Epson Photo750 User Manual

6(59,&(#0$18$/

6(59,&(#0$18$/6(59,&(#0$18$/

Color Inkjet Printer

EPSON Stylus Photo 750

SEIJ98005

Notice

†

All rights reserved. No p art of t his manual may be reprod uced, stored i n a ret rieval syste m, or trans mit ted in any form or by any means electronic, mechanical, photocopying, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.

†

All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

†

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

†

All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

†

The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

General Notice: Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their

respective owners. EPSON disclaims any and all rights in those marks.

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.

DANGER

WARNING

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

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

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

DANGER

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

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

WARNING

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

2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/ RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

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

5. 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.

About This Manual

W ARNING

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus Photo

750. The instructions and procedures included herein are intended for the experienced repair technici ans, and attention should be given to the precautions on the preceding page.

Contents

This manual consists of six chapters and Appendix.

CHAPTER 1. PRODUCT DESCRIPTIONS

Provides a general overview and specifications of the product.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of electrical and mechanical operations of the product.

CHAPTER 3. TROUBLESHOOTING

Provides the step-by-step procedures for the troubleshooting.

CHAPTER 4. DISASSEMBLY AND ASSEMBLY

Describes the step-by-step procedures for disassembling and assembling the product.

CHAPTER 5. ADJUSTMENTS

Provides Epson-approved methods for adjustment.

CHAPTER 6. MAINTENANCE

Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing the product.

APPENDIX

Provides the following additional information for reference:

• Connector pin assignments

• Electric circuit boards components layout

• Exploded diagram

• Electrical circuit boards schematics

Symbols Used in This Manual

Various symbols are used throughout this manual either to provide additional information on a specif ic topic or to warn of possible danger present during a procedure or an action. Be aware of all symbols when they are used, and always read WARNING, CAUTION or NOTE messages.

Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, coul d result in in jury or loss of life.

CAUTION

CHECK

PO INT

Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in damage to, or destruction of, equipment.

May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.

Revision Status

Revision Issued Date Description

Rev. A December 14, 1998 First Release Rev. B July 30, 1999 Revise Page 85, 106

Stylus Photo 750 Revision A

Table of Contents

Product Description

Overview................ ....... ...... ...... ....... ...... ....... ...... ....... ..................................... 4

General Characteristics............................................................................. 4

General Description........................................................................................ 5

Printing....... ...... ............................................. ....... ...... ....... ........................ 5

Paper Feeding........................................................................................... 6

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

Printable Area................ ...... ....... ...... ....... ............................................. ..... 7

Adjust Lever Settings ................................................................................ 8

Environmental Conditions ......................................................................... 9

Ink Cartridge............................................................................................ 10

Input Data Buffer ..................................................................................... 11

Electric Specification ............................................................................... 11

Reliability................................................................................................. 11

Safety Approvals ..................................................................................... 11

Acoustic noise ......................................................................................... 11

CE Marking.............. ...... ...... ....... ............................................. ....... ...... ... 12

Printer Language and Emulation............................................................. 12

Parallel Interface.... ....... ...... ...... ....... ...... ....... ...... ....... ...... ............................. 14

Parallel Interface(Forward channel)........................................................ 14

Parallel Interface(Reverse channel)........................................................ 15

Serial Interface ........................................................................................ 18

USB(Universal Serial Bus) Interface....................................................... 19

Prevention of data transfer time-out on the host ..................................... 20

Interface selection ................................................................................... 20

IEEE 1284.4 protocol .............................................................................. 20

Function........................................................................................................ 21

Control Code ........................................................................................... 21

Bi-directional Command.......................................................................... 21

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

Special Setting Mode .............................................................................. 22

LED Indications ....................................................................................... 22

Errors....................................................................................................... 23

Initialization.............................................................................................. 24

Initialization Setting ................................................................................. 25

Physical Specification.............................................................................. 25

Consumables and options....................................................................... 26

Operating Principles

Overview ...................................................................................................... 28

Printer Mechanism .................................................................................. 28

Operating Principles of Electric Circuit......................................................... 30

C257 PSB Power Supply Circuit............................................................. 30

C259 Main Control Circuit ....................................................................... 32

Troubleshooting

Overview ...................................................................................................... 39

Unit Level Troubleshooting........................................................................... 41

Unit Repair (Power Supply Board) ............................................................... 44

Repair of the Control Board.......................................................................... 45

Unit Repair (Printer Mechanism).................................................................. 47

Disassembly and Assembly

Overview ...................................................................................................... 51

Precautions ............................................................................................. 51

Tools ....................................................................................................... 51

Work Completion Check ......................................................................... 52

Disassembly................................................................................................. 53

Housing Removal..... ....... ............................................. ...... ....... ...... ........ 54

Circuit Boards Removal .......................................................................... 55

Control Panel Removal ........................................................................... 57

Absorber Tray, Assembly;A Removal ..................................................... 58

Printer Mechanism Removal ................................................................... 59

Adjustment

Overview ...................................................................................................... 77

Required Adjustment............................................................................... 77

Adjustment ................................................................................................... 78

Stylus Photo 750 Revision A

Paper Gap Adjustment............................................................................ 78

