Manual Técnico y PPL Stylus 1520

8/11/2019 Manual Tcnico y PPL Stylus 1520

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Service Manual


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Service Manual

Revision Date1st Release July 1997


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FCC COMPLIANCE STATEMENTFOR AMERICAN USERS

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 ofthe FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residentialinstallation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used inaccordance with the instructions, may cause harmful interference to radio and television reception. However, there isno guarantee that interference will not occur in a particular installation. If this equipment does cause interference toradio and television reception, which can be determined by turning the equipment off and on, the user is encouraged totry to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

WARNING

The connection of a non-shielded equipment interface cable to this equipment will invalidate the FCC Certification of

this device and may cause interference levels that exceed the limits established by the FCC for this equipment. It is theresponsibility of the user to obtain and use a shielded equipment interface cable with this device. If this equipment hasmore than one interface connector, do not leave cables connected to unused interfaces.

Changes or modifications not expressly approved by the manufacturer could void the user's authority to operate theprinter.

FOR CANADIAN USERS

This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Cet appareil numrique de la classe B respecte toutes les exigences du Rglement sur le materiel brouilleur duCanada.

COPYRIGHT NOTICE

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any

form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the written permission ofEpson America, Inc. No patent liability is assumed with respect to use of the information contained herein. Neither isany liability assumed for damages resulting from the use of the information contained herein. While every precautionhas been taken in the preparation of this book, Epson America, Inc., assumes no responsibility for errors andomissions.

Neither Epson America, Inc., nor its affiliates shall be liable to the purchaser of this product or third parties for


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TRADEMARKS

EPSON and ESC/P are registered trademarks and ESC/P 2 and EPSON Stylus are trademarks of Seiko EpsonCorporation.

General Notice: Other product names used herein are for identification purposes only and may be trademarks of theirrespective companies. EPSON disclaims any and all rights in those marks.

Copyright 1997 Epson America, Inc.20770 Madrona AvenueTorrance, CA 90509-2842


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PRECAUTIONS

Precautionary notations throughout the text are categorized relative to:1. personal injury.2. damage to equipment.

WARNING

Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should

be exercised in performing procedures preceded by a WARNING heading.

CAUTION

Signals a precaution which, if ignored, could result in damage to equipment.

Always observe the precautionary measures itemized below when performing repair/maintenanceprocedures.

WARNING

1. Always disconnect the product from both the power source and host computer before performing anymaintenance or repair procedure.

2. No work should be performed on the unit by persons unfamiliar with basic safety measures dictated forall electronics technicians in their line of work.

3. In performing testing described in this manual, do not connect the unit to a power source until instructedto do so. When the power supply cable must be connected, use extreme caution in working on thepower supply and other electronic components.

CAUTION

1. Repairs on EPSON products should be performed only by an EPSON-certified repair technician.2. Make certain that the source voltage is the same as the rated voltage listed on the serial number/rating

plate. If the EPSON product has a primary AC rating different from the available power source, do notconnect it to the power source.3. Always verify that the EPSON product has been disconnected from the power source before removing

or replacing printed circuit boards and/or individual chips.4. To protect sensitive P chip and circuitry, use static discharge equipment, such as anti-static wrist

straps, when accessing internal components.


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Chapter 1 Product Description

1.1 Feature. ...................................................................................................... 1-1

1.2 Specifications....................................................................................................... 1-4 1.2.1 Printing Specifications..................... ......................... ........................ ......................... .......1-4 1.2.2 Control codes ...................... ......................... ........................ ......................... .................... 1-5 1.2.3 Character tables......................... ........................ ......................... ........................ ............... 1-5

1.2.4 Paper Feeding.......... ........................ ......................... ........................ ................................. 1-7 1.2.5 Paper Specifications......................... ........................ ......................... ........................ ........1-8

1.2.5.1 Cut Sheet.............................................................................................................. 1-8 1.2.5.2 Transparency ........................................................................................................ 1-8 1.2.5.3 Envelope...............................................................................................................1-8 1.2.5.4 Index Card............................................................................................................ 1-9 1.2.5.5 Labels (Cut Sheet) ................................................................................................1-9 1.2.5.6 Continuous Paper .................................................................................................1-9 1.2.5.7 Labels (Continuous) .............................................................................................. 1-9 1.2.5.8 Banner .................................................................................................................. 1-9

1.2.6 Printable Area.................................................................................................. 1-10

1.2.7 Adjustment Lever............................................................................................ 1-13

1.2.8 Ink Specifications............................................................................................ 1-14 1.2.8.1 Black ink cartridge............................................................................................... 1-14 1.2.8.2 Color Ink Cartridge.............................................................................................. 1-14

1.2.9 Input Data Buffer....................................... ......................... ........................ ...................... 1-14 1.2.10 Electric Specifications............ ........................ ......................... ........................ .............. 1-15 1.2.11 Environmental Conditions ...................... ......................... ........................ ..................... 1-15 1.2.12 Reliability ...................... ......................... ........................ ......................... ....................... 1-16 1.2.13 Safety Approvals..................... ........................ ......................... ........................ .............. 1-16 1.2.14 CE Marking............ ......................... ........................ ......................... ............................... 1-16 1.2.15 Acoustic Noise....... ........................ ......................... ......................... .............................. 1-16

1.3 Interfaces..................................................................................................... 1-17 1.3.1 Parallel Interface...... ........................ ......................... ........................ ............................... 1-17

1.3.1.1 Forward Channel Specifications.......................................................................... 1-17 1.3.1.2 Reverse Channel Specifications.......................................................................... 1-19

1.3.2 Mac Serial Interface ...................... ........................ ......................... ........................ .......... 1-20 1.3.2.1 Serial Interface Specifications............................................................................. 1-20


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1.4.4 Cover Open Sensor......................... ........................ ......................... ........................ ....... 1-27 1.4.5 Default Setting....................... ......................... ........................ ......................... ................ 1-27

1.4.5.1 Setting Method ................................................................................................... 1-27 1.4.5.2 Setting Menus..................................................................................................... 1-29

1.4.6 Printer Adjustment Mode ........................ ........................ ......................... ....................... 1-31 1.4.6.1 Adjustment Method............................................................................................. 1-32 1.4.6.2 Adjustment patterns............................................................................................ 1-32

1.4.7 Printer Initialization ....................... ........................ ......................... ........................ ......... 1-33 1.4.8 Self-test Printing Mode ...................... ........................ ......................... ........................ .... 1-33 1.4.9 Hexadecimal Dump Function....................... ........................ ......................... .................. 1-33 1.4.10 Monochrome Printing Mode ..................... ........................ ......................... ................... 1-33

1.5 Physical Specifications..................................................................................... 1-34

1.6 Main Components.............................................................................................. 1-34 1.6.1 C211 MAIN Board................... ......................... ........................ ......................... ................ 1-34 1.6.2 C172 PSB/PSE Board ...................... ......................... ........................ ......................... ...... 1-35


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Product Description

1.1 FeaturesThe EPSON Stylus COLOR 1520 is a fast, high-quality color ink jet printer designed for business users. Themain features of this printer are:

High Speed Printing 400 cps in LQ mode 800 cps in draft mode

High-quality color printing for graphics High Resolution 1440 (horizontal) X 720 (vertical) dpi printing Colors 4-color printing (CMYK) Printing Method Traditional and new Microweave

Smaller dot diameter for improved imagesBuilt-in auto sheet feeder with a wide page capability and high capacity

This printer holds Envelopes up to A2 portrait size100 cut sheets (55 g/u )10 envelopes50 transparency films70 special paper

2 interfaces built-in and 1 optional interface card Mac serial interface (up to approximately 900K bps) Bidirectional parallel interface (IEEE-1284 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 Standard character tables

Italic PC437 PC850PC860 PC861 PC863PC865 BRASCII AbicompRoman 8 ISO Latin 1 PC852PC853 PC855 PC857PC866 PC869 MOZOAWIACode MJK ISO 8559-7 Latin 1TBulgaria PC774 EstoniaISO 8859-2 PC866 LAT Greek


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EPSON Stylus COLOR 1520

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


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Product Description

Part Number DescriptionC823051 Serial interface cardC823071 32 KB serial interface cardC823101 32 KB parallel interface cardC823131 32 KB EEE-488 interface cardC823151 TWAIN interface cardC823141 Coax interface cardC823121 LocalTalk interface cardC823311 Ethernet interface cardC823451 Type-B Bidirectional parallel interface cardC836021 Parallel interface cable (shielded)

from D-SUB 25-pin (computer) to Amphenol 57 (printer)C836031/C836041 Serial interface cable

from D-SUB 25-pin (computer) to D-SUB 25-pin (printer)C836051/C836061 Serial interface cable

from D-SUB 9-pin (computer) to D-SUB 25-pin (printer)C811**1 Banner paper holder and cutting guideS020108 Black ink cartridgeS020089 Color ink cartridgeS041059 / 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)

Table 1-1. Options and Consumables


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1.2 SpecificationsThis section provides detailed information on the EPSON Stylus COLOR 1520.

