OKI ML5720, ML5721, ML5790, ML5791 Technical Reference Guide

ML5720/ML5721/ML5790/ML5791

Technical Reference Guide

PREFACE

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 information in it. 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 to 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 trademark 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	CORE	SHIELD
	(METRE)
Power	1.8
USB	5.0
Serial	2.1
Parallel	2.0
LAN	5.0

Preface > 2

MANUFACTURER

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

Japan

IMPORTER TO THE EU/AUTHORISED REPRESENTATIVE

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.

ENVIRONMENTAL INFORMATION

Manufacturer > 3

CONTENTS

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

NOTES, 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

ABOUT 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.

ONLINE 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

PRINTING 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

(c)Pages from and to, (3), for the range of pages you specify by entering their page numbers.

3.Click OK.

About this guide > 9

INTRODUCTION

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-the- art, 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.

FEATURES

The features include:

>OKI smart Paper HandlingTM (ML5790/ML5791)

>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:

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	9 - 11 lb, 6 part (See Note)
	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

>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

STANDARD 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

OPTIONS

>RS-232C Serial Interface Board

NOTE

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

19.2K 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

IDENTIFYING COMPONENT PARTS

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

FRONT VIEW

	10	9
		8

7

1

9

6

2	5
	3

4

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 front.

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

INTERNAL VIEW

11

12

13

14

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 when using Pull tractor and optional Cut-sheet feeder.

REAR VIEW

18

19

17

16

15

20

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

INTERFACE SPECIFICATIONS

IEEE1284 PARALLEL INTERFACE SPECIFICATIONS

CONNECTORS AND CABLE

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.)

PARALLEL INTERFACE SIGNALS

Pin No.	Signal							Direction	Description
									Compatible		Nibble
1	STROBE							To printer	Samples input data when changing from low	HostClk
									level to high level.
2	DATA BIT 1							To printer	Input data: High level indicates “1” and low	?
3	DATA BIT 2								level “0”.
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-	PrtClk
									tion operation end, at low level.
11	BUSY							From printer	Indicates data cannot be received at high level.	PrtBusy
									Data can be input at low level.
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	HostBusy
									valid under EPSON mode, this signal goes
									to the low level and the printer generates a
									line feed after receiving CR code.
16, 33	0 V							–	Signal ground.	<
17	CHASSIS GROUND							–	Frame 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,	<
									printer controller is initialized. The low level
									should be held for more than 0.5 ms.
32	FAULT							From printer	This signal goes from high to low level when	nDataAvail
									paper runs out.
									(Possible to indicate error and Off-Line state.)
15, 34		–						–	Unused	<
35		–						–	Fixed to High (Connected to +5 V thru 3.3 KΩ)	<
36	SELECT-IN							To printer	In the EPSON mode, when menu item "Print	IEEE1284
									Suppress Effective" is Yes, and the SELECT-	active
									IN 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.

NOTE

Connector pin arrangement for above.

18	1
36	19

Interface specifications > 15

PARALLEL INTERFACE LEVELS

Low level: 0.0 V to + 0.8 V

High level: +2.4 V to +5.0 V

PARALLEL INTERFACE CIRCUITS

(a)Receiver

DATA BIT 1 to DATA BIT 8:

SN74LVC161284DGGR or equivalent

INPUT-PRIME, STROBE:

SN74LVC161284DGGR or equivalent

R			C
	0V

Signal Name	R (Ω)	C (pF)
INPUT-PRIME	47	1000
STROBE	47	47

(b)Driver

ACKNOWLEDGE, PAPER END, SELECT, FAULT, BUSY SN74LVC161284DGGR or equivalent

PARALLEL INTERFACE TIMING CHART

DATA BIT1 to

DATA

DATA BIT8

(H)

STROBE

(L)

1

μs

1 μs

1~500

μs

min

min

(H)

BUSY

(L)

T busy

500 ns max

(H) ACKNOWLEDGE (L)

t1 t1

t1 = 1~ 4 μs 2~8 μs

SUPPORT MODE

>Compatible

>Nibble (PnP Device ID only)

Interface specifications > 16

UNIVERSAL SERIAL BUS (USB)

Universal Serial Bus Specification Revision 2.0 Full Speed mode compliance.

CONNECTORS

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

Cable Side: Series “B” Plug

CABLE

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	D-
	3	D+
	4	GND
	Shell	Shield

NOTE

Connector pin arrangement for above:

21

34

MODE AND CLASS OF DEVICE

>Full-speed driver

>Self-powered device

DATA SIGNALLING RATE

Full-speed function – 12 Mb/s

Interface specifications > 17

INTERFACE CIRCUIT

Full-speed

	Buffer	+ 3.3V
TxD+	Rs
TxD-	Rs

SIGNAL LEVEL

Input/output level

PARAMETER	SYMBOL	MIN.	MAX.	UNITS
Input levels:
High (driven)	VIH	2.0		V
High (floating)	VIHZ	2.7	3.6	V
Low	VIL		0.8	V
Output levels:
Low	OL	0.0	0.3	V
High (driven)	OH	2.8	3.6	V
Output signal crossover	VCRS	1.3	2.0	V
voltage

