Every effort has been made to ensure that the information in
this document is complete, accurate, and up-to-date. Oki
assumes no responsibility for the results of errors beyond its
control. Oki 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
Oki.
Written and produced by the Documentation Department.
Oki and Microline are registered trademarks of Oki Electric
Industry Company, Ltd.
Energy Star is a trademark of the United States En vironmental
Protection Agency .
Epson is a registered trademark of Epson America, Inc.
IBM is a registered trademark of International Business
Machines Corp.
Energy Star
As an Energy Star Partner, Oki has
determined that this product meets
the Energy Star guidelines for
energy efficiency.
Safety
Your Oki printer has been carefully designed to give you years of
safe, reliable performance. As with all electrical equipment, there
are a few basic precautions you should take to avoid hurting
yourself or damaging the printer:
•Read the setup and operating instructions in this manual
carefully. Be sure to save it for future reference.
•Read and follow all warning and instruction labels on the
printer itself.
•Unplug the printer before you clean it. Use only a damp cloth;
do not use liquid or aerosol cleaners.
•Place your printer on a firm, solid surface. If you put in on
something unsteady , it might fall and be damaged; if you place
it on a soft surface, such as a rug, sofa, or bed, the vents may
be blocked, causing it to overheat.
•To protect your printer from overheating, make sure no
openings on the printer are blocked. Do not put the printer on
or near a heat source, such as a radiator or heat register . If you
put the printer in any kind of enclosure, make sure it is well
ventilated.
•The printhead can get quite hot when it has been printing for
a length of time. Do not touch the printhead until it has had a
chance to cool off.
•Do not use your printer near water, or spill liquid of any kind
into it.
•Be certain that your power source matches the rating listed
on the back of the printer. If you are not sure, check with your
dealer or with your local power company.
•Your printer has an earthed, 3-pin plug as a safety feature,
and it will only fit into an earthed outlet. If you can not plug
it in, chances are that you have an older, non-earthed outlet;
contact an electrician to have it replaced with an earthed outlet.
Do not use an adapter to defeat the earthing.
•The outlet into which you plug your printer must remain easily
accessible at all times.
•To avoid damaging the power cable, do not put anything on it
or place it where it will be walked on. If the cable becomes
damaged or frayed, replace it immediately.
•If you are using an extension cable or power strip with the
printer, make sure that the total of the amperes required by all
the equipment on the extension is less than the extension’s
rating. Generally, the total ratings of all equipment plugged
into any one power line should not exceed 15 amperes. Don’t
exceed this unless you know that the power line your
equipment is plugged into has a rating above 15 amperes.
•Do not poke anything into the ventilation slots on the sides
of the printer; you could get a shock or cause a fire.
•Aside from the routine maintenance described in this
handbook, do not try to service the printer yourself; opening
the cover may expose you to shocks or other hazards. Do not
make any adjustments other than those outlined in the
handbook, you might cause damage requiring extensive repair
work.
•If anything happens that indicates that your printer is not
working properly or has been damaged, unplug it immediately
and contact your dealer. These are some of the things to look
for:
•The power cable or plug is frayed or damaged.
•Liquid has been spilled into the housing, or the printer
has been exposed to water.
•The printer has been dropped or its cabinet has been
damaged.
•The printer does not function normally when you are
following the operating instructions.
English
Getting to Know Your Printer
Carriage Cover Open
Access Cover
Control Panel
MENU
POWER ALARM
SEL
SEL
SHIFT
LF
FF/LOAD
Micro Feed
Down
Micro Feed
Up
GROUPEXIT
ITEM SET
MENU
Paper Lever
Carriage Cover
PRINT QUALITY
QUIETPARKTEAR
HSD
UTL
TOF
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
20 PROP
Paper Separator
On-Off Switch
Platen Knob
Control Panel
Access Cover
SEL
SEL
MENU
LF
SHIFT
FF/LOAD
Micro Feed
Down
POWER ALARM
Micro Feed
Up
GROUPEXIT
ITEM SET
MENU
PRINT QUALITY
QUIETPARKTEAR
HSD
UTL
TOF
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
20 PROP
Paper Lever
Set up for Single-Sheet FeedSet up for Rear Feed of Continuous Forms
Paper Guides
Paper
Separator
On-Off Switch
Platen Knob
Loading Paper
Loading Continuous Forms (Rear Feed)
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 pa
remove it before installing rear-feed paper.
