OKI ML3320 ECO, ML3321 ECO, ML3390 ECO, ML3391 ECO User Guide

P

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 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:

http://www.okiprintingsolutions.com

07112201 iss. 01; Copyright © 2010 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 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 using products.

This product complies with EN55022 Class B. However, when fitted with the
optional network interface card, RS-232 C serial interface card or optional cut­sheet 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 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 1.5

Parallel 5.0

CORE SHIELD

✘✘

✘ ✔

✘ ✔

✘✘

Lan 2.1

✘ ✔

Preface > 2

M

ANUFACTURER

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

I

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.

E

NVIRONMENTAL

EU/

INFORMATION

AUTHORISED REPRESENTATIVE

Manufacturer > 3

C

ONTENTS

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

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

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

Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

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

Notes, cautions and warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

On-line usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Printing pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Retaining packing materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Identifying component parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Locating your printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Powering on your printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Powering off your printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Connecting to your printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Interconnection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Printer drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Printing from a computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Oki DIPUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Controlling the printer using DIPUS . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Loading paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Loading continuous forms (Rear feed) . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Loading single sheets (Top feed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Setting the top of form (TOF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Temporarily changing the top of form setting . . . . . . . . . . . . . . . . . . . .19

Resetting the top of form to the standard setting . . . . . . . . . . . . . . . . .20

Setting the printhead gap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Running the self tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Selecting an emulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Using the printer’s features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Tear feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Forms tear-off feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Paper park feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Print mode: indicator lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Print mode: control panel keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Selecting the print quality and font . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Menu mode: control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Entering and exiting the menu mode . . . . . . . . . . . . . . . . . . . . . . . . . .30

Summary of Menu settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Replacing the ribbon cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Cleaning your printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Printer exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Cleaning the housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Installing options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Contents > 4

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Clearing paper jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Rear-feed jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Correcting repetitive rear-feed jams . . . . . . . . . . . . . . . . . . . . . . . . . .48

Single-sheet jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Responding to general problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Oki contact details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Contents > 5

N

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
cartridge. 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 > 6

I

NTRODUCTION

Congratulations on purchasing this printer!
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 (ML3320ECO/ML3321ECO) and 24-pin (ML3390ECO/ML3391ECO), 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.

A

BOUT THIS GUIDE

This manual is your user’s 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, connect and turn on your printer.

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

> This 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.

This is an electronic document stored on the manuals CD.

> Network Configuration 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.

> On-line Help: on-line information accessible from the printer driver and utility

software.

ON-

LINE 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.

Introduction > 7

P

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

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

page numbers.

3. Click on OK.

Introduction > 8

G

ETTING STARTED

WARNING!

If you have not already done so, familiarise yourself with the
content of the Installation Safety booklet supplied with your
printer.

R

ETAINING PACKING MATERIALS

After setting up your printer according to the instructions in the Set-up Guide, retain your
packing materials and container in case you ever need to ship or transport your printer.

I

DENTIFYING COMPONENT PARTS

F

RONT VIEW

7

1

6

5

2

4

3

1. Access cover: open and close for access, for example when changing a ribbon
cartridge. Keep closed for noise reduction.

2. Control panel: contains button switches and indicators (described in detail later) that
allow you to operate the printer.

3. Platen knob: turn to move or eject the paper.

4. Power switch: to turn the printer ON/OFF.

5. Paper lever: set according to the type of paper used - cut sheet or continuous forms.

6. Paper separator: to hold cut sheet paper for use by the printer (one sheet at a time).

7. Paper guides: adjust to suit the width of the cut sheet paper.

Getting started > 9

R

EAR VIEW

1

5

2

3

6

4

1. Optional connector position: connect to optional accessory serial interface card or
100Base-TX/10Base-T network card.

2. Cut-sheet feeder/ Roll Paper stand connector: connect the optional cut-sheet feeder
or the roll paper stand.

3. Parallel connector: connect to parallel interface connector.

4. USB connector: connect to USB interface cable.

5. Pin Tractor: to load and feed continuous forms.

6. Power connector: connect to printer power cable.

L

OCATING YOUR PRINTER

> Select a firm solid surface on which to site your printer.
> Allow enough space around your printer (e.g. at least 60cm from any wall) for easy

access to the platen knob and the various paper feed paths.

> Make sure a grounded power outlet is available nearby.

P

OWERING ON YOUR PRINTER

WARNING!

Operations of this equipment are not warranted when the
equipment is connected to UPS (Uninterruptible Power Supply)
and/or inverter. Doing so may result in damage of this equipment.
Do not use an UPS and/or inverter.

1. Ensure that your printer power switch is set to OFF.

2. Connect the power cable connector (1) to the A/C Input (2) on the printer.

Getting started > 10

3. Connect the power cable to a 220/240 V A/C power outlet (3a) and switch on the
outlet power (3b).

WARNING!

Be careful when inserting a three-pronged AC plug. Before
plugging it in, check the position of the FG terminal. Incorrect
insertion may cause damage not only to the printer main body but
also peripheral devices and electric shock, smoke and ignition.

4. Turn the printer power switch ON.

5. Check that the power indicator on the control panel illuminates.

P

OWERING OFF YOUR PRINTER

1. Turn the printer Power Switch to OFF.

2. Switch off the outlet power (1a) and then unplug from the power outlet (1b).

1a

1b

3

2

3. Unplug the power cable connector (2) from the printer (3).

Getting started > 11

C

ONNECTING TO YOUR PRINTER

I

NTERFACES

Your printer is equipped with two standard data interfaces:

CAUTION!

Under no circumstances attempt to use both parallel and USB ports
simultaneously.

> Parallel: for direct connection to a PC. This port requires a bi-directional (IEEE 1284

compliant) parallel cable.

> USB: for connection to a PC running Windows 2000 or above. This port requires a

shielded cable 5m long confirming to USB version 2.0.

NOTE
Interface cables are not supplied with your printer.

The following interfaces are available as optional accessories and are described in their
accompanying installation documentation:

> RS232 C Serial interface
> 100Base-TX/10Base-T network connection

NOTE

> Refer to the Network Configuration Guide for setting up the network

connection.

> It is not recommended that you use either the Parallel or USB port when

the RS-232 C or OL7120E3 option is installed in this printer.

I

NTERCONNECTION

1. Ensure that both printer and computer are turned OFF.

2. Connect the required interface cable, USB, Parallel, Serial or Network to the printer

and then to the computer.

3. Turn ON the printer and then turn ON the computer.

P

RINTER DRIVERS

The driver for your printer is provided on the CD included with the printer. You can either
load the driver or select one of the compatible drivers listed below in your software

application.

