Epson 1520 Service manual

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EPSON

EPSON Stylus COLOR 1520

SERVICE MANUAL

COLOR INK JET PRINTER

SEIKO EPSON CORPORATION

4007394

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NOTICE

without SEIKO EPSON’s express written permission is forbidden.

The contents of this manual are subjects to change without notice. All efforts have been made to ensure the accuracy of the contents of this manual.

However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The above notwithstanding SEIKO EPSON can assume no responsibility f or any errors

in this manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

General Notice:

Other product names used herein are for identification purposes only and may be trademarks or registered trademarks of their respective companies.

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PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury 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 res ult in ser ious or f atal per sonal 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 WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL. DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CO NNECTED, USE EXT REME CAUT ION IN W O RKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

CAUTION

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

2. MAKE CERTAIN THAT T HE SOURCE VOLT AGE IS THE SAME AS T HE RATED VOLT AGE, 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 T HE EPSON PRODUCT HAS BEEN DISCONNECT ED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

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

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

iii

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PREFACE

This manual descr ibes functions , theory of electrical and m echanical operations , maintenanc e, and repair of Stylus COLOR 1520. The instructions and procedur es included herein are intended for the experience r epair technician, and attention should be given to die precautions on the preceding page. The Chapters are organized as follows:

CHAPTER 1. GENERAL DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of the printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes 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.

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REVISION SHEET

Revision Issued Data Contents

Rev. A FEBRUARY 25 1997 First issue

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

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Chapter 1

Product Description

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

1.2 Specification............................................................................................................3

1.2.1 Printing Specifications.............................................................................................................. 3

1.2.2 Control codes ............................................................................................................................ 4

1.2.3 Character tables......................................................................................................................... 4

1.2.4 Paper Feeding............................................................................................................................ 5

1.2.5 Paper Specification ................................................................................................................... 6

1.2.5.1 Cut Sheet...................................................................................................................... 6

1.2.5.2 Transparency ............................................................................................................... 6

1.2.5.3 Envelope....................................................................................................................... 6

1.2.5.4 Index Card.................................................................................................................... 6

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

1.2.5.6 Continuous Paper......................................................................................................... 7

1.2.5.7 Labels (Continuous).....................................................................................................7

1.2.5.8 Banner.......................................................................................................................... 7

1.2.6 Printable Area ............................................................................................................................ 8

1.2.7 Adjust Lever............................................................................................................................. 11

1.2.8 Ink Specification...................................................................................................................... 12

1.2.8.1 Black ink cartridge...................................................................................................... 12

1.2.8.2 Color ink cartridge...................................................................................................... 12

1.2.9 Input Data Buffer ........................................................................................................ ............. 12

1.2.10 Electric Specifications .......................................................................................................... 13

1.2.11 Environmental Conditions.................................................................................................... 13

1.2.12 Reliability................................................................................................................................ 14

1.2.13 Safety Approvals ................................................................................................................... 14

1.2.14 CE Marking............................................................................................................................. 14

1.2.15 Acoustic Noise....................................................................................................................... 14

1.3 Interfaces................................................................................................................15

1.3.1 Parallel Interface...................................................................................................................... 15

1.3.1.1 Forward Channel Specifications................................................................................. 15

1.3.1.2 Reverse Channel Specifications ................................................................................ 17

1.3.2 Mac Serial Interface................................................................................................................. 18

1.3.2.1 Serial Interface Specifications.................................................................................... 18

1.3.3 Optional Interface.................................................................................................................... 19

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

1.3.5 Interface Selection................................................................................................................... 20

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

1.4 Operation................................................................................................................21

1.4.1 Control Panel ........................................................................................................................... 21

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

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

1.4.4 Cover Open Sensor Operation...............................................................................................25

1.4.5 Default Setting ......................................................................................................................... 25

1.4.5.1 Setting Method ........................................................................................................... 25

1.4.5.2 Setting Menus............................................................................................................. 27

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1.4.6 Printer Adjustment Mode ........................................................................................................29

1.4.6.1 Adjustment Method.....................................................................................................29

1.4.6.2 Adjustment patterns.................................................................................................... 29

1.4.7 Printer Initialization..................................................................................................................30

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

1.4.9 Hexadecimal Dump Function.................................................................................................. 30

1.4.10 Monochrome Printing Mode.................................................................................................30

1.5 Physical Specification .......................................................................................... 31

1.6 Main Components................................................................................................. 32

1.6.1 C211 MAIN Board..................................................................................................................... 32

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

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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:

High Speed Printing

400 cps for LQ mode 800 cps for draft mode

High print quality for color graphics

High Resolution :1440 (H) X 720 (V) dpi printing Colors :Cyan, Magenta, Yellow, Black Printing Method :Traditional and new micro weave printing Smaller dot diameter for image improvement

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

This printer holds :Envelope up to A2 size portrait

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

Built-in 2 interfaces and 1 optional interface card

Mac serial interface ( up to approximately 900 kbps) Bi-directional parallel interface (IEEE1284 level 1 device) Optional Type-B interface card

4 scalable fonts and 5 LQ fonts

Scalable fonts :Roman T, Sans Serif H, Roman, Sans Serif LQ fonts :Roman, Sans Serif, Courier, Prestige, Script 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 0-1. Exterior View of the EPSON Stylus COLOR 1520

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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)

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

which varies by country.

Table 0-1. Options and Consumables

Serial interface card 32 KB serial interface card 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 from D-SUB 25-pin (computer) to D-SUB 25-pin (printer) Serial interface cable from D-SUB 9-pin (computer) to D-SUB 25-pin (printer) Banner paper holder and cutting guide

Rev. A

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1.2 Specification

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

1.2.1 Printing Specifications

Printing method :On demand Ink jet 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

144/360 inch

#64

32/360 inch

#63

144/360 inch

#64

32/360 inch

#63

#64

Product Description

#63

#2 #3#4#1

Black

Paper feed direction

Cyan

Magenta

Yellow

Figure 0-2. Nozzle Configuration

Printing direction :Bi-directional with logic-seeking Printing speed and Printable columns

Table 0-2. 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 0-3. 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.

10 ips

Rev. A

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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

Legal and 14 international character sets

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

Typeface

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

 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 0-4. 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

Paper transport method :Friction feed with built-in auto sheet feeder (ASF) Line spacing :1/6, 1/8 inch or programmable at 1/360 inch Paper path :Cut-sheet ASF (Front entry)

:FF Rear tractor

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

88.9 mm / sec

3.5 inch / sec

Rev. A

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EPSON Stylus COLOR 1520

1.2.5 Paper Specification

1.2.5.1 Cut Sheet

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)”

Table 0-5. Cut Sheet Size

Paper Thickness :0.065 mm (0.0025”) to 0.11 mm (0.004”) Paper Weight :64 g/ m

:52 g/ m

Quality :Exclusive paper *

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

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

, Bond paper, PPC

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.

1.2.5.2 Transparency

Table 0-6. 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”)

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 0-7. 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)

Paper Thickness :0.16 mm (0.006”) to 0.52 mm (0.02”) Paper Weight :45 g/m Quality :Bond paper, Plain paper, Air mail

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

Note) Envelope printing is only available at normal temperatures.

Place the longer side of the envelope horizontally when setting.