Adjustment by Adjustment Program...... ....... ...... ....... ...... ............................. 80

Adjustment Program...... ...... .............................................. ...... ....... ...... ... 80

Setting Destination Information............................................................... 82

Head Voltage ID Adjustment................................................................... 83

Head Angular Adjustment ....................................................................... 84

Bi-D Adjustment ...................................................................................... 86

Head Cleaning......................................................................................... 87

Initial Ink Charge .................................................................................... 88

Counter Value for Ink Absorber............................................................... 89

Maintenance

Overview....................................................................................................... 91

Cleaning.................................................................................................. 91

Service Maintenance........... ....... ...... ....... ...... ....... ................................... 91

Lubrication............................................................................................... 92

Appendix

Connector Summary..................................................................................... 97

Major Component Unit ............................................................................ 97

Component Layout ..................................................................................... 100

Exploded Diagram...................................................................................... 102

Electric Circuit............................................................................................. 105

PRODUCT DESCRIPTION

&+$37(5

EPSON Stylus Photo 750 Revision A

1.1 Overview

This printer has better mechanism for the print quality and paper feeding than that of Stylus Photo and Stylus Photo 700. It also uses new print head and improved printing speed and through put.

1.1.1 General Characteristics

Major features of this printer are as follows;

†

High quality color printing

„

Bi-directional printing at the resolution of 720 dpi.

„

1440 (H) x 720 (V) dpi printing

„

Photo-MACH technology (6 color printing. CMYKcm)

„

Super micro dot, Super micro weave printing

†

Built-in auto sheet feeder

„

Holds 100 cut-sheet (55g/m

„

Holds 10 envelopes

„

Holds 10 transparency films

„

Holds 65 sheets of special paper

†

Built-in 3 I/Fs

„

Bi-directional parallel I/F (IEEE-1284 level 1 device)

„

Mac serial I/F(up to approx.1.8Mbps)

„

USB I/F

†

Windows/Macintosh exclusive

)

Figure 1-1. Exterior View of Stylus Photo 750

Product Description Overview 4

EPSON Stylus Photo 750 Revision A

1.2 General Description

1.2.1 Printing

PRINTING METHOD

†

On demand ink jet

NOZZLE CONFIGURATION

†

48 nozzles x 6 (Black, Cyan, Magenta, Yellow, Light Cyan, Light Magenta)

#48

PRINTING SPEED AND PRINTABLE COLUMNS

†

Character mode

Table 1-1. Printing Speed

Character Pitch Printable columns LQ speed

10 CPI (Pica) 80 200CPS**

** This value is the speed of one print-pass in whic h the 1/3 of char acter matrix is printed.

†

Raster graphics mode

Table 1-2. Raster Graphics Mode

Horizontal resolution

180 dpi 8.26 inch 1488 20 IPS 360 dpi 8.26 inch 2976 20 IPS 720 dpi 8.26 inch 5952 20 IPS

(3 /3 6 0 ")

0.212 m m

Printable area Available dot CR Speed

CONTROL CODE

†

ESC/P Raster

†

Bk C yan LC M LM

Figure 1-2. Nozzle Configuration

PRINTING DIRECTION

†

Bi-direction with logic seeking

Y sp02

EPSON Remote command

CHARACTER TABLES

†

2 international character sets

„

PC437 (US, Standard Europe)

„

PC850 (Multilingual)

Product Description General Description 5

EPSON Stylus Photo 750 Revision A

„

TYPEFACE

†

Bin map LQ font: EPSON Courier, 10 CPI

1.2.2 Paper Feeding

†

Feeding Method: Friction feed with ASF

†

Paper Path: Cut-sheet ASF(Top entry)

†

Feeding Speed: 2.36 inches/sec (normal speed mode/continuo us

†

Thickness: 0.08mm(0.003”)-0.11mm(0.004”)

„

Weight: 64g/m

„

Quality: Exclusive paper, Bond paper, PPC

(17lb.) - 90g/m2(24lb)

Transparency and Glossy Paper

„

Size: A4(Width 210mm(8.3”) x Length 297mm(11.7”)

Letter(Width 216 mm(8.5”) x Length 279mm(11.0”)

„

Thickness: 0.075mm(0.003”) - 0.085mm(0.0033”)

feeding)

Note)

4.5 inches/sec (high-speed mode/continuous feeding)

1.2.3 Paper Specification

This section describes the printable are a and types of paper which can be used in this printer.

†

Transparency printing is only avai labl e at normal temp erature.

Envelope

„

Size: No.10 Width 241mm(9 1/2”) x Length 104.8mm(4 1/8”)

DL Width 220mm(8.7”) x Length 110mm(4.3”) C6 Width 162mm(6.4”) x Length 114mm(4.5”)

„

Thickness:0.16mm(0.006”) - 0.52 mm(0.02”)

CAUTION

„

No curled, wrinkled, scuffing or torn paper be used.

„

Printing should be performed at room temperature

„

Weight: 45g/m

„

Quality: Bond paper, Plain paper, Air mail

(12lb) - 75g/m2(20lb.)

for transparency and envelope.

Note)

Envelope printing is only available at normal temperature.