IBM PROPRINTER III EPSON FX MICROLINE STANDARD

ML3320/1 IBM ML3320/1 Epson Microline 320/321

IBM Proprinter III Epson FX286e Microline 320/321

IBM Proprinter II Epson FX 850/1050 Microline 320/321

IBM Proprinter Epson FX 86/286 Microline 292/293

IBM Graphics Printer Epson FX Microline 192/193

Epson FX800/1000 Microline 182/183

Connecting to your printer > 12

Insert the CD into your CD-ROM drive.

NOTE
If the CD does not AutoPlay, click Start
CD-ROM drive, double-click Setup.exe and click OK.

1. Select your Language.

2. Click I agree to accept the terms of the Software Licence Agreement.

3. When the Menu Installer window appears, click the Install Driver button.

4. Follow the on-screen instructions.

>

Run > Browse, then browse to your

Emulations

The factory default emulation for your printer is:

MODEL EMULATION (DEFAULT)

ML3320ECO/ML3321ECO IBM PPR

ML3390ECO/ML3391ECO EPSON LQ

If you wish to change to other emulations, see “Selecting an emulation” on page 21.

P

RINTING FROM A COMPUTER

When printing to your printer from, for example, a Windows application on your computer,
make your printing selections from the driver windows that appear on screen. These driver
windows have been designed to be easy to use and intuitive while supplementary on-line
help is available by clicking each window help button.

OKI DIPUS

The OKI DIPUS utility allows you remote access to the printer settings using the available
applications. You can access DIPUS from Start > All Programs > Okidata > OKI DIPUS.

C

ONTROLLING THE PRINTER USING

There are four utilities available within OKI DIPUS. Each utility provides access to the
printer settings from your computer. Using these utilities you can change the button
settings, menu settings, top of form settings and also view the current status of the printer.
Any changes made can then be uploaded to the printer and it will be saved to the printer
as new settings. These utilities are an alternative to the printer operator panel.

Button setup utility

Using this utility you can activate or deactivate buttons on your printer operator panel. Each
button and its function is described in a message view.

Menu setup utility

DIPUS

Using this utility you can view and change your printers’ Menu settings.

Status monitor

The Status Monitor utility allows you to view your printers’ current status for example, On­line, On-line (power saving) and so on. In the event of a printer error occurring, a warning
message is also displayed.

Connecting to your printer > 13

TOF setup utility

Using this utility you can now set the first line of print (TOF) for each page. This utility
allows you to treat each print job individually.

For detailed information on each utility and the different settings contained within, refer to
the on-line help, by clicking each window Help button.

Connecting to your printer > 14

L

OADING PAPER

L

OADING CONTINUOUS FORMS

We recommend the rear-feed path for printing reports, etc., on single-thickness,
continuous-form paper. For graphics or charts, it's best to use the single-sheet path (top
feed).

NOTE
If you have paper in the paper path, be sure to remove it before installing
rear-feed paper.

(R

EAR FEED

)

Tractor terms

1

1. Move the paper lever to the position marked “REAR.”

2. Grasp the paper separator, lift it slightly, pull back on it, then swing it forward.

2
3

1. Pins

2. Lock lever

3. Tractor cover

Loading paper > 15

3. Pull up on the lock levers and open the tractor covers.

4. Move the right tractor over to fit the width of the paper.

13/03/96, 16:07

5. Place the first two holes in the paper over the tractor pins on either side and close
the tractor covers.

6. Move the left tractor to align the edge of the paper with the appropriate reference
mark (1), and push back the lock lever.

1

Loading paper > 16

7. Adjust the right tractor to centre the paper holes on the pins, and push back the lock
lever.

8. Lower the paper separator and place the wire guide (1) on the pull-up roller
assembly (2).

1

2

9. Press FF/LOAD. The paper feeds into the printer.

NOTE
The standard setting for the Top of Form (where the printing begins) is 2.54cm
down from the top of the page. To change the setting, “Setting the top of form

(TOF)” on page 19.

L

OADING SINGLE SHEETS

Use the single-sheet path for letter head stationery, memos, and individual envelopes. It
is recommended for printing graphs and charts because it provides the most accurate
control of the paper.

NOTE
If you have continuous-form paper in the path, press the PARK button to
remove it before loading single sheets.

1. Make sure the printer is on and deselected (SEL light off).

2. Place the paper lever in the position marked “TOP”.

(TOP

FEED

)

Loading paper > 17

3. Open the carriage cover and lift the paper separator to the single-sheet position.

4. Make sure the wire feed guide (1) is in the paper separator.

1

5. Adjust the paper feed guides (1) for the width of the paper and place a sheet of
paper in the separator. The paper will feed into the printer.

1

NOTE
The standard setting for the Top of Form (where the printing begins) is

2.54cm, down from the top of the page. To change the setting, “Setting the

top of form (TOF)” on page 19.

Loading paper > 18

S

ETTING THE TOP OF FORM

When setting the Top of Form, use the red line (1) on the paper shield as a reference:

(TOF)

1

M

1. Make sure the printer is deselected (SEL light off).

2. Press and hold SHIFT (1), then:

(a) Press LF (2) to move Top of Form higher on page
(b) Press FF/LOAD (3) to move Top of Form lower on page

12

3. Press SEL to re-select the printer.

T

EMPORARILY CHANGING THE TOP OF FORM SETTING

To set the Top of Form position lower for one page only:

1. Press SEL to deselect the printer.

3

2. Press LF to change the position of the Top of Form.

NOTE
This setting will not apply to any following pages.

Loading paper > 19

R

ESETTING THE TOP OF FORM TO THE STANDARD SETTING

1. Turn the printer off.

2. Hold PARK + QUIET/TOF while turning the printer back on.

Switching paper paths

To switch from continuous-forms to single-sheet feed:

1. Tear off any printed pages.

2. Press PARK.

3. Move the paper separator to the single-sheet feed position.

4. Place the wire feed guide in the paper separator.

5. Move the paper lever to the position marked “TOP.”

6. Place a sheet of paper in the paper separator.

To switch from single-sheet feed to continuous forms:

1. Press FF/LOAD to remove the single-sheet paper.

2. Lower the paper separator into the continuous-forms position and swing the wire

feed guide over onto the pull-up roller.

3. Move the paper lever to the position marked “REAR” or “BOT,” as appropriate.

4. Load continuous-form paper, then press FF/LOAD.

S

ETTING THE PRINTHEAD GAP

The printhead gap is the distance between the printhead and the platen. To adjust the gap,
open the access cover and move the blue lever (1) to the recommended setting from the
table below.

