table 1-18 shows the connector pin assignment and signals for reverse channel of the parallel interface.

Table 1-18. Connector Pin Assignment and Signals (Reverse Channel)

Pin No. Signal Name Return

GND Pin

1 HostClk 19 I Clock signal from the host computer.

2-9 DATA 0-7 20-27 I These signals represent parallel data

10 PtrClk 28 O Clock signal from the printer 11 PtrBusy /

Data bits 3,7

12 AckDatareq /

AckData Bits 2,6

13 Xflag/Data bit 1,5 28 O X flag signal. 14 HostBusy 30 I Busy signal from the host computer

31 /INIT 30 I Not used 32 /Data Avail /

Data bits 0,4 36 1284-Active 30 I 1284 active signal. 18 Logic-H - O Pulled up to +5V via 3.9 K ohm resistor. 35 +5V - O Pulled up to +5V via 3.3 K ohm resistor. 17 Chassis GND - - Chassis ground for the printer.

16,33,19-30 GND - - Signalground.

15,34 NC - - Not connected.

29 O Busy signal from the printer. 28 O Acknowledge request signal.

29 O Data available signal.

I/O Description

information on bits 2 to 9.Each signal is High when the data is logical 1 and low when the data is logical 0.

Data bit 3 or 7 in reverse channel. Data bit 2 or 6 in reverse channel. Data bit 1 or 5 in reverse channel.

Data bit 0 or 4 in reverse channel.

Note) The symbol */* at the beginning of a signal means active low.



Extensibility Request The printer responds affirmatively when the extensibility request values are 00H or 04H, as follows:

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.

[00H] [xxH] MFG :EPSON; CMD :ESCP2E, PRPXL; MDL :Stylus COLOR 1520; CLS :PRINTER

Note) [00H] denotes a hexadecimal values of zero.

Rev. A

1-1

EPSON Stylus COLOR 1520

1.3.2 Mac Serial Interface

1.3.2.1 Serial Interface Specifications



Standard :RS-423 compliance



Synchronization :Synchronous



Bit rate :Approximately 900 Kbps, 1.8 Mbps



Word format :Start bit 1 bit

:Data bit 8 bit

:Parity bit No parity bit :Stop bit 1 bit



Handshaking :X-ON/XOFF, DTR protocol



Adaptable connector :8-pin mini circular connector



Recommended I/F cable :Apple System Peripheral-8 cable

Table 1-19. Connector Pin Assignment for Serial Interface

Pin No. Signal Name I/O Function Description

1 SCLK O Synchronous clock 2 CTS I Clear to send 3 TxD- O Transmit data 4 S.G. I Signal Ground 5 RxD- I Receive data 6 TxD+ O Balanced Transmit + 7 DTR O Data terminal ready 8 RxD+ I Balanced Receive +

Figure 1-9.

Serial Interface Connector Pin Assignment

Table 1-20. X-ON/X-OFF, DTR Protocol

State Buffer space X-ON/X-OFF DTR

Busy Less than 1024 bytes Send X-OFF code Off

Ready More than 2048 bytes Send X-ON code On

1-1

Rev. A

Product Description

1.3.3 Optional Interface

The EPSON Stylus COLOR 1520 supports an optional Type-B interface (Level 2) with the following characteristics.



Reply message



When ESC/P2 is selected:

Main type :MTP48p, PW136cl10cpi, PRG(W0xxxx)rev, AP800ma, SPD0fast Product name :Stylus COLOR 1520 Emulation type :ESCPL2-00 Entity type :EPSONLQ2



When X24E is selected:

Main type :MTP48p, PW136cl10cpi, PRG(W0xxxx)rev, AP800ma, SPD0fast Product name :Stylus COLOR 1520 Emulation type :PRPXL24-00 Entity type :EPSONPRPXL24

Table 1-21.Reply for Option Command

Option command No. command name Reply-A Reply-B

00h No Operation Accept None 01h Start Hard Ware Reset Accept Excute OK 02h Start Soft Ware Reset Reject 03h Send Main System Type Accept 04h Send Name Data Reject 05h Inquire Name Data Accept 06h Send Product Name Accept 07h Send Soft Ware Emulation Type Accept 08h Complete Buffered Data Accept Check Condition 09h Stop Procedure Reject Execute OK 0Ah Return Buffered Data Reject 0Bh Send Entity Type Accept 0Ch Send Status Accept 0Dh Quit Procedure Reject 0Eh Inquire ASCII Message Reject 0Fh Send ASCII Message Accept None

10h - 13h Unknown None

14h Inquire Emergency Message Accept Execute OK

15h Send Emergency message Accept 16h - 1Fh Unknown None 20h - FFh Reserved None

Table 1-22. Supported Main Command and Sending Timing

Main Command No. Command name Sending Timing

01h Start Software Reset

04h Send Name Data 07h Inquire Software Emulation Name

0Eh Inquire ASCII Message

14h Inquire Emergency Reply 15h Send Emergency Message



Emergency Command

0X00 :Get device ID 0X01 :Get all status



Sending BDC-ST through DBIN register When State-Reply is set “ON”, by ST from Type-B I/F, sending BDC-ST through DBIN register is started. When State-Reply is started, “Start” and “End” of BDC-ST characters are announced by sending the Main command 0Eh.

Rev. A



/INIT signal on the std. parallel I/F



Type-B I/F option command : 01h



Cold Start



Type-B I/F command : 05h



Changing software Emulation Type



Writing to DBIN register



Reply for Emergency command



Receive Emergency Command

1-1

EPSON Stylus COLOR 1520

1.3.4 Prevention 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 par minute, even the printer is in busy state. This slowdown starts when the rest of input buffer drops under several hundreds of bytes. Finally, the printer is in the busy state continuously when the input buffer is full.

1.3.5 Interface Selection

The EPSON Stylus COLOR 1520 has three types of interface available :Parallel, Serial, and optional interfaces. Each interface can be selected manually or automatically. Both modes are selected thorough the default setting mode.



Manual selection The interface selected through the default setting mode always prints out data from the host.



Automatic selection

When the printer is in this mode, the printer is initialized to the idle state when it is turned on. Then the interface that receives data first will print. When the host stops data transfer and the printer is in the stand-by state for the specific time, the printer returns to the idle state. As long as the host sends data or the printer interface is buy state, the selected interface remains active.

Interface State and Interface Selection

When the parallel interface is not selected, the interface goes into the busy state. When the serial interface is not selected, the interface sets the DTR signal MARK. When the printer is initialized or returned to the idle state, the parallel interface goes into the ready state and the serial interface sets the DTR signal SPACE. Caution that the interrupt signal such as the /INIT signal on the parallel interface is not effective while that interface is not selected.

1.3.6 Printer language and Control Codes



Printer languages and control codes :ESC/PC

:IBM X24E :EPSON Remote

1-2

Rev. A

Product Description

1.4 Operation

This section describes the controls, settings and adjustment used to operate the EPSON Stylus COLOR

1520.

1.4.1 Control Panel

The control panel of this printer consists of 6 non-lock push switches, 1 lock type push switch, and 6 LED indicators for easy operation of the various printer functions. Refer to Figure 1-10 for button and LEDs descriptions and how they are arranged.

(1)

(2)

(3)

(4)

(5)

(6)



Indicators (1) Cover Open (2) Operate (3) Ink Out (Black) (4) Ink Out (Color) (5) Paper Out (6) Pause

5sec

Reset

Operate

Cover Open

Micro Feed

Ink Out

Paper Out

Micro Feed

Figure 1-10. Control Panel Appearance

Alt

LF/FF

Cleaning

Load/Eject

Cleaning

Rev. A

1-21

EPSON Stylus COLOR 1520



Panel Functions :The function of each button is described below.



Power

Function :Turns the printer off or on * Available condition :Always



Load/Eject



LF/FF



Pause



Micro-adjust



Micro-adjust



Cleaning (Black)

Function :Loads and ejects the paper. Available condition :Pause/Stand-by

Function :Feeds one line or page. Available conditions :Pause / Stand-by

Function :Alternates the printer state between printing and non-

printing.

Available conditions :Pause / Stand-by Function : Pressing this button for 3 seconds resets the printer.

Available condition :Pause / Stand-by

Function :Feeds paper forward and is used to execute TOF

adjustment *

and Tear off adjustment *3.

Available conditions :Pause / Stand-by

Function :Feeds paper backward and performs TOF adjustment

and Tear off adjustment *3.

Available conditions :Pause / Stand-by

Function :Executes the black ink cartridge cleaning. Available condition :Pause



Cleaning (Color)

Function :Executes the color ink cartridges cleaning. Available condition :Pause



Alt



Function :Enters ink cartridge change mode. Pressing this button

for 3 seconds moves the ink cartridge to the position to be replaced.

Available conditions :Pause / Ink out

Note)

1. Before the printer power is off, the printer executes the capping function.

2. When the micro adjust is performed at the TOF (Top Of Form position) for the ASF manual and tractor feed, the new setting is stored in the corresponding address in the EEPROM.

3. When the micro adjust is performed at the tear off position, the new setting is stored in the corresponding address in the EEPROM

CAUTION



The power switch is connected to the secondary side of the electrical circuit. Since it has a delay circuit, voltage is still applied for the specified period of time after the printer power is off.



As long as the printer is plugged in, voltage is applied to the primary side of the electrical circuit. Therefore be sure to unplug the printer before servicing or replacing the interface.

1-2

Rev. A

Product Description

1.4.2 Panel Functions at Power On

This printer also enters various functions by turning on the printer while holding down a button ( buttons). Each combination and corresponding function is described in the table below.

Table 1-23. Panel Functions at Powered On

Switch *

(while turning on the printer)

Micro adjust Pause Enters printer adjustment mode. (See Section 1.4.5.) Load /Eject Enters LQ self-test printing mode. LF/FF Enters draft self-test printing mode. LF/FF + Load/Eject Enters hex-dump mode. Alt + LF/FF + Load/Eject + Micro adjust





Enters default setting mode. (See Section 1.4.4.)

Enters EEPROM and Timer IC reset *

Function

mode.

Note) 1.”+” means to press one button while holding down the other button(s).

2.EEPROM and Timer IC must be reset only by qualified service personnel.

CAUTION

When performing EEPROM reset operation, waste ink drain pads must be replaced. Therefore EEPROM reset is to be performed by a qualified service person only. (See Chapter 3.)

Rev. A

1-2

EPSON Stylus COLOR 1520

1.4.3 Printer Condition and Panel Status

This printer has several printer conditions that are indicated by the LEDs on the control panel When any of the errors listed below occurs, the printer indicates an error condition and the /ERROR signal goes “Low” and Busy signal goes “High” to stop data transfer. This condition automatically puts the printer into “Pause” status.



The carriage moves abnormally. (Fatal error)



Paper out or Paper jam condition is detected.



The PG for the paper currently loaded is inaccurate.



No ink cartridge or Ink end condition is detected.



Maintenance is required.

Table 1-24. Printer Condition and Panel Status

Indicators

Printer status Power Cover Open Ink out

(black)

Power on On Cover open Paper out Paper jam No ink cartridge or

ink end (black) Ink level low (black) No ink cartridge or ink end (color) Ink level low (color) Enter EEPROM and Timer IC reset Maintenance request Blinks Blinks Blinks Blinks Blinks Blinks Fatal error Lever error Capping function in the power off Data exit Blinks In the sequence of ink cartridge change mode Default setting mode Blinks

   

 



1 second

 

Blinks



1 second

Blinks

 





Blinks

1 second



Note)

1. “-” means no effect.

2. Fatal error is cleared by turning off and back on the printer or by inputting the /INIT signal after the problem is solved.

3. Maintenance is required when the wasted ink drain pads are filled with the wasted ink to the specified limit. On this condition servicing is needed. To clear the condition, perform EEPROM reset operation. (See Section 1.4.2 “Panel function at power on”) Refer to Chapter 2 or Chapter 3.

Ink out

(color)

 

Blinks

1 second

Paper Out Pause

Blinks

 

1 second

Blinks Blinks

 

1 second

Blinks

1-2

Rev. B

Product Description

1.4.4 Cover Open Sensor Operation

The cover open sensor equipped with this printer controls the carriage movement which has a possibility to hurt the user. The sensor performs followings:



The printer cover opens during printing:



The CR returns to the home position slowly after executing printing for the current pass. The cover open LED lights up and the printer goes into the stand-by status.