Keep the longer side of the envelope horizontally at setting.

†

Cut Sheet

„

Size: A4(Width 210mm(8.3”) x Length 297mm(11.7”))

Letter(Width 216mm(8.5”) x Length 279mm(11.0”)) Legal(Width 216mm(8.5”) x Length 356 mm(14.0”)) Statement (Width 139.7mm(5.5”) x Length 215.9mm (8.5”)) B5(Width 182mm(7.2”) x Length 257 mm(10.1”)) Executive(Width 184.2 mm(7.25”) x Length 266.7mm

(10.5”))

†

Index Card

„

Size: A6 Index Card: Width 105mm(4.1”) x Length

148mm(5.8”) A5 Index Card: Width 148mm(5.8”) x Length 210mm (8.3”) 5x8” Index Card: Width 127mm(5.0”) x Length 203mm (8.0”) 10x8” Index Card: Width 127mm(5.0”) x Length 203 mm (8.0”)

Photo Paper (Width 101.6mm(4”) x Length 152.4mm(6 ”))

„

Thickness: Less than 0.23mm(0.0091”)

Product Description General Description 6

EPSON Stylus Photo 750 Revision A

1.2.4 Printable Area

†

Cut Sheet

Table 1-3. Printable Area

The figure below shows printable area.

Printable area

Paper Size

Letter

Legal

Statement

Executive

Photo Paper

Paper Width

(typ)

210mm

(8.3”)

216mm

(8.5”)

216mm

(8.5”)

139.7mm (8.5”)

182mm

(7.2”)

184.2mm

(7.25””)

101.6mm

(4”)

Paper

Length

(typ.)

297mm

(11.7”)

279mm

(11.0”)

356mm

(14.0”)

215.9mm (8.5”)

275mm

(10.1”)

266.7mm

(10.5”)

152.4mm

(6”)

Left

Margin

(min.)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

Right

Margin

(min.)

3mm

(0.12”)

9mm

(0.35”)

9mm

(0.35”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

Top

Margin

(min.)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

3mm

(0.12”)

Bottom

Margin

(min.)

14mm(0.54”)

/3mm

(0.12”)*

14mm(0.54”)

/3mm

(0.12”)*

14mm(0.54”)

/3mm

(0.12”)*

14mm(0.54”)

/3mm

(0.12”)*

14mm(0.54”)

/3mm

(0.12”)*

14mm(0.54”)

/3mm

(0.12”)*

14mm(0.54”)

/3mm

(0.12”)*

Note)

Bottom margin can be set up to 3mm at minimum when t he paper

length is designated with “ESC(S” command.)However, th ere is the

Figure 1-3. Printable Area

possibility that a printing scramb les in the area ranging from 3mm to 14mm, from the form lower end. When the paper length is not designated, the bottom margin must be wider than 14 mm.

Product Description General Description 7

EPSON Stylus Photo 750 Revision A

†

Envelope

1.2.5 Adjust Lever Settings

Table 1-4. Envelope

LM(Left

Paper Size

#10 28mm(1.10”) 3mm(0.12”) 3mm(0.12”) 14mm(0.55”)

DL 7mm(0.28”) 3mm(0.12”) 3mm(0.12”) 14mm(0.55”) C6 3mm(0.12”) 3mm(0.12”) 3mm(0.12”) 14mm(0.55”)

margin)

(min.)

RM(RIght

margin)

(min.)

TM(Top margin)

(min.)

BM(Bottom

margin)

Printable Area

(min.)

The adjust lever located under the printer cover(right side) needs to be set for the proper paper setting according to the paper type.

Table 1-5. Setting Position of Adjust Lever

Paper Lever position Adjustment Value

Normal paper,

Transparency

sheet, Label

Envelope 0 0mm

+ +0.9mm

Paper Adjsut Lever

Figure 1-4. Printable Area

Figure 1-5. Adjust Lever

Product Description General Description 8

EPSON Stylus Photo 750 Revision A

(

)

†

1.2.6 Environmental Conditions

Resistance to shock:

†

Temperature:

„

Operating: 10 to 35

„

Non-operating: -20 to 60

NOTE:1 month at 40

†

Humidity:

„

Operating: 20 to 80% RH(*2,*3)

„

Non-operating: 5 to 85% RH(*1,*2)

Hum idity (% R H )

C(*3)

C(*1)

and 120 hours at 60

G uranteed R ange

„

Operating: 1G, within 1ms

„

Non-operating: 2G, within 2ms(*1)

†

Resistance to vibration:

„

Operating: 0.15G

„

Non-operating: 0.50G (*1)

NOTE:*1:with shipment container

*2:without condensation *3:Refer to Figure1-6 for Environmental Condition.