1.2.1 Printing Specifications

Printing method On demand Ink jetNozzle configuration Monochrome 128 nozzles (32 x 4 staggered)

Color 64 nozzles each (magenta, cyan, yellow)

Printing direction Bi-directional with logic-seekingPrinting speed and Printable columns:

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

Character Pitch Printable Columns LQ Speed Draft Speed

10 cpi (Pica) 136 400 cps 800 cps12 cpi (Elite) 163 480 cps 960 cps15 cpi 204 600 cps 1200 cps17.1 cpi(Pica condensed) 233 684 cps 1378 cps20 cpi(Elite condensed) 272 800 cps 1600 cps

Figure 1-2. Nozzle Configuration

#2 #3#4 #1

#125#126#127#128

32/360 inch

144/360 inch

32/360 inch

#1#2

#63#64

Black Cyan

#1#2

#63#64

Magenta

#1#2

#63#64

Yellow

32/360 inch

144/360 inch

320/360 inch

32/360 inch 32/360 inch

144/360 inch

Paper feed direction


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Typeface Bit map LQ fontEPSON Roman 10 cpi, 12 cpi, 15 cpi, Proportional

EPSON Sans Serif 10 cpi, 12 cpi, 15 cpi, ProportionalEPSON 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


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Product Description

Combinations of Character tables and typefaces (font)

Table 1-14 shows the available combinations of character tables and Typefaces.

Bitmap Fonts Scalable Fonts Scalable Fonts

Character TablesEPSON RomanEPSON Sans SerifEPSON CourierEPSON PrestigeEPSON Script

EPSON RomanEPSON Sans Serif

EPSON Roman TEPSON Sans Serif H

ItalicPC 860 (Portuguese))PC 861 (Icelandic)PC 863 (Canadian-French)PC 865 (Nordic)BRASCIIAbicompRoman 8ISO Latin 1

Supported Supported Supported

Italic tablePC 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 774EstoniaISO 8859-2 (ISO Latin 2)PC 866 LAT

Supported SupportedNot

Supported

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

FF Rear tractorFeed speed 66 ms / line (1 line = 1/6 inch)

Table 1-4. Character Tables and Fonts


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1.2.5 Paper Specifications

1.2.5.1 Cut Sheet

Size Width Length A4 8.3 in (210 mm) 11.7 in (297 mm) Letter 8.5 in (215.9 mm) 11.0 in (279.4 mm) B5 7.2 in (182 mm) 10.1 in (257 mm) Legal 8.5 in (215.4 mm) 14.3 in (355.6 mm) B4 10.1 in (257 mm) 14.0 in (364 mm) A3 11.7 in (297 mm) 16.5 in (420 mm) Ledger 11.0 in (279.4mm) 17.0 in (431.8 mm) A3 wide 13.0 in (329 mm) 19.0 in (483 mm) A2* 1 16.5 in (420 mm) 23.4 in (594 mm) US-C* 1 17.0 in (431.8 mm) 22.0 in (558.8 mm) B5 (ISO) 6.9 in (176 mm) 9.8 in (250 mm) B4 (ISO) 9.8 in (250 mm) 13.9 in (353 mm)

Paper Thickness 0.0025 in (0.065 mm) to (0.004 in 0.11 mm)Paper Weight 17 lb (64 g/ m2) to 24 lb (90 g/ m2) (ASF)

14 lb (52 g/ m2) to 24 lb (90 g/ m2) (Manual insertion)Quality Exclusive paper *2, Bond paper, PPC

* 1A2 portrait and US-C portrait are used by manual insertion only.* 2 Use only the designated side of exclusive paper.

1.2.5.2 Transparency

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

Size Width LengthNo.10 9.5 in (241 mm) 4.1 in (104 mm)DL 8.7 in (220 mm) 4.3 in (110 mm)C5 9.0 in (229 mm) 6.4 in (162 mm)

Table 1-5. Cut Sheet Size

Table 1-6. Transparency Size

Table 1-7. Envelope Size


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Product Description

1.2.5.4 Index Card

Size Width Length

A6 index card 4.1 in ( 105 mm) 5.82 in (148 mm)Card Thickness 0.0091 in (0.23 mm)

1.2.5.5 Labels (Cut Sheet)

Size Width LengthA4 8.3 in (210 mm) 11.7 in (297 mm)

Letter 8.5 in (216 mm) 11.0 in (279 mm)

Paper thickness 0.0079 in (0.2 mm) including base sheetQuality Page printer label

Note) Label must be printed at normal room temperature.

1.2.5.6 Continuous PaperPaper size Paper width 4 in (101.6 mm) to 16 in (406.4 mm)

Folding length 4 in (101.6 mm)

Paper thickness 0.0026 in (0.065 mm) to 0.0043 in (0.11 mm)Paper Weight 14 lb (52 g/ m2) to 22 lb (82 g/ m2)

1.2.5.7 Labels (Continuous)Paper size

Base sheet Paper width 4 in (101.6 mm) to 16 in (406.4 mm)Folding length 4 in (101.6 mm)

Label Width 2.5 in (63.5 mm)Length 0.94 in (23.9 mm)

Paper thickness 0.0079 in (0.2 mm) or less including base sheet0.0047 in (0.12 mm) or less without base sheet

Quality Plain paperNote) Labels must be printed under normal room temperatures.

1.2.5.8 BannerSize Width 8.32 in (210 mm) to 17.0 in (432 mm)

Length 196.9 in (5.0 m) or lessThickness 0.0031 in (0.08 mm) to 0.0039 in (0.1 mm)Weight 17 lb (64 g/m

2) to 22 lb (82 g/ m

2)Quality Plain Paper

1.2.5.9 Canvas Paper

Size Width 8 3 in (210 mm) to 17 0 in (432 mm)

Table 1-8. Index Card Size

Table 1-9. Label Size


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1.2.6 Printable Area

Cut Sheets

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

(PaperWidth) Set to rightedge Set to leftedge Set to rightedge Set to leftedge (Top Margin) (BottomMargin)

A4297 mm(11.87)

0.12 in(3 mm)

0.12 in(3 mm)

0.12 in(3 mm)

0.12 in(3 mm)

0.12 in(3 mm)

0.54 in(14 mm)

Legal (L)356 mm(14.0)

0.12 in(3 mm)

0.20 in(5 mm)

0.20 in(5 mm)

0.12 in(3 mm)

0.12 in(3 mm)

0.54 in(14 mm)

B4 (L)364mm (14.3) 0.12 in(3 mm) 0.63 in(16 mm) 0.63 in(16 mm) 0.12 in(3 mm) 0.12 in(3 mm) 0.54 in(14 mm)A3 (L)

420 mm(16.5)

0.51 in13 mm

0.98 in(25 mm)

2.32 in(62 mm)

1.85 in(50 mm)

0.12 in(3 mm)

0.54 in(14 mm)

Ledger (L)432 mm

0.98 in(25 mm)

0.98 in(25 mm)

2.32 in(62 mm)

2.32 in(62 mm)

0.12 in(3 mm)

0.54 in(14 mm)

PW

LM RM

TM

BM

PLPrintable Area

Figure 1-3. Printable Area for Cut Sheets

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


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Product Description

Envelopes

LM (Left Margin)(minimum)

RM (Right Margin)(minimum)

TM (Top Margin)(minimum)

BM(Bottom Margin)

(minimum)0.12 in(3 mm)

0.12 in(3 mm)

0.12 in(3 mm)

0.54 in(14 mm)

LM RM

TM

BM

Printable Area

Figure 1-4. Printable Area for Envelopes

Table 1-11. Minimum Margins for Envelopes


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Continuous PaperNote) 1. Printable area of labels (continuous) is the same as for continuous paper.