1

NOTE
It is recommended that the printer be switched off prior to removing the
access cover.

Loading paper > 20

R

UNNING THE SELF TESTS

Font sample test

To run the test: Turn the printer off, then press and hold LF while

To stop the test: If you wish to stop the test before it is complete,

MEDIA SETTING

45 - 75g/m² paper 1

75-90g/m² bond paper 2

Labels 3 - 4

Envelopes 5

2-part form (w/carbon) 3 - 4

3-part form (w/carbon) 4 - 5

4-part form (w/carbon) 5

turning the printer on.

press SEL.

ASCII test

To run the test: Turn the printer off, then press and hold QUIET

while turning the printer on.

To stop the test: Press SEL.

S

ELECTING AN EMULATION

The factory default emulation for your printer is:

To change to one of the other emulations:

1. Make sure paper is loaded.

2. Deselect the printer (SEL light off, press SEL key).

MODEL EMULATION (DEFAULT)

ML3320ECO/ML3321ECO IBM PPR

ML3390ECO/ML3391ECO EPSON LQ

Loading paper > 21

3. Press SHIFT + SEL: the printer will enter the Menu Mode.

4. Press LF.

The following line will print:

Printer Control Emulation Mode IBM PPR

5. Press TEAR consecutively until the emulation you wish to select prints in the right­hand column.

6. Press SHIFT + SEL to save your setting and exit the Menu Mode.

Loading paper > 22

U

SING THE PRINTER’S FEATURES

T

EAR FEATURE

1

Use this feature to advance continuous-form paper up to the tear position by simply
pressing TEAR (1).

NOTE
The Tear Feature can not be used when the optional pull tractor is engaged.

F

ORMS TEAR-OFF FEATURE

NOTE
Never engage Forms Tear-Off when printing on labels!

The Forms Tear-Off feature automatically moves continuous-form paper up to the tear
position after the interval you select, then moves it back down again for printing when the
printer receives more data.

This feature is normally turned off. To activate it:

1

1. Press SHIFT (2) + SEL (1).

2. Press GROUP (3) until one of the following lines appears, depending on which paper

feed you are using:

REAR FEED Form Tear-Off OFF

BOTTOM FEED Form Tear-OFF OFF

3. Press SET (4) consecutively until the time interval you wish to select appears in the
third column.

4. Press SHIFT (2) + SEL (1) to exit Menu Mode and save the setting.

2

3

4

NOTE
Some programs pause occasionally while sending data. If the pause is too
long, the paper will advance to the tear-off position until more data is
received. This extra paper movement can cause uneven print registration in
graphics. If you have this problem, use the menu to turn off this feature.

Loading paper > 23

P

APER PARK FEATURE

1

To retract rear-feed paper form the paper path, press PARK (1).

Loading paper > 24

O

PERATING INSTRUCTIONS

P

RINT MODE: INDICATOR LIGHTS

1

4

2

3

5

6

NO. INDICATOR DESCRIPTION

1. SEL Glows: printer selected, ready to receive data

Flashes: printer in Print Suppress Mode

Not lit: printer deselected (can’t receive data)

2. QUIET Glows: printer in Quiet state.

3. POWER Glows: printer turned on

4. PRINT QUALITY Indicate print quality and font selected.

5. ALARM Glows: error condition exists:

> out of paper if no other lights are blinking.
> paper jam if 15 cpi light is also blinking
> paper lever is set to wrong position if 10 cpi light is

also blinking.

Blinks: error condition. Turn printer off, then on; if
the light still flashes, contact your service dealer.

6. 10/12/15/17/20/PROP Indicate character pitch selected.

Operating instructions > 25

P

RINT MODE: CONTROL PANEL KEYS

1

2

NO. KEYS DESCRIPTION

1. SEL Selects/deselects printer. When held on power up,

2. SHIFT Press and hold while pressing another switch to

3. LF Moves paper up one line: press and hold for

3

678

engages the Menu Mode.

engage the alternate function for that switch (e.g.
“Micro Feed Down” for the LF key).

repetitive line feeds. When held on power up,
activates the Font Test.

4

5

9

4. QUIET Turns Quiet Mode on and off. When held on power

5. PRINT QUALITY Selects the print quality and font.

6. FF/LOAD Loads/ejects single sheet of paper; moves

7. TEAR Moves continuous-form paper up for tear-off or

8. PARK Retracts continuous-form paper from the path.

9. CHARACTER PITCH Selects the character pitch. Used with the SHIFT

up, activates the Rolling ASCII Test.

continuous-form paper to print position.

back down for printing.

key to reset the printer.

Operating instructions > 26

S

ELECTING THE PRINT QUALITY AND FONT

NOTE
Front panel settings for print quality and character pitch can be overridden by
software commands. The lights will always reflect the printer's state.

ML3320ECO/ML3321ECO

Press PRINT QUALITY to select:

HSD: High Speed Draft > Lower quantity, faster speed

UTL: Utility > Medium quality, medium speed

NLQ: Near Letter Quality > Highest quality, slowest speed

SSD: Super Speed Draft > Lowest quality (12 cpi only),

PRINT QUALITY

HSD

NLQ

UTL

SSD

> Gothic font only
> Recommended for preliminary

drafts

> Gothic font only
> Recommended for internal

documents and high-volume data

> Courier or Gothic fonts
> Recommended for correspondence

fastest speed

> Gothic font only
> Recommended for fastest output

of preliminary drafts

In order to use Super Speed Draft (SSD), you must enter the Menu Mode and make
changes:

1. Press SHIFT + SEL

2. Press GROUP twice.

3. Press ITEM.

4. Press SEL until DRAFT appears as the setting for the Print Mode.

5. Press ITEM.

6. Press SEL (SSD appears as the setting for the DRAFT Mode).

7. Press SHIFT + SEL key to exit the Menu Mode and save your changes.

Operating instructions > 27

ML3390ECO/ML3391ECO

Press PRINT QUALITY to select:

LQ: Letter Quality

> Highest quality, slowest speed
> Seven fonts
> Recommended for correspondence

UTILITY

> Medium quality, medium speed
> Gothic font only
> Recommended for internal

documents and high-volume data

NOTE
To select High Speed Draft mode, set the Print Quality to UTILITY and the
Character Pitch to 15.

When Letter Quality is engaged, the lights indicate which font is selected:

FONT INDICATOR

Courier LQ and Courier lights on

Gothic LQ and Gothic lights on

Orator LQ and Orator lights on

Prestige LQ and Prestige lights on

Roman LQ, Courier and Gothic lights on

Swiss LQ, Orator and Prestige lights on

Swiss Bold LQ light on

Operating instructions > 28

Selecting the Character Pitch

Press CHARACTER PITCH to select the width of characters in characters per inch:

10 cpi

12 cpi

15 cpi > In HSD mode, yields fastest

17.1 cpi, 20 cpi > Smallest print

PROP > Proportional spacing

M

ENU MODE: CONTROL PANEL

> Recommended for standard text.