50 F

(80 F)

(95 F)

Tem perature

( F )

Figure 1-6. Environmental Condition

Product Description General Description 9

EPSON Stylus Photo 750 Revision A

Yellow

Light M agenta

M agenta(M )

(L M )

(Y )

Light C yan(LC )

Cyan

(C )

1.2.7 Ink Cartridge

1.2.7.1 Black Ink Cartridge

†

Type: Exclusive cartridge

†

Color: Black

†

Print capacity: 540 pages/A4 (ISO/IEC1056 1 Letter Pattern at 360

dpi)

†

Ink life: 2 years from production date

†

Storage temperature:-20

†

Dimension: 19.8mm(W) x 52.7 mm (D)x 38.5mm(H)

C to 40°C(Storage within a month at 40°C)

-30 at 40

-30

C to 40°C(Packing storage, within a month

C to 60°C(Transit, within 120 hours at 60°C

and within a month at 40

1.2.7.2 Color Ink Cartridge

†

Type: Exclusive cartridge

†

Color: Magenta, Cyan, Yellow, Light Magenta, Light Cyan

†

Print capacity: 220 pages/A4 (360 dpi, 5% duty each color)

†

Ink life: 2 years from production date

†

Storage temperature:-20

†

Dimension: 51.4mm(W) x 52.7 mm (D)x 38.5mm(H)

NOTE:Ink cartridge can not be re-filled, only ink cartridge is

prepared for article of consumption.Do not use the ink cartridge which was passed away the ink life. Ink will be frozen under - 4

be usable again being placed at room temperature for 3 hours.

C to 40°C(Storage within a month at 40°C)

-30 at 40

-30

C to 40°C(Packing storage, within a month

C to 60°C(Transit, within 120 hours at 60°C

and within a month at 40

C environment. However, it will

Product Description General Description 10

Figure 1-7. Black Ink Cartridge

Figure 1-8. Color Ink Cartridge

EPSON Stylus Photo 750 Revision A

„

1.2.8 Input Data Buffer

†

Buffer: 256 Kbytes

1.2.9 Electric Specification

†

120V version

Insulation Resistance:10 M ohms min. (between AC line and

chassis, DC 500V)

„

Dielectric: AC 1500 V rms. 1 minute (between AC

line and chassis)

1.2.10 Reliability

„

Rated voltage: AC 120V

„

Input voltage range: AC 99 -132V

„

Rated frequency range:50 - 60Hz

†

Total print volume: 10,000 pages(A4, Letter)

†

Print Head Life: 2000 million dots/nozzle

„

Input frequency range:49.5-60.5 Hz

„

Rated current: 0.4A(Max.0.5A)

„

Power consumption: Approx.18W(ISO/IEC 10561 Letter

„

Insulation Resistance:10 M ohms min. (between AC line and

„

Dielectric: AC 1000 V rms. 1 minute or

†

220-240V version

„

Rated voltage: AC220-240V

„

Input voltage range: AC 198 -264V

„

Rated frequency range: 50 - 60Hz

„

Input frequency range:49.5-60.5 Hz

„

Rated current: 0.2A(Max.0.3A)

pattern) Energy Star compliant

chassis, DC 500V)

AC 1200 V rms 1 second(between AC line and chassis)

1.2.11 Safety Approvals

†

120V version

„

Safety standard: UL1950 with D3

CSA22.2 No.950 with D3

„

EMI: FCC part 15 subpart B classB

CSA C108.8 class B

†

220-240V version

„

Safety standard: EN60950(VDE, NEMKO)

EN55022(CISPR Pub.22) class B AS/NZS 3548 class B

1.2.12 Acoustic noise

†

Level: Approx. 47 dB(A) (According to ISO 7779)

„

Power consumption: Approx.18W(ISO/IEC 10561 Letter

pattern) Energy Star compliat

Product Description General Description 11

EPSON Stylus Photo 750 Revision A

1.2.13 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

1.2.14 Printer Language and Emulation

†

Printer Language: ESC/P Raster

EPSON Remote

1.2.14.1 ESC/P Control Codes

< Character mode >

†

General operation:

„

Initialize printer: ESC@

†

Paper feeding:

„

Form Feed FF

„

Line Feed LF

„

Carriage Return CR

< Graphic Mode >

†

General operation:

„

Initialize Printer: ESC @

„

Unidentical Printing: ESC U

„

Print a Image: ESC ACK

„

CSF Mode Control: ESC EM

†

Paper Feeding:

„

Form Feed: FF

„

Line Feed: LF

„

Line Spacing: ESC+

„

Carriage Return: CR

†

Page format

„

Page Length: ESC (C

„

Top/Bottom Margin: ESC (c

„

Paper Size: ESC (S

†

Print position mo tio n

„

Horizontal Print Position: ESC $, ESC\, ESC($, ESC(\

„

Vertical Print Position:ESC(V, ESC(v

†

Spacing:

„

Graphics Mode: ESC (G

†

Graphics:

„

Raster Graphics: ESC.

„

Microweave control: ESC (i

Product Description General Description 12

EPSON Stylus Photo 750 Revision A

„

Dot size control: ESC (e

„

Raster header: ESC (D

„

Raster body: ESC i

†

Color:

„

Printing Color: ESC r, ESC (r

†

EEPROM control:

„

EEPROM control: ESC

Product Description General Description 13

EPSON Stylus Photo 750 Revision A

1.3 Parallel Interface

This printer has IEEE-1284 parallel inte rface, RS-423 serial interface and USB interface as standard.

1.3.1 Parallel Interface(Forward channel)

Forward channel is the mode to transfer the ordinary printing order to the printer side from the PC side.