1.2.5.4 Index Card

Table 0-8. Index Card Size

Size Width Length

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

Card Thickness :0.23 mm (0.0091”)

Rev. A

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1.2.5.5 Labels (Cut Sheet)

Table 0-9. Label Size

Size Width Length

A4 210 mm (8.3”) 297 mm (11.7”)

Letter 216 mm(8.5”) 279 mm (11.0”)

Paper thickness :0.2 mm (0.0079”) including base sheet Quality :Page printer label

Note) Label must be printed at normal room temperature.

1.2.5.6 Continuous Paper

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

:Folding length 101.6 mm (4”)

Paper thickness :0.065 mm (0.0026”) to 0.11 mm (0.0043”) Paper Weight :52 g/ m

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

1.2.5.7 Labels (Continuous)

Paper size

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

:Folding length 101.6 mm (4”)

 Label :Width 63.5 mm (2.5”)

:Length 23.9 mm (0.94”)

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

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

Quality :Plain paper

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

Product Description

1.2.5.8 Banner

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

:Length :5.0 m or less (196.9”)

Thickness :0.08 mm (0.0031”) to 0.1 mm (0.0039”) Weight :64 g/m Quality :Plain paper

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

Rev. A

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EPSON Stylus COLOR 1520

1.2.6 Printable Area

Cut Sheet

LM RM

Printable Area

Figure 0-3. Printable Area for Cut Sheet

Table 0-10. 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

Page 17

Envelope

Product Description

LM (Left Margin)

(minimum)

3 mm

(0.12”)

Printable area

Figure 0-4. Printable Area for Envelopes

Table 0-11. 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

Page 18

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 0-5. Printable Area for Continuous Paper

More than 134 mm (5.28")

Rev. A

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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 0-12. 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 0-6. Adjust Lever Settings

Rev. A

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EPSON Stylus COLOR 1520

1.2.8 Ink Specification

1.2.8.1 Black ink cartridge

Table 0-13. 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 0-14. 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°C, leave it for more than 3 hours at the room temperature to defrost 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”)

* 1 * 1 * 1 *2

1.2.9 Input Data Buffer

Input data buffer :64 Kbytes

Rev. A

Page 21

Product Description

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)

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 0-7. Environmental Conditions

Rev. A

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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)

Rev. A

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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 0-15. 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 0-8. 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)

0.5 us (min.)

0 (min.)

5 us (type.)

Figure 0-8. Data Transmission Timing

Rev. A

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EPSON Stylus COLOR 1520

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

Table 0-16. 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 0-17. 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.

Rev. A

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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 0-18. 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

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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 0-19. 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 0-9.

Serial Interface Connector Pin Assignment

Table 0-20. 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

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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 0-21.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 0-22. Supported Main Command and Sending Timing

Main Command No. Command name Sending Timing

01h Start Software Reset /INIT signal on the std. parallel I/F

Type-B I/F option command : 01h Cold Start

04h Send Name Data Type-B I/F command : 05h 07h Inquire Software Emulation Name Changing software Emulation Type 0Eh Inquire ASCII Message Writing to DBIN register 14h Inquire Emergency Reply Reply for Emergency command 15h Send Emergency Message Receive Emergency Command

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.

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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 Contr ol Codes

Printer languages and control codes :ESC/PC

:IBM X24E :EPSON Remote

Rev. A

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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 0-10 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 0-10. Control Panel Appearance

Alt

LF/FF

Cleaning

Load/Eject

Cleaning

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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 Function :Loads and ejects the paper.

Available condition :Pause/Stand-by

LF/FF Function :Feeds one line or page.

Available conditions :Pause / Stand-by

Pause 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

Micro-adjust ↑ Function :Feeds paper forward and is used to execute TOF

adjustment *

Available conditions :Pause / Stand-by

Micro-adjust ↓ Function :Feeds paper backward and performs TOF adjustment *

and Tear off adjustment *3.

Available conditions :Pause / Stand-by

Cleaning (Black)

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

and Tear off adjustment *3.

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.

Rev. A

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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 0-23. 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 ↑

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.

Enters default setting mode. (See Section 1.4.4.)

Enters EEPROM and Timer IC reset *

Function

mode.

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.)

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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 0-24. Printer Condition and Panel Status

Indicators

Printer status Power Cover Open Ink out

(black)

Power on On „Ÿ „Ÿ „Ÿ „Ÿ „Ÿ Cover open „Ÿ On „Ÿ „Ÿ „Ÿ „Ÿ Paper out „Ÿ „Ÿ „Ÿ „Ÿ On „Ÿ Paper jam „Ÿ „Ÿ „Ÿ „Ÿ Blinks „Ÿ No ink cartridge or ink end (black) Ink level low (black) „Ÿ „Ÿ Blinks „Ÿ „Ÿ „Ÿ No ink cartridge or ink end (color) Ink level low (color) „Ÿ „Ÿ „Ÿ Blinks „Ÿ „Ÿ Enter EEPROM and Timer IC reset Maintenance request Blinks Blinks Blinks Blinks Blinks Blinks Fatal error „Ÿ Blinks „Ÿ „Ÿ „Ÿ Blinks Lever error „Ÿ „Ÿ „Ÿ „Ÿ Blinks Blinks Capping function in the power off Data exit Blinks „Ÿ „Ÿ „Ÿ „Ÿ „Ÿ In the sequence of ink cartridge change mode Default setting mode Blinks „Ÿ „Ÿ „Ÿ „Ÿ „Ÿ

„Ÿ „Ÿ On „Ÿ „Ÿ „Ÿ

„Ÿ „Ÿ „Ÿ On „Ÿ „Ÿ

1 second

Blinks „Ÿ „Ÿ „Ÿ „Ÿ „Ÿ

„Ÿ „Ÿ „Ÿ „Ÿ „Ÿ 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 /ITIT 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 EEPTOM reset operation. (See Section 1.4.2 “Panel function at power on”) Refer to Chapter 2 or Chapter 3.

Ink out (color)

1 second

Paper Out Pause

1 second

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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.

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EPSON Stylus COLOR 1520

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.

More adjustment ?

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

Figure 0-11. Default Setting Flow Chart

YES

Rev. A

Page 35

1.4.5.2 Setting Menus

The default setting menus are described in the table below.

Table 0-25. 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 /

Fast

Off

/ Off

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

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EPSON Stylus COLOR 1520

Table 0-26. Print Direction Mode Characteristics

Black and White Printing YMCK Printing (color)

Auto y Throughput and quality is better. y Throughput is better.

Bi-D y Throughput is the best.

y Print quality may be down.

Uni-D y Throughput is worse.

y Print quality is the best.

Table 0-27. Printing Direction and ESC U Command

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

y Throughput is the best. y Color quality with special paper is worse.

(Color correction depends on the print direction.)

y Throughput is worse. y 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 0-28. 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

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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 0-12. Printer Adjustment Flow Chart

1.4.6.2 Adjustment patterns

Table 0-29. 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

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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 Pri nti ng 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 “

ESC r

” is ignored in this mode.

