OKI ML5720, ML5721, ML5790, ML5791 Technical Reference Guide

ML5720/ML5721/ML5790/ML5791

Technical Reference Guide

REFACE

Every effort has been made to ensure that the information in this document is complete, accurate, and up-to-date. The manufacturer assumes no responsibility for the results of errors beyond its control. The manufacturer also cannot guarantee that changes in software and equipment made by other manufacturers and referred to in this guide will not affect the applicability of the inform a t ion in i t. Mention of software products manufactured by other companies does not necessarily constitute endorsement by the manufacturer.

While all reasonable efforts have been made to make this document as accurate and helpful as possible, we make no warranty of any kind, expressed or implied, as t o the accuracy or completeness of the information contained herein.

The most up-to-date drivers and manuals are available from the web site:

http://www.okiprintingsolutions.com

07118001 Iss.01 Copyright © 2011 Oki Europe Ltd. All rights reserved. Oki is a registered trademark of Oki Electric Industry Company, Ltd. Oki Printing Solutions is a tr a d emark of Oki Data Corporation. Energy Star is a trademark of the United States Environmental Protection Agency. Microsoft, MS-DOS and Windows are registered trademarks of Microsoft Corporation. Apple, Macintosh, Mac and Mac OS are registered trademarks of Apple Inc. Other product names and brand names are registered trademarks or trademarks of their

proprietors.

As an ENERGY STAR Program Participant, the manufacturer has determined that this product meets the ENERGY STAR guidelines for energy efficiency.

This product complies with the requirements of the Council Directives 2004/ 108/EC (EMC), 2006/95/EC (LVD) and 2009/125/EC (ErP) as amended where applicable on the approximation of the laws of the member states relating to electromagnetic compatibility, low voltage and energy related product.

This product complies with EN55022 Class B. However, when fitted with the optional network interface card or optional cut-sheet feeder, compliance to EN55022 is Class A. In a domestic environment this configuration may cause radio interference, in which case the user may be required to take adequate control measures.

The following cables were used to evaluate this product to achieve EMC directive 2004/108/EC compliance and configurations other than this may affect that compliance.

CABLE TYPE LENGTH

(METRE)

Power 1.8 USB 5.0 Serial 2.1 Parallel 2.0

CORE SHIELD

✘✘

✘ ✔

LAN 5.0

✘✘

Preface > 2

ANUFACTURER

Oki Data Corporation, 4-11-22 Shibaura, Minato-ku, Tokyo 108-8551, Japan

MPORTER TO THE

Oki Europe Limited (trading as Oki Printing Solutions) Blays House

Wick Road Egham Surrey, TW20 0HJ United Kingdom

For all sales, support and general enquiries contact your local distributor.

NVIRONMENTAL INFORMATION

EU/

AUTHORISED REPRESENTATIVE

Manufacturer > 3

ONTENTS

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Manufacturer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Importer to the EU/authorised representative. . . . . . . . . . . . . . . . . . . . .3

Environmental Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Notes, cautions and warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Online usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Printing pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Standard configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Identifying component parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Internal view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Rear view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Interface specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

IEEE1284 parallel interface specifications. . . . . . . . . . . . . . . . . . . . . . . . .15

Connectors and cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Parallel interface signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Parallel interface levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Parallel interface circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Parallel interface timing chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Support mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Universal Serial Bus (USB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

USB interface signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Mode and class of device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Data signalling rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Interface circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Signal level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Timing chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Option interface specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Interface signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Interface timing charts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Receiving margin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Description of communication procedures. . . . . . . . . . . . . . . . . . . . . . .24

Interface control code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Local test function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Operator interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Operator panel functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Print mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Hex Dump mode, Menu mode, Test mode . . . . . . . . . . . . . . . . . . . . . .30

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Alarm/error indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Recoverable alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Unrecoverable alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Menu selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Contents > 4

Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Menu items. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Self test printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Rolling ASCII self test printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Hexadecimal Dump mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Automatic paper loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Auto-parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Form tear-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Print position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Quiet printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

High-copy printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Command descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

ML5720/ML5721 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Horizontal control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Vertical control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Symbol sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Font description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Text print features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