Table 1-6. Parallel I/F

Item Specification

Transmission mode 8bit parallel, IEEE-1284 compatibility mode

Synchronization By STROBE pulse

Handshaking By BUSY and ACKNLG signal

Signal Level TTL compatible level

Adaptable connector 57-30360(amphenol) or equivalent

BUSY signal is set high before setting either-ERROR low or PE high and is held high until all these signals return to their inactive state.

BUSY signal is set high level in the following cases.

-During data entry (see Data transmission timing)

-When input data buffer is full

-During -INIT signal is at low level or during hardware initialization

-During printer error (See-ERROR signal)

-When the parallel interface is not select ed.

ERROR signal is at low level when the printer is in one of the following states.

-Printer hardware error (fatal error)

-Paper-out error

-Paper jam error

-Ink-out error

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

Table 1-7. Connector pin assignment and signals

Pin.

1 -STROBE 19 In

2-9 Data0-7 20-27 In

10 -ACKNLG 28 Out

11 BUSY 29 Out

12 PE 28 Out A high signal indicates paper-out error.

13 SLCT 28 Out

14 -AFXT 30 In Not used.

31 -INIT 30 In

Signal

Name

Return

GND pin

In/Out Function Description

The strobe pulse. Read-in of data is

performed at the falling edge of this

pulse.

The DATA 0 through DATA7 signals

represent data bits 0-7,

respectively.Eacj signal is at high when

data is logical 1 and low level when data

is logical 0.

This signal is a negative pulse incl udi ng

that the printer can gain accept data.

A high signal indicates that the printer

cannot receive data.

Always at high level when the printer is

powered on.

This falling edge of a negat ive puls e or a

low signal on this li ne caus es the p rinter

to initialize Minimum 50 us pulse is

necessary.

32 -ERROR 29 Out

36 -SLIN 30 In Not used.

A low signal indicates printer error

condition.

Product Description Parallel Interface 14

EPSON Stylus Photo 750 Revision A

Pin.

18 Logic H --- Out Pulled up to +5V via 3.9K ohm resistor. 35 +5V --- Out Pulled up to +5V via 3.3 K ohm resistor.

16,33 19-30

15,34 NC --- --- Not connected.

Signal

Name

Chassis

GND

GND --- --- Signal GND.

Return

GND pin

--- --- Chassis GND.

In/Out Function Description

NOTE:In/Out refers to the direction of signal flow from the printer’s

point of view.

1.3.2 Parallel Interface(Reverse channel)

Reverse channel is used to transfer the in formation data from the pri nter side to the PC side.

Table 1-8. Connector pin assignment and signals

Item Specification

Transmission mode IEEE-1284 nibble mode

Synchronization Refer to the IEEE-1284 specification

Handshaking Refer to the IEEE-1284 specification

Data trans.timing Refer to the IEEE-1284 specification

Signal Level TTL compatible level

Adaptable connector 57-30360(amphenol) or equivalent

†

Extensibility request: The printer responds affirmatively when the extensibility request values are 00H or 04H, that me an, 00H: Request Nibble Mode Reverse Channel Transfer. 04H: Request Device ID;

Return Data Using Nibble Mode Rev Channel Transfer

†

Device ID: The printer sends following device ID string when it is requested.

„

When IEEE1284.4 protocol is effective: [00H] [57H] MFG:EPSON; CMD:ESCPL2,BDC,D4; MDL:Stylus[SP]Photo[SP]750; CLS:PRINTER; DES:EPSON[SP]Stylus[SP]Photo[SP]750;

Product Description Parallel Interface 15

EPSON Stylus Photo 750 Revision A

„

When IEEE1284.4 protocol is NOT effective: [00H] [57H] MFG:EPSON; CMD:ESCPL2,BDC; MDL:Stylus[SP]Photo[SP]750; CLS:PRINTER; DES:EPSON[SP]Stylus[SP]Photo[SP]750;

NOTE:[00H] denotes a hexadecimal value of zero.

[SP] denotes a space character(20H). MDL and DES values depend on the EEPROM setting.

Pin.

1 HostClk 19 In Host clock signal.

2-9 Data0-7 20-27 In

10 PtrClk 28 Out Printer clock signal.

Table 1-9. Connect pin assignment and signals

Signal

Name

Return

GND pin

In/Out Function Description

The DATA 0 through DATA7 signals

represent data bits 0-7,

respectively.Eacj signal is at high level

when data is logical 1 and low level

when data is logical 0. These signals are

used to transfer the 1284 extensibility

request values to the printer.

14 HostBusy 30 In Host busy signal . 31 -INIT 30 In Not used.

36 1284-Active 30 In 1284 active signal. 18 Logic H --- Out Pulled up to +5V via 3.9K ohm resistor. 35 +5V --- Out Pulled up to +5V via 3.3 K ohm resistor.

16,33 19-30

15,34 NC --- --- Not connected.

PtrBusy/

DataBit-3,7

AckDataReq/

DataBit-2,6

Xflag/

DataBit-0,4

-DataAvail/ DataBit-0,4

Chassis

GND

GND --- --- Signal GND.