> Yields more text per page.
> Recommended for standard text.

printing.

> Recommended for large volumes

of data.

> Recommended for spreadsheets.

> Recommended for documents

where you want a more polished
appearance.

> Not available for High Speed Draft.

1

23

4

5

NO. KEY FUNCTION

1. GROUP Prints the next Group in the Menu. With the SHIFT
key, prints the previous Group.

2. ITEM Prints the next Item in the Group. With the SHIFT
key, prints the previous Item in the Group.

3. SET Prints the next Setting for an Item. With the

4. PRINT Prints a copy of all the Menu settings. With the

5. MENU LIGHT Glows when the printer is in the Menu Mode.

SHIFT key, prints the previous Setting for an
Item.

SHIFT key, prints the current settings for the
Group selected.

Operating instructions > 29

E

NTERING AND EXITING THE MENU MODE

To enter or exit the Menu Mode, hold SHIFT while pressing SEL.

Resetting the Menu

To reset the Menu to the standard settings:

1. Turn the printer off.

2. Press SEL + LF while turning the printer on.

Printing the Menu settings

1. Make sure paper is loaded in the printer.

2. Enter the Menu Mode (SHIFT + SEL).

3. Press PRINT (PARK).

NOTE
To print out a listing of the settings for all menu items, regardless of the
emulation selected or the accessories installed, enter the Menu Mode, then
press SHIFT + PRINT QUALITY.

Changing the Menu settings

1. Press SHIFT + SEL to enter the Menu Mode.

2. Use the GROUP, ITEM and SET keys to make your changes:

> Press GROUP successively until the Group you wish to change appears in the first

column.

> Press ITEM until the Item you wish to change appears in the second column.
> Press SET until the setting you want appears in the third column.

3. Press SHIFT + SEL to exit the Menu Mode and save your settings.

NOTE
If you turn the printer off without first exiting the Menu Mode, the changes you
have made will be lost.

Operating instructions > 30

S

UMMARY OF MENU SETTINGS

The table below shows the items which may appear in the menu. Settings which are
engaged at the factory (defaults) are set in bold. Some groups or entries will only appear

when a specific emulation is engaged, as noted.

GROUP ITEM FUNCTION SETS

Printer
Control

Font Print Mode Select quality of ANK

Emulation Mode Select emulation mode. IBM PPR, EPSON FX, MLEPSON LQ, IBM PPR,

characters.

Draft mode Select the draft mode. HSD

Pitch Select character pitch. 10 CPI

Proportional
Spacing

Select whether to use
proportional spacing or
not.

ML3320ECO/
ML3321ECO

Utility

NLQ Courier
NLQ Gothic
NLQ OCR-B
Draft

SSD

12 CPI
15 CPI

17.1 CPI
20 CPI

Yes

No

ML3390ECO/
ML3391ECO

IBM AGM

LQ Courier

LQ Roman
LQ Swiss
LQ Swiss Bold
LQ Orator
LQ Gothic
LQ Prestige
LQ OCR- A
LQ OCR- B
Utility

-

Style Select either font style. Normal

Italics

Size Select the character

scale size.
Selects both double
width and double height
character or single width
and single height
characters.

Single

Double

Operating instructions > 31

GROUP ITEM FUNCTION SETS

Symbol
Sets

Character Set Select character code

table.

Language Set Select a language

character set.

ML3320ECO/
ML3321ECO

Set I

Set II

Standard (ML mode
only)
Line Graphics (ML
mode only)
Block Graphics (ML
mode only)

ASCII

French
German
British
Danish I
Swedish I
Italian
Spanish I
Japanese
Norwegian
Danish II
Spanish II
Latin American
French Canadian
Dutch
TRS80
Swedish II
Swedish III
Swedish IV
Turkish
Swiss I
Swiss II
Publisher

ML3390ECO/
ML3391ECO

Set I

Set II

ASCII

French
German
British
Danish I
Swedish I
Italian
Spanish I
Japanese
Norwegian
Danish II
Spanish II
Latin American
French Canadian
Dutch
Swedish II
Swedish III
Swedish IV
Turkish
Swiss I
Swiss II
Publisher

Zero Character Select either print font

pattern to receive a zero
character located at 30H
in ANK code.

Slashed

Unslashed

Operating instructions > 32

GROUP ITEM FUNCTION SETS

Symbol
Sets cont.

ML3320ECO/
ML3321ECO

Code Page Select a code page. USA

Canada French
Multilingual
Portugal
Norway
Turkey
Greek_437
Greek_869
Greek_928
Greek_437 CYPRUS
Polska Mazovia
Serbo Croatic I
Serbo Croatic II
ECMA-94
Hungarian CWI
Windows Greek
Windows East Europe
Windows Cyrillic
East Europe Latin II ­852
Cyrillic I-855
Cyrillic II-866
Kamenicky(MJK)
ISO Latin 2
Hebrew NC (862)
Hebrew OC
Turkey_857
Latin 5 (Windows
Turkey)
Windows Hebrew
Ukrainian
Bulgarian
ISO Latin 6 (8859/

10)
Windows Baltic
Baltic_774
KBL-Lithuanian
Cyrillic Latvia
Roman-8
Icelandic-861
Multilingual 858
ISO 8859-15
Greek_737
POL 1
Macedonian

ML3390ECO/
ML3391ECO

USA

Serbo Croatic II
Canada French
ECMA-94
Multilingual
Windows East Europe
Portugal
Windows Greek
Norway
Latin 5 (Windows
Turkey)
Baltic 774
Windows Cyrillic
East Europe Latin II­852
Cyrillic I-855
Hungarian CWI
Turkey 857
Ukranian
Cyrillic II-866
ISO Latin 6
Greek_869
Hebrew NC (862)
Kamenicky (MJK)
Hebrew OC
Greek_437
Windows Hebrew
Greek_437 CYPRUS
Windows Baltic
Turkey
Bulgarian
Polska Mazovia
Greek_928
ISO Latin 2
Serbo Croatic I

KBL-Lithuanian
Cyrillic Latvia
Roman-8
Icelandic-861
Multilingual 858
ISO 8859-15
Greek_737
Asmo 449+
Asmo 708
Arabic 864
Windows Arabic
POL1
Macedonian

Slashed Letter 0 Set whether to convert

slashed 0 located at 9BH
and 9DH in USA code
page or not.