To recover, close the cover and press the pause button to continue to print. The cover open LED goes off with the recovery.



The printer cover opens during cleaning:



The printer completes the cleaning sequence. If the cover is still open after the cleaning, the cover open LED lights up and the printer goes into the stand-by status.



To recover, close the cover and press the pause button to continue to print. The cover open LED goes off with the recovery.



The printer cover opens While the printer is in the stand-by status:



The cover open LED lights up and the printer stops functioning. *



To recover, close the printer cover.

*1 :The interface is in the Busy status and the switches on the control panel are effective.

1.4.5 Default Setting

This printer has user-selectable default settings to which it refers at initialization. This section describes setting method and setting menus.

1.4.5.1 Setting Method

See the flow chart in Page 1-26 for the default setting method.

CAUTION

Be sure to turn off the printer off once after the default setting operation is executed, since



adjustment values are not stored in the EEPROM until the printer is turned off.



The latest adjustment values set before power-off are stored in the EEPROM.

Rev. A

1-2

EPSON Stylus COLOR 1520

Start

Press the "Micro Adjust " button, and

The printer prints "Usage of this mode" and firmware version number.

1.Move through the languages listed in "Usage of this mode" by pressing the "Alt " button.

2.Select the language by pressing the Pause button.

The printer prints the current setting and "Usage of this mode" in the selected language on the currently loaded paper.

the printer on.

turn

Change the settings?

YES

1. Select the menu by pressing the "Alt" button.

2. Press the "Pause" button.

LED indicators indicate the values for the selected menu.

1. Scroll the values by pressing the "Load/Eject" button.

2. Select the value by pressing the "Alt" button.

3. Press the "Pause" button.

The printer memorizes the setting value and changes the indication to the main menu.

YES

More change?

Turn the printer off to save the new settings into the EEPROM.

Figure 1-11. Default Setting Flowchart

1-2

Rev. B

1.4.5.2 Setting Menus

The default setting menus are described in the table below.

Table 1-25. Default Setting Menu

Menu Setting *

Print direction* Font

/ Bi-d / Uni-D

Auto

Roman / Sans Serif /

Courier

/ Prestige / Script/

Roman T / Sans Serif H / Draft Pitch I/F mode Auto I/F wait mode Software Auto CR (IBM mode only) AGM (IBM mode only) Character tables Standard version

10 cpi

Auto

10 seconds

ESC/P2

On /

Italic

PC 437

/ 12 cpi / 15 cpi / 17.1 cpi / 20 cpi / Proportional

/ Parallel / Mac Serial / Option

/ 30 seconds

/ IBM X24E

Off Off

, PC 850 PC 860, PC 863 PC 865, PC 861 BRASCII, Abicomp Roman 8, ISO Latin 1 PC 437 (Greek), PC 853 PC 855, PC 852 PC 857, PC 866 PC 869, MOZOAWIA Code MJK, ISO 8559-7 ISO Latin 1T, Bulgaria PC 774, Estonia ISO 8859-2, PC 866 LAT

International character set for Italic table

Italic USA

Italic Germany, Italic U.K

, Italic France

Italic Denmark, Italic Sweden Italic Italy, Italic Spain 1

Auto line feed

On /

Off

Network I/F mode This mode is for network environment.

: Used in usual environment

Off

On: Used in network environment

0 slash 0 / 0 with slash Page length 11 inch / 12 inch / 8.5 inch / 70/6 inch / other Skip over perforation Auto tear off Banner mode *

Parallel I/F transfer rate

On /

/ Off

On /

Fast

Off

/ Normal

Note) 1. Underlined parameters in bold letter are factory default settings.

2. Refer to Table 1-26 and Table-27.

3. Refer to Table 1-28..

Product Description

Rev. A

1-2

EPSON Stylus COLOR 1520

Table 1-26. Print Direction Mode Characteristics

Black and White Printing YMCK Printing (color)

Auto

Bi-D

Uni-D



Throughput and quality is better.



Throughput is the best.



Print quality may be down.



Throughput is worse.



Print quality is the best.

Table 1-27. Printing Direction and ESC U Command



Throughput is better.



Color quality with special paper is worse. (Color correction depends on the print direction.)



Throughput is the best.



Color quality with special paper is worse. (Color correction depends on the print direction.)



Throughput is worse.



Color quality is the best.

Character Mode

(for DOS)

ESC U 0 Auto Bi-D

Auto ESC U 1 Auto Uni-D

ESC U 2 Auto Auto



ESC U 0 Bi-D Bi-D

Default Bi-D ESC U 1 Uni-D Uni-D

Setting Mode ESC U 2 Auto Auto



ESC U 0 Uni-D Bi-D

Uni-D ESC U 1 Uni-D Uni-D

ESC U 2 Uni-D Auto



Table 1-28. Vertical Print Position in the manual Insertion

Trigger Banner mode Off

(manual insertion operation)

Command FF 1. Case that page length is set

by ESC (C



Eject

2. Case that page length is not set by ESC (C



Advances to the top-

margin of the next page

ESC EMR No operation No operation

Switch FF Eject Advances to the top-margin position

Eject Eject (maximum 44 inches) Advances to the top-margin position

Data Over the page length

set by command

Over the paper length

1. Case that page length is set by ESC (C



Eject

2. Case that page length is not set by ESC (C



No operation

Eject Eject

Auto Auto

Bi-D Bi-D

Uni-D Uni-D

Function

Advances to the top-margin position of the next page.

of the next page. of the next page.

No operation

Taster Graphics

Mode

(for Windows / Mac)

Banner mode On

1-2

Rev. A

Product Description

1.4.6 Printer Adjustment Mode

The EPSON Stylus COLOR 1520 allows users to adjust the printing direction and head gap without a special program. The following chart shows the adjustments method .

1.4.6.1 Adjustment Method

Start

Press the Pause button, on the printer.

The printer prints the instruction sheet on how to select the language.

1.Move through the languages listed by pressing the alt button.

2.Select the language by pressing the Pause button.

The printer prints the instruction sheet on how to adjust the printer.

Adjust a patterns ?

and

turn

YES

1. Select the appropriate test by pressing the Alt button.

2. Press the Load/Eject button.

The printer prints the test patterns.

Select the most closely aligned pattern by pressing the Pause button.

Press the Load/Eject button.

Turn the printer off once to save the new settings into the EEPROM.

Figure 1-12. Printer Adjustment Flow Chart

1.4.6.2 Adjustment patterns

Table 1-29. Printer Adjustment Patterns

Pattern Menu

Pattern 1 Uni-dir adjustment at 400 cps (with an increment of 1/1,440 inch) Pattern 2 Bi-dir adjustment at 400cps (with an increment of 1/1,440 inch) Pattern 3 Bi-dir adjustment at 200cps (with an increment of 1/1,440 inch) Pattern 4 Head gap adjustment between black and color to the cross feed

direction at 200 cps (with an increment of 1/720 inch)

Pattern 5 Head gap adjustment between black and color to the cross feed

direction at 100 cps (with an increment of 1/720 inch)

More adjustment ?

YES

Rev. A

1-2

EPSON Stylus COLOR 1520

1.4.7 Printer Initialization

This printer has three initialization types: Power-on initialization, Operator initialization, and Software initialization.



Power-on Initialization This printer is initialized when turning on the printer. Then the printer recognizes the cold reset command (Remote RS command). When the printer is initialized, following actions are performed:



Initialize the printer mechanism.



Clears input data buffer.



Clears download character set.



Clears print buffer.



Sets default values.



Operator Initialization This printer is initialized when Pause button is pressed for 3 seconds, or the printer recognizes the /INIT signal (negative pulse) of parallel interface. When the printer is initialized, following actions are performed:



Clears input data buffer.



Clears download character set.



Clears print buffer.



Sets default values.



Software Initialization This initialization is performed by the ESC @ commend and the following actions are performed:



Clears print buffer.



Sets default values.

1.4.8 Self-test Printing Mode

This printer has the self-test printing mode. Following items are checked by performing this mode.



Function for the control circuit board



Function for the printer mechanism



Print quality The printer enters the LQ self-test printing mode by pressing the Load/eject button while turning on the printer. To enter the draft self-test printing mode by pressing the LF/FF button while turning on the printer.

1.4.9 Hexadecimal Dump Function

Pressing the LF/FF and Load/Eject buttons while turning on the printer activates the hexadecimal dump mode. Each line has Hexadecimal codes, along with their corresponding letters printed in the right column. If a received code denotes an unprintable character. Such as a control code, “.” (period) is printed in the right column. This function enables users to check whether the data from the host is properly transferred. Turn off the printer to exit the mode.

1.4.10 Monochrome Printing Mode

When the printer is in the ink end (color) condition, the black ink is substituted to continue to work. In order to switch to monochrome printing mode, turn the printer off and back on. This mode is also selected by the command “

ESC (K)

“. The Color select command “

” is ignored in this mode.

ESC r

1-3

Rev. A

1.5 Physical Specification



Weight :6.5 Kg



Dimension :666 mm (W) X 554 mm (D) X 202 mm (H)

(26.2” X 21.8” X 7.9”)

Refer to Appendix for details.

Product Description

Rev. A

1-31

EPSON Stylus COLOR 1520

1.6 Main Components

The main components of the EPSON Stylus COLOR 1520 are designed for easy removal and repair. They are as follows:



Main control board :C211 MAIN Board



Power supply board :C172 PSB/PSE Board



Control panel bard



Printer mechanism :M-4160



Housing

1.6.1 C211 MAIN Board

This board consists of a 16-bit CPU (IC7) (clock wave : 19.66Mhz), gate arrays B05B33 (IC8) and B05B34 (IC6), PROM (IC14), MROM (IC12), DRAMs (IC9, 10), RESET ICs (IC1, 4), EEPROM (IC2), two motor drive ICs, printhead drive circuit, and so on.

Serial Interface IC

MROM

DRAM 4M

PROM 8M

Reset IC

Timer IC

Gate Array E05B33CPULithium Battery

PF Motor Drive IC

Gate Array E05B34

EEPROM

Figure 1-13. C211 MAIN Board Component Layout

Printhead Common Drive Circuit

CR Motor Drive IC

1-3

Rev. A

Product Description

1.6.2 C172 PSB/PSE Board

This board consists of a transformer, switching FET, regulator IC, diode bridge, fuse, and so on.

Fuse

Regulator IC

Transformer

Diode Bridge

Figure 1-14. C211 PSB/PSE Board Component Layout

Switching FET

Rev. A

1-3

Chapter 2

Operating Principles

2.1. Overview..............................................................................................................2-1

2.2. Printer Mechanism Operating Principle............................................................2-1

2.2.1.1. M - 4I60 Printer M ec hanism ................................................................................... 2-1

2.2.2. Printing Mechanism......................................................................................................... 2-2

2.2.2.1. Pr inthead Struc ture.............................................................................................. 2-2

2.2.2.2. Printing Process.................................................................................................. 2-3

2.2.2.3. Pr inting Methods.................................................................................................. 2-3

2.2.3. Carriage (CR) Mechanism................................................................................................ 2-5

2.2.4. Paper Feed Mechanism.................................................................................................... 2-6

2.2.4.1. A S F (Auto Sheet Feeder) Mechanism ................................................................. 2-7

2.2.4.2. Tractor M ec hanism.............................................................................................. 2-8

2.2.4.3. Manual Feed Mechani sm ..................................................................................... 2-8

2.2.5. Platen Gap (PG) Adjust Mechanism................................................................................ 2-9

2.2.6. Ink System.......................................................................................................................2-10

2.2.6.1. Pump Mechanism...............................................................................................2-11

2.2.7. Capping Mechanism .......................................................................................................2-14

2.2.7.1. Wiping/CR Lock M ec hanism...............................................................................2-15

2.3. Electrical Circuit Operation Principles............................................................2-16

2.3.1. C172 PSB/PSE El ectrical Circuit Board .........................................................................2-16

2.3.2. C211 MAIN Control Board...............................................................................................2-18

2.3.2.1. Reset Circuits.....................................................................................................2-20

2.3.2.2. Sensor Circuits...................................................................................................2-20

2.3.2.3. CR Motor Driver Circuits.....................................................................................2-22

2.3.2.4. PF Motor Driver Circuit.......................................................................................2-23

2.3.2.5. Pr inthead Driver Circuit ......................................................................................2-24

2.4. Ink System Management ..................................................................................2-27

2.4.1. Ink System Operations....................................................................................................2-27

2.4.2. Counters..........................................................................................................................2-28

Operating Principles

2.1 Overview

This chapter describes the operating principl e of the printer mec hanism and electrical c ircuit .