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Page 39

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

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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 0-13. C211 MAIN Board Component Layout

Printhead Common Drive Circuit

CR Motor Drive IC

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Page 41

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 0-14. C211 PSB/PSE Board Component Layout

Switching FET

Rev. A

Page 42

Chapter 2

Operating Principles

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

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

2.2.1.1. M-4I60 Printer Mechanism .......................................................................................2-1

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

2.2.2.1. Printhead Structure .................................................................................................. 2-2

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

2.2.2.3. Printing Methods.......................................................................................................2-3

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

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

2.2.4.1. ASF (Auto Sheet Feeder) Mechanism ..................................................................... 2-7

2.2.4.2. Tractor Mechanism................................................................................................... 2-8

2.2.4.3. Manual Feed Mechanism......................................................................................... 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 Mechanism..................................................................................2-15

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

2.3.1. C172 PSB/PSE Electrical 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. Printhead 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

Page 43

Operating Principles

2.1 Overview

This chapter describes the operating principle of the printer mechanism and electrical circuit.

2.2 Printer Mechanism Operating Principle

2.2.1.1 M-4I60 Printer Mechanism

This printer is composed of the printhead unit, paper feeding m echanism, CR m echanism and the pump mechanism. T he block chart for the printer mechanism is shown in Figure 2-1. T he printer mec hanism of this printer has 2 motors: CR m otor and PF motor. The torque from the CR motor m oves the CR in the column direction. The torque from the PF motor is transm itted to 2 ways: to the paper feeding m echanism and to the pump mechanism . T he direction is determ ined by the CR position. T he release lever trans mits the torque from the PF motor to the tractor side to feed continuous 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

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2.2.2 Printing Mechanism

The printing method used for this printer is On-dem and ink jet, sam e as for other EPSON ink jet printer s. The new method used for the printhead enables the printer to produce output in high quality at a higher speed. The printing mechanism has 2 parts: ink cartridge and printhead. The ink cartridge is filled with ink.

2.2.2.1 Printhead Structure

The printhead for this printer has the black head and color head. The structures of the printheads are basically the same except for the nozzle configuration. The black head, used for the black ink only, is composed of 128 nozzles (32 nozzles for 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 each color.

Printhead Driver Circuit Board

Nozzle Plate

To the ink cartridge.

Piezo

Cavity

Nozzle

Figure 2-2. Printhead Structure

Rev. A

Page 45

Operating Principles

2.2.2.2 Printing Process

Steps bellow describe how the ink is ejected from each nozzle with the on-demand ink jet system.

Step 1>Normal state

No print signal is applied to the PZT. In this state, the PZT does not displace and no pressure is added inside the cavity. Therefore the pressure in the cavity is kept at a constant level.

Step 2>Ejecting state

Print signal is applied to a specific nozzle by the head driver circuit to drive the PZT of the nozzle. The voltage which drives the PZT is produced in the common driver circuit board on the control board. W hen the voltage is applied to the PZT, the PZT displaces and the press ure in the cavity changes. T hen the ink is ejected as a result.

Normal State

Cavity

Nozzle

Figure 2-3. Printing Operation States

When no print s ignal is applied to the PZT, the PZT recovers f rom the displaced s tatus . With this proc es s, the cavity also returns to its normal size, which brings the pressure negative. T he negative press ure in the cavity then absorbs the ink from the cartridge to fill the cavity with the ink again for the next printing motion. The ink which was not us ed for printing adheres on the nozzle surface and increases viscosity in the nozzles, and it causes printing malfunction. T herefor e the ink is per iodically absorbed and wasted into the waste ink drain pads by the pump mechanism . Ink viscosity varies depending on the temperatures around the head. Since the change in the ink viscosity causes decreas in the print quality, the thermistor is attached to the black head driver circ uit board to control the drive voltage at the proper level ref erring to the detected head temperature.

Piezo

Ejected Ink

Ejecting State

2.2.2.3 Printing Methods

This printer has following special printing modes to print various types if graphic image.

Double Firing Normal dot / One dot printing mode

This printer forms 1 dot with double ink ejections in the ANK or bitmap image mode. In the raster graphics mode which requires a high-resolution-printing, however, forms 1 dot with a single ink ejection.

EPSON Micro dot printing

Both black and color printings can be performed in the normal dot printing mode and EPSON micro dot printing mode. In the normal dot printing mode, the printer uses less ink to create sharper dots. Therefore the gradation range is expanded with more delicate tone. This mode is available when the 1440X720-dpi-paper or glossy film is selected.

Micro Weave Printing

In this mode, nozzles to be activated are divided and only specific nozzles are used for each pass. The paper is also fed in a smaller increment for this operation. This mode eliminates white banding that occurs between lines to improve graphic images. Decrease in paper feed speed is, however, inevitable. The Micro Weave printing can be selected through the printer driver.

Rev. A

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

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Table 2-1. Special Printing Availability

Black printing for the raster data

360 dpi exclusive paper

720 dpi exclusive paper

OHP sheet

Glossy film Glossy paper

Normal paepr 2 dot printing







Normal dot

Micro Weave

2 dot printing

Normal dot

Micro Weave

2 dot printing

Normal dot

Micro Weave

1 dot printing

Normal dot

Micro Weave



1 dot printing

Normal dot

Micro Weave



1 dot printing

Normal dot

Micro Weave

1 dot printing

Normal dot

Micro Weave



1 dot printing

Normal dot

Micro Weave

1 dot printing

Normal dot

Micro Weave

Color printing for the raster data

360 dpi exclusive

720 dpi exclusive

OHP sheet

Glossy film Glossy paper

Normal paepr 2 dot printing







Normal dot

2 dot printing

Normal dot

Micro Weave

2 dot printing

Normal dot

1 dot printing

Normal dot

Micro Weave



1 dot printing

Normal dot

Micro Weave



1 dot printing

Normal dot

Micro Weave

1 dot printing

Normal dot

Micro Weave



1 dot printing

Normal dot

Micro Weave

1 dot printing

Normal dot

Micro Weave

For ANK, Bitmap image data

360 dpi exclusive

2 dot printing

Normal dot

2 dot printing

Normal dot



Rev. A

Page 47

Operating Principles

2.2.3 Carriage (CR) Mechanism

The CR mechanism is composed of the CR unit, timing belt, CR guide shaft, paper eject frame, HP sensor (Home Position s ensor) and CR m otor. The CR motor sends torque to the timing belt to m ove the CR unit in the both right and left directions along the paper eject fr ame and CR guide shaft. A stepping motor used for the CR m otor enables the CR unit to move and stop at any position. The CR is primarily detected at the home position by HP sensor when the printer is turned on and its position is then controlled by the open loop. Table 2-2 and Table 2-3 show the specification for the CR motor and the CR motor drive terms, respectively.

Table 2-2 CR Motor Specification

Item Description

Motor type 4-phases / 200-pole / HB type stepping motor Drive voltage Coil resistance Excitation mode Unipolar drive

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

42 VDC ± 5% (The voltage applied to the driver) 5 Ω ± 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 Drive Terms

mode

Print speed Acceleration1Acceleration

Constant 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

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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) motor, front/rear PE (Paper End) sensors, PF roller, paper guide mechanism, paper eject unit, and PF motor drive disengage m echanism. The torque fr om the PF motor drives the paper load mechanism, paper f eed mechanism and paper ej ect mechanism . While the pr inter is not printing, the PF motor drive disengage m echanism switches the torque from the PF motor to the pump mechanism, which depends on the CR position. While the paper f eed mechanism is driven, the torque from the PF motor is transmitted via PF motor pinion gear and disengage gear to the PF roller., where the torque is then divided into 2 directions. One is transmitted to the paper eject mec hanis m via the gear train in the paper guide assembly. The other is transmitted to the ASF mechanism via the transmission gear. The tractor drive gear train is set at the left end of the PF roller. Table 2-4 and Table 2-5 shows the specification for the PF motor and PF motor drive terms, respectively. Figure 2-5 illustrates the paper f eed mechanism .