Operating instructions > 33

Yes

No

GROUP ITEM FUNCTION SETS

ML3320ECO/
ML3321ECO

Rear Feed Line Spacing Select line feed pitch. 6 LPI

Form Tear-Off When printer is idle (0.5,

1.0 or 2.0 sec), paper is
advanced from the
current print position to
the tear position. When
data is received, paper is
moved to its original
printing position.

Skip Over
Perforation

Page Width
(Displayed only for
ML3321ECO and
ML3391ECO)

Page Length Select the length of a

Select whether to skip
over perforation or not.
(When a skip over
perforation command is
received, the received
command is given
priority.)

Change to 8” to print on
narrow paper.

continuous form.

8LPI

Off

0.5 sec

1.0 sec

2.0 sec

No

Yes

345.44 mm (13.6”)

203.2 mm (8”)

279.4 mm (11”)

296.3 mm (11 2/3”)

304.8 mm (12”)

355.6 mm (14”)

431.8 mm (17”)

76.2 mm (3”)

82.6 mm (3.25”)

88.9 mm (3.5”)

101.6 mm (4”)

127.0 mm (5”)

139.7 mm (5.5”)

152.4 mm (6”)

177.8 mm (7”)

203.2 mm (8”)

215.9 mm (8.5”)

ML3390ECO/
ML3391ECO

Operating instructions > 34

GROUP ITEM FUNCTION SETS

Bottom
Feed

ML3320ECO/
ML3321ECO

Line Spacing Select line feed pitch. 6 LPI

Form Tear -Off When printer is idle (0.5,

1.0 or 2.0 sec), paper is
advanced from the
current print position to
the tear position. When
data is received, paper is
moved to its original
printing position.

Skip Over
Perforation

Page width
(Displayed only for
ML3321ECO/
ML3391ECO)

Page Length Select the length of a

Select whether to skip
over perforation or not.
(When a skip over
perforation command is
received, the received
command is given
priority.)

Change to 8” to print on
narrow paper.

continuous form.

8 LPI

Off

0.5 sec

1.0 sec

2.0 sec

No

Yes

345.44 mm (13.6”)

203.2 mm (8”)

279.4 mm (11”)

296.3 mm (11 2/3”)

304.8 mm (12”)

355.6 mm (14”)

431.8 mm (17”)

76.2 mm (3”)

82.6 mm (3.25”)

88.9 mm (3.5”)

101.6 mm (4”)

127.0 mm (5”)

139.7 mm (5.5”)

152.4 mm (6”)

177.8 mm (7”)

203.2 mm (8”)

215.9 mm (8.5”)

ML3390ECO/
ML3391ECO

Operating instructions > 35

GROUP ITEM FUNCTION SETS

ML3320ECO/
ML3321ECO

Top Feed Line Spacing Select line feed pitch. 6 LPI

Form Tear -Off When printer is idle (0.5,

1.0 or 2.0 sec), paper is
advanced from the
current print position to
the tear position. When
data is received, paper is
moved to its original
printing position.

Bottom Margin Change to Invalid if you

want the printer to
ignore the bottom
margin setting.

Page width
(Displayed only for
ML3321ECO/
ML3391ECO)

Page Length Select the page length of

Change to 8” to print on
narrow paper.

cut sheet.

8 LPI

Off

0.5 sec

1.0 sec

2.0 sec

Valid

Invalid

345.44 mm (13.6”)

203.2 mm (8”)

279.4 mm (11”)

296.3 mm (11 2/3”)

304.8 mm (12”)

355.6 mm (14”)

420.9 mm (16.57”)

76.2 mm (3”)

82.6 mm (3.25”)

88.9 mm (3.5”)

101.6 mm (4”)

127.0 mm (5”)

139.7 mm (5.5”)

152.4 mm (6”)

177.8 mm (7”)

203.2 mm (8”)

215.9 mm (8.5”)

ML3390ECO/
ML3391ECO

Wait Time Select the waiting time

between setting paper
on the tray and feeding
it while the printer is
waiting for paper to be
fed in cut sheet manual
feed mode.

Paper Length
Control

Set-up Graphics Select the printing

7 or 8 Bits
Graphics
(Displayed only for
ML Emulation)

Control the page length
of cut sheet.

direction when double­height print data exists
in a line.

Select to change
graphics settings.

0.5 sec

1.0 sec

2.0 sec

by MENU setting

by Actual Page
Length

Uni-directional

Bi-directional

7

8

by MENU setting

by Actual Page
Length

-

Operating instructions > 36

GROUP ITEM FUNCTION SETS

Set-up
cont.

Receive Buffer
Size

Paper Out
Override

Print Registration Change the setting as

7 or 8 Bits Data
Word

Operator Panel
Function

Select size of the
received buffer.

When “1 Line” is
selected, the receive
buffer size is set to 2 k
bytes.

Senses when less than
1” (25mm) of paper
remains and stops
printing. Change to YES
to override the sensor
and print closer to the
bottom of the page.

required to obtain the
best registration for bi­directional printing.

Select data word
lengths.

Select full or limited
operation. Change to
Limited Operation to
deactivate the PRINT
QUALITY and
CHARACTER PITCH
buttons, so that these
features can only be
controlled through your
software. This prevents
these being changed
from the control panel
when several people are
using the printer.

ML3320ECO/
ML3321ECO

1 Line
32 K

64 K

128 K

Yes

No

0.25mm Right, 0.20mm Right, 0.15mm Right,

0.10mm, Right, 0.05mm, Right, 0, 0.05mm
Left, 0.10mm Left, 0.15mm Left, 0.20mm
Left, 0.25mm Left

7

8

Full Operation

Limited Operation

ML3390ECO/
ML3391ECO

-

Reset Inhibit Changing this to Yes

prevents a reset signal
from the computer from
resetting the printer to
its defaults.

Print Suppress
Effective

Auto LF Select whether to

Auto CR
(Displayed only for
IBM emulation)

Select whether to enable
or disable a print
suppress setup
command.

perform auto LF
operation or not upon
receiving a CR code. If
your print out is
consistently double
spaced, select No, if it
overprints, select Yes.

Select Yes to add a
carriage return when a
Line Feed is received at
the end of a line.

No

Yes

No

Yes

No

Yes

No

Yes

Operating instructions > 37

GROUP ITEM FUNCTION SETS

Set-up
cont.