Signalling levels

Bus State	Signalling Levels
	Required			Acceptable
Differential “1”	(D+)-(D-)> 200mV and D+ > VIH(min)		(D+)-(D-)> 200mV
Differential “0”	(D-)-(D+)> 200mV and D- > VIH(min)		(D-)-(D+)> 200mV
Single-ended 0 (SE0)	D+ and D- < VIL(max)		D+ and D- < VIH(min)
Data J state:
Low-speed	Differential “0”
Full-speed	Differential “1”
Data K state:
Low-speed	Differential “1”
Full-speed	Differential “0”
Idle state:
Low-speed	D- > VIHZ(min) and D+ < VIL(max)		D- > VIHZ(min) and D+ < VIH(min)
Full-speed	D+ > VIHZ(min) and D- < VIL(max)		D+ > VIHZ(min) and D- < VIH(min)
Resume state	Data K state
Start-of-	Data lines switch from Idle to K state
Packet (SOP)
End-of-Packet (EOP)	SE0 for ≥ 1 bit time1 followed by a J		SE0 for ≥ 1 bit time1 followed by a J
	state for 1 bit time		state
Disconnect	SE0 for ≥ 2.5μs
(at downstream port)
Connect	Idle for ≥ 2ms		Idle for ≥ 2.5μs
(at downstream port)
Reset	D+ and D- < VIL (max) for ≥ 10ms		D+ and D- < VIL (max) for ≥ 2.5μs

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

TIMING CHART

Packet voltage levels

VOH(min)

VIH(min)

VIL(max)

VOL(max)

VSS								Bus Driven to
Bus Idle					Last Bit
				First Bit				J State at end
					of Packet SE0
	SOP of Packet						Portion	of EOP
							of EOP		Bus Floats
										Bus Idle

VOH(min)

VIH(min)

VIL(max)

VOL(max)

VSS

Disconnect detection

D+/D-
VIHZ(min)
VIL
D-/D+
VSS
	>2.5μs
Device	Disconnect
Connected
	Detected

Full-speed device connect detection

	D+
VIH
D-/D+	D-
VSS
	>2.5μs
Device	Connect
Connected	Detected

Differential data jitter

TPERIOD

		Crossover
Differential		Points
Data Lines
(VCRS)
		Consecutive
		Transitions				TPERIOD = 12Mbps(–0.25%)
		N* TPERIOD + TxDJ1				TxDJ1 = Min-3.5ns~Max3.5ns
		Paired				TxDJ2 = Min-4ns~Max4ns
		Transitions
		N* TPERIOD + TxDJ2

Differential-to-EOP transition skew and EOP width

Crossover Point

TPERIOD

Extended

	Crossover
Differential	Points
Data Lines
	Diff. Data-to-
	SE0 Skew
	N* TPERIOD + TxDEOP

TxDEOP = -2ns~5ns

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

Receiver EOP Width : TFEOPT(80ns~)

Interface specifications > 19

Receive jitter tolerance

TPERIOD

Differential

Data Lines

TxJR

TxJR1

TxJR2

Consecutive

Transitions

N* TPERIOD + TxJR1

TxJR1 = Min-18.5ns~Max18.5ns

Paired TxJR2 = Min-9ns~Max9ns

Transitions

N* TPERIOD + TxJR2

Interface specifications > 20

OPTION INTERFACE SPECIFICATIONS

GENERAL 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	Odd, even, or no parity1
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
	X-ON/X-OFF
	Ready/Busy & X-ON/X-OFF (ML5720/ML5721)

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

Interface specifications > 21

INTERFACE SIGNALS

PIN NO.	SIGNAL	CODE	SIGNAL		FUNCTION
1	Protective	PG	—		Frame ground
	Ground
2	Transmitted	TD	From		Data from printer
	Data		printer
3	Received Data	RD	To printer		Data to printer
4 (Note 2)	Request to Send	RTS	From		Signal to indicate printer cannot
			printer		receive data in printer Busy/Ready
					protocol
6 (Note 3)	Data Set Ready	DSR	To printer		Indicates that data can be sent
					(Printer receives data after
					confirming this signal as a SPACE.)
7	Signal Ground	SG	—		Signal ground
11 (Note 2)	Supervisory	SSD	From		Signal to indicate printer cannot
	Send Data		printer		receive data in printer Busy/Ready
					protocol
20 (Note 2)	Data Terminal	DTR	From		Signal to indicate printer cannot
	Ready		printer		receive data in printer Busy/Ready
					protocol
5, 8 to 10,	—	—	—		Unused
12 to 19,
21 to 25
NOTE
1. Connector pin arrangement for above:
	13		1
	25		14	(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.

ELECTRICAL 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

Equivalent to HIN202

+5V 400kΩ

INPUT OUTPUT

OUTPUT				+10V
				+5V

-5V

-10V

NOTE

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

Line receiver

Equivalent to HIN202

INPUT OUTPUT

5kΩ

+30V

+3V

				-3V
INPUT				-30V

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.