Graphics mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157

Composite commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173

General control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

Barcode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194

ML5790/ML5791 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203

Horizontal control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203

Vertical control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

Character set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227

Font description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241

Text print features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253

Graphics mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261

Composite commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268

General control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .270

Barcode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .279

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .288

Physical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .288

Power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .288

Electrical insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

Environmental conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290

Agency approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290

Print specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290

Paper specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .293

Ribbon specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294

Appendix A – Command summary . . . . . . . . . . . . . . . . . . . . . . . . . . . .295

Appendix B – Print modes/features . . . . . . . . . . . . . . . . . . . . . . . . . . .311

ML5720/ML5721 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

IBM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

EPSON mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .312

ML mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

ML5790/ML5791 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314

IBM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314

EPSON mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

Contents > 5

Appendix C – Code pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316

Appendix D – Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .340

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .340

Continuous paper (continuous forms) . . . . . . . . . . . . . . . . . . . . . . . . . .342

Cut-sheet paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352

Envelopes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .356

Cardstock paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .358

Label paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .358

Appendix E – Barcode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

Barcode external code list EAN8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

Barcode external code list EAN13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .362

Barcode external code list UPC - A. . . . . . . . . . . . . . . . . . . . . . . . . . . . .363

Barcode external code list UPC - E. . . . . . . . . . . . . . . . . . . . . . . . . . . . .364

Barcode external code list CODE39 . . . . . . . . . . . . . . . . . . . . . . . . . . . .365

Barcode external code list interleaved 2-of-5 . . . . . . . . . . . . . . . . . . . . .366

Barcode 128 code list code type: A . . . . . . . . . . . . . . . . . . . . . . . . . . . .367

Barcode 128 code list code type: B . . . . . . . . . . . . . . . . . . . . . . . . . . . .368

Barcode 128 code list code type: C . . . . . . . . . . . . . . . . . . . . . . . . . . . .369

Barcode External code list postnet. . . . . . . . . . . . . . . . . . . . . . . . . . . . .370

Appendix F – Printing specifications. . . . . . . . . . . . . . . . . . . . . . . . . . .371

Measurement conditions and specification value definitions . . . . . . . . . . .371

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .371

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .374

Oki Printing Solutions contact details. . . . . . . . . . . . . . . . . . . . . . . . . .375

Contents > 6

OTES, CAUTIONS AND WARNINGS

NOTE A note provides additional information to supplement the main text.

CAUTION!

A caution provides additional information which, if ignored, may result in equipment malfunction or damage.

WARNING!

A warning provides additional information which, if ignored, may result in a risk of personal injury.

For the protection of your product, and in order to ensure that you benefit from its full functionality, this model has been designed to operate only with genuine original ribbon cartridges. Any other ribbon cartridge may not operate at all, even if it is described as “compatible”, and if it does work, your product's performance and print quality may be degraded.

Use of non-genuine products may invalidate your warranty.

Specifications subject to change without notice. All trademarks acknowledged.

Notes, cautions and warnings > 7

BOUT THIS GUIDE

NOTE Images used in this manual may include optional features that your printer does not have installed.

If required, you may wish to refer for basic information to the User’s Guide which is stored on the manuals CD.

This manual is your Technical Reference guide (check the web site, www.okiprintingsolutions.com, for the most up-to-date version) for your printer and forms part of the overall user support listed below:

> Installation Safety booklet: provides information as to safe use of the printer.

This is a paper document that is packaged with the printer and should be read before setting up your printer.

> Set-up guide: to describe how to unpack and set up your printer.

This is a paper document that is packaged with the printer.

> This Technical Reference Guide: to provide detailed technical information for

programmers and more technical users. This is an electronic document available on the support web site.

> User’s Guide: to help you to become familiar with your printer and make the best

use of its many features. Also included are guidelines for troubleshooting and maintenance to ensure that it performs at its best. Additionally, information is provided for adding optional accessories as your printing needs evolve.

This is an electronic document stored on the manuals CD.

> Network Guide: to provide detailed technical information for network

administrators to configure the optional accessory network interface. This is an electronic document stored on the CD that accompanies the network

interface card optional accessory.

> Installation Guides: accompany consumable items and optional accessories to

describe how to install them. These are paper documents that are packaged with the consumables and optional

accessories.

> Online Help: online information accessible from the printer driver and utility

software.