Table 2-4 PF Motor Specification

Item Description

Motor type 4-phases / 96-pole / HB type stepping motor Drive voltage Coil resistance Connection Bipolar Excitation 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 applied to the driver) 10 Ω ± 10% (at 25° C per 1 phase)

Table 2-5 PF Motor Drive Terms

Operation

Acceleration Constant Deceleration Stand-by

mode

Paper feed

0.9/0.9 0.9 0.75/0.75 0.6

/LQHIHHGLQFK

ASF Feed 0.9/0.9 0.9 0.75/0.75 0.6 Pump driven Pump driven

 /0.9

 / 

0.9 0.9 0.6

0.9

 / 

(slow)

Note) Double 1-2 phase drive / 2-2 phase drive

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

Page 49

Operating Principles

2.2.4.1 ASF (Auto Sheet Feeder) Mechanism

Tor que from the PF roller is tr ansm itted to the pick up roller in the ASF mec hanism via the planetary gear by the PF motor drive disengage mechanism which switches the torque based on the detec ted pos ition of the CR unit. The pick up roller shaft has 2 arms on the right and left ends . The arms pus h down the paper support to make the paper surf ace contact with the pick up roller. The one way clutch rotates the puck up roller in the specified direction to load paper. The paper loaded is then fed by the paper feed mechanism and the gear transmission from the planetary gear is disengaged.

ASF Mechanism

Pickup Rollers

Arm

Front PE Sensor

One Way Clutch

Paper

PF Roller

Figure 2-6. ASF Mechanism

Disengage Gear

Pinion Gear

ASF transmission Gear

Paper Support

PF Motor

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2.2.4.2 Tractor Mechanism

Tor que sent from the PF motor to the gears at the left end of the PF roller is trans mitted to the tractor gears via disengage mechanism by the release lever operation. When the release lever 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 roll paper at the rear paper slot. While paper is detec ted by the rear PE sensor, the CR unit is off the ASF paper feed position. Therefore paper is m anually loaded even if there is paper in ASF. This mode allows the use of paper which is not set in ASF.

Rev. A

Page 51

Operating Principles

2.2.5 Platen Gap (PG) Adjust Mechanism

The PG adjust mec hanism, located at the top right of the printer m echanism, allows the user to set the proper platen gap (distance between paper and nozzle surface) for the paper thickness to prevent ink smudging. The PF Adjustment mechanism consists of the PG adjust lever, CR guide shaft, and parallelism adjust bushings . Shifting the lever from “0” to “1” turns the CR guide shaft that joins to the lever. The joint for the parallelism adjust bushing and CR guide shaft has an eccentricity toward the guide shaft, which moves the guide shaft from or toward the platen. With this movement, the platen 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, OHP Sheet,

Label, Continuous paper

Envelope ,Card, Index card Front + 0.7 mm

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

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2.2.6 Ink System

The ink system for this printer is composed of the following mechanisms.

Ink cartridge Pump mechanism Capping mechanism Waste ink drain pads Wiping mechanism

Figure 2-9 shows the block chart 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

Page 53

Operating Principles

2.2.6.1 Pump Mechanism

1. Switching operation from the paper feed mechanism to the pump mechanism

The PF motor also functions as the pump motor by the switching operation of the PF motor drive disengage mechanism. When the CR unit returns to the home position, the switch lever in the CR unit pushes the cam lever. Then the disengage gear switches the torque from the ASF to the pump mechanism via the gear train. Figure 2-11 illustrates how the torque is transmitted f rom the paper feed mechanism 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 2-1 1. Paper Feed Mechanism Function

2-1 1

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2. Switching operation from the pump mechanism to the paper feeding mechanism When the CR unit shif ts from the right end to the left end, the switch lever in the CR unit pushes the cam release. Then the disengage gear s witches the torque from the pump m echanism to the 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

Page 55

Operating Principles

3. Pump Mechanism Operation The pump mechanism absorbs ink inside the printhead and drains the ink to the waste ink drain pads via the cap. Since this printer has black and color heads, the pump m echanism f unctions for the both heads by alternating rotational directions of the PF motor. When the PF m otor rotates forward (the direction for feeding paper), the pump is used for the black head. T he PF motor rotates backward (the direction for feeding back paper) to use the pump for the color head. The pump mechanism is composed of the 2 rollers : tube, and pulley. To draw the ink, the pulley rotates the rollers squeezing the tube to produce the negative pressure, which absorbs the ink and drains 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

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2.2.7 Capping Mechanism

The capping mechanism caps the printheads with the cap holders to prevent the ink around the nozzles from increasing viscosity while the printer is in the stand-by status or the printer power is off. The cap is individually equipped for the black and color head. W hen the CR m oves right f rom the hom e position, the cap holder also shifts right and s tr ik es the r ight f rame. This motion opens the air valve to releas e the air in the cap. To start pr inting operation, the CR moves right from the hom e position to strike the right fram e with the cap holder so that the air valve opens. This operation brings the negative pressure in the cap back to normal and the CR goes back the home position. The power switch of this printer uses the secondary circuit that keeps the printer power on until the capping operation c ompletes even if the printer is turned off during the operation.

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

Page 57

Operating Principles

2.2.7.1 Wiping/CR Lock Mechanism

The wiping mechanism removes the ink and dust adhered around the nozzles. This is operated during a cleaning sequence. W hen the PF motor rotates backward, the torque sent via the head c leaner (wiper) drive gear and the clutch moves the head cleaner to the path of the printhead. Then the CR unit moves right and left to wipe the nozzle surface against the head cleaner. The head cleaner leaves the path with the forward rotation of the PF motor. Only one cleaner head is used for both black and color heads. T he head cleaner is substituted for the CR lock m ec hanism . When the printer power is off, it loc k s the CR unit off the printing side. The right fram e also locks the CR at the right end. W ith this mechanism , the CR remains in the capping position while transported.

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

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2.3 Electrical Circuit Operation Principles

This printer consists of the following circuit board:

C211 MAIN board C178 PSB/PSE board C211 Panel board

Head driver circuits (nozzle selection circuit) are directly attached to the black and color heads . Figure 217 shows the block diagram of the electrical circuit.

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 voltages for the PSB/PSE board are as shown in Table 2-7. Since the electrical circuit of this printer is in a secondary circuit, it accom modates the delay timer to mak e the printer ex ecute the capping operation even though the printer is turned off during the operation. With this function, the printer can prevent the ink clogging or smudging caused by the exposed printhead.