2. Base sheet of labels (continuous) is not within the printable area.

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

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

Perforation

More than134 mm (5.28")More than

14 mm (0.55")

Printable Area 1

Printable Area 2

Printable Area 2

Printable Area 2

Printable Area 2

Printable Area 1

Printable Area 1

Printable Area 1

*1 : When the paper width is more than 406.4 mm (16"), this width is more than38 mm 1.50" .

13 mm (0.51") *1More than 13 mm (0.51") *1More than

More than12.5 mm (0.49")

More than9 mm (0.35")More than9 mm (0.35")

More than3 mm (0.12 ")

More than9 mm (0.35")More than9 mm (0.35")

Perforation

Perforation Perforation

Perforation

Figure 1-5 Printable Area for Continuous Paper


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1.2.8 Ink Specifications

1.2.8.1 Black ink cartridge

Black Ink CartridgeType Exclusive ink cartridgeColor BlackPrint capacity 900 pages / A4 (ISO/IEC10561 Letter Pattern at 360 dpi)Ink life 2 years from indicated production dateStorage Temperature At storage -4 to 104 F (-20 to 40 C) * 1

At packing storage -22 to 104 F (-30 to 40 C) * 1At transit (Packed) -22 to 104 F (-30 to 60 C) * 1 *2

Dimension 1.22 in (W) X 2.36 in (D) X 1.57 in (H)(30 mm X 58 mm X 38.5 mm)

* 1Within a month at 104 F (40 C)*2Within 120 hours at 104 F (60 C) for more than 120 hours

1.2.8.2 Color Ink Cartridge

Color Ink CartridgeType Exclusive ink cartridgeColor Magenta, Cyan, YellowPrint capacity 320 Letter, 300 A4 (at 360 dpi, 5 % duty each color)Ink life 2 years from indicated production dateStorage Temperature At storage (-20 to 40) * 1

At packing storage (-30 to 40) * 1At transit (Packed) (-30 to 60)* 1 *2

Dimension 1.75 in (W) X 2.30 in (D) X 1.57 in (H)(42.9 mm X 56.5 mm X 38.5 mm)

* 1Within a month at (40) for more than a month.*2Within 120 hours at (60) for more than 120 hours.

1. Do not refill the cartridge. The ink cartridge is a consumable item. 2. Do not use a cartridge that has exceeded its ink life. 3. Ink freezes below 23 F (-4 C); however, it will be usable again after keeping it frozen for more

than 3 hours at room temperature.

1.2.9 Input Data BufferInput data buffer 64 Kbytes

Table 1-13. Black Ink Cartridge Specifications

Table 1-14. Color Ink Cartridge Specifications

P d D i i


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Product Description

1.2.10 Electric Specifications

120 V version Rated voltage 120 VAC Input voltage range 103.5 to 132 VAC 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, 500 VDC) Dielectric strength 1,000 VAC rms. (1 minute) or 1,200 VAC rms. (1 second)

(Between AC line and chassis)220 - 240V version

Rated voltage 220 to 240 VAC Input voltage range 198 to 264 VAC 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, 500 VDC) Dielectric strength 1,500 VAC rms. (1 minute) (Between AC line and chassis)

1.2.11 Environmental ConditionsTemperature

Operating*1 (10 to 35C) Non operating*2 -4 to 104 F (-20 to 40 C) (for less than 1 month at 104)

-4 to 140 F (-20 to 60 C) (for less than 120 hours at 140)Humidity

Operating*1 *3 20% to 80% RH (without condensation) Non operating*2 *3 5% to 85% RH (without condensation)

Resistance to Vibration Operating 0.15 G Non-operating*2 0.50 G

Resistance to Shock Operating 1 G within 1 ms Non-operating*2 2 G within 2 ms

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



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1.2.12 ReliabilityTotal print volume 75,000 pages (Letter/ A4)Print head life 2,000 million dots /nozzle

1.2.13 Safety Approvals120 V version

Safety standards UL1950 with D3 CSA22.2 No. 950 with D3

EMI FCC part15 subpart B class B220 - 240 V version

Safety standards EN 60950 (TV, NEMKO) EMI EN 55022 (CISPR Pub.22) class B

AS/NZS 3548 class B)

1.2.14 CE Marking220 - 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

90

80

70

60

50

0

30

0

10 20 27 30 35 40Temperature ( )

Humidity (%)

(80 H) (95 H)(50 H)C C C C C C

C

Operating environment

Guaranteedrange

Figure 1-7. Environmental Conditions

Product Description


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Product Description

1.3 Interfaces

1.3.1 Parallel Interface

1.3.1.1 Forward Channel SpecificationsTransmission mode 8 bit parallel , IEEE-P1284 compatibility modeSynchronization /STROBE pulseHandshaking BUSY and /ACKNLG signalSignal level TTL compatible level (IEEE-P1284 Level 1 device)

Parameter Minimum Maximum ConditionVOH* - 5.5 VVOL* -0.5 V -IOH* - 0.32 mA VOH = 2.4 VIOL* - 12 mA VOL = 0.4 VCO - 50 pfVIH - 2.0 VVIL 0.8 V -IIH - 0.32 mA VIH = 2.0 VIIL - 12 mA VIL = 0.8 VCI - 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 ohms to ground.

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

During data entry (see Figure1-8. 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)

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

DATA (n )DATA DATA (n+1 )

STROBE

0 5 s (min )



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Paper-out error Paper-jam error Ink-out error

The PE signal is high level during paper-out error.Table 1-16 shows the connector pin assignment and signals for forward channel of the parallel interface.

Parameter Minimum Maximumtsetup 500 ns -thold 500 ns -tstb 500 ns -

tready 0 -tbusy - 500 ns

tt-out* - 120 nstt-in** - 200 nstreply - -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.

Pin No. Signal Name ReturnGND Pin

I/O Description

1 /STROBE 19 IThe strobe pulse. Read-in of data isperformed at the falling edge of thispulse.

2-9 DATA 0-9 20-27 IThe data 0 to data 7 signals representdata bits 0 to 7, respectively. Each signal

is at HIGH level when data is logical 1and LOW level when data is logical 0.10 /ACKNLG 28 O This signal is a negative pulse indicating

that the printer can again accept data.11 BUSY 29 O When this signal is at HIGH level, the

printer is not ready to accept data.12 PE 28 O When this sign is at HIGH level, the paper

empty status is detected.13 SLCT 28 O Always at HIGH level when the printer is

powered on.14 /AFXT 30 I Not used.31 /INIT 30 I The falling edge of a negative pulse or a

low signal on this line causes the printerto initialize. Minimum 50 us pulse isnecessary.

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

Table 1-16. Data Transmission Timing

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

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p

1.3.1.2 Reverse Channel SpecificationsTransmission mode IEEE-1284 nibble modeAdaptable connector Same as for the forward channelSynchronization Refer to the IEEE-1284 specificationHandshaking Refer to the IEEE-1284 specificationData transmission timing Refer to the IEEE-1284 specificationSignal 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.

Pin No. Signal Name ReturnGND Pin

I/O Description

1 HostClk 19 I Clock signal from the host computer.2-9 DATA 0-7 20-27 I These signals represent parallel data

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

10 PtrClk 28 O Clock signal from the printer11 PtrBusy /

Data bits 3,729 O Busy signal from the printer.

Data bit 3 or 7 in reverse channel.12 AckDatareq /

AckData Bits 2,628 O Acknowledge request signal.

Data bit 2 or 6 in reverse channel.13 Xflag/Data bit 1,5 28 O X flag signal.