29 Out

28 Out

29 Out

-- -- Chassis GND.

Printer busy signal and revers e chann el

transfer data bit3 or 7.

Acknowledge data request signal and

reverse channel transfer data bit2 or 6.

X-flag signal and reverse channel

transfer data bit 1 or 5.

Data available signal and reverse

channel transfer data bit 0 or 4.

Product Description Parallel Interface 16

EPSON Stylus Photo 750 Revision A

NOTE:Following lists “Notes” when using the parallel interface.

1. “Return GND pin” in the table means twist pair return and is connected to the signal GND level. Also, these cables are shielded wires and it is effective means to connect to each chassis GND in the PC and printer for electrostatic noise.

2.Conditions for interface are based on TTL level. Rise and fall time should be within 0.2

3.Refer to figure1-9 for transmission of timing of each signals.

4.Do not perform data transmission ignoring -ACK or BUSY signals. (Perform the data transmission after confirming that -ACK and BUSY signals are Low)

5.It is possible to perform the printing test including interface circuit without using equipment from outside when 8-bit data signal(20-27 pin) is set to appropriate word code and connect then force fully to -ACK and

-STRB. However, to perform this, it is necessary to set “Parallel I/F mode” of EEPROM as normal. Also, set the IEEE-1284.4 packet mode Off.

The figure below shows the timing chart of the parallel interface.

DATA

/S T R B

BUSY

/A C K

d a ta b y te n

hold

setup

re a d ytbusy

tt-out M ax. 120 ns : R ise and fall tim e of every output signals tt-in M ax. 200 ns : R ise and fall tim e of everu input signals

stb

re p ly

acktnbusy

data byte n+1

Figure 1-9. Timing Chart

Typical time of tack is shown below.

Table 1-10. Typical Time of Tack

Parallel I/F Mode Typical time of tack

High speed 0.5

Normal speed 2 µS

Product Description Parallel Interface 17

EPSON Stylus Photo 750 Revision A

345

678

1.3.3 Serial Interface

This section shows specification for serial interface I/F.

Table 1-11. Serial interface

Item Specification

Standard Based on RS-423

Synchronization Synchronous

Bit rate Approx. 1.8Mbps

• Start bit 1bit

Word format

Handshaking X-ON/X-OFF, DTR protocol

Adaptable connector 8-pin mini circular connector

Recommended interface cable Apple System Peripheral-8 cable

Table 1-12. Connector pin assignment and signals

Pin No.

Signal

Name

In/Out Function Description

• Data bit 8bit

• Parity bit none

• stop bit 1bit

Following figure shows port arrangement of serial I/F connector.

Figure 1-10. Serial I/F Connector Port

Following table shows timing relation of DTR, X-ON/X-OFF handshaking.

1 SCLK Out Synchronous clock 2 CTS In Clear to send 3 TxD- Out Transmitt data4 S.G. In Signal ground 5 RxD- In Receive data6 TxD+ Out Balanced Transmit+ 7 DTR Out Data terminal ready 8 RxD+ In Bal anced Receive+

NOTE:In/Out refers to the direction of signal flow from the printer’s

State Buffer space X-on/X-off DTR

Busy

Ready

Table 1-13. X-ON/X-OFF, DTR protocol

Less than 3072

bytes

More than 5120

bytes

Send X-OFF code Off

Send X-ON code On

point of view.

Product Description Parallel Interface 18

EPSON Stylus Photo 750 Revision A

Pin 1

Pin 2

Pin 3

Pin 4

1.3.4 USB(Universal Serial Bus) Interface

Following shows specification.

†

Standard: Based on

„

Universal Serial Bus Specifications Revision 1.0

„

Universal Serial Bus Device Class Defi nition for Printin g Devices version 1.0

†

Bit rate: 12Mbyte(Full Speed Device)

†

Data encording: NRZI

†

Adaptable connector: USB Series B

†

Recommended cable length: 2 meters

Table 1-14. Connector pin assignment and signals

Pin.

1VCC --

2 -Data

3+Data

4 Ground -- Cable ground.

Signal Name I/Out Function Description

Cable power. Maximum power

consumption is 100mA.

Bi-

directional

Bi-

directional

Data. Pull up to +3.3V via 1.5K ohm

Data

resistor.

Figure 1-11. USB Interface Port

Product Description Parallel Interface 19

EPSON Stylus Photo 750 Revision A

1.3.5 Prevention of data transfer time-out on the host

Generally, hosts abandon data t ransfer to periph erals when a peripheral is in busy state for dozens of seconds continuously. To prevent hosts from acting this kind of time-out, the printer receives data very slowly, several bytes per minute, even if the printer is in busy state. This slowdown starts when the remaining input buffer is less than several hundreds of bytes. Finally , the pri nter is i n busy state cont inuously when the input buffer is full.

1.3.6 Interface selection

The printer has 3 built-in interf aces; Par al lel I/F, Mac seri al I/ F and USB I/F. These interfaces are selected automati cally.

„

Automatic selection In this automatic interface selecti on mode, the printer is initialized to the idle state scanning which interface receives data when it is powered on. Then the interface that receives data first is selected. When the host stops data transf e r and the printer is in the stand-by state for the second s, the printer is returned to the idle state. As long as the host sends data or the printer interface i s bus y stat e, the s ele cted in ter face i s let as i t is .