2.2 Printer Mechanism Operating Pri n ci ple

2.2.1.1 M-4I60 Printer Mechanism

This printer is composed of the print head unit, paper f eedi ng mechani sm, CR m echani sm and the pum p mechanism . The block chart for the print er m echani sm is shown in Fi gure 2-1. The pri nt er m echani sm of this printer has 2 motors: CR motor and PF motor. The torque f rom the CR m otor m oves the CR i n the column direction. The torque from the PF motor is transmitted to 2 ways: to the paper feeding mechanism and to the pump m echanism. The di rection is determ ined by the CR posi tion. The release lever transmits the torque from t he P F motor to the tract or si de to feed cont inuous paper.

Release Lever

Disengage Mechanism

Push Tractor Mechanism

PF Motor

Paper Feed Mechanism

CR Motor

ASF Mechanism (For Cut sheet only.)

`Pump Mechanism

CR Unit

Black

Color

Figure 2-1. Printer Mechanism Block Diagram

Rev. A

2-1

EPSON Stylus

COLOR

1520

2.2.2 Printing Mechanism

The printing method used for this printer is On-demand ink j et, sam e as for other EPSO N ink j et pri nters. The new method used for the print head enables the pri nter t o produce output in high qual it y at a hi gher speed. The printing mechani sm has 2 parts: ink cartr idge and printhead. T he ink cartri dge is filled with ink.

2.2.2.1 Printhead Structure

The printhead f or this printer has the bl ack head and color head. The struct ures of the printheads are basically the same except for the nozzle c onfiguration. The black head, used for the bl ack ink only, is composed of 128 nozzles (32 nozzles f or each of 4 rows) The color head, composed of 3 heads for Magenta, Cyan, and Yellow, has 64 nozzles (32 nozzles for each of 2 rows) for eac h c olor.

Printhead Driver Circuit Board

Nozzle Plate

To the ink cartridge.

Piezo

Cavity

Nozzle

Figure 2-2. Printhead Structure

Rev. A

Operating Principles

2.2.2.2 Printing Process

Steps bellow describe how the i nk is ejected from each noz z le with the on-demand ink jet system.



No print signal is applied t o the PZT. In thi s state, the PZT does not di splace and no pressure is added inside the cavity. Therefore the pressure in t he c avi ty is kept at a c onstant level.



Print signal is appli ed to a specifi c nozzle by the head driv er circ uit to dri ve t he PZT of the nozzle. The vol tage which drives the PZT is produced in t he com m on dri ver ci rcui t boar d on the cont rol board. When the v oltage is applied to the PZ T, the PZT displac es and the pr essure in the cav ity c hanges. Then t he ink is ejected as a result .

Step 1

Step 2



Normal state



Ejecting state



Normal State

Cavity

Nozzle

Figure 2-3. Printing Operation States

When no print signal is applied to the PZT, the PZT recovers from the displaced status. With this process, the cavity also returns to its normal size, which brings the pressure negativ e. The negative pressure in the cav ity t hen absorbs the ink from the cart ridge to f ill the cavity with the ink again for the next printing motion. The ink which was not used for printing adheres on the nozzle surface and increases vi scosity in the nozzles, and i t causes printing malfunct ion. Theref ore the ink is periodicall y absorbed and wasted into the waste ink drain pads by the pump mechanism. Ink viscosity varies depending on the temperatures around the head. S ince the c hange in the ink v iscosity c auses decr eas in the print quality, the thermistor is attached to the black head driver circuit board to control the driv e voltage at the proper lev el refer r ing to the detec ted head temperature.

Piezo

Ejected Ink

Ejecting State

2.2.2.3 Printing Methods

This print er has following special printing modes to pr int various types if graphic image.



Double Firing Normal dot / One do t printing mode

This print er form s 1 dot with double ink ejections i n the ANK or bit map image mode. I n the raster graphics mode which r equires a high-resolut ion-print ing, however, forms 1 dot wit h a si ngle ink ejecti on.



EPSON Micro dot printing

Both black and color pri nt ings can be performed in the normal dot printing mode and EPSON micro dot printing mode. In the normal dot printing mode, the print er uses less ink t o c r eate sharper dots. Therefor e the gradation range is expanded with more delic ate tone. This mode is available when the 1440X720-dpi-paper or glossy film is selected.



Micro Weave Printi ng

In this m ode, nozzles to be act iv ated are divided and onl y specifi c noz z les are used for each pass. The paper is also fed in a smal ler increment for this operation. Thi s mode eliminates white banding that occurs between lines to impr ove graphic im ages. Dec r ease i n paper feed speed is, howev er, inevitabl e. The Micr o Weave printing can be selected t hr ough the printer dr iv er.

Rev. A

EPSON Stylus

Paper Type 180 dpi 360 dpi 720 X 360 dpi 720 dpi 1440X720 d pi

COLOR

1520

Table 2-1. Special Printing Availability

Black print ing for the raster data

360 dpi exclusi ve paper

720 dpi exclusi ve paper

OHP sheet

Gl ossy film Glossy paper

Normal paepr 2 dot printing







Normal dot

Micro Weav e

2 dot printing

Normal dot

Micro Weav e

2 dot printing

Normal dot

Micro Weav e

1 dot printing

Normal dot

Micro Weav e



1 dot printing

Normal dot

Micro Weav e



1 dot printing

Normal dot

Micro Weav e

1 dot printing

Normal dot

Micro Weav e



1 dot printing

Normal dot

Micro Weav e

1 dot printing

Normal dot

Micro Weav e

Color printing for the raster data

360 dpi exclusi ve

720 dpi exclusi ve

OHP sheet

Gl ossy film Glossy paper

Normal paepr 2 dot printing







Normal dot

2 dot printing

Normal dot

Micro Weav e

2 dot printing

Normal dot

1 dot printing

Normal dot

Micro Weav e



1 dot printing

Normal dot

Micro Weav e



1 dot printing

Normal dot

Micro Weav e

1 dot printing

Normal dot

Micro Weav e



1 dot printing

Normal dot

Micro Weav e

1 dot printing

Normal dot

Micro Weav e

For ANK, Bit map image dat a

360 dpi exclusi ve

2 dot printing

Normal dot

2 dot printing

Normal dot



Rev. A

Operating Principles

2.2.3 Carriage (CR) Mechanism

The CR mechanism is composed of the CR unit, tim ing belt, CR guide shaft, paper eject fram e, HP sensor (Home Position sensor) and CR motor. The CR motor sends torque to t he ti m i ng bel t t o m ov e t he CR unit in the both right and left di rections along t he paper eject f rame and CR gui de shaft. A stepping motor used for the CR m otor enables the CR uni t to m ov e and stop at any posi tion. The CR is pri mari ly detected at the home position by HP sensor when the printer is turned on and its position is then controll ed by the open loop. Table 2-2 and Table 2-3 show the specifi cat i on f or t he CR m otor and the CR motor driv e terms, respectiv ely.

Table 2-2 CR Motor Specificati on

Item Descriptio n

Motor type 4-phases / 200-pole / HB type stepping m otor Drive v oltage Coil resistanc e Exci tation mode Unipolar dr iv e

Drive frequenc y 480 ~ 9600 Hz Minimum step 0.106 mm (1-2 phase drive)

42 VDC  5% (The voltage appl ied to the driver ) 5   7% (at 25 C per 1 phase)

1-2 phase, 2w1-2 phase : Constant current drive

0.026 mm (2W1-2 phase drive)

Table 2-3 CR Motor Dri ve Terms

mode

Print speed Acceleration1Acceleration2Constant Deceleration1Deceleration

Draft 400 cps 0.96 0.96 0.70 0.70 0.70

LQ 200 cps 0.96 0.96 0.70 0.80 0.80

SLQ 100 cps 0.90 0.90 0.60 0.80 0.80

CR Motor

CR Unit

Timing Belt

Sub Pulley

Pulley

HP Sensor

Paper Eject Frame

CR Guide Shaft

Figure 2-4. CR Mechanism

Rev. A

EPSON Stylus

COLOR

1520

2.2.4 Paper Feed Mechanism

The paper feed mechanism of this printer consists of the integrated ASF (Auto Sheet Feeder) mechanism , tractor mechanism, PF (Paper Feed) m otor, front /rear PE (Paper End) sensors, PF roll er, paper guide mechanism, paper eject unit, and P F motor dri ve disengage m echanism. The tor que from the PF motor driv es the paper load mechanism, paper feed m echanism and paper eject mechanism. Whi le t he printer is not pri nting, the PF m otor dr iv e disengage m echanism switches t he tor que f rom the PF mot or to t he pum p m echani sm, which depends on the CR posit i on. Whi le t he paper f eed m echani sm is driv en, the torque from the PF motor is transm itted v ia PF m otor pinion gear and di sengage gear to the PF roller., where the torque is then div ided into 2 direct ions. One is transmit ted to the paper eject mechanism via the gear train in the paper guide assembly. The other is transmitted to the ASF mechanism via the transm ission gear. The tractor driv e gear train is set at the lef t end of the PF roller. Table 2-4 and Table 2-5 shows the specifi cation for the PF m otor and PF motor drive term s, respectivel y. Figure 2-5 illustrates the paper feed m ec hanism.

Table 2-4 PF Motor Specifi cat ion

Item Descriptio n

Motor type 4-phases / 96-pole / HB type stepping m otor Drive v oltage Coil resistanc e Connection Bipolar Exci tation mode 2-2 phase, 1-2 phase, W1-2 phase constant current drive Minimum step 1/720 inch / step ( 2- 2 phase drive)

42 VDC  5% (The voltage appl ied to the driver ) 10   10% (at 25 C per 1 phase)

Table 2-5 PF Motor Drive Terms

Operatio n

Acceleration Constant Deceleration Stand-b y

mode

Paper feed

0.9/0.9 0.9 0.75/0.75 0.6

(Line feed:6/1 inch)

ASF Feed 0.9/0.9 0.9 0.75/0.75 0.6 Pump dri ven Pump dri ven



/0.9



0.9 0.9 0.6

0.9



(slow)

Note) Double 1-2 phase drive / 2-2 phase dr iv e

Tractor Disengage Gear

To the tractor mechanism.

To the ASF mechanism.

ASF

Transmission Gear

PF Motor Pinion Gear

Disengage Gear

PF Drive Roller

PF Motor

0.6

Paper Eject Roller Shaft

Pump Mechanism

Paper Eject Roller Unit

Paper Eject Roller Shaft

Figure 2-5. Paper Feeding Mechanism

Rev. A

Operating Principles

2.2.4.1 ASF (Auto Sheet Feeder) Mechanism

Torque from t he PF roller is transm itted to the pic k up roller in the AS F mechanism via t he planetary gear by the PF motor drive disengage mechanism which switches the torque based on the detected position of the CR unit. T he pick up roller shaft has 2 arms on the r ight and l eft ends. The arms push down the paper support to make t he paper surface contact with the pick up roller. The one way clutc h rotates the puck up roller in the specifi ed directi on to load paper. The paper loaded is then f ed by the paper feed mechanism and t he gear transmission from t he planetary gear is disengaged.

ASF Mechanism

Pickup Rollers

Arm

Front PE Sensor

One Way Clutch

Disengage Gear

Paper

PF Roller

Figure 2-6. ASF Mechanism

Pinion Gear

ASF transmission Gear

Paper Support

PF Motor

Rev. A

EPSON Stylus

COLOR

1520

2.2.4.2 Tractor Mechanism

Torque sent from the PF motor to the gears at the lef t end of the P F roller i s transmitted to t he tractor gears via disengage mechanism by the release lever operation. W hen the release lev er is set to the tractor side, the release sensor detects the position and the torque from the ASF mechanism is disengaged consequently.