Tractor Terms
Tractor Cover
per in the paper path, be sure to
Lock Lever
Pins
1. Move the paper lever to the position marked “REAR.”3. Pull up on the lock levers and open the tractor covers.
2. Grasp the paper separator, lift it slightly, pull back on it,
then swing it forward.
4. Move the right tractor over to fit the width of the paper.
PRINT QUALITY
QUIETPARKTEAR
HSD
SET
UTL
TOF
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
LF
FF/LOAD
Micro Feed
Down
TEA
Micro
20 PROP
5. Place the first two holes in the paper o ver the tractor pins
on either side and close the tractor covers.
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 (➊)
on the pull-up roller assembly (➋).
➊
6. Move the left tractor to align the edge of the paper with
the appropriate reference mark (➊), and push back the
lock lever.
➊
➋
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, see page 9.
QUIETPARKTEAR
FF/LOAD
LF
SEL
SEL
POWER ALARM
MENU
GROUPEXIT
ITEM SET
PRINT
MENU
SHIFT
TOF
Micro Feed
Up
Micro Feed
Down
PRINT QUALITY
CHARACTER PITCH
HSD
NLQ
UTL
SSD
10 12 15
17
20 PROP
Loading Single Sheets (Top Feed)
Use the single-sheet path for letterhead stationery, memos,
and individual envelopes. It is recommended for printing
graphs and charts because it provides the most accurate control
of the paper.
3. Open the carriage cover and lift the paper separator to the
single-sheet position.
Note:If you have continuous-f orm paper in the path, press
the PARK button to remov e 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.”
SEL
SEL
MENU
LF
SHIFT
FF/LOAD
Micro Feed
Down
POWER ALARM
Micro Feed
PRINT QUALITY
Up
GROUPEXIT
ITEM SET
QUIETPARKTEAR
HSD
UTL
TOF
MENU
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
20 PROP
4. Make sure the wire feed guide ( ➊) is in the paper separator.
➊
5. Adjust the paper feed guides (➊) for the width of the
QUIETPARKTEAR
FF/LOAD
LF
SEL
SEL
POWERALARM
MENU
GROUPEXIT
ITEMSET
PRINT
MENU
SHIFTTOF
Micro Feed
Up
Micro Feed
Down
paper and place a sheet of paper in the separator. The
paper will feed into the printer.
Setting the Top of Form (TOF)
When setting the Top of Form, use the red line (➊) on the
paper shield as a reference:
➊
SEL
SEL
MENU
LF
SHIFT
FF/LOAD
Micro Feed
Down
POWER ALARM
Micro Feed
PRINT QUALITY
Up
GROUPEXIT
ITEM SET
QUIETPARKTEAR
HSD
UTL
TOF
MENU
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
20 PROP
Note:The standard setting for the Top of Form ( where
the printing begins) is 2.54cm down from the top of
the page. T o chang e the setting, see the next column.
M
PARK
PRINT QUALITY
QUI
HSD
➊
1. Make sure the printer is deselected (SEL light off).
2. Press and hold SHIFT (➊), then:
☛ Press LF (➋) to move Top of Form higher on page
☛ Press FF/LOAD (➌) to move Top of Form lower on
page
➋➌➊
3. Press SEL to re-select the printer.
Resetting the Top of Form to the Standard Setting
SEL
SEL
MENU
Temporarily 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.
SEL
SEL
MENU
2. Press LF to change the position of the Top of Form.
LF
Micro Feed
Down
GROUP
Note:This setting will not apply to any following pages.
1. Turn the printer off.
2. Hold PARK + QUIET/TOF while turning the printer
back on.
SEL
SEL
MENU
POWERALARM
SHIFTTOF
LF
Micro Feed
Down
GROUPEXIT
FF/LOAD
Micro Feed
Up
ITEMSET
MENU
PRINT
QUIETPARKTEAR
Switching Paper P aths
Setting the Printhead Gap
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 lev er to the position mark ed “REAR” or
“BOT,” as appropriate.
4. Load continuous-form paper, then press FF/LOAD.
The printhead gap is the distance between the printhead and
the platen. T o adjust the gap , open the access cover and mo ve
the blue lever (➊) to the recommended setting from the table
below.