„

Interface state and interface selection When the parallel interface is not selected, the int erface got 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 got into the ready state, 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 interf ace is not selected.

1.3.7 IEEE 1284.4 protocol

The packet protocol described by IEEE1284. 4 is supported on the parallel I/F and USB I/F. Three function modes of IEEE1284.4 protocol, “On”, “Off” and “Auto” are available for each I/F, and one of them is selected according to the value in EEPROM address 0Ah and 0Ch.

On: Communication in IEEE1284.4 packet mode is started by

receiving a magic string(1284.4 synchro nous commands). Until a magic string is received, other commdands are discarded.

Off: Communication is carried out in the conventional mode. A

magnetic string(1284.4 synchron ous commands) is discarded.

Auto: Communication is carried out in the conventional mode until a

magic string(1284.4 synchronous commands) is received . By receiving a magic string, communication in IEEE1284.4 packet mode is started.

NOTE:The packet protocol of IEEE1284.4 allows a device to carry

on multiple exchanges or conversations which contain data and /or control information with another device at the same time across a single point to point link. The protocol is not , however, a device control language. It does provide basic transport-level flow control and multiplexing services. The multiplexed logical channels are independent of each other and blocking of one has no effec t on the othe rs. The protocol operate over IEEE1284.

Product Description Parallel Interface 20

EPSON Stylus Photo 750 Revision A

1.4 Function

1.4.1 Control Code

This printer is operated with the raster graphi cs control code based on the ESC/P2 control line. Refer to “ESC/PV2 Reference Manual” and “ESC/P2 specification” for each command and ESC sequence.

1.4.2 Bi-directional Command

†

Remote Setting Command Refer to “Remote Command Specification” for details.

1.4.3 Control Panel

There are 2 non-lock type push swit ches, 1 l ock t ype push swi tch and 4 LEDs. The figure below shows the exterior view of the control panel.

Power LED :Green

Paper out LE D:R ed

Ink O u t (B lack)LED :R ed

Power SW

In k O u t (C o lo r) L E D : R e d

C leaning S W

Figure 1-12. Control Panel

Load/E ject SW

1.4.3.1 Switches

Since this printer does not have so many switches, each button has several functions. The tables below show their functions and how to enter those functions for each switch.

Table 1-15. Panel functions in normal state

Switch Function

Load/Eject

(Less than 2

seconds)

Load/Eject

(for 2 seconds)

Cleaning

(for 2 seconds)

Cleaning

(Less than 2

seconds)

Table 1-16. Panel function with turning on

Switch to press when

turning on

Load/Eject

Cleaning

Load/Eject +

Cleaning

NOTE:*1: Refer to Table 1-17, “Status printing,” on page 22.

*2:Not described in the User’s manual. (not open to the users) *3:See the Table in the section “Special Sett ing Mode”.

• Load or eject paper

• When the carriage is on the position for exchanging ink cartridge, return it to the home position.

• Start the ink cartridge exchange sequence; i.e. move the carriage to carriage exchange position.

• Start cleaning the print head.

• In the condition of “Ink Low” or “No Ink Cartridge”, start the ink cartridge exchange sequence.

• When the carriage is on the position for exchanging ink cartridge, return it to the home position.

Function

• Start status-printing.*

• Change code pages/Select IEEE1284.4 mode for parallel I/F*

• Start special setting mode.*

Product Description Function 21

EPSON Stylus Photo 750 Revision A

*1(from the previous page): According to the content of 35H of EEPROM, one of the following actions is carried out.

Table 1-17. Status printing

Content of 35H of EEPROM,

[bit7] [bit6]

00 11 01 10

• Print firmware version, ink counter, selected code page and nozzle check pattern

• Start hex-dump printing.

• Start self test printing.

Action

1.4.4 Special Setting Mode

„

CAUTION

After turning the power on while pressing Load/Eject and “Cleaning” switches, “Paper Out” indicator blinks for 3 seconds. By pressing the following switches during this period, f ollowing action is carried out.

Unlike the previous models, since this printer does not have EEPROM All Clear function, do not perform this operation except for the purpose of cancelin g the maintenance errors.

„

Be sure to replace the waste ink pad located in the lower case, when canceling the maintenance error.

„

If you replace the waste ink pad regardless of the maintenance error, be sure to perform this operation.

NOTE:*Waste ink counter value and Timer IC counter value are

initialized.

1.4.5 LED Indications

There are 4 LEDs in this printer.

1. Power Lights when the operate switch is “ON”, and AC power is supplied.

2. Paper Out Lights during the paper-out condition, and blinks during the paperjam condition.

3. Ink Out(Black) Lights during no Black ink condition, and blinks during the Black ink low condition.

4. Ink Out (Color) Lights during no Color ink condition, and blinks during the Color ink low condition.

See the table on the next page for more det ailed LED indicati ons. Since LED indicates the various errors and current printer operations, LED indications enable to find out the proper repair operation.