Data bit 1 or 5 in reverse channel.14 HostBusy 30 I Busy signal from the host computer31 /INIT 30 I Not used32 /Data Avail /

Data bits 0,429 O Data available signal.

Data bit 0 or 4 in reverse channel.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 - - Signal ground.15,34 NC - - Not connected.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 IDThe printer sends following device ID string when it is requested.

[00H] [xxH]

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



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1.3.2 Mac Serial Interface

1.3.2.1 Serial Interface Specifications

Standard RS-423 compliant Synchronization Synchronous Bit Rate Approximately 900 Kbps, 1.8 Mbps Word Format Start bit1 bit

Data bit 8 bitsParity bit No parity bitStop bit1 bit

Handshaking X-ON/XOFF, DTR protocol

Adaptable Connector 8-pin mini circular connectorRecommended I/F Cable Apple System Peripheral-8 cable

Pin No. Signal Name I/O Function Description1 SCLK O Synchronous clock2 CTS I Clear to send3 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 ready8 RxD+ I Balanced receive +

Table 1-19. Connector Pin Assignment for Serial Interface

12

345

678

Figure 1-9. Serial Interface Connector Pin

Assignments

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

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1.3.3 Optional InterfaceThe EPSON Stylus COLOR 1520 supports an optional Type-B interface (Level 2) with the followingcharacteristics.

Reply messages When ESC/P2 is selected:

Main type MTP48p, PW136cl10cpi, PRG(W0xxxx)rev, AP800ma, SPD0fastProduct name Stylus COLOR 1520Emulation type ESCPL2-00Entity type EPSONLQ2

When X24E is selected:Main type MTP48p, PW136cl10cpi, PRG(W0xxxx)rev, AP800ma, SPD0fastProduct name Stylus COLOR 1520

Emulation type PRPXL24-00Entity type EPSONPRPXL24

Option Command No. Command Name Reply-A Reply-B00h No operation Accept None01h Start hardware reset Accept Execute OK02h Start software reset Reject

03h Send main system type Accept04h Send name data Reject05h Inquire name data Accept06h Send product name Accept07h Send soft ware emulation type Accept08h Complete buffered data Accept Check Condition09h Stop procedure Reject Execute OK0Ah Return buffered data Reject0Bh Send entity type Accept

0Ch Send status Accept0Dh Quit procedure Reject0Eh Inquire ASCII message Reject0Fh Send ASCII message Accept None

10h - 13h Unknown None14h Inquire emergency message Accept Execute OK15h Send emergency message Accept

16h - 1Fh Unknown None20h - FFh Reserved None

Main Command No. Command name Sending Timing01h Start software reset /INIT signal on the std. parallel I/F

Type-B I/F option command : 01hCold Start

Table 1-21. Replies for Option Commands

Table 1-22. Supported Main Command and Sending Timing



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Sending BDC-ST through DBIN registerWhen 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 Maincommand 0Eh.

1.3.4 Preventing Data Transfer Time-out from HostsGenerally, hosts abandon data transfer to peripherals when a peripheral is BUSY continuously for dozens ofseconds. To prevent this kind of time-out, the printer receives data very slowly, several bytes per minute,even if the printer is in a busy state. This slowdown starts when the remainder of the input buffer drops underseveral hundred bytes. Finally, the printer is BUSY continuously when the input buffer is full.

1.3.5 Interface SelectionThe EPSON Stylus COLOR 1520 has three types of interfaces available: parallel, serial, and optionalinterfaces. Each interface can be selected manually or automatically. Both modes are selected thorough thedefault setting mode.

Manual selectionOne of 3 interfaces selected through the default setting mode. The selected interface is fixed.

Automatic selectionWhen the printer is in this mode, the printer is initialized to the idle state when it is turned on. Then theinterface that receives data first is selected. When the host stops data transfer and the printer is in thestand-by state for the specific time, the printer returns to the idle state. As long as the host sends data orthe printer interface is in busy 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.

Note) An interrupt signal such as the /INIT signal on the parallel interface is ignored while that interface is not selected.

1.3.6 Printer language and Control CodesPrinter languages and control codes ESC/PC

IBM X24EEPSON Remote

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1.4 OperationsThis section describes the function of each button on the control panel and LED printer status indicators.

1.4.1 Control PanelThe control panel of this printer consists of 6 non-lock push switches, 1 lock type push switch, and 6 LEDindicators for easy operation of the various printer functions. Refer to Figure1-10 .

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

Operate

Cover Open

Ink Out

Ink Out

Paper Out

Alt

LF/FF

Cleaning

Load/Eject

Cleaning

Micro FeedMicro FeedReset

5sec

(2)(1) (3) (4) (5)

(6)

Figure 1-10. Control Panel



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Panel Functions

The function of each button is described below. Power Function Turns the printer off or on *1.

Available at Always

Load/Eject Function Loads and ejects the paper.Available at Pause/Stand-by

LF/FF Function Feeds one line or page.Available at Pause / Stand-by

Pause Function Alternates the printer between printing and non-printing states.Available at Pause / Stand-by

Function Pressing for 3 seconds resets the printer.Available at Pause / Stand-by

Micro-adjust Function Feeds paper forward and is used to execute TOFadjustment *2 and Tear off adjustment *3.

Available at Pause / Stand-by

Micro-adjust Function Feeds paper backward and performs TOF adjustment *2 and Tear off adjustment *3.Available at Pause / Stand-by

Cleaning (Black) Function Executes the black ink cartridge cleaning.Available at Pause

Cleaning (Color)Function Executes the color ink cartridge cleaning.Available at Pause

Alt Function Enters ink cartridge change mode. Pressing this buttonfor 3 seconds moves the ink cartridge to the position tobe replaced.

Available at Pause / Ink out

Notes)*1Before the printer power is off, the printer executes the capping function.*2When 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.*3When the micro adjust is performed at the tear off position, the new setting is stored in the corresponding address in the EEPROM.

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1.4.2 Panel Functions at Power OnThis printer enters various functions by turning on the printer while holding down a button(or buttons). Each combination and corresponding function is described in the table below.

Button Pressed * 1

(while turning on the printer)Function

Micro Adjust Enters default setting mode. (See Section 1.4.4.)Pause Enters printer adjustment mode. (See Section 1.4.5.)Load /Eject Starts LQ self-test printing.LF/FF Starts draft self-test printing.LF/FF + Load/Eject Enters hex-dump mode.Alt + LF/FF + Load/Eject+ Micro Adjust

Enters EEPROM and Timer IC reset *2 mode.

Note) * 1 + means to press one button while holding down the other button(s).* 2 EEPROM and Timer IC must be reset only by qualified service personnel.

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

Table 1-23. Panel Functions at Powered On

CAUTION



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1.4.3 LED IndicatorsSeveral printer conditions are indicated by the LEDs on the control panel. When any of the errors listedbelow occurs, the printer indicates an error condition, the /ERROR signal is LOW, and BUSY is HIGH,stopping data transfer. This automatically puts the printer into a paused state.

The carriage moves abnormally (fatal error). Paper is out or there is paper jam. The PG for the paper currently loaded is inaccurate. No ink cartridge or ink is out. Maintenance is required.

IndicatorsPrinter status Power Cover Open Ink out(black)

Ink out(color)

Paper Out Pause

Power on On Cover open On Paper out On Paper jam Blinks No ink cartridge orink end (black)

On

Ink level low (black) Blinks No ink cartridge orink end (color)

On

Ink level low (color) Blinks Enter EEPROM andTimer IC reset

On(1 second)

On(1 second)

On(1 second)

On(1 second)

On(1 second)

On(1 second)

Maintenance request Blinks Blinks Blinks Blinks Blinks BlinksFatal error Blinks BlinksLever error Blinks BlinksCapping function inthe power off

Blinks

Data exit Blinks In the sequence ofink cartridge changemode

Blinks

Default setting mode Blinks Notes)

1.

- means no effect.2. Fatal error is cleared by turning the printer off and back on or by inputting the /INIT signal after the problem is solved.

3. Maintenance is required when the waste ink drain pads are filled with waste ink to the specified limit. To clear the condition, reset the EEPROM. (See Section 1.4.2 Panel functions at power on) Refer to Chapter 2 or Chapter 3.