Tractor Disengage Gear

Release Lever

Rear PE Sensor

PF Roller

PF Motor

PF Motor Pinion Gear

Disengage Gear

Figure 2-7. Tractor Mechanism

2.2.4.3 Manual Feed Mechanism

The printer loads cut sheet and rol l paper at the rear paper sl ot. W hi le paper i s detected by the rear PE sensor, the CR unit is off the ASF paper f eed positi on. Ther efore paper is manual ly l oaded ev en if there is paper in ASF. This mode all ows the use of paper whi c h is not set in ASF.

Rev. A

Operating Principles

2.2.5 Platen Gap (PG) Adjust Mechanism

The PG adjust m echanism, l ocated at the t op right of the print er mechanism , allows the user to set the proper platen gap (di stance between paper and nozzle surface) f or the paper thickness to prevent i nk smudging. The PF Adjustment mechanism consists of the PG adjust lever, CR guide shaft, and parallel ism adjust bushings. Shi fting t he lever f rom “0” t o “1” turns the CR guide shaft that joi ns to the lever. The joint for the parallelism adjust bushing and CR guide shaft has an eccentricity toward the guide shaft, which m oves the guide shaf t f rom or t oward the pl aten. Wi th t his m ov em ent , t he pl at en gap changes from wide to narrow or vice versa.

Table 2-6. Platen Adjust Lever positions

Paper Type Adjust lever Position PG Adjustment Value

Cut Sheet, O HP S heet,

Label, Continuous paper

Envelope ,Card, I ndex card Fr ont + 0.7 m m

Rear 0

PG Adjust Lever

Parallelism Adjust Bushing

Figure 2-8. Platen Gap Adjustment Mechanism

Eccentricity

Printhead

Platen Surface

Platen Gap

CR Guide Shafts

Rev. A

EPSON Stylus

COLOR

1520

2.2.6 Ink System

The ink system for this printer i s composed of the foll owing mechanism s.



Ink cartridge



Pump m ec hanism



Capping mechanism



Waste ink drain pads



Wiping m ec hanism

Figure 2-9 shows the block char t of the ink system.

Air Valves

Color Ink Cartridge

Black Ink Cartridge

Pump 2

Cleaner Head for Black and Color Inks

Clutch Unit

Combination Gear

Pump 1

Pump Unit

PF Motor

Disengage Gear

Gear

Waste Ink Drain Pads

Figure 2-9. Ink System Mechanism

2-1

Rev. A

Operating Principles

2.2.6.1 Pump Mechanism

1. Switching operation f r om the paper feed mechanism to the pump mechanism The PF m otor also functions as the pum p motor by the switchi ng operation of the PF motor driv e disengage mechani sm. When t he CR unit returns to the hom e positi on, the switch lever in the CR unit pushes the cam lev er. Then the disengage gear switches the torque f rom t he ASF to the pum p mechanism via the gear t rain. Figure 2-11 illustrates how the torque is transmi tted from the paper feed m ec hanism to the pump mechanism.

PF Motor Drive Disengage Mechanism

Release Lever

Switch Lever (CR)

ASF Transmission Gear set Lever

Switch Lever (CR)

Release Cam Set Lever

PF Motor Drive Disengage Mechanism

Release Cam

Disengage Gear

The direction in which the CR moves.

Figure 2-10. Release Cam Reset

CR Unit

Switch Lever

Release Cam

Torsion Spring

PF Motor Pinion Gear

PF Motor

Disengage Gear

Pump Mechanism

Rev. A

Figure 2-11. Paper Feed Mechanism Function

2-11

EPSON Stylus

COLOR

1520

2. Switching operation f r om the pum p mechanism to the paper f eeding mechanism When t he CR uni t shifts f rom the r ight end to t he l ef t end, the switch l ever i n the CR uni t pushes the cam rel ease. Then the disengage gear switches the tor que from the pump m echanism to t he paper feed mechanism as a result. Figure 2-13 illustrates how the torque is transmitted from the pump mechanism to the paper feed mechanism.

Switch Lever (CR)

Release Lever

Path of the CR

Disengage Mechanism

Release Cam

Switch Lever

Release Cam

PF Roller

Figure 2-12. Release Cam Reset (2)

CR Unit

PF Motor Pinion Gear

PF Motor

Disengage Gear

Pump Mechasnim

Figure 2-13. Paper Feed Mechanism Function (2)

2-1

Rev. A

Operating Principles

3. Pump Mechani sm Operati on The pump mechanism absorbs ink inside the printhead and drai ns the i nk t o the waste ink dr ain pads vi a the cap. Since thi s printer has black and color heads, the pum p m ec hanism f unct i ons for the bot h heads by alternating rot ational dir ections of the PF motor. W hen the PF motor r otates forward (the directi on for feedi ng paper), the pump is used for t he black head. The PF m otor rotates backward (the direct ion for feeding back paper) to use the pump f or t he color head. The pump m echanism is composed of the 2 rollers: tube, and pull ey. To draw the ink, the pul ley rotat es the roller s squeezing the tube to produce the negative pressure, which absorbs the ink and dr ains it into the waste ink drain pad.

Pulley

Ink Drawing

Ink Draining

Ink Drawing

PF Motor (Backward):Color Ink Drawing

Pulley

No Ink Drawing

No Ink Draining

PF Motor (Backward):No Black Ink Drawing

Figure 2-14. Pump Operation

Ink Draining

PF Motor (Forward):Black Ink Drawing

No Ink Draining

No Ink Drawing

PF Motor (Forward):No Color Ink Drawing

Rev. A

2-1

EPSON Stylus

COLOR

1520

2.2.7 Capping Mechanism

The capping m echanism caps the print heads with the cap hol ders to prev ent the i nk around the nozz les from increasi ng v iscosity while the pri nter i s in the stand-by stat us or the print er power is off . The c ap is indiv iduall y equipped for the bl ack and color head. W hen the CR m oves right f rom the home positi on, the cap holder al so shif ts ri ght and str ik es the ri ght f r am e. T his m oti on opens the ai r valve to r elease the air in t he cap. To star t printi ng operation, t he CR mov es right f rom the hom e positi on to strike t he right fram e with the cap holder so that the air v alv e opens. Thi s operati on brings the negati v e pressure in the cap back to normal and the CR goes back the home posi tion. The power switch of this pri nter uses the secondary circuit that keeps the pr inter power on until the capping oper ation com pletes ev en if t he printer is turned off during the oper ation.

Black Ink Cartridge

Cap 2

To the waste ink drain pads

Air Valve

Color Ink Cartridge

To the waste ink drain pads

Hinge

Valve Spring

Air Tube

Figure 2-15. Capping Mechanism

Cap Holder

Cap 1

Right Frame

2-1

Rev. A

Operating Principles

2.2.7.1 Wiping/CR Lock Mechanism

The wiping mechanism remov es the ink and dust adhered around the nozz les. Thi s is operated duri ng a cleaning sequence. W hen the P F motor r otates backward, the tor que sent v ia t he head cl eaner (wiper) driv e gear and the clutc h mov es the head cl eaner to the pat h of t he print head. Then the CR uni t m ov es right and l ef t t o wipe the noz zl e surf ace agai nst the head cl eaner. The head cl eaner l eaves the path wit h the forward rotati on of the PF motor. Only one cleaner head i s used for both bl ack and color heads. The head cleaner is substit uted for the CR l ock mechanism. When the pr inter power is of f, i t locks t he CR unit off the pri nting side. T he r ight f r ame also lock s the CR at the right end. W ith t his mechanism, the CR remains i n the capping position while transport ed.

Head Cleaner

Head Cleaner Lever

Printhead

PF Motor

Gear Train

Disengage Mechanism

Figure 2-16. Wiping/Carriage Lock Mechanism

Pump Gear/Clutch

Switch Lever

Head Cleaner Lever

Rev. A

2-1

EPSON Stylus

COLOR

1520

2.3 Electrical Circuit Operation Pr i n ci ples

This print er c onsi sts of the f ollowing ci r c uit board:



C211 MAIN board



C178 PSB/PSE board



C211 Panel board Head driver circui t s (nozzle selecti on circ uit ) are dir ectl y at tac hed to t he blac k and col or heads. F igur e 217 shows the block diagram of the el ec trical c ircuit .

C211 PNL

C172 PSB/PSE

+5 VDC

+42 VDC

C211 MAIN

M-4I60 Mechanism Unit

CR/PF Motor

CR Unit

Color Head Driver Circuit

Black Head Driver Circuit

Figure 2-17. Electrical Circuit Block Diagram

2.3.1 C172 PSB/PSE Electrical Circuit Board

The input vol tages for the PSB/PSE board are as shown in Table 2-7. Since the electr ical circui t of t his printer is in a secondary circ uit, i t accommodates the delay timer to make the printer execute the capping operation ev en though the printer is turned off during the operati on. With t his function, t he printer can prevent the ink clogging or smudging caused by the exposed printhead.

Table 2-7. DC Voltage Distribution

VDC Application

+42 V

+5 V



CR motor/PF motorMotors



Printhead common voltage



C211 MAIN control board (logic)



Sensors (HP sensor, PE sensor, ink cartri dge sensor, DE sensor, cover open sensor)



Control panel , Head nozzle selection

The electrical circuit of this board uses the RCC (Ringing Choke Converter) switching regulator. AC voltage is first input to the filter circuit for higher harmonics absorption and is then input to the rectification and smoothing circuit, converting into DC voltage. This DC voltage is then input to the switching circuit. Along with this switching operation by FET on the primary side, +42 voltage is generated and stabilized on the secondary side. The produced +42 v oltage i s then conv erted into t he stable +5 VDC by the regulator I C. The CPU on the C211 MAIN board moni tors the on/off signal of the power switch on the control panel. When t he power goes off, t he CPU sends the Power Off signal (PSC) to the electric al ci rcuit . The el ectri cal board has a del ay circ uit (Z D86, C82 and Q84) t o delay t he power off. The electrolytic capacitor, which control the delay peri od, continues to output +5 V and +42 V by keeping the main circui t switch on the primary side act ive unti l all electr ic charge is discharged. (The delay period is normally minimum 20 seconds, which depends on the capacitor size.)

2-1

Rev. A

Figure 2-18 illustrates the electrical circuit diagram.

Operating Principles

Full Wave Rectifier Circuit

Filter

Fuse

AC Input

Primary Circuit

Smoothing Circuit

Switching Circuit

(Q1)

Half Wave Rectifier Circuit

Photo-coupler PC1

+42 V

Protection Circuit

(Q81, Q82)

+42 V

Protection Circuit

(ZD52, ZD53, ZD87, Q82, Q83)

+5 V

Protection Circuit

(ZD53, Q82)

Secondary Circuit

+42 V

Line Detector

Circuit

(ZD51, 81 to 86)

Line Over Current

Line Over Voltage

Over Voltage

Chopping Regulator

(IC51)

+42 V

+5 V

Power Off Delay Circuit

(ZD88, C84, Q84)

Power Off Signal

Figure 2-18. Power Supply Circuit Diagram



+5 VDC line over vol tage protection circuit The output volt age lev el of t he 5 V line is monitored by a Zener diode (ZD53) . If the voltage level exceeds 9 V, the status is fed back to the pr imary switc hing circuit through t he transistor (Q82) and photocoupler (P C1) to cut the + 42 V line to t he r egulator (OC51) .



+5 VDC line constant voltage control ci r c uit Voltage at +5 VDC l ine is controlled by the regulator IC (IC51). When the abnormal voltage at +5 VDC line is detected, the status is input to t he internal c omparator of the regul ator to control the voltage.



+42 VDC line over vol tage protection circuit The output l evel of the + 42 V DC line is monitored by the 2 Zener diodes ZD52 and Z D87. W hen the output level of the + 42 V DC line ex c eeds +48 V, the switching FET operation on t he pr imary si de is stopped via the thyristor (CY52), t r ansi stor ( Q81) and photocoupler ( P C21) .



+42 VDC line constant voltage control ci r c uit Voltage at the +42 VDC line is monitored by the Zener diodes (ZD51, ZD81ZD86). This circuit feeds back the output vol tage level status through photocoupler (PC1) to the primary switching c ircuit to control t he on/off time of the switching FET for constant output voltage.