NLINE USAGE

This guide is intended to be read on screen using an Adobe Acrobat Reader. Use the navigation and viewing tools provided in Acrobat.

You can access specific information in two ways:

> In the list of bookmarks down the left hand side of your screen, click on the topic of

interest to jump to the required topic. (If the bookmarks are not available, use the

“Contents” on page 4.)

> In the list of bookmarks, click on Index to jump to the Index. (If the bookmarks are

not available, use the “Contents” on page 4.) Find the term of interest in the alphabetically arranged index and click on the associated page number to jump to the page containing the term.

About this guide > 8

RINTING PAGES

The whole manual, individual pages, or sections may be printed. The procedure is:

1. From the toolbar, select File, then Print (or press the Ctrl + P keys).

2. Choose which pages you wish to print:

(a) All pages, (1), for the entire manual. (b) Current page, (2), for the page at which you are looking.

1 2 3

page numbers.

3. Click OK.

About this guide > 9

NTRODUCTION

This printer series is designed to provide highly reliable letter quality printing and high resolution graphics for the desktop/office printing environment. It combines state-of-theart, 9-pin (ML5720/ML5721) and 24-pin (ML5790/ML5791), serial impact dot matrix printing technology with advanced materials and superior construction to provide high performance and versatility in a desktop sized unit. Careful attention to ergonomics and application needs provides user friendly operation for operators of varying technical capabilities.

EATURES

The features include:

> OKI smart Paper Handling > 9-pin(ML5720/ML5721) and 24-pin(ML5790/ML5791) double arrangement operator

replaceable printhead

> Direct access control panel > Structured direct access menu for easy set up > Printhead life: 400M characters (average) in 10 CPI Utility mode at normal 25%

duty, 35% page density

> Bi-directional short-line-seeking printing > Print speed:

(ML5790/ML5791)

ML5720/ML5721 ML5790/ML5791

600 CPS HSD (all CPIs) 480 CPS HSD (10 CPI) 700 CPS SSD (12 CPI only) 576 CPS HSD (12 CPI) 450 CPS Draft (10/12/15/20 CPI) 360 CPS Draft (10 CPI) 431 CPS Draft (17.1 CPI) 540 CPS Draft (15 CPI) 113 CPS NLQ (10/12/15 CPI) 120 CPS LQ (10 CPI) 108 CPS NLQ (17.1/20 CPI)

> Paper feed

> Top/Rear/Bottom/Front path > Rear/Front Push tractor > Pull tractor > Friction feed with pinch roller release

> Paper handling

> Automatic sheet loading > Short paper tear-off available by menu selection or TEAR button operation > Auto-loading for single sheet and continuous paper > Auto park feature

Introduction > 10

> Paper copies

ML5720/ML5721 ML5790/ML5791

9 - 11 lb, 6 part (with Rear/Front Push feed)

9 – 11 lb, 7 part (with Pull tractor Front/Bottom Pull feed) (See note)

NOTE Depending on the paper route and media type, printout may appear light on the last paper part. It is recommended to use High Copy mode when the print appears light.

> Paper path capability

9 - 11 lb, 6 part (with Rear/Front Push feed) 9 - 11 lb, 7 part (with Pull tractor Front/Bottom feed)

> Stationery cartridge ribbon > Interfaces

> Standard IEEE1284 parallel interface > USB interface > Optional RS-232C serial interface > Optional Network interface card

9 - 11 lb, 6 part (See Note)

> ML5720/ML5721:Quiet operation at 55 dB(A) in quiet mode and 57 dB(A) in normal

mode

> ML5790/ML5791:Quiet Operation at 52 dB(A) in quiet mode and 57 dB(A) in normal

mode.

> 128 kbytes max. receive buffer >

ML5720/ML5721: Line feed resolution at 1/6 inch, 1/8 inch, n/72 inch,

n/144 inch, n/216 simulated by n/288 inch

ML5790/ML5791: Line feed resolution at 1/6 inch, 1/8 inch, n/60 inch,

n/72 inch, n/180 inch, n/216 inch, n/360 inch.