Table 1-24. Printer Condition and Panel Status

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1.4.4 Cover Open Sensor

The sensor performs following:

If the printer cover opens during printing: The CR returns to the home position slowly after printing the current pass. The cover open LED

lights up and the printer goes into the stand-by state. To recover, close the cover and press the pause button to continue to print. The cover open LED

goes off with recovery.If the printer cover opens during cleaning:

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

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

If the cover opens while the printer is in the stand-by: The cover open LED lights up and the printer stops functioning. *1 To recover, close the printer cover.

* 1 The interface is in the BUSY status and the switches on the control panel are ineffective.

The cover open sensor controls carriage movement that can cause harm to the user.

1.4.5 Default SettingThis printer has user-selectable default settings that it refers to at initialization. This section describes thesetting method and setting menus.

1.4.5.1 Setting MethodSee the flowchart on Page 1-26 for the default setting method.

Be sure to turn off the printer off after the default setting operation is executed, since adjustment values are not stored in the EEPROM until the printer is turned off.

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

CAUTION

CAUTION



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Change the settings?

NO

YES

NO

Start

YES

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

Make more changes?

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

2.Select the language by pressing the Pause button.

Press the Micro Adjust button andturn the printer on.The printer prints "Usage of thismode" and firmware version number.

1. Select the menu by pressing theAlt button.

2. Press the Pause button.

LED indicators show the values for theselected menu.

1. Scroll the values by pressing theLoad/Eject button.

2. Select the value by pressing the Alt button.3. Press the Pause button.

The printer memorizes the setting value andchanges the indication to the main menu.

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

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1.4.5.2 Setting MenusThe default setting menus are described in the table below.

Menu Setting * 1

Print direction*2 Auto / Bi-d / Uni-DFont Roman / Sans Serif / Courier / Prestige / Script/

Roman T / Sans Serif H / DraftPitch 10 cpi / 12 cpi / 15 cpi / 17.1 cpi / 20 cpi / ProportionalI/F mode Auto / Parallel / Mac Serial / OptionAuto I/F wait mode 10 seconds / 30 seconds

Software ESC/P2 / IBM X24EAuto CR (IBM mode only)On / OffAGM (IBM mode only) On / OffCharacter tables Standard version

ItalicPC 437 , PC 850PC 860, PC 863PC 865, PC 861BRASCII, AbicompRoman 8, ISO Latin 1

PC 437 (Greek), PC 853PC 855, PC 852PC 857, PC 866PC 869, MOZOAWIACode MJK, ISO 8559-7ISO Latin 1T, BulgariaPC 774, EstoniaISO 8859-2, PC 866 LAT

International character set

for Italic table

Italic USA , Italic France

Italic Germany, Italic U.KItalic Denmark, Italic SwedenItalic Italy, Italic Spain 1

Auto line feed On / OffNetwork I/F mode This mode is for network environment.

Off : Used in usual environmentOn: Used in network environment

0 slash 0 /Page length 11 inch / 12 inch / 8.5 inch / 70/6 inch / other

Skip over perforation On / OffAuto tear off On / OffBanner mode *3 On / OffParallel I/F transfer rate Fast / Normal

Note) 1. Underlined parameters in bold are factory default settings.2. Refer to Table 1-26 and Table-27.

Table 1-25. Default Setting Menu



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Black and White Printing YMCK Printing (color)

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

Bi-D Throughput is the best. Print quality may be down.

Throughput is the best. Color quality with special paper is

worse. (Color correction depends on the print direction.)

Uni-D Throughput is worse. Print quality is the best.

Throughput is worse. Color quality is the best.

Character Mode(for DOS)

Taster GraphicsMode

(for Windows / Mac)ESC U 0 Auto Bi-D

Auto ESC U 1 Auto Uni-DESC U 2 Auto Auto

Auto AutoESC U 0 Bi-D Bi-D

Default Bi-D ESC U 1 Uni-D Uni-DSetting Mode ESC U 2 Auto Auto

Bi-D Bi-DESC U 0 Uni-D Bi-D

Uni-D ESC U 1 Uni-D Uni-DESC U 2 Uni-D Auto

Uni-D Uni-D

Table 1-26. Print Direction Mode Characteristics

Table 1-27. Printing Direction and ESC U Command

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FunctionTrigger Banner mode Off

(Manual Insertion Operation)

Banner Mode On

Command FF 1. Case that page length is setby ESC (C Eject

2. Case that page length is notset by ESC (C Advances to the top- margin of the next page

Advances to the top-margin positionof the next page.

ESC EMR No operation No operation

Switch FF Eject Advances to the top-margin positionof the next page.Eject Eject (maximum 44 inches) Advances to the top-margin position

of the next page.Data Over the page length

set by command 1. Case that page length is set

by ESC (C Eject

2. Case that page length is notset by ESC (C

No operation

No operation

Over the paperlength

Eject Eject

1.4.6 Printer Adjustment ModeThe 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 .

Table 1-28. Vertical Print Position in Manual Insertion


1 4 6 1 Adj t t M th d


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1.4.6.1 Adjustment Method

1.4.6.2 Adjustment Patterns

Adjust the printer?

NO

YES

NO

Start

YES

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

Make more adjustments?

Press the Load/Eject button.

1.Move through the languages listed by pressing the Alt button.2.Select the language by pressing the Pause button.

The printer prints the instructionsheet on how to adjust the printer.

Press the Pause button, and turnon the printer.

The printer prints the instructionsheet on how to select the language.

1. Select the appropriate test bypressing the Alt button.

2. Press the Load/Eject button.

The printer prints the test patterns.

Select the most closely aligned patternby pressing the Pause button.

Figure 1-12. Printer Adjustment Flowchart

Table 1-29. Printer Adjustment Patterns

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1.4.7 Printer InitializationThis printer has three initialization types: Power-on initialization, Operator initialization, and Softwareinitialization.

Power-on InitializationThis 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 InitializationThis printer is initialized when Pause button is pressed for 3 seconds, or the printer recognizes the /INITsignal (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 InitializationThis initialization is performed by the ESC @ command and the following actions are performed:

Clears the print buffer. Sets default values.

1.4.8 Self-test Printing ModeThis 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 theprinter. To enter the draft self-test printing mode by pressing the LF/FF button while turning on the printer.

1.4.9 Hexadecimal Dump FunctionPressing the LF/FF and Load/Eject buttons while turning on the printer activates the hexadecimal dumpmode. Each line has Hexadecimal codes, along with their corresponding letters printed in the right column. Ifa received code denotes an unprintable character such as a control code, . (period) is printed in the rightcolumn. This function enables users to check whether the data from the host is properly transferred. Turn offthe printer to exit the mode.

1.4.10 Monochrome Printing ModeWhen the printer is in the ink end (color) condition, the black ink is substituted to continue to work. In order toswitch to monochrome printing mode, turn the printer off and back on. This mode is also selected by thecommand ESC (K) . The Color select command ESC r is ignored in this mode.



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1.5 Physical SpecificationsWeight 6.5 Kg

Dimension 26.2 in (W) X 21.8 in (D) X 7.9 in (H) (666 mm X 554 mm X 202 mm)Refer to Appendix for details.

1.6 Main ComponentsThe main components of the EPSON Stylus COLOR 1520 are designed for easy removal and repair. Theyare as follows:Main control board C211 MAIN BoardPower supply board C172 PSB/PSE BoardControl panel bardPrinter mechanism M-4160Housing

1.6.1 C211 MAIN BoardThis 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 driveICs, printhead drive circuit, etc.

Gate Array E05B33CPULithium Battery

Gate Array E05B34

PROM 8M

DRAM 4MMROM Reset IC EEPROM

Timer IC

PF Motor Drive IC

CR Motor Drive IC

Printhead Common Drive Circuiterial Interface IC

Product Description


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1.6.2 C172 PSB/PSE BoardThis board consists of a transformer, switching FET, regulator IC, diode bridge, fuse, and so on.