Note: It is recommended that the printer be switched off
prior to removing the access cover.
➊
MediaSetting MediaSetting
45-75g/m² paper12-part form (w/carbon)3-4
75-90g/m² bond paper23-part form (w/carbon)4-5
Labels3-44-part form (w/carbon)5
Envelopes5
Running the Self T ests
QUIETPARKTEAR
FF/LOAD
LF
SEL
SEL
POWERALARM
MENU
GROUPEXIT
ITEMSET
PRINT
MENU
SHIFTTOF
Micro Feed
Up
Micro Feed
Down
Selecting an Emulation
Font Sample Test
To run the test:Turn the printer off, then press and hold
LF while turning the printer on.
LF
Micro Feed
Down
GROUP
To stop the test:If you wish to stop the test before it is
complete, press SEL.
ASCII T est
To run the test:Turn the printer off, then press and hold
QUIET while turning the printer on.
To stop the test:Press SEL.
QUIET
TOF
Your printer has three emulations:
•Epson® FX
•IBM® Proprinter III
•MICROLINE® Standard
The printer comes set for the IBM Proprinter III emulation.
To change to one of the other emulations:
1. Make sure paper is loaded.
2. Deselect the printer (SEL light off, press SEL key).
3. Press SHIFT + SEL: the printer will enter the Menu
Mode.
4. Press LF.
LF
Micro Feed
Down
GROUP
The following line will print:
Printer ControlEmulation ModeIBM PPR
Selecting a Printer Driver
Before you can use your printer with softwa re, you must enter
the software and select the correct printer driver. If you ha ve
the wrong driver selected, you will see strange characters,
incorrect fonts, etc.
5. Press TEAR consecuti v ely until the emulation you wish
to select prints in the right-hand column.
TEAR
SET
6.Press SHIFT + SEL to save your setting and exit the
Menu Mode.
SEL
SEL
MENU
POWERALARM
SHIFTTOF
LF
Micro Feed
Down
GROUPEXIT
FF/LOAD
Micro Feed
Up
ITEMSET
MENU
PRINT
QUIETPARKTEAR
Important!See your software documentation for
information on how to select a printer driver .
Printer Drivers
The drivers belo w are listed by decr easing compatibility with
your printer: use one as close to the top of the list as possible.
IBM Proprinter IIIEpson FXMicroline Standard
ML3320/1 IBMML3320/1 EpsonMicroline 320/321
IBM Proprinter IIIEpson FX286eMicroline 320/321
IBM Proprinter IIEpson FX 850/1050Microline 320/321
IBM ProprinterEpson FX 86/286Microline 292/293
IBM Graphics Printer Epson FXMicroline 192/193
Epson FX800/1000Microline 182/183
Maintenance
Replacing the Ribbon Cartridge
Note: For the best results, use genuine Oki ribbons.
1. Make sure the printer is turned OFF.
2. Centre the printhead (➊).
Caution! The printhead may be HOT!
M
3. Remove and discard the used ribbon cartridge.
➊
4. Unpack the new ribbon cartridge.
5. Install the new ribbon cartridge.
6. Turn the knob ( ➊) in the direction of the arrow to take up
any ribbon slack.
➊
Clearing Paper Jams
Rear-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.
6. Turn the printer on.
7. Press FF/LOAD.
FF/LOAD
Micro Feed
Up
ITEM
Correcting Repetitive Rear-Feed Jams
QUIETPARKTEAR
SET
PRINT
TOF
PRINT QUALITY
CHARACTER PITCH
HSD
NLQ
UTL
SSD
10 12 15
17
20 PROP
If the paper keeps jamming, you probably have bits of paper
stuck in the paper path.
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.
1. Perform steps 1 through 3 under “Rear-Feed Jams.”
2. Grasp the paper separator (➊), lift it slightly, pull back
on it, then swing it forward.
➊
4. Swing the paper separator over, and use the platen knob
SEL
SEL
MENU
LF
SHIFT
FF/LOAD
Micro Feed
Down
POWER ALARM
Micro Feed
GROUPEXIT
ITEM SET
PRINT QUALITY
Up
QUIETPARKTEAR
HSD
UTL
TOF
MENU
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
20 PROP
to draw the quadruple-thick page around the platen: this
brings out any jammed bits of paper.