Interface specifications > 23

INTERFACE TIMING CHARTS

Receiving timing chart

DSR signal

SPACE

MARK

Start bit

Stop bit

SPACE

RD

MARK

0.5 bit

More than 0 μs

More than 300 μs

NOTE

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

SSD signal timing chart

				Data
RD									Stop bit
SPACE
MARK
			Start bit				0.5 bit
							MAX 5 ms
DTR
BUSY
READY

RECEIVING MARGIN

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

DESCRIPTION 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).

INTERFACE 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)

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.

Timing chart

RD

DATA 1

DATA 2

Threshold of the

8K

characters in

512

the buffer

0

DTR

ON (BUSY)

OFF (READY

200 ms or 1 second minimum

X-ON/X-OFF protocol

Block format	Free
Error indication	The parity error indication character is
	converted into code 40(H).
Busy state indication	The DC3 will be sent to the transmission side
	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 the recovery
	time exceeds 200 ms or 1 second, the DC1
	is sent immediately after the recovery has
	occurred.

Timing chart

RD

TD

PRINTING

ON

BUSY state

OFF

	256 characters or less
							Waiting for BUSY
DATA 1									DATA
							state to be free
3		3		3				1
-		-		-
	C	C		C				C
	D	D		D				D

200 ms or 1 second minimum

NOTE

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

Interface specifications > 25

LOCAL TEST FUNCTION

Circuit Test mode setting

Diagnostic: Test set by menu

Test connector: Connect the test connectors as shown below to the interface connectors.

			2
		TD
			3
		RD
			4
		RTS
			5
	Equivalent to Cannon DB-25P	CTS
			8
		CD
			11
		SSD
			20
		DTR
			6
		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

OPERATOR INTERFACE

OPERATOR 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

PRINT 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	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.
TEAR	On-line/Off-line
	Continuous forms	Delivers the continuous form to the cut
		position.
	Pull feed	Ineffective.
PRINT QUALITY	On-line/Off-line	Select a font.
CHR. PITCH	On-line/Off-line	Select a character pitch.
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
		pressing the LOAD/EJECT button
		initialises the new Menu settings.
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
		when paper is loaded.
	ML5790/ML5791	Performs microfeed (forward) 1/180 inch
		when paper is loaded.
LOAD/EJECT + LF/FF	On-line/Off-line
	ML5720/ML5721	Performs microfeed (reverse) 1/144 inch
		when paper is loaded.
	ML5790/ML5791	Performs microfeed (reverse) 1/180 inch
		when paper is loaded.
TEAR + SEL	On-line/Off-line
	ML5720/ML5721	Performs microfeed (forward) 1/144 inch
		when paper is in tear off position.
	ML5790/ML5791	Performs microfeed (forward) 1/180 inch
		when paper is in tear off position.

Operator interface > 28

BUTTON	STATUS	FUNCTION
TEAR + LF/FF	On-line/Off-line
	ML5720/ML5721	Performs microfeed (reverse) 1/144 inch
		when paper is in tear off position.
	ML5790/ML5791	Performs microfeed (reverse) 1/180 inch
		when paper is in tear off position.
PRINT QUALITY + SEL	On-line/Off-line
	ML5720/ML5721	Performs microfeed (reverse) 1/144 inch
		when paper is in Top of Form position.
	ML5790/ML5791	Performs microfeed (reverse) 1/180 inch
		when paper is in Top of Form position.
PRINT QUALITY + LF/	On-line/Off-line
FF	ML5720/ML5721	Performs microfeed (forward) 1/144 inch
		when paper is in Top of Form position.
	ML5790/ML5791	Performs microfeed (forward) 1/180 inch
		when paper is in Top of Form position.
CHR.PITCH + PRINT	On-line/Off-line	Enters menu mode.
SPEED

Operator interface > 29

HEX DUMP MODE, MENU MODE, TEST MODE

BUTTON	HEX DUMP MODE			MENU MODE	TEST MODE
SEL	On-line: Sets printer Off-			-	Temporarily suspends
	line.				test printing.
	Off-line: Sets printer On-
	line.
LF/FF	On-line: Feeds paper by			Increments a group in a
	one line.			‘GROUP’.
	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	> When no paper is loaded:			Increments an item in
		Performs paper feed.		an ‘ITEM’.
	> When paper is loaded:
		>	Continuous
			forms:Retracts the
			form to the Pin
		Tractor.
		> Cut-sheet paper:
			Ejects the cut sheet.
		>	Pull feed: Ineffective.
TEAR	>	Delivers the continuous		Increments a set in a
		form to the cut position.		‘SET’.
	>	Pull Feed: Ineffective.
PRINT					Selects Print Quality
QUALITY
CHR. PITCH					Selects Character Pitch
PRINT SPEED					Selects Print Speed.
SEL + LF/FF				Decrements a group in
				a ‘Group’.
SEL + LOAD/				Decrements an item in
EJECT				an ‘ITEM’.
SEL + TEAR				Decrements a set in a
				‘SET’.
CHR. PITCH +				Exits Menu mode.
PRINT SPEED

Operator interface > 30