Table 2-7. DC Voltage Distribution

VDC Application

+42 V  CR motor/PF motorMotors

 Printhead common voltage

+5 V  C211 MAIN control board (logic)

 Sensors (HP sensor, PE sensor, ink cartridge

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 c ircuit f or higher har m onics absor ption and is then input to the rec tific ation and smoothing circuit, converting into DC voltage. T his DC voltage is then input to the switching circuit. Along with this switching operation by FET on the primary side, +42 voltage is gener ated and s tabilized on the secondary side. The produced +42 voltage is then converted into the stable +5 VDC by the regulator IC. The CPU on the C211 MAIN board monitors the on/off signal of the power switch on the control panel. When the power goes off, the CPU sends the Power Off signal (PSC) to the electrical circuit. The electrical board has a delay circuit (ZD86, C82 and Q84) to delay the power off. The electr olytic capacitor, which control the delay period, continues to output +5 V and +42 V by keeping the m ain c ircuit switch on the primary side active until all electric char ge is discharged. (The delay period is normally minim um 20 seconds, which depends on the capacitor size.)

2-1

Rev. A

Page 59

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

Circuit

+42 V

Protection Circuit

(Q81, Q82)

+42 V

Protection Circuit

(ZD52, ZD53, ZD87, Q82, Q83)

+5 V

Protection Circuit

(ZD53, Q82)

Secondary Circuit

Chopping Regulator

(IC51)

Line Detector

(ZD51, 81 to 86)

Line Over Current

Line Over Voltage

Over Voltage

+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 voltage protection circuit

The output voltage level of the 5 V line is monitored by a Zener diode (ZD53). If the voltage level exceeds 9 V, the status is fed back to the primary switching circuit through the transistor (Q82) and photocoupler (PC1) to cut the +42 V line to the regulator (OC51).

+5 VDC line constant voltage control circuit

Voltage at +5 VDC line is controlled by the regulator IC (IC51). When the abnormal voltage at +5 VDC line is detected, the status is input to the internal comparator of the regulator to control the voltage.

+42 VDC line over voltage protection circuit

The output level of the +42 VDC line is monitored by the 2 Zener diodes ZD52 and ZD87. When the output level of the +42 VDC line exceeds +48 V, the switching FET operation on the primary side is stopped via the thyristor (CY52), transistor (Q81) and photocoupler (PC21).

+42 VDC line constant voltage control circuit

Voltage at the +42 VDC line is monitored by the Zener diodes (ZD51, ZD81−ZD86). This circuit feeds back the output voltage level status through photocoupler (PC1) to the primary switching circuit to control the on/off time of the switching FET for constant output voltage.

+42 VDC line overcurrent protection circuit

The output current is monitored by the transistors Q81 and Q82. When the output current is abnormally low , the status is assumed to be a short circuit and the information is fed back to the primary circuit to stop the switching FET operation

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2.3.2 C211 MAIN Control Board

This printer uses C211 MAIN for the main control circuit board. It 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 MROM Drivers :Produces common voltage for the motors and printheads.

Table 2- 8 and Figure 2-19 s how the allocated func tions f or m ajor components and the m ain control circ uit block diagram, 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 Controls the parallel I/F.

DRAM IC9 Manages buffers, work area in the CPU, and DRAM IC10 For image buffer. Expansion

MROM IC13 24 Mbit

P-ROM IC11 Equipped only for the European version. P-ROM IC14 8Mbit

EEPROM IC2 Stores values for the default settings and other

Timer counter IC IC3 Manages timers for the ink system. Common driver IC IC18 Produces common voltage for the black head. Common driver IC IC19 Produces common voltage f or the color head.

Driver IC16 Drives the PF motor. Driver IC17 Drives the CR motor.

Controls the printer at the gate arrays IC5 and IC6

according to the program in P-ROM.

Controls the I/F for the control panel. Controls the CR motor. Detects the signals from the PE sensor, cover

open sensor and REL (Release) sensor.

Controls the serial I/F. Controls Type-B I/F. Controls the PF motor. Controls black and color heads. Controls the HP sensor and DE sensor.

stuck area.

Manages C.G. (Character Generator).

Printer control program Manages C.G. (Character Generator).

values.

2-1

Rev. A

Page 61

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

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2.3.2.1 Reset Circuits

The C211 MAIN board contains two reset circuits: logic line (+5 9) and power (+42 9) line. Reset IC M51955BFP (IC4) monitors the +42 9 line. It outputs /NMI s ignal to the CPU and the gate array to cut off the power line for the motors when the voltage level drops below 33.2 V. Reset IC RST592D (IC1) monitors the +5 V line and sends low pulse when the voltage level drops below 42 V. During the printer 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

(IC1)

RES

XRESET

VOUT

RESET

E05B34

(IC5)

E05B33

(IC6)

Figure 2-20. Reset Circuit Block Diagram

2.3.2.2 Sensor Circuits

This printer has 9 sensors to monitor the printer condition. HP Sensor (Home position 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 indicates that the CR unit is off the home position. The photo interrupted system is highly reliable because it has no contact with any mechanism.

PE_R sensor (Rear Paper End sensor)

The PE_R sensor, attached to the rear side of the paper path, detects the paper presence condition for continuous 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 End sensor)

This PE_F sensor, located in the paper guide unit, detects cut sheet presence 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 frame in the printer mechanism. It determines whether the release lever is set to the cut sheet side (friction mode) or continuous paper side (tractor mode). A mechanical switch used for this sensor opens and closes when the lever is set for the friction mode and for the tractor mode, respectively.

DE sensor (Disengage sensor)

DE sensor built into the middle frame detects the CR position. A mechanical switch used for this sensor opens when the CR is at the pump side and it closes when the CR is at the paper feeding side.

BCO sensor (Black ink cartridge sensor)

BCO sensor, attached to the black ink cartridge holder in the CR unit, detects the black ink cartridge installation condition. A mechanical switch used for this sensor indicates Low when the cartridge is installed and goes High when the cartridge is not installed. When the sensor detects no cartridge condition, it resets the ink consumption counter.

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Operating Principles

CCO sensor (Color ink cartridge sensor)

CCO sensor, attached to the color ink cartridge holder in the CR unit, detects if the color ink cartridge is installed. A mechanical switch used for this sensor indicates Low with a cartridge installed and goes High without it. When the sensor detects no cartridge condition, it resets the ink consumption counter.

Cover open sensor

Cover open sensor, located at the right end of the printer mechanism unit, monitors the open/close status for the printer cover. A mechanical switch for this sensor opens when the cover is closed and closes when the cover is opened. When a cover open condition is detected, the printer sopts printing at the end of the line and returns the CR slowly to the CR lock position. When printing is commanded, the CR is left unlocked.

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 transmitted to the analog port of the CPU.

Figure 2-21 shows sensor circuit block diagram.

SWA3

Thermistor

THS

CPU C90A02CB (IC7)

Data Bus

GA E05B34 (IC5)

SWA2

SWA1

SWA0

PE_R Sensor

PE_F Sensor

REL Sensor

Cover Open Sensor

SWA0

GA E05B33 (IC6)

Address Bus

SWA1

SWC0

SWC1

Figure 2-21. Sensor Circuit Block Diagram

HP Sensor

DE Sensor

BCO Sensor

CCO Sensor

Rev. A

2-21

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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 voltage reference 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 transferred synchronizing with the clock signal (XCRCLK). Then the data is read at the driver IC by the strobe signal (XCRSTB). This sequence enables the micro step with a minimum of 0.026 mm pulse driven at 2W1-2 phas e excitation. The hold signal (CRHLD) also drives 2 phases to place the CR to the home position and to the cartridge change position. The Figure 2-22 s hows the CR motor driver circuit block diagram.