> Agency approved: GS,CE > Barcode data printing > Postnet bar code data printing

Introduction > 11

TANDARD CONFIGURATION

This printer series consists of the following components:

> Printer mechanism > Power supply unit > Control board (including an IEEE1284 parallel interface and USB port) > Operator panel board > Acoustic covers > Tractor feed unit

PTIONS

> RS-232C Serial Interface Board

NOTE Ensure that the RS-232C Serial Interface board’s communication rate is up to

19.2 K BPS. RS-232C with a lower K BPS cannot be used for this printer.

> LAN7120E3 100BASE-TX/10BASE-T Network Board > Tractor unit (Push and Pull) > Cut-sheet feeder (Single-bin only) > Roll paper stand (ML5720/ML5790)

Introduction > 12

DENTIFYING COMPONENT PARTS

The main parts of your printer are identified and briefly explained below.

RONT VIEW

1. Power Switch: to turn the printer power ON/OFF.

2. Operator Panel: contains buttons and indicators (LEDs) (described in detail later)

that allow you to operate the printer.

3. Front Feed Paper Tray: to feed the cut sheet from the fron t .

4. Front Cover: open to fit the front feed paper tray or to fit the tractor.

5. Platen Knob.

6. Paper Type Lever: set according to the type of paper feed - front feed (cut sheet),

continuous rear feed, continuous front feed or continuous bottom pull.

7. Pull-up Guide Assembly support.

8. Top Feed Paper Tray: raise to feed cut sheet paper from the top.

9. Paper Guide: can be adjusted as required to locate the left edge of cut sheet paper.

10. Top Cover: open and close for access, for example when changing a ribbon

cartridge. Keep closed for noise reduction.

Introduction > 13

NTERNAL VIEW

11. Paper Thickness Lever: set according to the thickness of the paper.

12. Ribbon Cartridge: holds the printer ribbon.

13. Print Head: prints the character on the paper.

14. Pull-up Guide assembly: remove whe n using Pull tractor and optional Cut-sheet

feeder.

EAR VIEW

15. USB connector: connect to USB interface cable.

16. Parallel connector: connect to parallel interface cable.

17. Optional Serial/Network connector: connect to serial or network.

18. Optional CSF/RPS connector: connect to cut-sheet feeder or roll paper stand.

19. Ventilator

20. A/C Input: connect to printer power cable.

Introduction > 14

NTERFACE SPECIFICATIONS

IEEE1284

ONNECTORS AND CABLE

PARALLEL INTERFACE SPECIFICATIONS

Connectors

Printer side:36-pin receptacle 57RE-40360-830B-D29BF (DDk Ltd.) or equivalent Cable side:36-pin plug 57FE-30360 (DDK Ltd.) or equivalent, or 57F-36H-3R straight

type with a metal hood (DDK Ltd.) or equivalent.

Cable

Use a cable less than 1.8 m in total length. (A shielded cable is required and use of twisted-pair wires is recommended for noise

prevention.)

ARALLEL INTERFACE SIGNALS

Pin No. Signal Direction

1 STROBE To printer Samples input data when changing from low

2 DATA BIT 1 To printer Input data: High level indicates “1” and low

3 DATA BIT 2

4 DATA BIT 3

5 DATA BIT 4

6 DATA BIT 5

7 DATA BIT 6

8 DATA BIT 7

9 DATA BIT 8

10 ACKNOWLEDGE From printer Indicates character input completion, or func-

11 BUSY From printer

12 PAPER END From printer High level indicates paper end. AckDataReq

13 SELECT From printer High level indicates select (on line) condition. Xﬂag

14 AUTO FEED To printer When "Auto Feed" in the menu is set as

16, 33 0 V – Signal ground.

CHASSIS GROUND

18 +5 V From printer +5V / 50mA **

19 to 30 0 V – Twisted pair return (for pin No. 1 to 11)

31 INPUT-PRIME To printer When this signal goes to the low level,

32 FAULT From printer This signal goes from high to low level when

15, 34

36 SELECT-IN To printer In the EPSON mode, when menu item "Print

– – Unused

––

level to high level.

level “0”.

tion operation end, at low level.

Indicates data cannot be received at high level. Data can be input at low level.

valid under EPSON mode, this signal goes to the low level and the printer generates a line feed after receiving CR code.

– Frame ground.

printer controller is initialized. The low level should be held for more than 0.5 ms.

paper runs out. (Possible to indicate error and Off-Line state.)

Fixed to High (Connected to +5 V thru 3.3 KΩ)

Suppress Effective" is Yes, and the SELECTIN signal is high, the DC1/DC3 code is valid, and invalid when the signal is low.