FF/LOAD
ITEM
Micro Feed
Up
5. Remove the paper pieces, and use the platen knob to
back the paper out.
FF/LOAD
Micro Feed
PRINT QUALITY
Up
QUIETPARKTEAR
TEM SET
HSD
UTL
TOF
MENU
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
20 PROP
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.
9. Press FF/LOAD.
Single-Sheet Jams
QUIETPARKTEAR
FF/LOAD
LF
SEL
SEL
POWER ALARM
MENU
GROUPEXIT
ITEM SET
PRINT
MENU
SHIFT
TOF
Micro Feed
Up
Micro Feed
Down
PRINT QUALITY
CHARACTER PITCH
HSD
NLQ
UTL
SSD
10 12 15
17
20 PROP
4. Remove any torn pieces from around the carriage.
1. Turn the printer off.
2. Use the platen knob to back the jammed paper out.
SEL
SEL
MENU
LF
SHIFT
FF/LOAD
Micro Feed
Down
POWER ALARM
Micro Feed
PRINT QUALITY
Up
GROUPEXIT
ITEM SET
QUIETPARKTEAR
HSD
UTL
TOF
MENU
NLQ
PRINT
SSD
CHARACTER PITCH
10 12 15
17
20 PROP
3. Open the access cover and remove the pull-up roller
assembly.
5. Reinstall the pull-up roller assembly , and close the access
cover .
6. Turn the printer on, and reload paper.
Cleaning the Housing
You should clean the printer ev ery six months (or after about
300 hours of operation).
Note: Never use solvents or strong detergents on the cabi-
net: they could damage the housing.
1. Turn the printer of f, and remove any paper from the path.
2. Open the access cover, remove the pull-up roller
assembly.
3. Use a clean, dry cloth to dust around the carriage shaft
and platen. Remove any loose bits of paper.
4. Reinstall the pull-up roller assembly , and close the access
cover .
Troubleshooting
Problem: Nothing happens when I turn on the printer.
Solution: Check the power cable connection and power
outlet 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.
Problem: The printer does not print when data is sent.
Solutions:(1) Is the SEL light on? If not, press the SEL key.
Solution: (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 GR OUP ke y: 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.
(2) Check that the interface cable is securely
connected to both the printer and the computer.
(3) If you have the optional serial interface board
installed, check to be sure that it is firmly
seated in the printer.
Problem: I've installed a new ribbon and the printing is
smeared and streaked.
Solution: 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.
Problem: The ALARM light is on and the Character Pitch
15 light is flashing.
Problem: My word processor files don’t print the way I
have the menu and front panel set.
Solution: This indicates a paper jam. Press the SEL key and
correct the paper jam situation ( see “Clearing
Paper Jams” earlier in this manual).
Problem: The ALARM light is on and the Character Pitch
10 light is flashing.
Solution: 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.
Problem: The ALARM light is blinking.
Solution: Try turning the printer off and then back on again.
If the light still blinks, call for service.
Problem: The printer needs paper, but the ALARM light
is not on and I can’t load the paper.
Solution: Press and release the SEL key, then hold the
SHIFT key and press the RESET (CHARA CTER
PITCH) key: this resets the printer.
Solution: Before sending a file to the printer, many word
processors send either an “initialisation string” or
an I-Prime signal to the printer. The initialisation
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 (see Menu Mode later in this manual).
The I-Prime signal will automatically ov erride 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 (see Menu Mode later in
this manual).
Problem: The Print Quality and Character Pitch keys on
the front panel won’t work.
Solution: The Operator Panel Function in the printer menu
can be used to disable these buttons. If the printer
is part of a customised 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.
Problem: Continuous-form paper is sticking to the paper
separator.
Solution: 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.
Problem: Ink smears on paper.
Solution: This may be caused by excessive printhead travel
from the centring position when printing narrow
columns. Set Centring Position to MODE 1. On
ML3321 also try MODE 2. (See Menu Mode).
Using Your Printer
Print Mode: Indicator Lights
➊
SEL
FF/LOAD
SEL
MENU
POWERALARM
➌
SHIFTTOF
➎
➊ SEL .............. Glows = printer selected, ready to receive data
Flashes = printer in Print Suppress Mode
Not lit = printer deselected (can’t receive data)
➤ 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.