Fuse Regulator IC Transformer

Diode Brid e Switchin FET

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


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Chapter 2Operating 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 ..................... ......................... ........................ .......... 2-8 2.2.6. Ink System........................................... ........................ ......................... ............................. 2-9

2.2.6.1. Pump Mechanism .............................................................................................. 2-10 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

Operating Principles

2.1 Overview


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

2.2 Printer Mechanism Operating Principles

2.2.1.1 M-4I60 Printer MechanismThis printer is composed mainly of the printhead unit, paper feeding mechanism, CR mechanism and thepump mechanism. The block chart for the printer mechanism is shown in Figure 2-1. The printer mechanismof this printer has 2 motors: CR and PF. The torque from the CR motor moves the CR in the columndirection. The torque from the PF motor is transmitted to both the paper feeding mechanism and the pumpmechanism. The direction is determined by the CR position. The release lever transmits torque from the PFmotor to the tractor side to feed continuous paper.

Release Lever

Disengage Mechanism

PF Motor

CR Motor

Color

Push Tractor Mechanism

Paper Feed Mechanism

ASF Mechanism(For cut sheets only)

Pump Mechanism

CR Unit

Black

Figure 2-1. Printer Mechanism Block Diagram


2 2 2 Printing Mechanism


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2.2.2 Printing MechanismThe printer uses an on-demand ink jet system to print, as used by other EPSON ink jet printers. This printer,however, has a new printhead, which is designed to produce high quality output at a higher speed. Theprinting mechanism has 2 parts: ink cartridge and printhead.

2.2.2.1 Printhead StructureThis printer has a black printhead and color printhead. The structures of the printheads are basically thesame except for the nozzle configuration. The black printhead has 128 nozzles (32 nozzles for each of 4rows) The color printhead, with 3 heads for Magenta, Cyan, and Yellow, has 64 nozzles (32 nozzles for eachof 2 rows) for each color.

Printhead Driver Circuit Board To the ink cartridge.

Piezo

Cavity

Nozzle

Nozzle Plate

Figure 2-2. Printhead Structure


2 2 2 2 Printing Process


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2.2.2.2 Printing ProcessThe stages below describe how with the on-demand ink jet system ejects ink from each nozzle.Step 1 Normal stateWhen no print signal is output, the PZT does not move and the pressure in the cavity is kept at a constant

level.Step 2 Ejecting stateA print signal is output by the head driver board to a specific nozzle to drive the PZT. The voltage isproduced in the common driver circuit board on the control board. When voltage is applied to the PZT, thePZT moves and the pressure in the cavity changes. This operation causes the ink in the cavity to spurt outfrom the nozzle.

During ink charging or cleaning, negative pressure in the cavity absorbs the ink from the cartridge to refill thecavity. The unused ink adheres to the nozzle surface and increases viscosity in the nozzles, causing lowprinting quality. To prevent this problem, the ink is periodically absorbed and sent into the waste ink drainpads by the pump mechanism. Ink viscosity tends to change with the temperature around the printhead. Toprevent this, a thermistor is attached to the driver circuit board. This is used to determine the proper drivepulse automatically based on the detected temperature.

2.2.2.3 Printing MethodsThis printer has special printing modes for various types of graphic images.

Double-Firing Normal Dot / One Dot Print ModesIn ANK or bitmap image mode the printer forms 1 dot with double ink ejections. In raster graphics mode,which requires high-resolution, it forms 1 dot with a single ink ejection.

EPSON Micro Dot PrintingBoth black and color printouts can be made in normal dot print mode and EPSON micro dot print mode.In the normal dot print mode, the printer uses less ink to create sharper dots. This expands the gradationrange for a more delicate tone. This mode is available when 1440 720-dpi-paper or glossy film isselected.

Normal StatePiezoCavity

Nozzle

Ejected Ink

Ejecting State

Figure 2-3. Printing Operation States

EPSON Stylus COLOR 1520 Table 2-1. Special Printing Options


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Paper Type 180 dpi 360 dpi 720 X 360dpi

720 dpi 1440X720dpi

Black Printing Raster Data 360 dpiExclusivePaper

1 Dot PrintingNormal DotMicroweave

720 dpiExclusivePaper



OHP sheet 2 Dot PrintingNormal DotMicroweave

Glossy FilmGlossy Paper



Normal Paper 2 Dot PrintingNormal DotMicroweave



Color Printing Raster Data 360 dpiExclusive


720 dpiExclusive 1 Dot PrintingNormal Dot

Microweave


OHP Sheet 2 Dot PrintingNormal DotMicroweave

Glossy FilmGlossy Paper



Normal Paper 2 Dot PrintingNormal Dot 2 Dot PrintingNormal Dot 1 Dot PrintingNormal DotMicroweave

Bitmap Image Data For ANK 360 dpiExclusive

2 Dot PrintingNormal Dot

2 Dot PrintingNormal Dot


2.2.3 Carriage (CR) Mechanism


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2.2.3 Carriage (CR) MechanismThe CR mechanism is composed of the CR unit, CR motor, timing belt, CR guide shaft, paper eject frame,and HP sensor (Home Position sensor). Torque from the CR motor is transmitted via the timing belt to theCR unit right and left along the paper eject frame and CR guide shaft, depending on the way the CR motorrotates. The CR is detected at the home position by the HP sensor when the printer is turned on. Its positionis controlled by an open loop. Table 2-2 and 2-3 show the specifications for the CR motor and its drivefrequencies.

Item DescriptionMotor type 4-phase / 200-pole / HB-type pulse motorDrive voltage 42 VDC 5%

Coil resistance 5 7% at 77 F (25 C) per phaseExcitation mode Unipolar drive1-2 phase, 2w 1-2 phase: Constant current drive

Drive frequency 480 ~ 9600 HzMinimum step 0.106 mm / pulse (1-2 phase drive)

0.026 mm / pulse (2 W 1-2 phase drive)

Printmode

Print speed Acceleration1

Acceleration2

Constant Deceleration1

Deceleration2

Draft 400 cps 0.96 0.96 0.70 0.70 0.70LQ 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

Table 2-2 CR Motor Specifications

Table 2-3 CR Motor Driver Terms

CR Unit

Timing Belt

Sub Pulley

CR Motor Pulley

HP Sensor



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2.2.4 Paper Feed MechanismThe paper feed mechanism of this printer consists of the integrated ASF (Auto Sheet Feeder), tractor, PF(Paper Feed) motor, front/rear PE (Paper End) sensors, PF roller, paper guide mechanism, paper eject unit,and PF motor drive disengage mechanism. Torque from the PF motor is transmitted to load, feed and ejectpaper. While the printer is not printing, the disengage mechanism switches torque from the PF motor to thepump mechanism. While paper is being fed, the PF motor transmits torque via the PF motor pinion gear anddisengage gear to the PF roller, where torque goes 2 directions. One is to the paper eject mechanism via thegear train in the paper guide assembly. The other is 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 show thespecifications for the PF motor and drive terms. Figure 2-5 illustrates the paper feed mechanism.

Item DescriptionMotor type 4-phases / 96-pole / HB-type pulse motorDrive voltage 42 VDC 5%Coil resistance 10 10% at 77 F (25 C) per phaseConnection BipolarExcitation mode 2-2 phase, 1-2 phase, W1-2 phase constant current driveMinimum step 1/720 inch / step (2-2 phase drive)

Operationmode

Acceleration Constant Deceleration Stand-by

Paper feed(Line feed:6/1 inch)

0.9/0.9 0.9 0.75/0.75 0.6

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

(slow)

/ 0.9

/ 0.6

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

Table 2-4 PF Motor Specification

Table 2-5 PF Motor Drive Terms

Operating Principles Tractor Disengage Gear PF Motor

PF Motor Pinion GearDisengage GearTo the tractor

mechanism


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2.2.4.1 ASF (Auto Sheet Feeder) MechanismThe PF roller creates torque that is transmitted to the pick up roller in the ASF mechanism via the planetarygear. The PF motor drive disengage mechanism switches the torque based on the detected position of theCR unit. The pick up roller shaft has 2 arms on the right and left, which push down the paper support so thepaper surface contacts the pick up roller. The one way clutch rotates the pick up roller to load paper. Thepaper feed mechanism feeds the loaded paper and disengages the gear transmission from the planetarygear.

mechanism.To the ASFmechanism.