ML3320ECO/
ML3321ECO

CSF Bin Select Appears only when the

Print DEL Code
(Displayed only for
ML Emulation)

SI Select Pitch (10
CPI) (Displayed
only for IBM
emulation)

SI Select Pitch (12
CPI) (Displayed
only for IBM
emulation)

Time Out Print Select valid or invalid. Invalid

Auto Select Determines whether or

optional Dual-Bin cut
Sheet Feeder is
installed. Use this to
switch to Bin 2 as the
default.

Change the setting to
Yes to print the DEL
code (decimal 27) as a
solid box.

Select how to handle an
SI command received in
10 CPI mode.

Select how to handle an
SI command received in
12 CPI mode.

not the printer will
automatically be
selected after you load
in paper. Select No if
you want to set the Top
of Form position.

Bin 1

Bin 2

No

Yes

17.1 CPI

15 CPI

12 CPI

20 CPI

Valid

Yes

No

ML3390ECO/
ML3391ECO

-

Graphics Speed Change to High for

Centering Position Used to limit printhead

CSF Type To avoid paper jams,

ESC SI Pitch
(Displayed only for
IBM emulation)

faster printing when the
optimum print quality is
not an issue.

travel when printing
narrow columns. Select
Mode 1 for the narrow
carriage printer. Select
Mode 1 or Mode 2 for
the wide carriage
printer.

change the setting to
Narrow if you are using
the optional Cut-Sheet
Feeder on the wide
model (ML3321 and
ML3391)

Sets the character pitch
used when the ESC SI
command is received.

High

Low

DEFAULT

Mode 1
Mode 2

Wide

Narrow

17.1 CPI

20 CPI

Operating instructions > 38

GROUP ITEM FUNCTION SETS

Set-up
cont.

Select Language
Set

Power Saving Change to disable if you

Power Save Time Sets the interval the

Enable/disable the
combination of the code
page setting and the
language conversion.
Combined: Enable the
combination of the code
page and the language
conversion.

Code Page Only: Enable
the code page only and
suppress the language
conversion.

Changing the language
set replaces certain
standard symbols with
special characters used
in foreign languages.

wish to prevent the
printer from entering the
Power Save mode after
the selected interval.

printer waits for more
data before it goes onto
the power save mode.
Power Saving must be
set to Enable (default)
for this to be effective.

ML3320ECO/
ML3321ECO

Combined

Code Page Only

Enable

Disable

5 min

10 min
15 min
30 min
60 min

ML3390ECO/
ML3391ECO

Parallel
I/F

Time Out FF It will feed or eject

paper if no data is
received during a set
period of time.

I-prime Select whether to print

or clear buffer contents
upon initialisation by
receiving I-PRIME.

Auto Feed XT
(Displayed only for
EPSON emulation)

Bi-direction Set whether to return a

If your system uses pin
14 of the parallel
interface to control
automatic line feed,
change the setting to
Valid.

device ID or not in
accordance with
IEEE1284.

Invalid

200ms
500ms
1 sec

Invalid

Buffer Print

Buffer Clear

Valid

Invalid

Enable

Disable

Operating instructions > 39

GROUP ITEM FUNCTION SETS

Serial I/F
(Displ­ayed
when
connec­ted to
Serial
Interface)

Parity None: Absence of parity

Serial Data 7/8
Bits

Protocol Select an I/F Busy

Diagnostic Test Select to perform input/

Busy Line Select to set the Busy

Baud Rate Select to set the Baud

bit
Odd: Odd parity
Even: Even parity
Ignore: Do not convert
the character to ox40 in
case of parity error.

Select Serial bit. 8 Bits

control method.

output diagnosis of
RS-232C interface
signals.

Line.

Rate.

ML3320ECO/
ML3321ECO

None

Odd
Even
Ignore

7 Bits

Ready/Busy

X-On/X-OFF
Ready/Busy & X-ON/X-OFF

No

Yes

SSD-

SSD+
DTR
RTS

9,600 bps

4,800 bps
2,400 bps
1,200 bps
600 bps
300 bps
19,200 bps

ML3390ECO/
ML3391ECO

DSR Signal Select the DSR Signal. Valid

DTR Signal Select a method to

switch a DTR signal of a
serial interface.

Busy Time Select the minimum

time between BUSY to
READY.

Invalid

Ready on Power UP

Ready on Select

0.2 sec

1.0 sec

Operating instructions > 40

GROUP ITEM FUNCTION SETS

CSF Bin 1
(Display-

ed when
Single-bin
Cut-sheet
feeder is
installed)

ML3320ECO/
ML3321ECO

Line spacing Select line feed pitch 6 LPI

Bottom Margin Change to Invalid if you

want the printer to
ignore the bottom
margin setting.

Page Width
(Displayed only for
ML3321ECO/
ML3391ECO)

Page Length Select the length of cut

Change to 8 inch to print
on letter size paper.

sheet.

8 LPI

Valid

Invalid

203.2 mm (8”)

345.44 mm (13.6”)

279.4 mm (11”)

296.3 mm (11 2/3”)

304.8 mm (12”)

355.6 mm (14”)

420.9 mm (16.57”)

88.9 mm (3.5”)

101.6 mm (4”)

127.0 mm (5”)

139.7 mm (5.5”)

152.4 mm (6”)

177.8 mm (7”)

203.2 mm (8”)

215.9 mm (8.5”)

ML3390ECO/
ML3391ECO

CSF Bin
2(Display

-ed when
Double­bin Cut­sheet
feeder is
installed)

Line Spacing Select line feed pitch. 6LPI

8LPI

Bottom Margin Change to Invalid if you

want the printer to
ignore the bottom
margin setting.

Page Length Select the length of cut

sheet.

Valid

Invalid

279.4 mm (11”)

296.3 mm (11 2/3”)

304.8 mm (12”)

355.6 mm (14”)

420.9 mm (16.57”)

88.9 mm (3.5”)

101.6 mm (4”)

127.0 mm (5”)

139.7 mm (5.5”)

152.4 mm (6”)

177.8 mm (7”)

203.2 mm (8”)

215.9 mm (8.5”)

Operating instructions > 41

M

AINTENANCE

R

EPLACING THE RIBBON CARTRIDGE

When the printer image becomes faint or incomplete, replace the ribbon cartridge.

CAUTION!

Only use genuine original consumables to ensure the best quality
and performance from your hardware. Non original products may
damage your printer’s performance and invalidate your warranty.

WARNING!

Do not change the ribbon cartridge with the power switch set to
ON.

1. Make sure the printer is turned OFF.

2. Centre the printhead (1).

1

CAUTION!

The printhead may be HOT!

3. Remove and discard the used ribbon cartridge in accordance with your local

guidelines.

Maintenance > 42

4. Unpack the new ribbon cartridge.

5. Install the new ribbon cartridge.

6. Turn the knob (1) in the direction of the arrow to take up any ribbon slack.

1

CAUTION!