** When load is 50m A (more/less), volatage can drop or power can be cut off.

Description

Compatible Nibble

HostClk

PrtClk

PrtBusy

HostBusy

nDataAvail

IEEE1284 active

NOTE Connector pin arrangement for above.

Interface specifications > 15

ARALLEL INTERFACE LEVELS

Low level: 0.0 V to + 0.8 V High level: +2.4 V to +5.0 V

ARALLEL INTERFACE CIRCUITS

(a) Receiver

DATA BIT 1 to DATA BIT 8:

SN74LVC161284DGGR or equivalent

INPUT-PRIME, STROBE:

SN74LVC161284DGGR or equivalent

(b) Driver

ACKNOWLEDGE, PAPER END, SELECT, FAULT, BUSY

SN74LVC161284DGGR or equivalent

Signal Name R (Ω) C (pF)

INPUT-PRIME 47 1000

STROBE 47 47

ARALLEL INTERFACE TIMING CHART

DATA BIT1 to DATA BIT8

(H)

(L)

(H)

(L)

(H)

(L)

UPPORT MODE

STROBE

BUSY

ACKNOWLEDGE

> Compatible

1 μs min

DATA

1~500 μs

500 ns

max

1 μs min

T busy

1t1

2~8 μs

= 1~ 4 μs

> Nibble (PnP Device ID only)

Interface specifications > 16

NIVERSAL SERIAL BUS

(USB)

Universal Serial Bus Specification Revision 2.0 Full Speed mode compliance.

ONNECTORS

Printer Side: “B” Receptacle (Upstream Input to the USB Device) Cable Side: Series “B” Plug

ABLE

Length: Max. 5 m (Cable must be shielded and meet the USB Spec Rev 2.0 for normal operation.)

The cable is not supplied with the printer.

USB

INTERFACE SIGNALS

CONTACT NUMBER SIGNAL NAME

1 Vbus 2 D3 D+ 4 GND Shell Shield

NOTE Connector pin arrangement for above:

ODE AND CLASS OF DEVICE

> Full-speed driver > Self-powered device

ATA SIGNALLING RATE

Full-speed function – 12 Mb/s

Interface specifications > 17

NTERFACE CIRCUIT

TxD+

Full-speed

Buffer

+ 3.3V

IGNAL LEVEL

Input/output level

PARAMETER SYMBOL MIN. MAX. UNITS

Input levels:

High (driven) V High (floating) V Low V

Output levels:

Low OL 0.0 0.3 V High (driven) OH 2.8 3.6 V Output signal crossover

voltage

TxD-

IHZ

CRS

2.0 V

2.7 3.6 V

0.8 V

1.3 2.0 V

Signalling levels

Bus State

Differential “1” (D+)-(D-)> 200mV and D+ > V

Differential “0” (D-)-(D+)> 200mV and D- > V

Single-ended 0 (SE0) D+ and D- < V

Data J state:

Low-speed Full-speed

Data K state:

Low-speed Full-speed

Idle state:

Low-speed Full-speed

Resume state Data K state

Start-ofPacket (SOP)

End-of-Packet (EOP)

Disconnect (at downstream port)

Connect (at downstream port)

Reset D+ and D- < V

Differential “0” Differential “1”

Differential “1” Differential “0”

D- > V D+>V

Data lines switch from Idle to K state

SE0 for ≥ 1 bit time1followed by a J state for 1 bit time

SE0 for ≥ 2.5μs

Idle for ≥ 2ms Idle for ≥ 2.5μs

Required Acceptable

(max) D+ and D- < VIH(min)

(min) and D+ < VIL(max)

IHZ

(min) and D- < VIL(max)

IHZ

(max) for ≥ 10ms D+ and D- < VIL(max) for ≥ 2.5μs

Signalling Levels

(min) (D+)-(D-)> 200mV

(min) (D-)-(D+)> 200mV

D- > V

(min) and D+ < VIH(min)

IHZ

D+ > V

(min) and D- < VIH(min)

IHZ

SE0 for ≥ 1 bit time1followed by a J state

NOTE The width of EOP is defined in bit times relative to the device type receiving the EOP. The bit time is approximate.