+42 VDC line over c ur r ent protection circuit The output curr ent is moni tored by the transi stor s Q81 and Q82. When the output c ur r ent is abnormally low, the status is assumed to be a short ci r c uit and the i nform ation is fed back to the primar y c ircuit to stop the switching F E T operation

Rev. A

2-1

EPSON Stylus

COLOR

1520

2.3.2 C211 MAIN Control Board

This print er uses C211 MAIN for the main contr ol circuit board. I t consists of the following:



16-bit CPU C90A02CB ( IC7) :Running at 19.66 MHz



2 gate arrays E05B33 (IC6) :Controls interfaces, motors and printheads.

E05B34 (IC5)



P-ROM, DRAM and M ROM



Drivers :Pr oduc es common volt age for the motors and print heads. Table 2-8 and Figure 2-19 show the allocated functions for major components and the main control

circui t block di agr am, respectively.

Table 2-8. Location and function of the Major Components

IC Location Function



16-bit CPU



Run at 19.66 MHz

CPU IC7

Gate Array IC5

Gate Array IC6

DRAM IC9 DRAM IC10

MROM IC13

P-ROM IC11 P-ROM IC14

EEPROM IC2

Timer counter IC IC3

Common dr iv er

IC Driver I C16 Driver I C17

IC18 IC19



Controls the printer at the gate arrays IC5 and IC6 according to the program in P-ROM.



Controls the I/F f or the control panel.



Controls the CR motor.



Detects the signal s from t he P E sensor, cov er open sensor and REL (Release) sensor.



Controls the parallel I /F.



Controls the serial I/F.



Controls Type-B I/F.



Controls the PF motor.



Controls black and c olor heads.



Controls the HP sensor and DE sensor.



Manages buffers, work area in the CPU, and stuck area.



For image buffer. Expansion



24 Mbit



Manages C.G. (Character Generator ) .



Equipped only for the Eur opean version.



8Mbit



Printer c ontrol program



Manages C.G. (Character Generator ) .



Stores v alues for the default settings and other values.



Manages timer s for the ink system.



Produces common voltage f or the black head.



Produces common voltage f or the color head.



Drives the PF m otor.



Drives the CR motor.

2-1

Rev. A

Operating Principles

Type-B I/F

Head Temperature

+42V

Power Line Reset IC M51955BFP (IC4)

+5V

Logic Line Reset IC RST592D (IC1)

P-ROM(8M) (IC14)

CPU C90A02CB (IC7)

P-ROM(4M) (IC11)

+5V

EEPROM LE93C56 (IC2)

+5V

Lithium Battery

DRAM(4M) (IC9)

Timer Counter IC RTC-45436A (IC3)

DRAM(4M) (IC10)

CLK

SD I/O

MROM (IC12)

GA E05B34 (IC5)

GA E05B33 (IC6)

MROM (IC13)

Data Bus

Address Bus

+42VDC

+5VDC

PSC

CR Motor Control

Control Panel

PE, Cover Open, REL Sensors

HP, DE Sensors

Black/Color Control Signals

PF Motor Control Signal

Parallel I/F

Serial I/F

From IC6

From IC5

From IC6

Carriage

Black/Color Head Common Driver Circuit

Nozzle Selection Signal

CR Motor Driver Circuit SLA7043M (IC17)

PF Motor Driver Circuit

Nozzle Selection IC

CR Motor

PF Motor

UDN2917EB (IC16)

Figure 2-19. Control Circuit Block Diagram

Black Head 128 Nozzles

Color Head 64 Nozzles

Rev. A

2-1

EPSON Stylus

COLOR

1520

2.3.2.1 Reset Circuits

The C211 MAIN board contains two reset circui ts: logic line (+5 V) and power (+42 V) line. Reset IC M51955BFP (IC4) monitor s the +42 V line. It output s /NMI si gnal t o the CP U and the gat e array t o cut off the power line for the motors when the voltage level drops below 33.2 V. Reset IC RST592D (IC1) monit ors the +5 V l ine and sends low pulse when the v oltage lev el drops bel ow 42 V. During t he pri nter power on, it outputs LOW until stabilized +5 V is produced to ensure the CPU’s proper operation.

+42V

+5V

M51955BFP

(IC4)

OUT2

OUT1

NMI

CPU

C90A02CB

(IC7)

RST592D

RES

(IC1)

VOUT

XRESET

RESET

E05B34

(IC5)

E05B33

(IC6)

Figure 2-20. Reset Circuit Block Diagram

2.3.2.2 Sensor Circuits

This print er has 9 sensors to monitor the printer condition.



HP Sensor (Home posit ion sensor) The HP sensor for this printer uses the photo interrupter system. When the CR unit is at the home position, the signal goes low. A high signal level indic ates that the CR unit is off the home position. The photo int er r upted system is highly reliable because it has no cont ac t with any mec hanism.



PE_R sensor (Rear Paper End sensor) The PE_R sensor, attached to the rear si de of the paper pat h, detects the paper presence condition for cont inuous paper or cut sheet set in the rear side of the paper path. A mechanical switch used for this sensor opens when paper is fed and closes without any paper detected.



PE_F sensor (Front Paper E nd sensor) This PE_F sensor, located i n the paper guide unit, detects cut sheet pr esence condition in ASF. This sensor uses a mechanical switch which opens when paper is detected and closes with no paper detected.



REL sensor (Release sensor) REL sensor is built into the rear part of the left fram e in the printer mechanism. It determi nes whether the release lever i s set to the cut sheet side (frict ion mode) or c ontinuous paper side (trac tor mode). A mechani c al switch used for t his sensor opens and closes when the lever is set for the friction mode and for the tractor mode, respectivel y.



DE sensor (Disengage sensor) DE sensor built i nto the middle f r ame detects the CR posi tion. A mechanical switch used for this sensor opens when the CR is at the pump side and it c loses when the CR is at the paper feeding side.



BCO sensor (Black ink cartridge sensor) BCO sensor, attached to the blac k ink cartridge holder i n the CR unit, detects the black ink cartridge install ation condition. A mechanical switch used for this sensor indicates Low when the cartri dge is install ed and goes Hi gh when the car tridge is not installed. W hen the sensor detects no cartri dge conditi on, it resets the ink consumption counter.

2-2

Rev. A

Operating Principles



CCO sensor (Color ink c ar tridge sensor) CCO sensor, attached to the color ink cartridge holder i n the CR unit, detects if the color ink cartridge is installed. A mec hanical switch used for this sensor indic ates Low with a cartridge installed and goes High without it. When the sensor detects no cartr idge condition, it r esets the ink consumption counter.



Cover open sensor Cover open sensor, located at the right end of the pri nter mechanism unit, monitors the open/close status for the pr inter cover. A mechanical switch for this sensor opens when the cov er is closed and closes when the cover is opened. When a cov er open c ondition is detected, the pr inter sopts print ing at the end of the line and returns the CR slowly to the CR lock position. When printing is comm anded, the CR is left unloc k ed.



Thermistor Thermistor is attached onto the color head to monitor the temperatures around the head. It is operated to avoid change in ink viscosity, which affects printing result. The signal output from the sensor is directly transmit ted to the analog por t of the CP U.

Figure 2-21 shows sensor circuit block diagram.

Thermistor

SWA3

GA E05B34 (IC5)

GA E05B33 (IC6)

SWA2

SWA1

SWA0

SWA1

SWC0

SWC1

THS

Data Bus

CPU C90A02CB (IC7)

Address Bus

Figure 2-21. Sensor Circuit Block Diagram

PE_R Sensor

PE_F Sensor

REL Sensor

Cover Open Sensor

HP Sensor

DE Sensor

BCO Sensor

CCO Sensor

Rev. A

2-21

EPSON Stylus

COLOR

1520

2.3.2.3 CR Motor Driver Circuits

The CR motor driver IC SLA7043M (IC15) sends motor phase data using the serial data (XCRCLK, XCRSTB, CRASERI, CRBSERI) and v oltage ref erence data (CRV) from the gate array E05B34 to the driver to control the phase current in the driver. The data output from the phase A and phase B (CRASERI, CRBSERI) are transf erred synchronizing with the clock signal (XCRCLK). T hen the data i s read at the driver IC by the strobe signal (XCRSTB). This sequence enables the micro step with a mini mum of 0.026 m m pulse dri ven at 2W 1-2 phase ex citati on. The hold signal (CRHLD) also dri ves 2 phases to place the CR to the home positi on and to the cartridge change positi on. The Figur e 2- 22 shows the CR motor dr iv er c ircuit block diagram.

GA E05B34 (IC5)

XCRCLK

XCRSTB

CRASERI

CRBSERI

From CRV0 to CRV6

PF Motor Drive IC SLA7043M (IC17)

CLKA CLKB

STBA

STBB

DATAA DATAB

REFA

REFB

101 102

+5V

CRV

Figure 2-22. CR Motor Block Diagram

PF Motor

+42V

CR A

CR_A

CR B

CR_B

CRCOM

2-2

Rev. A

Operating Principles

2.3.2.4 PF Motor Driver Circuit

The PF m otor for this printer oper ates the fol lowing:



Paper loading



Paper feeding



Pumping

The gate array E05B 33 (IC6) outputs the phase dri ve cont rol signals (PFAPH and PF BPH), phase data (PFA0/1 and PPFB1/0) and vol tage referenc e data (PFV) t o the driver I C UDN2917EB (IC16). T he driver IC then controls the phase current based on the voltage r eference data. This sequence enables the micro step with a mi nimum of 1/720 inch at 2-2 phase.

E05B33 (IC6)

PFAPH

PFBPH

UDN2917EB (IC16)

23 24

43 26

I10

I11

I20

I21

PH1

PH2

VREF1

VREF2

PFA0

PFA1

PFB0

PFB1

PO0

PO1

PO2

PO3

+5V

PFV

Figure 2-23. PF Motor Driver Circuit Blo ck Diagram

PF Motor

PF A

PF_A

PF B

PF_B

Rev. A

2-2

EPSON Stylus

COLOR

1520

2.3.2.5 Printhead Driver Circuit

This printer has 2 separate printhead driver circuits:for the black head and for the color head. Each circui t has the com m on vol tage dri ver ci rcui t att ached to t he MAI N board and t he nozzl e select i on c ir cui t attached to the head dri v er ci rcuit board. The com m on driv er ci rcui ts for t he both bl ack and color heads are composed of the hybrid ICs (IC19) and the terminal transistors. 128-bit transfer gate array IC IR2C72C is used for the black head nozzle selec tion cir cuit and 128-bi t transfer gate array IC IR2C72C (for cyan and yellow) and 64-bit transf er gate array IC IR2C73C (for magenta) are used f or the color head nozzle select ion circui t. Pri nting data i s separated into the com mon v oltage si gnal and t he nozzle selection signal at the gate array E05B33 (IC6) and is then transferred to the corresponding circuit. Figure 2-24 shows the printhead dr iv er c ircuit block diagram.

E05B33 (IC6)

BCHG,BKC

BND0/1,BMD0/1

SBDATA

BHCLK

BHLAT

BA/BHDATA

BHNCHG

VHPR

SCLK,SSTB,SCLR

CCHG,CKC

CND1/2,CMD1/2

SCDATA

CHCLK

CHLAT

YHDATA

CHDATA

MHDATA

CHNCHG

Common Driver

CN13

CN12

IR2C72C

COM

CLK LAT SI NCHG

VHV

IR2C72C

COM

CLK LAT S3

NCHG

VHV

IR2C73C

COM

CLK

LAT

VHV

Black Head

Cyan

Yellow

Magenta

2-2

C211 MAIN Board

Head Driver Circuit

Figure 2-24. Prinrhead Driver Circuit Block Diagram

Rev. A

Operating Principles



Common driver circuit f or the black head

Gate array E05B 33 ( IC6) sends serial data to t he head noz z le selecti on c ircuit on the head to select nozzles to activ ate. Then the dat a is transferred to the common driver on the c ontrol board to dr iv e all pi ez os that are corresponding to eac h noz z le. The operat ing principles for the black head i s as follows:



Nozzle selection circuit Nozzles for the black head are divided into 2 rows with 64 nozzles on each, and 2 deferent types of nozzle select ion signal (BAHDATA and BBHDATA) are sent in serial data t o the corresponding row. Clock signal (BHCLK) is composed of t he pulses from #1 to #64. The nozzles to be activated i s deter mined by t he noz z le selecti on si gnal synchronized wit h the clock signal by the latch signal (BHLAT). However, the numbers used f or the pulses and corresponding nozzl es are not the same.