➏10/12/15/17/20/PROP ..... Indicate character pitch selected.
Print Mode: Control Panel Ke ys
➋
➊
➌
➍
➎
SEL
FF/LOAD
➏
LF
Micro Feed
Down
GROUPEXIT
Micro Feed
Up
ITEMSET
MENU
➐
SEL
MENU
POWERALARM
SHIFTTOF
➊ SEL ......... Selects/deselects printer. When held on power up,
engages the Menu Mode.
➋SHIFT..... Press and hold while pressing another switch to en-
gage the alternate function for that switch (e.g.
“Micro Feed Down” for the LF key).
➌ LF............ Moves paper up one line: press and hold for repeti-
tive line feeds. When held on power up, activates
the Font Test
➍ QUIET .... Turns Quiet Mode on and off. When held on power
up, activates the Rolling ASCII Test.
PRINT
PRINT QUALITY
HSD
QUIETPARKTEAR
NLQ
CHARACTER PITCH
101215
17
➑
UTL
SSD
20PROP
➒
➎ PRINT QUALITY ........... Selects the print quality.
➏ FF/LOAD ......................... Loads/ejects single sheet of paper;
moves continuous-form paper to
print position.
➐ TEAR ................................ Moves continuous-form paper up
for tear-off or back down for printing.
➑ PARK ................................ Retracts continuous-form paper
from the path
➒ CHARACTER PITCH .... Selects the character pitch. Used
with the SHIFT key to reset the
printer.
Selecting the Print Quality
Important! Front panel settings for print quality and
character pitch can be overridden by software
commands. The lights will always reflect the
printer’s state.
Press PRINT QUALITY to select:
NLQ: Near Letter Quality
•Highest quality, slowest speed
•Courier or Gothic fonts
•Recommended for correspondence
UTL: Utility
•Medium quality, medium speed
•Gothic font only
•Recommended for internal documents and high-volume
data.
HSD: High Speed Draft
•Lower quality, faster speed
•Gothic font only
•Recommended for preliminary drafts.
SSD: Super Speed Draft
•Lowest quality (12 cpi only), 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 SET until DRAFT appears as the setting for the
Print Mode.
5. Press ITEM.
6. Press SET (SSD appears as the setting for the Draft
Mode).
7.Press SHIFT + SEL key to exit the Menu Mode and
save your changes.
Selecting the Character Pitch
Menu Mode: Control P anel
Pr ess CHARACTER PITCH to select the width of
characters in characters per inch:
10 cpi
•Recommended for standard text
•Not available for SSD
12 cpi
•Recommended for standard text.
•Yields more text per page.
17.1 cpi, 20 cpi
•Smallest print
•Recommended for spreadsheets
•Not available for SSD.
PROP
•Proportional spacing
•Recommended for documents where you want a more
polished appearance.
•Available only for NLQ.
➊➋➌➍
SEL
SEL
MENU
POWERALARM
SHIFTTOF
LF
Micro Feed
Down
GROUPEXIT
FF/LOAD
Micro Feed
Up
ITEMSET
MENU
PRINT
QUIETPARKTEAR
➎
➊ GROUP key ... Prints the next Group in the Menu. With the
SHIFT key, prints the previous Group.
➋ITEM key ....... Prints the next Item in the Group. With the
SHIFT key, prints the previous Item in the
Group.
➌ SET key .......... Prints the next Setting for an Item. With the
SHIFT key, prints the previous Setting for an
Item.
➍ PRINT key ..... Prints a copy of all the Menu settings. With
the SHIFT key, prints the current settings for
the Group selected.
➎MENU light.... Glows when the printer is in the Menu Mode.
Entering and Exiting the Menu Mode
Changing the Menu Settings
T o enter or e xit 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.
1. Press SHIFT + SEL to enter the Menu Mode.
2. Use the GROUP, ITEM and SET keys to make your
changes:
➤P ress 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. P r ess SHIFT + SEL to exit the Menu Mode and save
your settings.
Important! If you turn the printer off without first exiting
the Menu Mode, the changes you have made
will be lost.
Summary 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
italic. Some groups or entries will only appear when a specific emulation is engaged, as noted.