Interface specifications > 18

IMING CHART

Packet voltage levels

Disconnect detection

VOH(min)

VIH(min)

VIL(max)

VOL(max)

VSS

VOH(min)

VIH(min)

VIL(max)

VOL(max)

VSS

Bus Idle

SOP

First Bit

of Packet

Last Bit

of Packet

SE0 Portion of EOP

Bus Driven to

J State at end

of EOP

Bus Floats

Bus Idle

VIL

VSS

D+/D-

D-/D+

Device

Connected

VIHZ(min)

Full-speed device connect detection

Device

Connected

D+

VIH

VSS

D-/D+

Differential data jitter

TPERIOD

Differential Data Lines (VCRS)

Crossover

Points

Consecutive

Transitions

TPERIOD + TxDJ1

Transitions

TPERIOD + TxDJ2

>2.5

Paired

μs

>2.5

μs

D-

Disconnect

Detected

Connect

Detected

TPERIOD = 12Mbps( –0.25%) TxDJ1 = Min-3.5ns~Max3.5ns TxDJ2 = Min-4ns~Max4ns

Differential-to-EOP transition skew and EOP width

Crossover Point

TPERIOD

Differential Data Lines

Crossover

Points

Diff. Data-to-

SE0 Skew

TPERIOD + TxDEOP

Interface specifications > 19

Extended

TxDEOP = -2ns~5ns

Source EOP Width : TFEOPT(160ns~175ns)

Receiver EOP Width : TFEOPT(80ns~)

Receive jitter tolerance

TPERIOD

Differential Data Lines

TxJR

Consecutive

Transitions

TPERIOD + TxJR1

TPERIOD + TxJR2

Paired

Transitions

TxJR1

TxJR2

TxJR1 = Min-18.5ns~Max18.5ns TxJR2 = Min-9ns~Max9ns

Interface specifications > 20

PTION INTERFACE SPECIFICATIONS

ENERAL SPECIFICATIONS

ITEM DESCRIPTION

Interface system RS232C Data input Serial Input (Start-Stop synchronisation) Baud rate 300, 600, 1200, 2400, 4800, 9600, 19200 BPS Data word length 7 bits or 8 bits Parity

Stop bit length 1 bit, 2bit or more Message buffer length Buffer size is selected by ‘Receive Buffer Size’ in MENU. Communication protocol Ready/Busy

1. Setting the data length to 7 bits with no pa rity is not recommended.

Odd, even, or no parity

X-ON/X-OFF Ready/Busy & X-ON/X-OFF (ML5720/ML5721)

Interface specifications > 21

NTERFACE SIGNALS

PIN NO. SIGNAL CODE SIGNAL FUNCTION

1 Protective

Ground

2 Transmitted

3 Received Data RD To printer Data to printer 4 (Note 2) Request to Send RTS From

6 (Note 3) Data Set Ready DSR To printer Indicates that data can be sent

7 Signal Ground SG — Signal ground 11 (Note 2) Supervisory

20 (Note 2) Data Terminal

5, 8 to 10, 12 to 19, 21 to 25

Data

Send Data

Ready

— — — Unused

PG — Frame ground

TD From

printer

SSD From

printer

DTR From

printer

Data from printer

Signal to indicate printer cannot receive data in printer Busy/Ready protocol

(Printer receives data after confirming this signal as a SPACE.)

Signal to indicate printer cannot receive data in printer Busy/Ready protocol

NOTE

1. Connector pin arrangement for above:

(Viewed from interface cable side)

2. SSD signal output can be selected from pins 4, 11, 20 by the MENU.

3. DSR signal valid/invalid can be set by the MENU.

LECTRICAL CHARACTERISTICS

Signal levels

RS-232C interface signal levels are as specified below, and meet the EIA Standard RS232C:

–15 to –3 V: MARK = OFF = LOGIC “1” +15 to +3 V: SPACE = ON = LOGIC “0”

Interface specifications > 22

Line driver

INPUT

Equivalent to HIN202

+5V

400kΩ

OUTPUT

NOTE The above figures are the standard values for a load of 3 Kohm, 15 pF.

Line receiver

NOTE If the power on the input side is OFF, the output of the receiver becomes high (+2.4 V or more) at TTL level.