Table 1-18. Special setting mode

Switch Function

Load/Eject

Cleaning

(for 10 seconds)

• Initialize EEPROM* and reset time IC.

• Reset the ink overflow counter in EEPROM.

Product Description Function 22

EPSON Stylus Photo 750 Revision A

CAUTION

Table 1-19. Printer Status displayed on the control panel

Indicators

Printer Status

Power on condition On -- -- -- 9

Ink sequence Blink -- -- -- 6

Ink cartridge

exchange mode Data processing Blink -- -- -- 8

Paper out

Paper jam

No ink cartridge or

Ink out (black)

Ink level low (black) -- Blink -- -- 7

No ink cartridge or

Ink out (color)

Ink level low (color) -- -- Blink -- 7

EEPROM and

Timer IC reset

Maintenance

Request

Fatal Error

Power

Blink------5

-- -- -- On 4

-- Off Off Blink 3

-- On -- -- 7

-- -- On -- 7

Blink Blink Blink Blink 2

Blink On On Blink 1

Ink Out (Black)

(for 1

second)

Ink Out

(Color)

(for 1

second)

Paper Out Priority

(for 1

second)

NOTE:*1 Refer to “Fatal Error” under the “Errors” on page -23.

*2 EEPROM reset does not mean to erase all address in EEPROM. (See “Special Setting Mode” on page -22) *3 -- in the table above means no change.

1.4.6 Errors

In this printer, when the following conditions are detected. the printer goes to the error condition, sets ERROR signal Low and BUSY signal High and stops receiving the data. The printer becomes unable to print at this time. However, if the printer communicated by IEEE1284.4 protocol, the printer does not become unprintable state.

†

Ink Out When the printer runs out most of the ink of any one color, it indicates ink-low warning and keeps printing. When the print runs out the whole ink of any one color, it indicates ink-error and stops printing. Exchanging ink cartridges is required on this state. An ink cartridge taken out once s hould not be used agai n. Re-install ation of the cartridge upsets the i nk level d etection and may cause a serious problem to the print head as a result.

Never use or re-install the cartridge, whi ch is taken out once. Re-installation of the used cartridge disturbs the normal ink out detection.

†

Paper out When the printer fails to load a sheet, it becomes “paper out error” condition.

†

Paper Jam When the printer fails to eject a sheet, it becomes “paper jam error” condition.

Product Description Function 23

EPSON Stylus Photo 750 Revision A

†

No Ink Cartridge When the printer detects that ink-cartridge comes off, it becomes “No ink cartridge error” condition .

„

CAUTION

†

Maintenance request When the total quantity of ink wasted with cleaning and flushing reaches the limit, the printer indicates this error and stops printing. The absorber in the printer enclosu re should be replaced with a new one by a service person. The counter is added by poi nts and it s limit is as follows.

When you need to perform test print after t he repair service, performing the status-printi ng(see “Control Panel” on page -21) provides the discharged ink condition from the all ink nozzles and the current value of the waste ink counter. Be sure to check that the counter value still has enough capacity.(if the value is closer to 2700 or not)

„

If there is no enough capacity, exchange the waste ink absorber and find out if it is necessary to reset EEPROM or not. If you need to reset EEPROM, refer to “Special Setting Mode” on page -22.

1.4.7 Initialization

There are 3 types of initialization.

†

Power-on Initialization This printer initia lizes itself when it is turned on, or when it recognizes the cold-reset command (remote RS command). On this initialization, following actions are performed.

„

Initialize mechanical components

„

Clear the input buffer

„

Clear the print buffer

„

Set default values

†

Operator initialization This printer initia lizes itself when it is turned off and is turne d on again within 10 seconds, or when it recognizes the -INIT signal(negative pulse) on parallel interface. On this initialization, following actions are performed.

„

Cap the print head

„

Eject paper

„

37000 point = Approx. 418ml

†

Fatal Errors When the printer detects a problem with controlling the mechanical components or assessing the CG, it becomes “fatal error” condition.

„

Control Error Defective parallel adjustment , defective HP detecti on, scarcity of lubrication on the carriage shaft etc.

„

Logic operation error Shorted circuit, etc.

†

Clear the input buffer

„

Clear the print buffer

„

Set default values

Software initializat io n “ESC@” command also initializes the printer. On this initialization, following actions are performed.

„

Clear the print buffer

„

Set default values

Product Description Function 24

EPSON Stylus Photo 750 Revision A

429

291.97

608.74

167.1

260.9

1.4.8 Initialization Setting

This printer initializes following settings as ini tiali zation sett ing when the initialization is performed. Also, among the items of panel setting, default setting and remote command settings, the items which can be stored are also initialized as initialization setting.

†

Page position: Page heading location as present paper location

†

Line spacing: 1/6 inch

†

Right margin position: 80 lines

†

Left margin position: first line

†

Character pitch: 10 CPI

†

Printing mode:Text mode (Not raster graphics mode)

1.4.9 Physical Specification

†

Weight: 5.2Kg

†

Dimensions: 429 mm(W) x 260.9 mm(D) x 167.1 mm (H) (without sheet support)

Figure 1-13. Dimension of Stylus Photo 750

Product Description Function 25

+ 84 hidden pages