Common dr iv er c ircuit The common v oltage (VH) is established to correspond to eac h of the bl ac k pr inthead characteristics. This value is stored in advance i n t he EEPROM when the printer power is off. At power on, the v alue is stored in t he RA M . The gate array E 05B 33 ( IC6) refer s to the value for the comm on vol tage when outputting t he serial data SBDATA as the voltage cont r ol signals to the comm on dr iv er c ircuit . The serial data transmi ssion control signal s (SCLK , SSTB and SCLR) ar e used for thi s operat ion. The ther mistor controls the common voltage by outputting the signals to compensate for changes in ink vi scosity.

BA/BHDATA

BHCLK

BHLAT

BHNCHG

COM

BKC,BCHG

BND0/1,BMD0/1

Figure 2-25. Black Data Transmission Timing

#64

Head Drive Voltage (VH)

Rev. A

2-2

EPSON Stylus



Color head nozzle selector circuit

COLOR

1520

The operating pr incipl e for the color head is the same as for the blac k head except that color print is performed with data for 3 different colors: yellow, cyan, and magenta. The oper ating princ iple for the color head is as described below:



Nozzle selection circuit The nozzles for the color head ar e div ided into 3: for yel low, cyan, and magenta with 64 nozz les for each of them . The nozzle sel ec tion signals for each color ( Y HDATA for yellow, MHDATA for magenta and CHDATA for magenta) are sent simultaneously in serial dat a. The clock si gnal (CHCLK) is com posed of the pulses fr om #1 to #64. T he noz z le selecti on si gnal and the corresponding cloc k si gnal are synchronized by the latch signal (CHLAT) to determine the nozzle to use. However, the num ber s used f or the pulses and corresponding nozzl es are not the same.



Common dr iv er c ircuit The common v oltage (VH) is established to correspond to eac h of the bl ac k pr inthead characteristics. This value is stored in advance i n t he EEPROM when the printer power is off. At power on, the v alue is stored in t he RA M . The gate array E 05B 33 ( IC6) outputs the serial data SCDATA of the voltage control signal s to the common driver cir c uit referring to this v alue. The control signals for the serial transm ission SCLK, SST B and S CLR ar e used for this operat ion. The therm istor controls the common voltage by output ting the signals to compensate for changes in ink viscosity.

YHDATA

CHDATA

MHDATA

CHCLK

CHLAT

CHNCHG

COM

CKC,CCHG

CND0/1, CMD0/1

Figure 2-26. Color Data Transmission Timing

#64

Head Drive Voltage (VH)

2-2

Rev. A

Operating Principles

2.4 Ink System Management

This section explai ns how the ink system is control led t o protect t he print heads and to ensure the output in high qual ity. The ink system consi sts of following operations:



Power On



Initialization



Ink Cartridge Replacem ent



Cleaning



Print Start



Flushing



Waiting



False Absorbing



Wiping



Rubbing



Micro Absorbing



Carriage Lock The printer also selects an ink sequence based on the pri nter condit ion by ref erring to t he val ue for the timer counter I C that has a back-up li t hium bat tery and ti m er counter stored i n the EEPRO M. T he pri nter has foll owing c ounters:



Protect Count er A



Protect Count er C



Ink Consumption Counter



One-time Flag

2.4.1 Ink System Operations

The ink system oper ations are as described below.



Power on

Performed when the printer is turned on. It per form s a cleaning sequence by referring to the counter value.



Initialization

Performed when the printer r ec eiv es the initialization com mand. The CR returns to the home posi tion during thi s operat ion.



Ink Cartridge Replacement

Performed through the c ontrol panel oper ation when the ink car tridge needs replacing. It determi nes whether the ink cartridge is i nstalled and performs cl eaning sequence if nec essary.



Cleaning

Performed to solve decline in pri nt qualit y c aused by t he abnor mal nozzle status such as nozzle clogging and inaccurate i nk ejection.



Print Start

Performs the cleaning or flushing operation before the printer starts printing after power on.



Flushing

Performed to ejec t few ink dot s during printing to prevent ink from increasing viscosity.



Waiting

Performs the flushing operati on after t he pr inting operation to avoid nozz le cloggi ng c aused by t he viscous ink.



False Absorbing

Absorbs the ink inside the cap and eliminates the ink on the nozzle plate after ink is absorbed.



Rubbing

Performed to elimi nate the ink and dust t hat adheres on the nozzle surface. Few dots of ink is absorbed to moisten the nozzle surface prior t o this operation.



Micro Absorbing

Performed to ejec t bubbles formed inside t he c avi ty.



Carriage Lock

Locks the carriage when turning off the printer or no pr inting is performed for 5 minutes with t he printer power on.

Rev. A

2-2

EPSON Stylus

COLOR

1520

2.4.2 Counters

This printer i s equipped with fol lowing counters. T he v alues f or the counters are stored in the EEPRO M on the MAIN cont r ol board.



Protect Counter A

This counter is used to manage the tot al amount of drained ink. If the counter val ue exceeds 65,000, the mai ntenance error occurs and the c ur r ent printing job stops consequently. (Refer t o S ec tion

1.4.11.) This error requires EEPROM clear and waste ink drain pad replacem ent. (Refer t o Sect ion

1.4.3 and Section 3.2.9.) The current value for thi s count er c an be found in t he default setting mode. (Refer to Section 1.4.5.) To reset the counter, perform EEPRO M clear through the control panel operation or by r unning the adjusting program.



Protect Counter C

This counter is used to manage the am ount of i nk flushed at t he left waste ink dr ain pad located at left end of the paper eject dri ve uni t. The counter val ue c or r esponds to the ink amount ac c umulated in the pad. I f the count er val ue exceeds the specified value, the maintenance error is i ndicated and the current printing job stops consequently. (Refer to Section 1.4.11.) With an occur r enc e of thi s error, the waste ink drain pads must be r eplaced. (Refer to Sect ion 1.4.3 and Section 3.2.9.) the current value for this count er c an be found in t he default setting mode. (Refer to Section 1.4.5.)



Black/Color One-time Flag

This flag set in the EEPROM sets a li mit t o prevent user from performing frequent initial ink charge operation. Nor mall y the init ial ink c har ging is perf or med when the user starts using a new printer only. The fl ag is reset by the EEPROM clear operation through the control panel or adjusting program.



Ink Consumption Counter

This counter monitors the amount of ink used throughout the printing, cleaning, and flushing operations af ter a new cartridge is installed. The value is referred to deter mine the amount of ink remaining in the car tridge. T his counter is reset when the cart r idge is removed.

CAUTION

Be sure to replace the waste ink drain pads and t he left ink pad when t he EEPROM is cleared. (Refer to Chapter 3.)

2-2

Rev. A

Chapter 3

Disassembly and Assembly

3.1 Overview...............................................................................................................3-1

3.1.1 Precautions for Disassembling the Printer...................................................................... 3-1

3.1.2 Tools .................................................................................................................................. 3-2

3.2 Disassembly and Assembly................................................................................ 3-3

3.2.1 Upper Housing Removal................................................................................................... 3-4

3.2.2 ROM Rep lacement............................................................................................................. 3-6

3.2.3 Prin t Head Removal .......................................................................................................... 3-7

3.2.3.1 Bl ac k Head Removal............................................................................................ 3-7

3.2.3.2 Color Head Removal............................................................................................ 3-8

3.2.4 Home Position (HP) Sensor Removal .............................................................................. 3-9

3.2.5 Cover Open Sensor Removal ..........................................................................................3-10

3.2.6 Prin t er M echanism Uni t Removal.................................................................................... 3-11

3.2.7 PSB/PSE Board Assembly Removal ...............................................................................3-12

3.2.8 C211 MAIN Board Assembly Removal .............................................................................3-13

3.2.9 Waste Ink Drain Pad Removal..........................................................................................3-15

3.2.9.1 Waste Ink Drain Pad Removal .............................................................................3-15

3.2.9.2 Left Ink Pad Removal..........................................................................................3-15

3.2.10 Prin t er M echanism Uni t Disassembly ...........................................................................3-16

3.2.10.1 Carriage (CR) Motor Assembly Removal ...........................................................3-16

3.2.10.2 PF ( P aper Feed) Motor Assembly Removal.......................................................3-18

3.2.10.3 DE (Disengage) Sensor Removal ......................................................................3-19

3.2.10.4 Front/Rear PE (Paper E nd) S ensor Remov al.....................................................3-20

3.2.10.5 REL (Release) Sensor Removal........................................................................3-21

3.2.10.6 Edge Guide Unit Remov al .................................................................................3-22

3.2.10.7 Paper Eject Frame Removal..............................................................................3-23

3.2.10.8 Pump Unit Removal ..........................................................................................3-24

3.2.10.9 Carriage (CR) Unit Removal..............................................................................3-25

3.2.10.10 Base Frame Assembly Removal......................................................................3-27

3.2.10.11 Paper Load Roller Unit Removal......................................................................3-28

3.2.10.12 Paper F eed ( P F) Roller Removal .....................................................................3-31

3.2.10.13 Rear Paper Guide Removal.............................................................................3-32

3.2.10.14 Middle Frame Assembly Removal ...................................................................3-33

Disassembly and Assembly

3.1 Overview

This section describes procedures for disassembling the m ain components of EPSON Stylus COLOR

1520. Unless otherwise specif ied, disassembly units or components can be reassembled by reversing the disassembling procedure. Therefore, no assembly procedur es are included i n this section. Precaut ions for any disassembly or assembly procedure are described under the heading “WORK POINT”. Any adjustment required after disassembling the units are described under the heading “REQUIRED ADJUSTMENT”.

3.1.1 Precautions for Disassembling the Printer

See the precaution below when disassembli ng and assembling EPSON Stylus COLOR 1520.

WARNING

Disconnect the power cable before disas s em bling and as s em bling the printer.

 

Wear protective goggles to protect your eyes from ink. If ink gets in y our eyes, f lush the eye w ith fresh wat er and s ee a doc tor immediately.



If ink comes into contact with your skin, wash it off with soap and water. If irritation occurs, contact a physician.



Be carefully not to get ink in your eyes. In case ink gets in y our eyes, flus h it w ith f resh w at er and see a doctor immediat ely.



A lithium batter y is ins talled on the main board of this printer. Be sure to obser v e the following instructions when servicing t he battery:



Keep the battery away from any m etal or other batt er ies s o that electrodes of the opposite

polarity do not come in c ontact with each other.



Do not heat the battery or put it neat fire.



Do not solder on any part of the batter y. (Doing so may result in leakage of electroly te from the

battery , bur ning or ex plos ion. the leakage may af fect other devic e c los e to the battery.)



Do not charge the battery. (An explosive may be generated inside the battery, and cause

burning



or explosion.)



Do not dismantle the battery. (The gas inside the battery may hurt y our throat. Leakage ,

burning

or explosion may also be resulted.)



Do not install the bat tery in the w r ong dir ec tion. (This may c aus e bur ning or ex plos ion.)

CAUTION

Danger of explosion if t he battery is incorrect ly replaced. Replace only with the same or equivalent type recommended by the manufacture. Dispose t he used bat tery according t o governm ent’s law and regulations.

ATTENTION

Risqué d’explosion si la pile est rem placèe incorrectment. Ne remplacer pue par une pile du même type ou d’un type équivalent r ec om m andé par le fabricant. E lim enir les piles déc har gées s elon les lois et les règles de sécurité en vigueur.

Rev. A

3-1

EPSON Stylus

COLOR

1520

CAUTION



Never remove the ink c ar tridge from t he c ar r iage unles s m anual s pec ifies to do so.



When transport ing the printer after installing t he ink cartridge, be s ure to pack t he printer for

transportat ion without rem ov ing the ink cartridge.



Use only recommended tools for disassembling, as s em bling or adjus ting the printer.



Apply lubricants and adhesiv es as s pec ified. (See Chapter 6 for details.)