OUTPUT

+5V

-5V

Equivalent to HIN202

INPUT OUTPUT

5kΩ

+3V

-3V

INPUT

+10V

-10V

+30V

-30V

Interface specifications > 23

NTERFACE TIMING CHARTS

Receiving timing chart

DSR signal

NOTE DSR signal valid/invalid can be set by the Menu.

SSD signal timing chart

SPACE

MARK

SPACE

MARK

DTR

Start bit

Stop bit

0.5 bit

More than 0 μs More than 300 μs

Data

Stop bit

SPACE

MARK

0.5 bit Start bit

MAX 5 ms

BUSY

READY

ECEIVING MARGIN

Receiving margin is more than 37% at any baud rate.

ESCRIPTION OF COMMUNICATION PROCEDURES

The types of protocol can be selected by menu communication procedures: READY/BUSY, X-ON/X-OFF and READY/BUSY & X-ON/X-OFF (ML5720/ML5721).

NTERFACE CONTROL CODE

The following function codes are used in the high-speed serial interface:

COMMAND CODE

DC1 (17)D (11)H DC3 (19)D (13)H

NOTE Characters to be printed according to the parity error indication code (40)H will differ depending on the setting of the printer character set. Refer to the printer User’s Guide.

Interface specifications > 24

Ready/Busy protocol

Block format Free Error indication The parity error indication is printed as

character 40(H).

Busy state indication The busy signal turns on (becomes Busy)

Timing chart

RD DATA 1 DATA 2

Threshold of the characters in the buffer

DTR

X-ON/X-OFF protocol

Block format Free Error indication The parity error indication character is

512

when the space in the interface buffer has become less than 256 bytes. The busy signal turns off (becomes Ready) after 200 ms or 1 second has passed if 256 bytes have recovered within 200 ms or 1 second. If the recovery time exceeds 200 ms or 1 second, the busy signal turns off (becomes Ready) immediately after the recovery has occurred.

ON (BUSY) OFF (READY

200 ms or 1 second minimum

converted into code 40(H).

Timing chart

NOTE If data is transferred when the printer is still BUSY, the printer sends a DC3 code every time it receives data.

Busy state indication The DC3 will be sent to the transmission si de

immediately after the space in the interface buffer has become less than 256 bytes to indicate that receiving is impossible. The transmission of the DC3 stops when data receiving has stopped. If the recovery time for 256 bytes is within 200 ms or 1 second after the DC3 is sent, DC1 will be sent 200 ms or 1 second after the recovery to indicate that receiving is possible. If th e recovery time exceeds 200 ms or 1 second, the DC1 is sent immediately after the recovery has occurred.

256 characters or less

TD PRINTING

BUSY state

OFF

DATA 1

3-C

-CD

200 ms or 1 second minimum

Waiting for BUSY state to be free

DATA

1CD

Interface specifications > 25

OCAL TEST FUNCTION

Circuit Test mode setting

Diagnostic: Test set by menu Test connector: Connect the test connectors as shown below to the interface connectors.

RTS

Equivalent to Cannon DB-25P

CTS

SSD

DTR

DSR

Circuit Test mode function

After the settings outlined in Circuit Test mode setting are completed and power is turned on, the serial interface checks the message buffer memory and interface driver and receiver circuits, then prints all characters. To start and stop this test, press the SEL button on the front of the printer. Details of this test are explained below.

1. Print the program revision with two numerical characters.

2. Print “LOOP TEST.”

3. Check memory for message buffer.

Print “GOOD” if memory check is OK, and print “BAD” if memory check fails.

4. Output LOW to DTR, RTS, and SSD signals. If a CTS, DSR, or CD signal is HIGH, print “BAD”. If the CTS, DSR, and CD signals are all LOW, print “IF GOOD”.

Output HIGH to DTR, RTS, and SSD signals. If a CTS, DSR, or CD signal is LOW, print “IF BAD.” If the CTS, DSR and CD signals are all HIGH, print “IF GOOD.”

5. Transmit characters from code 20H to 7FH by TD signals. At the same time, characters are received from the RD signal and stored in the message buffer.

6. Print the characters that were stored in the message buffer as indicated in Step 5.

7. Repeat from Step 1.

Interface specifications > 26

PERATOR INTERFACE

PERATOR PANEL FUNCTIONS

The operator panel buttons and LEDs are located as follows:

Button functions depend on the printer state which can be any one of:

> Print Mode (for a summary of print modes and features see “Appendix B – Print

modes/features” on page 311.)