ASFTransmission Gear

PF Drive Roller

Paper Eject Roller Shaft

Pump Mechanism

Paper Eject Roller ShaftPaper Eject Roller Unit

Figure 2-5. Paper Feeding Mechanism

ASF MechanismPickup Rollers

Paper

One Way ClutchDisengage Gear

Pinion Gear PF Motor

Arm


2.2.4.2 Tractor MechanismWhen the release lever is moved, the PF motor sends torque to the gears at the left end of the PF roller that


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is transmitted to the tractor gears via the disengage mechanism. When the release lever is set to the tractorside, the release sensor detects the position and torque from the ASF mechanism is disengaged.

2.2.4.3 Manual Feed Mechanism

The printer loads cut sheets and roll paper through the rear paper slot. While paper is detected by the rearPE sensor, the CR unit is out of the ASF paper feeding position. Therefore, paper must be loaded manually,even if there is paper in the ASF.

2.2.5 Platen Gap (PG) Adjust MechanismThe PG adjust mechanism, at the top right of the printer mechanism, allows the user to set the proper platengap (distance between paper and nozzle surface) for the paper thickness to prevent ink from smudging. ThePG adjust mechanism consists of the PG adjust lever, CR guide shaft, and parallelism adjustment bushing.The parallelism adjustment bushing joins the CR guide shaft, with an eccentricity toward the guide shaft.Shifting the lever from 0 to 1 rotates the CR guide shaft away from or toward the platen, changing theplaten gap from wide to narrow or vice versa.

Paper Type Adjust Lever Position PG Adjustment ValueCut Sheets, OHP Sheets,

Labels, Continuous paper

Rear 0

Envelopes, Cards, Indexcards

Front + 0.03 in (0.7 mm)

Tractor Disengage GearRelease Lever

Rear PE SensorPF Motor

PF Motor Pinion Gear

Disengage Gear

PF Roller

Figure 2-7. Tractor Mechanism

Table 2-6. Platen Adjust Lever Positions


PG Adjust Lever


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2.2.6 Ink SystemThe ink system is composed of the following mechanisms:

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

0

{

Parallelism Adjustment Bushing

Eccentricity

Platen Surface

Platen Gap

CR Guide Shafts

0 +

Printhead

Figure 2-8. Platen Gap Adjustment Mechanism

EPSON Stylus COLOR 1520 The figure below shows the structure of the ink system.

Color Ink Cartridge Black InkCartridge Cleaner Head for


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2.2.6.1 Pump MechanismThe PF motor also functions as the pump motor when the PF motor drive disengage mechanismswitches its operation. When the CR unit returns to the home position, its switch lever pushes the camlever. The disengage gear switches torque from the ASF to the pump mechanism via the gear train.Figure 2-11 illustrates how the torque is transmitted from the paper feed mechanism to the pumpmechanism.

g Cartridge Cleaner Head forBlack and Color Ink

Clutch Unit

Combination Gear

Disengage Gear

Gear

Pump UnitPump 1

Pump 2

Air Valves

PF Motor

Waste Ink Drain Pads

Figure 2-9. Ink System Mechanism


PF Motor Drive Disengage Mechanism Switch Lever(CR)


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Release Cam Set LeverASF Transmission Gear set Lever

Release Lever

Release Cam

Switch Lever (CR) PF Motor Drive Disengage Mechanism

Disengage Gear

Torsion Spring

The direction in which the CR moves.

Figure 2-10. Release Cam Reset

CR Unit PF Motor Pinion Gear

PF Motor

Disengage GearSwitch LeverRelease Cam

EPSON Stylus COLOR 1520 When the CR unit shifts from the right end to the left end, the lever in the CR unit pushes thecam release. Then the disengage gear switches torque from the pump mechanism to the paperfeed mechanism. Figure 2-13 illustrates how torque is transmitted from the pump mechanism tothe paper feed mechanism


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the paper feed mechanism.

Switch Lever (CR)

Disengage Mechanism

Path of the CR

Release Lever Release Cam

Figure 2-12. Release Cam Reset (2)

CR Unit PF Motor Pinion GearPF Motor

Disengage Gear

Switch Lever

Release Cam

Operating Principles The pump mechanism absorbs ink inside the printhead and drains ink to the waste ink drain pads via thecap. Since the printer has black and color printheads, the pump mechanism functions for the both by usingthe alternating directions of the PF motor. When the PF motor rotates forward (the direction for feedingpaper) the pump is used for the black printhead When the PF motor rotates backward (the direction for


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paper), the pump is used for the black printhead. When the PF motor rotates backward (the direction forfeeding back paper) the pump is used for the color printhead. The pump mechanism is composed of 2rollers, a tube, and a pulley. To draw ink, the pulley rotates the rollers, squeezing the tube to produce

negative pressure, absorbing the ink and draining it to the waste ink drain pad.

Pulley

Ink Draining

Ink Drawing

PF Motor (Backward): Color Ink Drawing PF Motor (Forward): Black Ink Drawing

Ink Draining

Ink Drawing

Pulley

No Ink Draining

No Ink Drawing

No Ink Draining

No Ink Drawing

PF Motor (Forward): No Color Ink DrawingPF Motor (Backward): No Black Ink Drawing

Figure 2-14. Pump Operation


2.2.7 Capping MechanismThe capping mechanism covers the printheads with the cap holders to prevent ink around the nozzles fromincreasing in viscosity while the printer is in stand by or power is off The cap is individually equipped for the


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increasing in viscosity while the printer is in stand-by or power is off. The cap is individually equipped for theblack and color printheads. When the CR moves right, the cap holder also shifts right and strikes the rightframe. This motion opens the air valve to release air in the cap. To start printing, the CR moves right from

the home position to strike the right frame with the cap holder so that the air valve opens. This bringsnegative pressure in the cap back to normal and the CR goes back to the home position. The power switchof the printer uses a secondary circuit that keeps power on until the capping operation is complete, even ifthe printer is turned off during the operation.

Black Ink Cartridge Color Ink CartridgeCap Holder

Cap 2

Cap 1

Air Valve Hinge1'

1

To the waste ink drain pads

Valve Spring

CR

To the waste ink drain pads

Air Tube

Right Frame

Figure 2-15. Capping Mechanism


2.2.7.1 Wiping/CR Lock MechanismThe wiping mechanism removes ink and dust that collect around the nozzles during the cleaning sequence.When the PF motor rotates backward, torque sent via the head cleaner (wiper) drive gear and the clutch


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q ( p ) gmoves the head cleaner to the path of the printhead. Then the CR unit moves right and left to wipe thenozzle surface against the head cleaner. The forward rotation of the PF motor causes the head cleaner toleave the path. Only one head cleaner is used for both black and color printheads. The head cleaner is usedas the CR lock mechanism. When the printer power is off, it locks the CR unit off the printing side. The rightframe also locks the CR at the right end. The CR remains in the capping position while transported.

CR

Head Cleaner

Head Cleaner Lever

PrintheadPF Motor

Gear Train Pump Gear/Clutch

Wiping Mechanism

Switch Lever

Disengage Mechanism

CR

Head Cleaner Lever


2.3 Circuit Operating Principleshi i i f h f ll i i i b d


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This printer consists of the following circuit boards: C211 MAIN board C178 PSB/PSE board C211 Panel board

Printhead driver circuits (nozzle selection circuit) are directly attached to the black and color printheads.Figure 2-17 shows a block diagram of the electrical circuits.

2.3.1 C172 PSB/PSE Electrical Circuit BoardThe input voltages for the PSB/PSE board are shown in Table 2-7. Since the electrical circuit of this printer isa secondary circuit, it uses a delay timer to make the printer execute the capping operation even after theprinter is turned off. The printer uses this function to prevent ink clogging or smudging caused by an exposedprinthead.