Symbol SetsCharacter SetSet I, Set II, Standard*, Line Graphics*, Block Graphics*
Language SetASCII, French, German, British, Danish I, Swedish I, Swedish II, Swedish III,
Swedish IV, Italian, Spanish I, Japanese, Norwegian, Danish II, Spanish II,
Latin American, French Canadian, Dutch, TRS 80, Turkish, Swiss I, Swiss II, Publisher
Zero CharacterSlashed, Unslashed
Code PageUSA, 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 II-852, Cyrillic I-855, Hungarian CWI, Turkey 857,
Ukrainian, 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
Slashed Letter ONo, Yes
* Appears only when the MICROLINE Standard emulation is selected.
GroupItemSettings
Rear FeedLine Spacing6 LPI, 8 LPI
Form Tear-OffOff, 500 mS, 1 sec, 2 sec
Skip Over PerforationNo, Y es
Page Width (ML3321 only)13.6", 8"
Page Length11", 11-2/3", 12", 14", 17", 3", 3.5", 4", 5.5", 6", 7", 8", 8.5"
Bottom FeedLine Spacing6 LPI, 8 LPI
Form Tear-OffOff, 500 mS, 1 sec, 2 sec
Skip Over PerforationNo, Y es
Page Width (ML3321 only)13.6", 8"
Page Length11", 11-2/3", 12", 14", 17", 3", 3.5", 4", 5.5", 6", 7", 8", 8.5"
7 or 8 Bit Graphics*8, 7
Receive Buffer Size1 Line, 16K, 28K
Paper Out OverrideNo, Y es
Print Registration0.25 mm Right, 0.20 mm Right, 0.15 mm Right, 0.10 mm Right, 0.05 mm Right, 0,
0.05 mm Left, 0.10 mm Left, 0.15 mm Left, 0.15 mm Left, 0.15 mm Left
7 or 8 Bits Data Word*8, 7
* Appears only when the MICROLINE Standard emulation is selected.
* Appears only when the MICROLINE Standard emulation is selected.
+
Appears only when the IBM emulation is selected.
** Applies only when the Epson emulation is selected.
*** ML3321 only.
Explanations of Menu Items
7 or 8 Bits Data Word (ML). If your computer system uses
seven bits to make up each unit of data, change this setting to 7.
7 or 8 Bit Graphics. Choose the graphics your system uses:
7 or 8 dots in each column printed.
Auto CR (IBM). If you want the printer to automatically
add a carriage return when a Line Feed is received at the end
of a line, change the setting to Yes.
A uto LF. If y our printout is consistently double spaced, select
No; if it overprints, select Yes.
Auto Feed XT (Epson). If your system uses pin 14 of the
parallel interface to control automatic line feed, change the
setting to Valid.
A uto Select. If you al ways use the same Top of F orm position,
change the setting to Yes.
Bottom Margin. Change to Invalid if you want the printer
to ignore the bottom margin setting. Caution! This can cause
loss of data and damage the printhead.
Centring Position. Choose DEFAULT, Mode 1 or Mode 2.
Character Set. Choose IBM Set I or IBM Set II.
Code Page. Choose the Code Page character set you wish to
use: USA (IBM 437), Canada French (IBM 863),
Multilingual (IBM 850), Portugal (IBM 860), Norway (IBM
865), BRASC II, or Abicomp.
Draft Mode. Change to SSD if you wish to use the Super
Speed Draft mode of printing. Note: Print Mode must be set
to DRAFT for this setting to be effective.
Emulation Mode. Choose the printer emulation.
Form Tear-Off. Choose 500 mS, 1 sec, or 2 sec to turn the
Form Tear-Off feature on and to set the time interval for the
printer to wait before advancing the paper.
Graphics. Change to bidirectional graphics for faster
printing: optimise the registration using the Print Registration
menu item.
I-Prime. Determines what the printer will do when it recei ves
the I-Prime signal from the host: Buffer Print prints out the
buf fer contents before resetting; Buffer Clear dumps the b uffer
contents immediately. Invalid causes the printer to ignore
the I-Prime signal.
Language Set. Replaces certain standard symbols with
special characters used in foreign languages.
Print Registration. Change the setting as required to obtain
the best registration for bidirectional printing.