Make the specified adjus tments w hen y ou dis as s em ble the printer. (See Chapter 4 for details.)

3.1.2 Tools

Make sure you use the tools listed in the foll owing table.

Table 3- 1. Tools

Tools Distributor Part No.

Phillips screwdriver no.1 EPSON B743800400 Phillips screwdriver no.2 EPSON B743800200 Standard screw driver EPSON B743000100 Nippers EPSON B740500100 Thickness Gauge EPSON B776702201 Tweezers EPSON B741000100

Rev. A

Disassembly and Assembly

3.2 Disassembl y and Assem bly

This section descri bes disassembly and assembly proc edures for the pri nter assembli es and parts. See the precauti ons i n S ec tion 3.1.1 when disassembl ing and assembling.

CAUTION

See the precautions in S ec tion 3.1.1 prior to disassembly and assem bly.

START

Upper Housing Removal

Printer Mechanism

Unit Removal

PSB/PSE Board

Removal

Printer Mechanism Disassembly

CR Motor Assembly Removal

Detection Sensor Removal

Paper Eject Frame Removal

ROM Replacement

Printhead Removal

Cover Open Sensor Removal

Main Board

Removal

PF Motor Assembly REmoval

Front/Rear PE Sensor Removal

HP Sensor Removal

Waste Ink Drain

Removal

Pad

Edge Guide Removal

Release Sensor Removal

Carriage Unit Removal

Base Frame Assembly Removal

Paper Load Roller Removal

PF Roller Removal

Front Paper Guide Removal

Pump Unit Removal

Middle Frame Assembly Removal

Figure 3-1. Disassembly Flowchart

Rev. A

EPSON Stylus

COLOR

1520

3.2.1 Upper Housing Removal

1. Remove the knob, release l ever, rear sheet guide, output tray, and paper support.

2. Remove the tractor unit by rel easi ng the hook using the tweezers, then r emove it from t he pr inter mechanism unit by lif ting up the rear edge of the tr ac tor unit.

Hook in the Tractor Unit

Tweezers

Tractor Unit

Figure 3-2. Tractor Unit Removal

3. Open the printer c over, and insert t he tweezers into the cut outs at the back of the Panel Unit to release the hooks securing the panel unit t o the upper housing. Then disconnect the connect or c able for the P anel Unit and remove the Panel Unit.

Connector Cable for the Panel Unit

Tweezers

Control Panel

Upper Housing

Figure 3-3. Panel Unit Removal

Rev. A

Disassembly and Assembly

4. Remove 3 screws (CBB, 3X12) and 2 screws (CBB, 4X2) securing the upper housing t o the lower housing.

5. Insert the tweezers int o the cutouts at the bottom of the upper housing t o r elease the hooks fi xing the upper housing to the lower housing. Then remove the upper housing.

WORK POINT

After replacing the upper housing or printer cover, be sure to attach the label such as the



CAUTION label to the s pec ified position.

Release Lever

Knob

Knob Sheet

Printer Cover

Screw (CBB 3X12)

Screws (CBB 4X20)

Tractor Unit

Rear Sheet Guide

Control Panel

Screws (CBB 3X12)

Upper Housing

Rev. A

Lower Housing

Hooks Fixing the Lower Housing

Figure 3-4. Upper Housing Removal

EPSON Stylus

COLOR

1520

3.2.2 ROM Replacement

1. Remove 1 screw (CBP, 3X8) securi ng the ROM cover to the lower housing, and remove the ROM cover.

2. Remove the ROM.

CAUTION

Never replace the ROM before unplugging the power c able.



Rev. A

Disassembly and Assembly

3.2.3 Print Head Removal

3.2.3.1 Black Head Removal

1. Remove the upper housing. (Refer to Sec tion 3.2.1.)

2. Remove the ink car tridge if it is install ed.

3. Remove the FFC holders from the fr ont lef t corner of the CR unit. Then release the FF Cs by pulling them toward the pr inthead side.

4. Disconnect the bl ac k head FFC fr om the blac k head c onnec tor.

5. Remove the cartridge lever.

6. Remove the compr ession spri ng fixing the black head to the CR unit.

7. Remove the head fixi ng screw securi ng the black head to the CR unit.

8. Shift the black head forward then remov e the black head by lif ting it upward.

Black Cartridge Lever

Color Cartridge Lever

Black Head

Compression Spring

FFC for the Color Head

FFC for the Black Head

Screw

Color Head

Fitting

Carriage Unit

Figure 3-5. Black/Color Head Removal

Rev. A

EPSON Stylus

COLOR

1520

3.2.3.2 Color Head Removal

1. Remove the upper housing. (Refer to Sec tion 3.2.1.)

2. Remove the ink car tridge if it is install ed.

3. Remove the FFC holders from the fr ont lef t corner of the CR unit. Then release the FF Cs by pulling them toward the pr inthead side.

4. Disconnect the color FFC from t he c olor head connector.

5. Remove the Cartridge Lever.

6. Remove the compr ession spri ng fixing the black head to the CR unit.

7. Remove the screw securing the color head to the CR uni t.

8. Shift the color head forward then remov e it by lift ing upward.

WORK POINT

When removing the blac k head, be careful not t o c atch the color head FFC.

 

Be careful not t o dam age the Head FFCs when pulling them from the corner of the CR unit.

REQUIRED ADJUSTMENT



After replacing the head, perform the following: (Refer to Chapter 4, Adjustment .)



Head data writing



Head angle adjustment



Head vertical adjustm ent



Head gap adjustment

Rev. A

Disassembly and Assembly

3.2.4 Home Position (HP) Sensor Removal

1. Remove the upper housing. (Refer to Sec tion 3.2.1.)

2. Disconnect the connector cable from t he HP sensor connect or.

3. Release the hooks fi xing the HP sensor to t he paper eject frame using t he tweezers, then remove the HP sensor.

WORK POINT

After reass embling the HP sens or to the paper ejec t frame, be sure to f ix the hooks t o the frame



using the specified adhesiv e. (Refer to Chapter 6.)

HP Sensor

Paper Eject Frame

Rev. A

Tweezers

Figure 3-6. HP Sensor Removal

Connector Cable for the HP Sensor

EPSON Stylus

COLOR

1520

3.2.5 Cover Open Sensor Removal

1. Remove the upper housing. (Refer to Sec tion 3.2.1.)

2. Disconnect the cover open sensor connector c able from the cover open sensor connector.

3. Release the hooks fi xing the Cover O pen S ensor t o the paper eject fram e usi ng the tweezers then remove the Cover Open Sensor.

Cover Open Sensor

Figure 3-7. Cover Open Senso r Removal

Hook

3-1

Rev. A

Disassembly and Assembly

3.2.6 Printer Mechanism Unit Removal

1. Remove the upper housing. (Refer to Sec tion 3.2.1.)

2. Disconnect the connector cables f r om the connect or s CN3, CN4, CN8, CN9, CN10, CN11, CN12, CN13, CN14, and CN15 on the C211 MAIN Board.

3. Remove 4 screws (CBB, 4X14) securing the printer mec hanism unit to the lower housing.

4. Lift up the printer mechanism unit and rem ove i t.

WORK POINT

Be sure to lubricate the front top edge of the paper eject frame after installing the ASP printer



mechanism unit, which is not lubric ated.

REQUIRED ADJUSTMENT



After replacing the printer mechanis m unit, perform the following: (Refer to Chapter 4.)



Input the head data whic h is m ar k ed on the package.



Bi-directional adjust m ent.

Screws (CB 4X14)

Printer Mechanism Unit

Screws (CB 4X14)

Rev. A

Lower Housing

Figure 3-8. Printer Mechanism Removal

3-11

EPSON Stylus

COLOR

1520

3.2.7 PSB/PSE Board Assembly Removal

1. Remove the upper housing. (Refer to Sec tion 3.2.1.)

2. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

3. Disconnect the power cabl e c onnec tor from CN1, and the C211 MAIN board connector c able from the CN2.

4. Remov e 4 screws (CBP, 3X12) securing the PSB/PSE Board t o t he lower housing, and remov e the PSB/PSE Board.

WARNING

Make sure that the AC power cable is unplugged before disconnecting the power cable



connector.

Screws (CBP 3X12)

CN2

PSB/PSE Board

CN1

Lower Housing

Figure 3-9. PSB/PSE Board Removal

3-1

Rev. A

Disassembly and Assembly

3.2.8 C211 MAIN Board Assembly Remov al

1. Remove the upper housing. (Refer to Sec tion 3.2.1.)

2. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

3. Disconnect the connector cable for the PSB/PSE board from CN2, and the Control Panel FFC from CN7.

4. Remove 7 screws (CBP, 3X12) and 2 screws (CBS, M3X6) securing t he C211 MAIN board assembly to the lower housing. Then remove the C211 MAIN board assembly, along with the Type-B i nterface shield cover.

5. Remove 2 screws (CP, M3X6) securing t he Type-B interf ac e shi eld cover to the C211 MAIN board. Then remove the shield cover.

REQUIRED ADJUSTMENT

When the C211 MAIN board is replaced, be sure to reset the EEPROM prior to adjustments to



avoid a failure such as bugged dat a.

WARNING



Be careful when s er v ic ing the lithium Battery. (Refer to Section 3.1.1.)



Pay attention to the sharp edges of the shield cover.

Rev. A

3-1

EPSON Stylus

COLOR

1520

Screw (CP 3X6)

Screw (CBS 3X6)

Screw (CBP 3X12)

CN13

CN12

FFCs for the Heads

CN15

CN14

Screw (CBS 3x12)

CN4

CN3

Shield Cover for the

Screw (CBS 3X6)

Screw (CBP 3X12)

Type-B I/F

Connector Cable for ther Control Panel

CN5

CN8 CN9 CN10 CN11

Screw (CBP 3X12)

CN2

Screws (CBS 3x12)

Main Board Assembly

Lower Housing

Figure 3-10. C202 MAIN Board Removal

3-1

Rev. A

Disassembly and Assembly

3.2.9 Waste Ink Drain Pad Removal

Waste Ink Drai n P ads must be replaced when the pri nter is under the followi ng c onditions:



The v alue for the protect counter A has reached the specified value (65,000) and the maint enanc e r equest er r or is indicat ed.



The indic ated value of t he P r otect counter is more than 52, 000. (In thi s case, be sure to r eplace them by agreement with your c ustomer.



The protect c ounter C has reached the specified value and the maintenanc e r equest er r or for the left ink pad is i ndicated.)

(Refer t o S ec tion 1.4.11 and Section 2.4.2.2.)

3.2.9.1 Waste Ink Drain Pad Removal

1. Reset the EEPROM. (Refer to Section 1.4.2.)

2. Remove the upper housing. (Refer to Sec tion 3.2.1.)

3. Remove the print er mechanism . (Refer to Section 3.2.6.)

4. Remove the waste ink pads.

3.2.9.2 Left Ink Pad Removal

1. Reset the EEPROM. (Refer to Section 1.4.2.)

2. Remove the upper housing. (Refer to Sec tion 3.2.1.)

3. Remove the ink pad cover on t he left end of the paper eject drive uni t.

4. Remove the left ink pad.

WORK POINT

Protect count er value is indicated on the fir st line of the first page of the default setting sample



print, along with the ROM ver s ion num ber.

Ink Pad Cover

Left Ink Pad

Printer Mechanism Unit

Waste Ink Drain Pads

Paper Eject Drive Unit

Figure 3-11. Ink Drain Pad Remo val

Rev. A

3-1

EPSON Stylus

COLOR

1520

3.2.10 Printer Mechanism Unit Disassembly

This section describes how to disassemble and reassemble the units and parts in the M-4160 printer mechanism.

3.2.10.1 Carriage (CR) Motor Assembly Removal

1. Remove the print er mechanism unit. (Refer to 3.2.6.)

2. Release the timing belt by removing the extension spring.

3. Disengage the timing belt from the pulley on the CR motor assembly.

4. Turn the CR motor assembl y c ounter clock wise i n the order indi c ated with arrows to disengage the joint with the base frame assembly. Then remove the CR motor assembly by moving it toward the bottom edge of the motor f r ame.