GA E05B34 (IC5)

XCRCLK

XCRSTB

CRASERI

CRBSERI

From CRV0 to CRV6

PF Motor Drive IC SLA7043M (IC17)

101 102

+5V

CRV

CLKA

CLKB STBA

STBB

DATAA DATAB

REFA

REFB

Figure 2-22. CR Motor Block Diagram

PF Motor

+42V

CR A

CR_A

CR B

CR_B

CRCOM

2-2

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Page 65

Operating Principles

2.3.2.4 PF Motor Driver Circuit

The PF motor for this printer operates the following:

Paper loading Paper feeding Pumping

The gate array E05B33 (IC6) outputs the phase drive control signals (PFAPH and PFBPH), phase data (PFA0/1 and PPFB1/0) and voltage reference data (PFV) to the driver IC UDN2917EB (IC16). The driver IC then controls the phase current based on the voltage ref erenc e data. This sequence enables the m icro step with a minimum 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 Block Diagram

PF Motor

PF A

PF_A

PF B

PF_B

Rev. A

2-2

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2.3.2.5 Printhead Driver Circuit

This printer has 2 separate printhead dr iver circ uits:f or the black head and f or the color head. Each circuit has the common voltage driver circuit attached to the MAIN board and the nozzle selection circuit attached to the head driver circuit board. The com mon driver circuits for the both black 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 selection circuit and 128- bit transfer gate array IC IR2C72C (for cyan and yellow) and 64-bit transfer gate array IC IR2C73C (for magenta) are used f or the color head nozzle selection circuit. Printing data is separated into the common voltage signal and the nozzle selection signal at the gate array E05B33 (IC6) and is then transferred to the corresponding circuit. Figure 2-24 shows the printhead driver circuit 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

Page 67

Operating Principles

Common driver circuit for the black head

Gate array E05B33 (IC6) sends serial data to the head nozzle selection circuit on the head to select nozzles to activate. Then the data is transferred to the common driver on the control board to drive all piezos that are corresponding to each nozzle. The operating principles for the black head is 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 selection signal (BAHDATA and BBHDATA) are sent in serial data to the corresponding row. Clock signal (BHCLK) is composed of the pulses from #1 to #64. The nozzles to be activated is determined by the nozzle selection signal synchronized with the clock signal by the latch signal (BHLAT). However, the numbers used for the pulses and corresponding nozzles are not the same.

Common driver circuit

The common voltage (VH) is established to correspond to each of the black printhead characteristics. This value is stored in advance in the EEPROM when the printer power is off. At power on, the value is stored in the RAM. The gate array E05B33 (IC6) refers to the value for the common voltage when outputting the serial data SBDATA as the voltage control signals to the common driver circuit. The serial data transmission control signals (SCLK, SSTB and SCLR) are used for this operation. The thermistor controls the common voltage by outputting the signals to compensate for changes in ink viscosity.

BA/BHDATA

#64

BHCLK

BHLAT

BHNCHG

COM

BKC,BCHG

BND0/1,BMD0/1

Figure 2-25. Black Data Transmission Timing

Head Drive Voltage (VH)

Rev. A

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Color head nozzle selector circuit

The operating principle for the color head is the same as for the black head except that color print is performed with data for 3 different colors: yellow, cyan, and magenta. The operating principle for the color head is as described below: Nozzle selection circuit

The nozzles for the color head are divided into 3: for yellow, cyan, and magenta with 64 nozzles for each of them. The nozzle selection signals for each color (YHDATA for yellow, MHDATA for magenta and CHDATA for magenta) are sent simultaneously in serial data. The clock signal (CHCLK) is composed of the pulses from #1 to #64. The nozzle selection signal and the corresponding clock signal are synchronized by the latch signal (CHLAT) to determine the nozzle to use. However, the numbers used for the pulses and corresponding nozzles are not the same.

Common driver circuit

The common voltage (VH) is established to correspond to each of the black printhead characteristics. This value is stored in advance in the EEPROM when the printer power is off. At power on, the value is stored in the RAM. The gate array E05B33 (IC6) outputs the serial data SCDATA of the voltage control signals to the common driver circuit referring to this value. The control signals for the serial transmission SCLK, SSTB and SCLR are used for this operation. The thermistor controls the common voltage by outputting 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

Page 69

Operating Principles

2.4 Ink System Management

This section explains how the ink system is controlled to protect the printheads and to ensure the output in high quality. The ink system consists of following operations:

Power On Initialization Ink Cartridge Replacement Cleaning Print Start Flushing Waiting False Absorbing Wiping Rubbing Micro Absorbing Carriage Lock

The printer also selects an ink sequence based on the printer condition by referring to the value f or the timer counter IC that has a back-up lithium battery and timer counter stored in the EEPRO M. The printer has following counters:

Protect Counter A Protect Counter C Ink Consumption Counter One-time Flag

2.4.1 Ink System Operations

The ink system operations are as described below.

Power on



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

Initialization



Performed when the printer receives the initialization command. The CR returns to the home position during this operation.

Ink Cartridge Replacement



Performed through the control panel operation when the ink cartridge needs replacing. It determines whether the ink cartridge is installed and performs cleaning sequence if necessary.

Cleaning



Performed to solve decline in print quality caused by the abnormal nozzle status such as nozzle clogging and inaccurate ink ejection.

Print Start



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

Flushing



Performed to eject few ink dots during printing to prevent ink from increasing viscosity.

Waiting



Performs the flushing operation after the printing operation to avoid nozzle clogging caused by the 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 eliminate the ink and dust that adheres on the nozzle surface. Few dots of ink is absorbed to moisten the nozzle surface prior to this operation.

Micro Absorbing



Performed to eject bubbles formed inside the cavity.

Carriage Lock



Locks the carriage when turning off the printer or no printing is performed for 5 minutes with the printer power on.

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2.4.2 Counters

This printer is equipped with following counters. The values for the counters are stored in the EEPROM on the MAIN control board.

Protect Counter A



This counter is used to manage the total amount of drained ink. If the counter value exceeds 65,000, the maintenance error occurs and the current printing job stops consequently. (Refer to Section

1.4.11.) This error requires EEPROM clear and waste ink drain pad replacement. (Refer to Section

1.4.3 and Section 3.2.9.) The current value for this counter can be found in the default setting mode. (Refer to Section 1.4.5.) To reset the counter, perform EEPROM clear through the control panel operation or by running the adjusting program.

Protect Counter C



This counter is used to manage the amount of ink flushed at the left waste ink drain pad located at left end of the paper eject drive unit. The counter value corresponds to the ink amount accumulated in the pad. If the counter value exceeds the specified value, the maintenance error is indicated and the current printing job stops consequently. (Refer to Section 1.4.11.) With an occurrence of this error, the waste ink drain pads must be replaced. (Refer to Section 1.4.3 and Section 3.2.9.) the current value for this counter can be found in the default setting mode. (Refer to Section 1.4.5.)

Black/Color One-time Flag



This flag set in the EEPROM sets a limit to prevent user from performing frequent initial ink charge operation. Normally the initial ink charging is performed when the user starts using a new printer only. The flag 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 after a new cartridge is installed. The value is referred to determine the amount of ink remaining in the cartridge. This counter is reset when the cartridge is removed.