> Hex Dump Mode > Menu Mode > Test Mode > Power On Mode > Limited Operation

Operator interface > 27

RINT MODE

BUTTON STATUS FUNCTION

SEL On-line Sets the printer to off-line.

Off-line Sets the printer to on-line.

LF/FF On-line/Off-line Feeds paper by one line.

When pressed for more than 500ms, performs form feed.

LOAD/EJECT On-line/Off-line

When no paper is loaded When paper is loaded: Continuous forms Cut-sheet paper Pull feed

TEAR On-line/Off-line

Continuous forms

Pull feed PRINT QUALITY On-line/Off-line Select a font. CHR. PITCH On-line/Off-line Select a character pitch.

Performs paper feed.

Retracts the form to the Pin Tractor. Ejects the cut sheet. Ineffective.

Delivers the continuous form to the cut position.

Ineffective.

PRINT SPEED On-line/Off-line Select print speed. SEL + LF/FF On-line/Off-line Ineffective. SEL + LOAD/EJECT On-line Ineffective.

Off-line Holding down the SEL button and

SEL + CHR.PITCH On-line Ineffective.

Off-line Selects MENU configuration. LF/FF + LOAD/EJECT On-line/Off-line Ineffective. LOAD/EJECT + SEL On-line/Off-line

ML5720/ML5721 Performs microfeed (forward) 1 /144 inch

ML5790/ML5791 Performs microfeed (forward) 1 /180 inch

LOAD/EJECT + LF/FF On-line/Off-line

ML5720/ML5721 Performs microfeed (reverse) 1/144 inch

ML5790/ML5791 Performs microfeed (reverse) 1/180 inch

TEAR + SEL On-line/Off-line

ML5720/ML5721 Performs microfeed (forward) 1 /144 inch

pressing the LOAD/EJECT button initialises the new Menu settings.

when paper is loaded.

when paper is in tear off position.

ML5790/ML5791 Performs microfeed (forward) 1 /180 inch

Operator interface > 28

when paper is in tear off position.

BUTTON STATUS FUNCTION

TEAR + LF/FF On-line/Off-line

ML5720/ML5721 Performs microfeed (reverse) 1/144 inch

ML5790/ML5791 Performs microfeed (reverse) 1/180 inch

PRINT QUALITY + SEL On-line/Off-line

ML5720/ML5721 Performs microfeed (reverse) 1/144 inch

ML5790/ML5791 Performs microfeed (reverse) 1/180 inch

PRINT QUALITY + LF/FFOn-line/Off-line

ML5720/ML5721 Performs microfeed (forward) 1 /144 inch

ML5790/ML5791 Performs microfeed (forward) 1 /180 inch

when paper is in tear off position.

when paper is in Top of Form position.

CHR.PITCH + PRINT SPEED

On-line/Off-line Enters menu mode.

Operator interface > 29

HEX D

UMP MODE

, M

ENU MODE

, T

EST MODE

BUTTON HEX DUMP MODE MENU MODE TEST MODE

SEL On-line: Sets printer Off-

line. Off-line: Sets printer Online.

LF/FF On-line: Feeds paper by

one line. When pressed for more

than 400ms, performs form feed.

Off-line: When paper is loaded, performs form feed for continuous forms and ejects cut-sheet paper.

LOAD/EJECT

TEAR

PRINT QUALITY

> When no paper is loaded:

Performs paper feed.

> When paper is loaded:

> Continuous

forms:Retracts the form to the Pin Tractor.

> Cut-sheet paper:

Ejects the cut sheet.

> Pull feed: Ineffective.

> Delivers the continuous

form to the cut position.

> Pull Feed: Ineffective.

- Temporarily suspends test printing.

Increments a group in a ‘GROUP’.

Increments an item in an ‘ITEM’.

Increments a set in a ‘SET’.

Selects Print Quality

CHR. PITCH Selects Character Pitch PRINT SPEED Selects Print Speed. SEL + LF/FF Decrements a group in

a ‘Group’.

SEL + LOAD/ EJECT

SEL + TEAR Decrements a set in a

CHR. PITCH + PRINT SPEED

Decrements an item in an ‘ITEM’.

‘SET’. Exits Menu mode.

Operator interface > 30

+ 347 hidden pages