VDC Application+42 V CR motor/PF motor

Printhead common voltage+5 V C211 Main control board (logic)

Sensors (HP sensor, PE sensor, ink cartridgesensor, DE sensor, cover open sensor)

Control panel, Nozzle head selection

The electrical circuitry of this board uses the RCC (Ringing Choke Converter) switching regulator. ACvoltage is first input to the filter circuit for higher harmonics absorption and is then input to the rectificationand smoothing circuits, where it is converted into DC voltage. The DC voltage is then input to the switchingcircuit. An FET on the primary side performs this switching operation then generates +42 voltage that isstabilized on the secondary side and then converted into a stable +5 VDC by the regulator IC.

The CPU on the C211 main board monitors the on/off power signals from the control panel. When the powerff h CPU d P Off i l (PSC) h l i l i i Th l i l b d h d l

C211 PNL

C172 PSB/PSE+5 VDC

+42 VDC C211 MAIN

M-4I60 Mechanism Unit

CR/PF Motor

CR Unit

Color PrintheadDriver Circuit

Black PrintheadDriver Circuit

Figure 2-17. Electrical Circuit Block Diagram

Table 2-7. DC Voltage Distribution

Operating Principles Figure 2-18 illustrates the electrical circuit diagram.

Primary Circuit Secondary Circuit


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The operating principles for the various protection and controller circuits shown above are described below. +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 levelexceeds 9 V, information is fed back to the primary switching circuit through the transistor (Q82) andPhoto coupler (PC1) to cut the +42 V line to the regulator (OC51).

+5 VDC line constant voltage control circuitVoltage in the +5 VDC line is controlled by the regulator IC (IC51). When abnormal voltage in the +5VDC line is detected, information is input to the internal comparator of the regulator so it controls thevoltage.

+42 VDC line over-voltage protection circuitThe output level of the +42 VDC line is monitored by 2 Zener diodes, ZD52 and ZD87. The circuitoperates as follows:

Output level of the +42 VDC line exceeds +48 V

Full WaveRectifierCircuit

Filter

Fuse

AC Input

SmoothingCircuit

SwitchingCircuit(Q1)

Half WaveRectifierCircuit

ChoppingRegulator(IC51)

+42 VLine Detector

Circuit (ZD51, 81 to 86)

+42 V Line Over CurrentProtection Circuit(Q81, Q82)

+5 VOver VoltageProtection Circuit(ZD53, Q82)

Power Off Delay Circuit(ZD88, C84, Q84)

+42 V

+5 V

Power Off Signal

Photo-couplerPC1

+42 V Line Over VoltageProtection Circuit(ZD52, ZD53, ZD87, Q82, Q83)

Figure 2-18. Power Supply Circuit Diagram

EPSON Stylus COLOR 1520 low, the transistors assume there is a short circuit and feed information to the primary circuit to stop theswitching FET operation.

2 3 2 C211 Main Control Board


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2.3.2 C211 Main Control BoardThis printer uses C211 MAIN for the main control circuit board. It consists of the following:

16-bit CPU C90A02CB (IC7) Runs at 19.66 MHz. 2 gate arrays E05B33 (IC6) Control interfaces, motors and printheads.

E05B34 (IC5) P-ROM, DRAM and MROM Drivers Produce common voltage for the motors and printheads.

Table 2-8 and Figure 2-9 show the allocated functions for major components and the main control circuitblock diagram, respectively.

IC Location Function

CPU IC7

16-bit CPU Runs at 19.66 MHz. Controls the printer at the gate arrays IC5 and

IC6 according to the program in P-ROM.

Gate Array IC5 Controls the I/F for the control panel. Controls the CR motor. Detects signals from the PE sensor, cover open

sensor, and REL (Release) sensor.Gate Array IC6 Controls the parallel I/F. Controls the serial I/F. Controls Type-B I/F. Controls the PF motor. Controls black and color printheads. Controls the HP sensor and DE sensor.

DRAM IC9 Manages buffers, the work area in the CPU, andthe stack area.

DRAM IC10

For the image buffer. Expansion.MROM IC13 24 Mbit Manages the C.G. (Character Generator).

P-ROM IC11 Only in the European version.P-ROM IC14 8Mbit

Printer control program Manages the C.G. (Character Generator).

EEPROM IC2 Stores the default settings and other values.Timer counter IC IC3 Manages ink system timers.

Common driverIC IC18

Produces common voltage for the blackprinthead.Common driver

ICIC19 Produces common voltage for the color

printhead.Driver IC16 Drives the PF motor.Driver IC17 Drives the CR motor

Table 2-8. Locations and Functions of the Major Components



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CLK

SD I/O

Data Bus

DRAM(4M) (IC10)

Address Bus

TimerCounter ICRTC-45436A(IC3)

CPUC90A02CB (IC7)

GAE05B33(IC6)

MROM(IC13)

P-ROM(8M) (IC14)

P-ROM(4M) (IC11)

MROM(IC12)

MFrom IC5

M

+42VDC

+5VDCType-BI/F

+5V

DRAM(4M) (IC9)

GAE05B34(IC5)

PSC

Power LineReset ICM51955BFP(IC4)

Logic LineReset ICRST592D(IC1)

EEPROMLE93C56(IC2)

From IC6

From IC6

+5V

+42V

+5V

PE, Cover Open,REL Sensors

HP, DE Sensors

Black/ColorControl Signals

PF MotorControl SignalParallel I/F

Serial I/F

Control PanelCR Motor Control

PrintheadTemperature

Lithium Battery

From IC6 Black/Color PrintheadCommon Driver Circuit

Nozzle Selection Signal

PF MotorDriver CircuitUDN2917EB (IC16)

Carriage

CR Motor Driver CircuitSLA7043M (IC17) CR Motor

PF Motor

NozzleSelection IC

Black Printhead128 Nozzles

Color Printhead64 Nozzles

NozzleSelection IC


2.3.2.1 Reset CircuitsThe C211 main board contains two reset circuits: the logic line (+5V) and the power (+42 V) line. Reset ICM51955BFP (IC4) monitors the +42V line When the voltage level drops below 33 2 V It outputs an /NMI


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M51955BFP (IC4) monitors the +42V line. When the voltage level drops below 33.2 V, It outputs an /NMIsignal to the CPU and the gate array to cut off the power to the motors. When the voltage level drops below42 V, Reset IC RST592D (IC1) monitors the +5 V line and sends a LOW pulse. During printer power-on, itoutputs LOW until a stabilized +5 V is produced to ensure the CPUs proper operation.

2.3.2.2 Sensor CircuitsThis printer has 9 sensors to monitor its condition.

HP Sensor (Home position sensor)The HP sensor uses the photo interrupter system. When the CR unit is at the home position, the signalgoes LOW. A HIGH signal level indicates that the CR unit is off the home position. The photo interruptsystem is highly reliable because it has no contact with any other mechanism.

PE_R sensor (Rear Paper End sensor)The PE_R sensor, attached to the rear side of the paper path, detects paper for continuous feeding or cut

sheets set in the rear side of the paper path. A mechanical switch used for this sensor opens when paperis fed and closes when no paper is detected. PE_F sensor (Front Paper End sensor)

The PE_F sensor, located in the paper guide unit, detects cut sheets in the ASF. This sensor uses amechanical switch, which opens when paper is detected, and closes when no paper is detected.

REL sensor (Release sensor)The REL sensor is built into the rear part of the left frame of the printer mechanism. It determineswhether the release lever is set to the cut sheet side (friction mode), or the continuous paper side (tractormode). A mechanical switch opens when the lever is set for friction mode and closes when the lever isset for tractor mode.

DE sensor (Disengage sensor)DE sensor built into the middle frame detects the CR position. A mechanical switch used for this sensoropens 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

RST592D(IC1)

M51955BFP

(IC4)

CPUC90A02CB

(IC7)

GAE05B33

(IC6)

GAE05B34

(IC5)

+5V

+42V

VOUT

OUT1

OUT2RESET

NMI

RES

XRESET

Figure 2-20. Reset Circuit Block Diagram


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 isinstalled. A mechanical switch used for this sensor indicates Low with a cartridge installed and goes Highwithout it. When the sensor detects no cartridge condition, it resets the ink consumption counter.


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without it. When the sensor detects no cartridge condition, it resets the ink co

Manual Técnico y PPL Stylus 1520

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