CAUTION

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

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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 Replacement.................................................................................................................. 3-6

3.2.3 Print Head Removal................................................................................................................ 3-7

3.2.3.1 Black 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 Printer Mechanism Unit 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 Printer Mechanism Unit Disassembly .............................................................................. 3-16

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

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

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

3.2.10.4 Front/Rear PE (Paper End) Sensor Removal ....................................................... 3-20

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

3.2.10.6 Edge Guide Unit Removal..................................................................................... 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 Feed (PF) Roller Removal........................................................................ 3-31

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

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

Page 72

Disassembly and Assembly

3.1 Overview

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

1520. Unless otherwise specified, disass em bly units or com ponents can be reass em bled by reversing the disassembling procedur e. T her ef ore, no as s embly procedures are included in this section. Precautions f or 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 disassembling and assembling EPSON Stylus COLOR 1520.

WARNING

;

Disconnect the power cable before disassembling and assembling the printer.

;

Wear protective goggles to protect y our eyes from ink. If ink gets in y our eyes, flush the eye with fresh water and see a doctor 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 c ase ink gets in your eyes, flus h it with fresh water and see a doctor immediately.

;

A lithium battery is installed on the main board of this printer. Be sure to observe the following instructions when servicing the battery:



Keep the battery away from any metal or other batteries so that electrodes of the opposite

polarity do not come in contact with each other.



Do not heat the battery or put it neat fire.



Do not solder on any part of the battery. (Doing so may result in leakage of electrolyte from the battery , burning or explosion. the leakage may affect other device close 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 your throat. Leakage , burning or explosion may also be resulted.)



Do not install the battery in the wrong direction. (This may cause burning or explosion.)

CAUTION

Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacture. Dispose the used battery according to gover nment’s law and regulations.

ATTENTION

Risqué d’explosion si la pile est remplacèe incorrectment. Ne remplacer pue par une pile du même type ou d’un type équivalent recommandé par le fabricant. Elimenir les piles déchargées s elon les lois et les règles de sécurité en vigueur.

Rev. A

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CAUTION

;

Never remove the ink cartridge from the carriage unless manual specifies to do so.

;

When transporting the printer after installing the ink cartridge, be sure to pack the printer for

transportation without removing the ink cartridge.

;

Use only recommended tools for disassembling, assembling or adjusting the printer.

;

Apply lubricants and adhesives as specified. (See Chapter 6 for details.)

;

Make the specified adjustments when you disassemble the printer. (See Chapter 4 for details.)

3.1.2 Tools

Make sure you use the tools listed in the following 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

Page 74

Disassembly and Assembly

3.2 Disassembly and Assembly

This section desc ribes disassembly and assembly procedures f or the printer assemblies and par ts. See the precautions in Section 3.1.1 when disassembling and assembling.

CAUTION

See the precautions in Section 3.1.1 prior to disassembly and assembly.

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

Page 75

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3.2.1 Upper Housing Removal

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

2. Remove the tractor unit by releasing the hook using the tweezers, then remove it from the printer mechanism unit by lifting up the rear edge of the tractor unit.

Hook in the Tractor Unit

Tweezers

Tractor Unit

Figure 3-2. Tractor Unit Removal

3. Open the printer cover, and insert the tweezers into the cutouts at the back of the Panel Unit to release the hooks securing the panel unit to the upper housing. Then disconnect the connector cable for the Panel 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

Page 76

Disassembly and Assembly

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

5. Insert the tweezers into the cutouts at the bottom of the upper housing to release the hooks fixing 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 specified 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

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3.2.2 ROM Replacement

1. Remove 1 screw (CBP, 3X8) securing 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 cable.

;

Rev. A

Page 78

Disassembly and Assembly

3.2.3 Print Head Removal

3.2.3.1 Black Head Removal

1. Remove the upper housing. (Refer to Section 3.2.1.)

2. Remove the ink cartridge if it is installed.

3. Remove the FFC holders from the front left corner of the CR unit. Then release the FFCs by pulling them toward the printhead side.

4. Disconnect the black head FFC from the black head connector.

5. Remove the cartridge lever.

6. Remove the compression spring fixing the black head to the CR unit.

7. Remove the head fixing screw securing the black head to the CR unit.

8. Shift the black head forward then remove the black head by lifting 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

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3.2.3.2 Color Head Removal

1. Remove the upper housing. (Refer to Section 3.2.1.)

2. Remove the ink cartridge if it is installed.

3. Remove the FFC holders from the front left corner of the CR unit. Then release the FFCs by pulling them toward the printhead side.

4. Disconnect the color FFC from the color head connector.

5. Remove the Cartridge Lever.

6. Remove the compression spring fixing the black head to the CR unit.

7. Remove the screw securing the color head to the CR unit.

8. Shift the color head forward then remove it by lifting upward.

WORK POINT

When removing the black head, be careful not to catch the color head FFC.

;

Be careful not to damage 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 adjustment



Head gap adjustment

Rev. A

Page 80

Disassembly and Assembly

3.2.4 Home Position (HP) Sensor Removal

1. Remove the upper housing. (Refer to Section 3.2.1.)

2. Disconnect the connector cable from the HP sensor connector.

3. Release the hooks fixing the HP sensor to the paper eject frame using the tweezers, then remove the HP sensor.

WORK POINT

After reassembling the HP sensor to the paper eject frame, be s ure to fix the hooks to the frame

;

using the specified adhesive. (Refer to Chapter 6.)

HP Sensor

Paper Eject Frame

Rev. A

Tweezers

Figure 3-6. HP Sensor Removal

Connector Cable for the HP Sensor

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3.2.5 Cover Open Sensor Removal

1. Remove the upper housing. (Refer to Section 3.2.1.)

2. Disconnect the cover open sensor connector cable from the cover open sensor connector.

3. Release the hooks fixing the Cover Open Sensor to the paper eject frame using the tweezers then remove the Cover Open Sensor.

Cover Open Sensor

Figure 3-7. Cover Open Sensor Removal

Hook

3-1

Rev. A

Page 82

Disassembly and Assembly

3.2.6 Printer Mechanism Unit Removal

1. Remove the upper housing. (Refer to Section 3.2.1.)

2. Disconnect the connector cables from the connectors 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 mechanism unit to the lower housing.

4. Lift up the printer mechanism unit and remove it.

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 lubricated.

REQUIRED ADJUSTMENT

;

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



Input the head data which is marked on the package.



Bi-directional adjustment.

Screws (CB 4X14)

Printer Mechanism Unit

Screws (CB 4X14)

Rev. A

Lower Housing

Figure 3-8. Printer Mechanism Removal

3-11

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3.2.7 PSB/PSE Board Assembly Removal

1. Remove the upper housing. (Refer to Section 3.2.1.)

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

3. Disconnect the power cable connector from CN1, and the C211 MAIN board connector cable from the CN2.

4. Remove 4 screws (CBP, 3X12) securing the PSB/PSE Board to the lower housing, and remove the PSB/PSE Board.

WARNING

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

;

Screws (CBP 3X12)

PSB/PSE Board

CN2

Lower Housing

CN1

Figure 3-9. PSB/PSE Board Removal

3-1

Rev. A

Page 84

Disassembly and Assembly

3.2.8 C211 MAIN Board Assembly Removal

1. Remove the upper housing. (Refer to Section 3.2.1.)

2. Remove the printer 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 the C211 MAIN board assembly to the lower housing. Then remove the C211 MAIN board assembly, along with the Type-B interface shield cover.