Line Spacing. Change to 8 lpi to print more lines on a page.
Operator Panel Function. Change to Limited Operation to
deactiv ate the PRINT QUALITY and CHARA CTER PITCH
buttons. This prevents these from being changed via the
control panel when multiple people are using the printer.
Page Length. Selects the length of the paper you are using.
Page Width (Model 3321 only). Change to 8" to print on
letter-size paper.
Paper Out Override. Senses when less than 1" (25 mm) of
paper remains, and stops printing. Change to Yes to override
the sensor . Caution! This can cause loss of data and damage
the printhead!
Pin 18. Sets the signal on pin 18 to +5 volts or to open.
Pitch. Choose the character width, in character per inch (cpi).
Print DEL Code (ML). Change to Yes if you wish to print
the DEL code (decimal 27) as a solid box.
Print Mode. Choose the quality and speed of printing.
Print Suppress Effective. If your system uses the DC1 and
DC3 codes for something other than the print suppress mode,
change the setting to No.
Proportional Spacing. Change the setting to Yes to engag e
proportional spacing of characters.
Receive Buffer Size. Selects the amount of memory dev oted
to holding received data. Choosing 1 Line will tie up your
computer while printing, but if you abort the print job, the
printer will stop much sooner.
Reset Inhibit. Select Yes to prevent your software from
resetting your printer's settings.
SI Select Pitch, 10 cpi (IBM). Sets the pitch to be engaged
when the printer control panel is set for 10 cpi and the SI
command is received.
SI Select Pitch, 12 cpi (IBM). Sets the pitch to be engaged
when the printer control panel is set for 12 cpi and the SI
command is received.
Size. Change to Double for double width and height printing.
Skip Over Perf oration. Change to Yes if you want the printer
QUIETPARKTEAR
FF/LOAD
LF
SEL
SEL
POWER ALARM
MENU
GROUPEXIT
ITEMSET
PRINT
MENU
SHIFTTOF
Micro Feed
Up
Micro Feed
Down
to go to the next page when it comes within 1" (25 mm) of
the bottom of the page. Keep it set to No if your software has
its own page formatting controls.
Slashed Letter O. If set to Yes, capital and lo wer case slashed
O (Ø and ø) will appear at locations 9Bh and 9Dh respectively
in USA code page. If set to No, the characters “¢” and “¥”
will appear at these locations.
Style. Change to italics if you want the printed characters to
be slanted.
Time Out Print. If your software spends a long time
processing between portions of data it feeds to the printer,
change the setting to Invalid to keep your printer from
inadvertently dumping the received data while it is waiting
for more.
Using the Printer's Features
Tear Feature
Use this feature to advance continuous-form paper up to the
tear position by simply pressing TEAR (➊).
➊
Note: The Tear Feature can not be used when the optional
pull tractor is engaged.
Forms T ear-Off Feature
W ait Time. Sets the amount of time the printer will wait for
more data before moving to the form tear-off position.
Zero Character. If you do not want the printer to use a slash
to distinguish the number zero from the capital letter O,
change the setting to Unslashed.
Important! 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 interv al
you select, then moves it back down a gain for printing when
the printer receives more data.
This feature is normally turned off. To activate it:
QUIETPARKTEAR
FF/LOAD
LF
SEL
SEL
POWERALARM
MENU
GROUPEXIT
ITEMSET
PRINT
MENU
SHIFTTOF
Micro Feed
Up
Micro Feed
Down
1. Press SHIFT (➋) + SEL (➊).
➋➍➌➊
SEL
SEL
SHIFTTOF
MENU
POWER ALARM
Micro Feed
Down
GROUPEXIT
LF
FF/LOAD
Micro Feed
Up
ITEMSET
MENU
2. Press GROUP (➌) 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 (➍) until the time interval you wish to select
appears in the third column.
4. Press SHIFT (➋) + SEL (➊) to exit Menu Mode and
save the setting.
QUIETPARKTEAR
PRINT
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.
Paper Park Feature
➊
To retract rear-feed paper from the paper path, press PARK
(➊).