Do not turn the knob anticlockwise as the ribbon might jam.

Maintenance > 43

C

LEANING YOUR PRINTER

To keep your printer in good operating condition, you are advised to clean it regularly.

WARNING!

Set the printer Power Switch to OFF and disconnect the power
cable from the printer before cleaning the printer.

P

RINTER EXTERIOR

CAUTION!

Keep the access cover closed to avoid the possibility of detergent
entering the printer.

Clean the exterior of the printer as required, but at least every six months or 300 hours of
operation, whichever comes first.

> Moisten a piece of cotton cloth with diluted neutral detergent and carefully wipe the

printer exterior.

C

LEANING THE HOUSING

WARNING!

As the print head becomes hot during printing, allow it to cool
before carrying out any cleaning inside the printer.

Do not use any flammable solvents for cleaning the printer to avoid
any risk of fire or electric shock.

You should clean the printer every six months (or after about 300 hours of operation),
whichever comes first.

NOTE
Never use solvents or strong detergents on the cabinet: they could damage
the housing.

1. Turn the printer off, and remove any paper from the path.

2. Open the access cover, remove the pull-up roller assembly.

Maintenance > 44

3. Use a clean, dry cloth to dust around the carriage shaft and platen. Remove any
loose pieces of paper.

CAUTION!

> When you clean the interior of the printer with a vacuum cleaner,

do not attempt to clean any parts smaller than the suction nozzle.

> Do not clean any interior working parts with the suction nozzle to

avoid possible damage to the printer.

4. Reinstall the pull-up roller assembly, and close the access cover.

Maintenance > 45

I

NSTALLING OPTIONS

The following options are available for your printer. Installation instructions are supplied
with the accessories.

> LAN7120E3 100BASE-TX/10BASE-T-Network Interface
> RS-232C Serial Interface
> Cut-sheet Feeder Single Bin
> Cut-sheet Feeder Dual Bin (for ML3320ECO and ML3390ECO only)
> Roll Paper Stand (for ML3320ECO and ML3390ECO only)
> Push Tractor (bottom)
> Pull Tractor

Installing options > 46

T

ROUBLESHOOTING

C

LEARING PAPER JAMS

R

EAR-FEED JAMS

1. Turn the printer OFF and use the platen knob to back the paper all the way out.

2. Open the access cover, and remove the pull-up roller assembly.

3. Remove any torn pieces of paper.

4. Replace the pull-up roller assembly, and close the access cover.

5. Reload paper.

Troubleshooting > 47

6. Turn the printer on.

7. Press FF/LOAD.

C

ORRECTING REPETITIVE REAR-FEED JAMS

If the paper keeps jamming, you probably have bits of paper stuck in the paper path.

1. Perform steps 1. through 3. under "Rear-feed jams".”

2. Grasp the paper separator (1), lift it slightly, pull back on it, then swing it forward.

1

3. Fold some continuous-form paper over three times to make a page four sheets thick,
load it on the tractors and close the covers.

Troubleshooting > 48

4. Swing the paper separator over, and use the platen knob to draw the quadruple­thick page around the platen: this brings out any jammed bits of paper.

5. Remove the paper pieces, and use the platen knob to back the paper out.

6. Swing the paper separator over, reload regular paper, and lower the paper separator

back into place.

7. Replace the pull-up roller assembly, and close the access cover.

8. Turn the printer on.

Troubleshooting > 49

9. Press FF/LOAD.

S

INGLE-SHEET JAMS

1. Turn the printer off.

2. Use the platen knob to back the jammed paper out.

3. Open the access cover and remove the pull-up roller assembly.

4. Remove any torn pieces from around the carriage.

5. Reinstall the pull-up roller assembly, and close the access cover.

6. Turn the printer on and reload paper.

Troubleshooting > 50

R

ESPONDING TO GENERAL PROBLEMS

PROBLEM SOLUTION

Nothing happens when I
turn on the printer.

The printer does not
print when data is sent.

I'm getting strange
symbols, incorrect fonts,
etc., when I try to print
a document.

I've installed a new
ribbon and the printing
is smeared and
streaked.

The ALARM light is on
and the Character Pitch
15 light is flashing.

Check the power cable connection the outlet and to
your printer. If you are using a power strip, make
sure it is turned on, and that the fuse has not blown
nor the circuit breaker tripped.

1. Is the SEL light on? If not, press the SEL key.

2. Check that the interface cable is securely
connected to both the computer and the printer.

3. If you have the optional serial interface board
installed, check to be sure that it is firmly seated in
the printer.

1. Check to be sure that the printer driver you have
selected in your software matches the printer
emulation. (Press SHIFT and SEL keys, then press
GROUP key: this will print a line showing the
emulation you have selected.)

2. If you have embedded any printer commands in
your software, check to be sure that you entered
them correctly.

The ribbon shield is either loose or missing. Remove
the ribbon cartridge and check the clear plastic
ribbon shield: if it's loose, secure it in place, if it is
missing, find it and reinstall it.

This indicates a paper jam. Press the SEL key and
correct the paper jam situation (“Clearing paper

jams” on page 47).

TheALARM light is on
and the Character Pitch
10 light is flashing.

The ALARM light is
blinking.

The printer needs paper,
but the ALARM light is
not on and I can't load
the paper.

My word processor files
don't print the way I
have the menu and front
panel set.

The Print Quality and
Character Pitch keys on
the front panel won't
work.

This indicates that the paper lever is set at the wrong
position for the paper you are trying to use: move it
to the proper setting.

Try turning the printer off and then back on again. If
the light still blinks, call for service.

Press and release the SEL key, then hold the SHIFT
key and press the RESET (CHARACTER PITCH) key:
this resets the printer.

Before sending a file to the printer, many word
processors send either an “initialization string” or an
I-Prime signal to the printer.

The initialization string contains codes that override
the panel and menu settings. To change your printer
to ignore the reset code, enter the Menu Mode, go
down to the Set-Up group and change the setting for
Reset Inhibit to Yes (“Changing the Menu settings” on

page 30).

The I-Prime signal will automatically override any
front panel settings you have made. To eliminate this
problem, enter the Menu Mode, go down to the
Parallel Interface group and change the setting for I
Prime to Invalid (“Changing the Menu settings” on

page 30).

The Operator Panel Function in the printer menu can
be used to disable these buttons. If the printer is part
of a customized system or if it is used by a number of
people, the system manager may have used this
option to make sure the printer is always set
properly.

Troubleshooting > 51

PROBLEM SOLUTION

Continuous-form paper
is sticking to the paper
separator.