Base Frame Asssembly

Drive Pulley

CR Motor

Timing Belt

Connector Cable for the CR Motor

Extension Spring

Figure 3-12. CR Motor Assembly Removal

5. Disconnect the CR motor assembly c onnec tor cable from t he c onnec tor on the CR motor assembly.

3-1

Rev. A

Disassembly and Assembly

WORK POINT



When mounting the CR motor, make sure that the connect or cable f or t he DE (disengage) sensor doesn’t cut in.



CR fan motor and the CR m otor assembly are 2 different part s . Therefore be sur e to attach the CR fan motor w hen r eplac ing the CR motor assem bly. Use the specif ied adhes iv e to attach the fan to the motor shaft. (Refer to Chapter 6.) Note the follow ing when attaching t he fan:



Do not insert the fan more than 1 mm from the shaft end.



Set the fan with the indented s ide facing outward.

(Refer to Chapter 6.)

CR Motor Assembly

Figure 3-13. Fixing the CR Motor Fan

(A) : 1 mm or less

Adhesive

Indented Side

Fan

Rev. A

3-1

EPSON Stylus

COLOR

1520

3.2.10.2 PF (Paper Feed) Motor Assembly Removal

1. Remove the print er mechanism unit. (Refer to 3.2.6.)

2. Remove the connector c able for the PF motor assembly from t he c onnec tor cable clump on the printer mechanism unit.

3. Remove 2 hexagon nuts securing the PF motor assembly to the middle frame using a spanner, then remove the PF m otor assembly.

WORK POINT

The pinion gear on the PF Motor Assembly is highly precise and t ends to rust easily. Therefore do



not touch it with your bare hand, or hit it with other objects.

PF Motor Assembly

Sub Frame Assembly

Figure 3-14. PF Motor Assemb ly Removal

Hexagon Nuts (M3)

3-1

Rev. A

Disassembly and Assembly

3.2.10.3 DE (Disengage) Sensor Removal

1. Remove the print er mechanism unit. (Refer to 3.2.6.)

2. Using the tweezers, release the hook s fix ing the DE sensor to the cam select assembl y, then remove the DE sensor.

3. Remove the connector c able from the connect or for the DE sensor.

Connector Cable for the DE Sensor

Cam Select Assembly

Tweezers

Hook fixing the DE Sensor

Figure 3-15. DE Sensor Removal

DE Sensor

Rev. A

3-1

EPSON Stylus

COLOR

1520

3.2.10.4 Front/Rear PE (Paper End) Sensor Removal

1. Remove the print er mechanism unit. (Refer to 3.2.6.)

2. Using the tweezers, release the tubs fixing the F r ont/Rear PE sensors to the rear paper guide at the bottom of the printer mec hanism unit .

3. Disconnect the connector cables f or the PE sensor from the PE sensor connectors.

Rear Paper Guide Assembly

Connector Cable for the Rear PE Sensor

Rear PE Sensor

Connector Cable for the Front PE Sensor

Figure 3-16. Front/Rear PE Sensor Removal

Hooks

Front PE Sensor

3-2

Rev. A

Disassembly and Assembly

3.2.10.5 REL (Release) Sensor Removal

1. Remove the print er mechanism unit. (Refer to 3.2.6.()

2. Using the tweezers, release the tabs fxing the REL sensor to the l eft frame assembly. Then remov e the REL sensor.

Tweezers

Tab Fixing the Release Sensor

Figure 3-17. REL Sensor Removal

Release Sensor

Connector Cable for the Release Sensor

Rev. A

3-21

EPSON Stylus

COLOR

1520

3.2.10.6 Edge Guide Unit Removal

1. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

2. Release the joints for the edge guide unit and the r ight and left paper l oad r oller slide cov er s.

3. Remove 2 fl ange nuts (M4) securing the edge guide unit to the lef t and middle frame assembli es. Then remove the edge guide unit.

Right Slide Cover

Main Bottom Frame

Left Slide Cover

Left Frame Assembly

Flange Nut

Middle Frame Assembly

Flange Nut

Damper

Rack

Edge Guide Unit

Figure 3-18. Edge Guide Unit Removal

WORK POINT

When installing the edge guide unit to the printer mechanism unit, be sure to engage t he damper



pinion with the rac k on the release transm is s ion lev er.



When installing the edge guide unit to the printer mechanism unit, engage the edge guide unit with the main bottom fram e, as shown in the figure below.



Fix the flange nut s with adhesive af ter fastening t hem . (Refer to Chapt er 6.)

Main Bottom Frame

Figure 3-19.

Engagemen t of the Edge Guide with the Main Bottom Frame

Edge Guide Unit

3-2

Rev. A

Disassembly and Assembly

3.2.10.7 Paper Eject Frame Removal

1. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

2. Disconnect the connector cables f or HP sensor and cover open sensor from the connect or s.

3. Remove 3 screws (CBS, M3X6) securing the paper eject frame to the printer mechanism unit.

4. Remove the paper eject frame by releasing the joint s.

Screw (CBS 3X6)

Paper Eject Frame

Screws (CBS 3X6)

Printer Mechanism Unit

Figure 3-20. Paper Eject Frame Removal

WORK POINT

When removing the paper ejec t frame, place a c lean piec e of paper between t he platen sur face in



the front paper guide as s em bly and pr intheads in the CR unit t o pr otect the print heads .

Rev. A

3-2

EPSON Stylus

COLOR

1520

3.2.10.8 Pump Unit Removal

1. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

2. Remove the paper eject frame. (Refer to Section 3.2.10.7.)

3. Remove 2 screws (CBS, 3X6 and CBP, 3X8) securi ng the pump unit to the pri nter mechanism unit. Then remove the pump unit.

Head Cleaner

Screw (CBS 3X6)

Pump Unit

Head Cleaner Lever

Right Frame Assembly

Middle Frame Assembly

Screw (CBP 3X8)

Figure 3-21. Pump Unit Removal

WORK POINT

When mounting the head c leaner onto the pump unit , set t he rubber part of the cleaner f acing to



the pump side.

3-2

Rev. A

Disassembly and Assembly

3.2.10.9 Carriage (CR) Unit Removal

1. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

2. Remove the ext ensi on spring to release the t imi ng belt. (Refer to the step 2 in Secti on 3.2.10.1.)

3. Disengage the timing belt from the pulley and sub pulley in the CR mot or assembly.

4. Remove 2 E-rings and 2 plain washer from the both edges of the CR guide shaft .

5. If the head c leaner lever in the pump unit is locking the CR unit, push the lever down manually to release the CR unit .

6. Remove 1 securing the head FFCs and FFC holders to t he base frame assembly. Then remove the head FFC and FFC holder fr om the pri nter mechanism unit.

7. Turn the parallel ism adjust bushings j oining the CR guide shaft to the right and left fram e assemblies until they fit into the cutouts on the frames. T hen r emove the CR unit along with the CR gui de shaft.

8. Remove the CR guide shaf t from the CR unit .

Parallelism Adjust Bushing

E-ring

Plain Washer

Screws Fixing the CR

CR Guide Shaft

Head FFC

CR Unit

Printer Mechanism Unit

Screw Securing the Head FFCs and FFC Holder

Figure 3-22. CR Unit Removal

PG Adjust Lever

Plain Washer

E-ring

Parallelism Adjust Bushing

Rev. A

3-2

EPSON Stylus

COLOR

1520

WORK POINT



After remov ing the CR unit, do not touch and dam age the heads. Protect t he heads from stat ic electricity, because the head drive c ir c uit is directly at tached to the head board.



Pay attention to the oil pad when removing the CR guide shaft from the CR unit. It tends to dislocate.



When installing the CR guide s haft to the printer mechanism unit, be sure to fit the plat en gap adjust lever to t he r ight frame assem bly. (Refer to the figure below.)

REQUIRED ADJUSTMENT



Perform platen gap adjustment, Bi-directional adjustment, and Uni-directional adjustment after installing the CR unit and parallelis m adjus t bushings. (Ref er to Chapter 4.)



If the printheads are replaced along with the CR unit, be sure to wr ite head data t o the EEPRO M. (Refer to Chapter 4.)

WORK POINT



When engaging the timing belt to t he CR unit, note 2 par ts of the belt: flat par t and toot h par t. B e sure to position t he 2 par ts of the t im ing belt as shown in the figure below.

CR Motor Assembly Side

Timing Belt

CR Assembly Side

Figure 3-23. Timing Belt Installation

Flat

3-2

Rev. A

Disassembly and Assembly

3.2.10.10 Base Frame Assembly Removal

1. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

2. Remove the paper eject frame. (Refer to Section 3.2.10.7.)

3. Remove the CR unit. (Refer to Section 3.2.10.9.)

4. Remove 1 E-ring fixing the gear (46) and compression spring (1.96) to the left frame assembly. Then remove the gear along with 2 plain washers and the compression spring.

WORK POINT

Be careful not to lose the compression spring. It might spring out when you remove the E-ring.



5. Remove the tract or r elease cam.

6. Adjusting the sub tr ac tor release cam wi th the cutout in the left frame assembl y, and remove it from the tractor r elease shaft. (Refer to t he figure below.)

7. Remove 5 screws (CBS, 3X6) securing the base f r ame assembly t o the printer mechanism unit, then lift up the base f r ame assembly and remove it.

Base Frame Assembly

Tractor Release Shaft

Sub Tractor Release Cam

Screw (CBS 3X6)

Plain Washer

E-ring

Middle Frame assembly

Tarctor Release Cam

Gear 46

Compression Spring 1.95

Screws (CBS 3X6)

Right Frame Assembly

Left Frame Assembly

PF Roller Shaft

Figure 3-24. Base Frame Assembly Removal

Rev. A

3-2

EPSON Stylus

COLOR

1520

3.2.10.11 Paper Load Roller Unit Removal

1. Remove the print er mechanism unit. (Refer to Section 3.2.6.)

2. Remove the paper eject frame. (Refer to Section 3.2.10.7.)

3. Remove the CR unit. (Refer to Section 3.2.10.9.)

4. Remove the base frame assembly. (Refer t o S ec tion 3.2.10.10.)

5. Attach the knob to the PF roller shaft, and press the trigger lev er down. Then rotate the paper load roller unit by turning the knob cl oc k wise to hold the edge guide unit down.

6. Remove 1 screw (CBP, 3X8) securi ng the paper eject dr iv e unit to the left fram e assembly, and remove the paper ej ec t drive unit by lifting up the front edge.

Paper Eject Drive Unit

PF Roller Unit

Screw (CBP 3X8)

Trigger Lever

Left Slide Cover in the Paper Load Roller Unit

Edge Guide Unit

Right Slide Cover in the Paper Load Roller Unit

Figure 3-25. Paper Eject Drive Unit Removal

7. Release the joints for the right and left sli de c overs and the edge guide.

8. Remove the E-ring l ocat ed at lef t end of the paper load roller .

9. Adjust the paper l oad r oller bushing with the cutout on the right frame.

10. Disengage the paper load gear at the right end of the paper load roller unit f r om the ASF transmission gears i n the middle frame. Then remove the paper load roller uni t by slidi ng it toward the left fr ame assembly.

3-2

Rev. A

Disassembly and Assembly

Bushing

E-ring

ASF Tarnsmission Gear Set

Paper Load Shaft

Gear (PF Roller)

Bushing

PF Roller

Figure 3-26. Paper Load Roller Removal

Edge Guide

Rev. A

3-2

Epson Stylus 1520 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

EPSON Stylus COLOR 1520

NOTICE

PRECAUTIONS

TABLE OF CONTENTS

Printable Area

Adjust lever

Black Ink Cartridge

Color Ink Cartridge

Input data buffer :64 Kbytes

Pump Mechanism

Tools Distributor Part No.

Disassembly and Assembly

3.2.10.1 Carriage (CR) Motor Assembly Removal

3.2.10.2 PF (Paper Feed) Motor Assembly Removal

3.2.10.3 DE (Disengage) Sensor Removal

3.2.10.4 Front/Rear PE (Paper End) Sensor Removal

3.2.10.5 REL (Release) Sensor Removal

3.2.10.6 Edge Guide Unit Removal

3.2.10.7 Paper Eject Frame Removal

3.2.10.8 Pump Unit Removal

3.2.10.9 Carriage (CR) Unit Removal