5. Remove 2 screws (CP, M3X6) securing the Type-B interface shield 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 data.

WARNING

;

Be careful when servicing the lithium Battery. (Refer to Section 3.1.1.)

;

Pay attention to the sharp edges of the shield cover.

Rev. A

3-1

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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)

Type-B I/F

Screw (CBP 3X12)

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

Page 86

Disassembly and Assembly

3.2.9 Waste Ink Drain Pad Removal

Waste Ink Drain Pads must be replaced when the printer is under the following conditions:

The value for the protect counter A has reached the specified value (65,000) and the maintenance

request error is indicated.

The indicated value of the Protect counter is more than 52,000. (In this case, be sure to replace

them by agreement with your customer.

The protect counter C has reached the specified value and the maintenance request error for the

left ink pad is indicated.)

(Refer to Section 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 Section 3.2.1.)

3. Remove the printer 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 Section 3.2.1.)

3. Remove the ink pad cover on the left end of the paper eject drive unit.

4. Remove the left ink pad.

WORK POINT

Protect counter value is indicated on the first line of the first page of the default setting sample

;

print, along with the ROM version number.

Ink Pad Cover

Left Ink Pad

Printer Mechanism Unit

Waste Ink Drain Pads

Paper Eject Drive Unit

Figure 3-1 1. Ink Drain Pad Removal

Rev. A

3-1

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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 printer 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 assembly counter clock wise in the order indicated 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 frame.

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 connector cable from the connector on the CR motor assembly.

3-1

Rev. A

Page 88

Disassembly and Assembly

WORK POINT

;

When mounting the CR motor, make sure that the connector cable for the DE (disengage) sensor doesn’t cut in.

;

CR fan motor and the CR motor assembly are 2 different parts. Therefore be sure to attach the CR fan motor when replacing the CR motor assembly. Use the specified adhesive to attach the fan to the motor shaft. (Refer to Chapter 6.) Note the following when attaching the fan:



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



Set the fan with the indented side 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

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3.2.10.2 PF (Paper Feed) Motor Assembly Removal

1. Remove the printer mechanism unit. (Refer to 3.2.6.)

2. Remove the connector cable for the PF motor assembly from the connector 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 motor assembly.

WORK POINT

The pinion gear on the PF Motor Assembly is highly precise and tends to rust eas ily. 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 Assembly Removal

Hexagon Nuts (M3)

3-1

Rev. A

Page 90

Disassembly and Assembly

3.2.10.3 DE (Disengage) Sensor Removal

1. Remove the printer mechanism unit. (Refer to 3.2.6.)

2. Using the tweezers, release the hooks fixing the DE sensor to the cam select assembly, then remove the DE sensor.

3. Remove the connector cable from the connector 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

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3.2.10.4 Front/Rear PE (Paper End) Sensor Removal

1. Remove the printer mechanism unit. (Refer to 3.2.6.)

2. Using the tweezers, release the tubs fixing the Front/Rear PE sensors to the rear paper guide at the bottom of the printer mechanism unit.

3. Disconnect the connector cables for 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

Hooks

Front PE Sensor

Figure 3-16. Front/Rear PE Sensor Removal

3-2

Rev. A

Page 92

Disassembly and Assembly

3.2.10.5 REL (Release) Sensor Removal

1. Remove the printer mechanism unit. (Refer to 3.2.6.()

2. Using the tweezers, release the tabs fxing the REL sensor to the left frame assembly. Then remove 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

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3.2.10.6 Edge Guide Unit Removal

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

2. Release the joints for the edge guide unit and the right and left paper load roller slide covers.

3. Remove 2 flange nuts (M4) securing the edge guide unit to the left and middle frame assemblies. 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 the damper

;

pinion with the rack on the release transmission lever.

;

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

;

Fix the flange nuts with adhesive after fastening them. (Refer to Chapter 6.)

Main Bottom Frame

Figure 3-19.

Engagement of the Edge Guide with the Main Bottom Frame

Edge Guide Unit

3-2

Rev. A

Page 94

Disassembly and Assembly

3.2.10.7 Paper Eject Frame Removal

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

2. Disconnect the connector cables for HP sensor and cover open sensor from the connectors.

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 joints.

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 eject frame, place a c lean piece of paper between the platen s urface in

;

the front paper guide assembly and printheads in the CR unit to protect the printheads.

Rev. A

3-2

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3.2.10.8 Pump Unit Removal

1. Remove the printer 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) securing the pump unit to the printer 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 cleaner onto the pump unit, set the rubber part of the cleaner facing to

;

the pump side.

3-2

Rev. A

Page 96

Disassembly and Assembly

3.2.10.9 Carriage (CR) Unit Removal

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

2. Remove the extension spring to release the timing belt. (Refer to the step 2 in Section 3.2.10.1.)

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

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

5. If the head cleaner 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 the base frame assembly. Then remove the head FFC and FFC holder from the printer mechanism unit.

7. Turn the parallelism adjust bushings joining the CR guide shaft to the right and left frame assemblies until they fit into the cutouts on the frames. Then remove the CR unit along with the CR guide shaft.

8. Remove the CR guide shaft 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

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WORK POINT

;

After removing the CR unit, do not touch and damage the heads. Protect the heads from static electricity, because the head drive circuit is directly attached 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 shaft to the printer mechanism unit, be sure to fit the platen gap adjust lever to the right frame assembly. (Refer to the figure below.)

REQUIRED ADJUSTMENT

;

Perform platen gap adjustment, Bi-directional adjustment, and Uni-directional adjustment after installing the CR unit and parallelism adjust bushings. (Refer to Chapter 4.)

;

If the printheads are replaced along with the CR unit, be sure to write head data to the EEPROM. (Refer to Chapter 4.)

WORK POINT

;

When engaging the timing belt to the CR unit, note 2 parts of the belt: flat part and tooth part. Be sure to position the 2 parts of the timing 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

Page 98

Disassembly and Assembly

3.2.10.10 Base Frame Assembly Removal

1. Remove the printer 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 tractor release cam.

6. Adjusting the sub tractor release cam with the cutout in the left frame assembly, and remove it from the tractor release shaft. (Refer to the figure below.)

7. Remove 5 screws (CBS, 3X6) securing the base frame assembly to the printer mechanism unit, then lift up the base frame 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

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3.2.10.11 Paper Load Roller Unit Removal

1. Remove the printer 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 to Section 3.2.10.10.)

5. Attach the knob to the PF roller shaft, and press the trigger lever down. Then rotate the paper load roller unit by turning the knob clock wise to hold the edge guide unit down.

6. Remove 1 screw (CBP, 3X8) securing the paper eject drive unit to the left frame assembly, and remove the paper eject 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 slide covers and the edge guide.

8. Remove the E-ring located at left end of the paper load roller .

9. Adjust the paper load roller bushing with the cutout on the right frame.

10. Disengage the paper load gear at the right end of the paper load roller unit from the ASF transmission gears in the middle frame. Then remove the paper load roller unit by sliding it toward the left frame assembly.

3-2

Rev. A

Page 100

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 1520 Service manual

PRECAUTIONS

REVISION SHEET

TABLE OF CONTENTS

Product Description

Operating Principles