Ink smears on paper. This may be caused by excessive printhead travel

In cold dry weather, static charges can build up and
make the paper cling to the paper separator. Try
moving the paper guides together so that the paper
rests on the guides rather than on the separator.

from the centring position when printing narrow
columns. Set Centring Position to MODE 1. On
ML3321ECO/ML3391ECO also try MODE 2.

Troubleshooting > 52

S

PECIFICATIONS

MODEL MODEL NUMBER

ML3320ECO D22800B

ML3321ECO D22810B

ML3390ECO D22820B

ML3391ECO D22830B

ITEM SPECIFICATION

Print Method Impact dot matrix

Printhead
ML3320ECO/ML3321ECO
ML3390ECO/ML3391ECO

Dimensions (W x D x H)
(Without platen knob,
acoustic cover and paper
separator)

ML3320ECO/ML3390ECO
ML3321ECO/ML3391ECO

Weight
ML3320ECO/ML3390ECO
ML3321ECO
ML3391ECO

Power Rating
Voltage
Frequency

Power Consumption
(Without options attached)

ML3320ECO/ML3321ECO

Operation
Powersave mode

ML3390ECO/ML3391ECO

Operation
Powersave mode

9 pins, 0.34 mm diameter, thermal protection
24 pins, 0.20 mm diameter, thermal protection

398 x 345 x 116 mm
552 x 345 x 116 mm

5.8 kg

7.6 kg

7.7 kg

220 - 240V
50/60 Hz

Typ. 36W (ISO/IEC10561/Letter/Draft/Range 1)
Max. 2.0W

Typ. 35W (ISO/IEC10561/Letter/Draft/Range 1)
Max. 2.0W

± 10%

± 2%

Environmental Requirements Operating Temperature: 5 to 35C

Storage Temperature: -10 to +50C
Operating Humidity: 20 to 80%RH (max. wet bulb temp. 30C)
Storage Humidity: 5 to 95%RH (max. wet bulb temp. 40C)

Noise Level The acoustic noise of this product is less than 57dB(A) as

measured in accordance with EN ISO7779

Specifications subject to change without notice.

Specifications > 53

I

NDEX

D

DIPUS.................................... 13

button setup utility........... 13

menu setup utility ............ 13

status monitor .................. 13

TOF setup utility ............... 14

I

Identifying component

parts

.....................................9

Installing options .................. 46

Interfaces.............................. 12

Introduction ............................7

L

Loading paper ....................... 15

continuous forms.............. 15

single sheets..................... 17

M

Maintenance

cleaning your printer
replacing the ribbon

cartridge

Menu

entering and exiting

Menu mode ........................... 29

Menu Settings ....................... 30

Menu settings........................ 31

......................... 42

........ 44

......... 30

U

user guide

list

...................................... 7

printing............................... 8

O

Operating instructions........... 25

P

Powering off your printer ...... 11

Powering on your printer ......10

Printer connections ............... 12

Printer drivers ....................... 12

Printer’s features

forms tear-off

paper park ........................ 24

tear................................... 23

................... 23

S

Selecting an emulation ......... 21

Self test

ASCII test

font sample test ............... 21

Setting the printhead gap..... 20

Setting the top of form ......... 19

Specifications ........................ 53

switching OFF........................ 11

Switching paper paths .......... 20

......................... 21

T

Top of form

changing the top of form

setting

............................ 19

resetting the top of form to

the standard setting

Tractor terms ........................ 15

Troubleshooting

clearing paper jams
responding to general

problems

........................ 51

.......20

.......... 47

Index > 54

OKI

Oki Systems (UK) Limited

550 Dundee Road
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Tel:[phone]
Fax:[phone]
http://www.oki.co.uk

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Fax:[phone]
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Technical Support for all Ireland:
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s.r.o.

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[e-mail]

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Atención al cliente: 902 36 00 36
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CONTACT DETAILS

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44-50 Av. du Général de Gaulle
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Télécopie:[phone]
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Capital Square
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7th Floor
H-1133 Budapest,
Váci út 76
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OKI Systems (Italia) S.p.A.

via Milano, 11,
20084 Lacchiarella (MI)

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OKI Printing Solutions

Platinium Business Park II, 3rd Floor
ul. Domaniewska 42
02-672 Warsaw
Poland

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E-mail: [e-mail]
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Oki Systems (Ibérica) S.A.

Sucursal Portugal
Edifício Prime ­Av. Quinta Grande 53
7º C Alfragide
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Portugal

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E-mail : [e-mail]

Oki Service
Serviço de apoio técnico ao
Cliente

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OKI Europe Ltd. (Russia)

Office 702, Bldg 1
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117152, Moscow

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Fax: [phone]
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Technical support:
Tel: [phone]
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Oki Systems (Österreich)

Campus 21
Businesszentrum Wien Sued
Liebermannstrasse A02 603
22345 Brun am Gebirge

Tel: [phone]
Drucker Support:
[phone]-501
Fax Support:
[phone]-502
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OKI Europe Ltd. (Ukraine)

Raisy Opkinoy Street,8
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Ukraine

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OKI Sistem ve Yazıcı Çözümleri Tic.
Ltd. Şti.

Harman sok Duran Is Merkezi,
No:4, Kat:6,
34394, Levent
İstanbul

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Faks: [phone]
Web: www.oki.com.tr
www.okiprintingsolutions.com.tr

Oki Systems (Belgium)

Medialaan 24
1800 Vilvoorde

Helpdesk: 02-2574620
Fax: [phone]
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AlphaLink Bulgaria Ltd.

2 Kukush Str.
Building "Antim Tower", fl. 6
1463 Sofia, Bulgaria

tel: [phone]
fax: [phone]
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OKI Printing Solutions

Herstedøstervej 27
2620 Albertslund
Danmark

Adm.: [phone]
Hotline: [phone]
Salg: [phone]
Fax: [phone]
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Oki Systems (Finland) Oy

Polaris Capella
Vänrikinkuja 3
02600 Espoo

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Oki Systems (Holland) b.v.

Neptunustraat 27-29
2132 JA Hoofddorp

Helpdesk: 0800 5667654
Tel:[phone]
Fax:[phone]
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nd

Floor,

Oki contact details > 55

Oki Systems (Norway) AS

Tevlingveien 23
N-1081 Oslo

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Telefax:[phone]
Ordrefax:[phone]
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General Systems S.R.L.
(Romania)

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Bucharest 1
Romania

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Var vänlig kontakta din Återförsäljare
i första hand, för konsultation. I andra
hand kontakta

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Baslerstrasse 15
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Support français [phone]
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Oki contact details > 56