ML3320: 389 x 345 x 116 mm
ML3321: 430 x 345 x 116 mm
WeightML3320: 7 Kg
ML3321: 9 Kg
ParameterRange
Operating Temperature41 to 104°F (5 to 40°C)
Storage Temperature14 to 122°F (-10 to 50°C)
Operating Humidity20 to 80% RH
Storage Humidity5 to 95% RH
Electrical Requirements240 volts ac (+10%, -14%),
50/60 Hz (±2%)
This product complies with the requirements of the Council
Directive 89/336/EEC on the approximation of the laws of
the member states relating to electromagnetic compatibility.
Specifications subject to change without notice.
Universal Serial Bus (USB)
User’s Guide
System requirements
To use your printer through the printer’s built-in USB port,
you need the following minimum requirements:
Microsoft Windows 98, ME, 2000 or XP, pre-installed on
PC equipped with a USB port; a shielded USB interface cable
long enough to reach from Series A 4-pin location (computer)
to Series B 4-pin (printer), not supplied. Microsoft Windows
NT4.0 does not support USB.
Administrator privileges are necessary for installation on
Windows 2000 and Windows XP.
CAUTION!
Under no circumstances attempt to use both
parallel and USB ports simultaneously.
The USB Cable
You will need to obtain a certified USB cable from a reputable
supplier or your Oki dealer.
A genuine cable displays the Trident symbol
connectors.
Using an inferior cable can cause printing problems and
special cables are needed for longer runs than five metres.
on both
A
USB connectors
B
Connecting the USB Cable
Due to the number of possible variants of operating systems
it is not possible to describe every combination.
Terminology may vary between Windows operating systems
and some knowledge is assumed. If you are unsure how to
proceed, you should consult your computer documentation
or system manager for details. This example uses Windows
2000 Professional.
2. With the printer facing front, the USB port is situated on
the left hand side at the rear of the printer. The small round
connector on the top of the printer is for use by the cut
sheet feeder connector (CSF).
3. Plug the B-Male connector into the USB port on the back
of the printer.
4. Plug the A-Male connector into the computer’s USB port
or into a suitable USB hub.
1. Ensure the printer and computer are easily accessible and
turn both units off. This is not strictly necessary but may
prevent any problems being caused by the accidental
dislodging of power or other cables.
USB Port
5. Switch on both the computer and printer.
6. The printer will be identified immediately by the New
Hardware Wizard and install itself in the Printer folder.
An additional item, USB Printing Support will also appear
in the Device Manager each time the printer is switched
on and connected.
Device Manager: part
listing showing active
USB connection
7. Check that the default paper size has been correctly set
by looking at the settings in the Settings > Printers folder.
Under the printer's Properties > General tab, the current
paper selection is shown. The printer picks up its initial
setting from the Locale settings on the host computer.
The paper size can be altered by using the drop down
arrow and selecting an alternatve size.
8. If the printer had formerly been used as a parallel or serial
device and there is no output from the printer once a USB
cable has been connected, check to see that the correct
port has been selected. This information can also be found
in the Properties folder but under the Ports tab. Amend as
necessary.
9. If there are printing problems, check to see whether there
is a USB connection active in the Control Panel. If there
is no USB connection shown, you must install the hub.
10. Alternatively, there may be a problem if the printer is
connected via a USB hub. Disconnect the printer cable
from the hub and connect it directly to the computer.
Installing the USB driver
Note: Installation of the Oki USB driver is only required for
Windows 98. You may be called upon for your original
Windows 98 CD. Please have this available.
1. After the [Add New Hardware Wizard] window appears,
click on [Next].
2. Select [Search for the best driver for my device
(Recommended)] and click on [Next].
3. Insert the printer software CD-ROM disk into drive. Make
sure the CD-ROM drive is checked and click on [Next].
After Windows finds the USB driver, click on [Next].
If Windows cannot automatically find the correct directory
for some reason, select the second option,
Display a list of all the drivers in a specific location . . .
Select the directory on the CD where the drivers are
located. On the Oki CD they are situated in
X:\Drivers\WinVer\CodePage where X: is CD drive letter;
WinVer is the Windows versions, and CodePage is the
selected option from Windows ANSI, Win Baltic, Win
Eastern European, Win Cyrillic, Win Greek, or Win Hebrew.
4. After files have finished copying, click on [Finish].
If the [Add New Hardware Wizard] window appears again,
click on [Cancel] and restart the computer.