Oki Printer ML5520 User Manual

ML5520/21  
users guide  
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PREFACE  
Every effort has been made to ensure that the information in this  
document is complete, accurate, and up-to-date. The manufacturer  
assumes no responsibility for the results of errors beyond its control.  
The manufacturer also cannot guarantee that changes in software and  
equipment made by other manufacturers and referred to in this guide  
will not affect the applicability of the information in it. Mention of  
software products manufactured by other companies does not  
necessarily constitute endorsement by the manufacturer.  
While all reasonable efforts have been made to make this document  
as accurate and helpful as possible, we make no warranty of any kind,  
expressed or implied, as to the accuracy or completeness of the  
information contained herein.  
The most up-to-date drivers and manuals are available from the Oki  
Copyright © 2003. All rights reserved.  
Energy Star is a trademark of the United States Environmental  
Protection Agency.  
Oki and Microline are registered trademarks of Oki Electric Industry  
Company, Ltd.  
Hewlett-Packard, HP, and LaserJet are registered trademarks of  
Hewlett-Packard Company.  
Microsoft, MS-DOS and Windows are registered trademarks of  
Microsoft Corporation.  
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 89/336/EEC (EMC) and 73/23/EEC  
(LVD) as amended where applicable on the  
approximation of the laws of the member states relating  
to electromagnetic compatibility and low voltage.  
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CONTENTS  
Printhead Gap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24  
Print Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25  
Character Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26  
Epson and IBM Emulations. . . . . . . . . . . . . . . . . . . . . . . 26  
Printer Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27  
Emulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27  
Menu Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28  
Menu Mode Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28  
Entering and Exiting Menu Mode . . . . . . . . . . . . . . . . . . 29  
Resetting the Menu to the Factory Defaults . . . . . . . . . 29  
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Loading Paper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44  
Single Sheet Paper Jams . . . . . . . . . . . . . . . . . . . . . . . . 60  
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80  
Ribbon Cartridge Handling. . . . . . . . . . . . . . . . . . . . . . . 83  
Power Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85  
Computer Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86  
Parallel (LPT), IEEE 1284. . . . . . . . . . . . . . . . . . . . . . . . . 86  
USB, Specification 1.1 Compliant . . . . . . . . . . . . . . . . . 86  
Loading Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87  
Testing the Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87  
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91  
Oki contact details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94  
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NOTES, CAUTIONS AND WARNINGS  
NOTE  
A note appears in this manual like this. A note provides additional  
information to supplement the main text which may help you to use and  
understand the product.  
CAUTION!  
A caution appears in this manual like this. A caution provides  
additional information which, if ignored, may result in equipment  
malfunction or damage.  
WARNING!  
A warning appears in this manual like this. A warning provides  
additional information which, if ignored, may result in a risk of  
personal injury.  
NOTES, CAUTIONS AND WARNINGS > 5  
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INTRODUCTION  
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Extremely reliable, durable operation: 20,000 hours Mean  
Time Between Failures (MTBF) at 25% duty cycle and 35%  
page density.  
>
>
Advanced paper handling, with built-in rear push tractor and  
zero-tear forms capability.  
Very high print speeds:  
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High Speed Draft (HSD) Mode: 507 cps  
Utility Mode: 380 cps  
Near Letter Quality (NLQ) Mode: 95 cps  
Super Speed Draft (SSD) Mode: 570 cps  
>
This rugged 9-pin printer can meet the needs of harsh and  
demanding environments.  
FEATURES / TIPS  
Forms Tear-Off  
The Forms Tear-Off feature allows a printed continuous forms page to  
be torn off without wasting paper or adjusting the printer.  
When printing stops, Forms Tear-Off automatically moves the paper to  
align the perforation with the tear bar (located under the access  
cover), after a time interval which you select through the menu.  
Paper remains in the tear-off position until the printer receives more  
data. Then, the paper moves back down for printing.  
This feature has to be enabled.  
Paper Park  
Your printer’s paper park feature allows you to print a single sheet  
(cut-sheet) page without removing continuous feed paper from the  
printer.  
For more information, see “Paper Park” in “Using your Printer”.  
INTRODUCTION > 6  
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Top of Form (TOF)  
Top of Form (TOF) sets the print start position. The factory default is 1"  
from the top.  
The TOF can be changed in increments of 1/144", for a single print job  
or set to a new default. The overall amount of adjustment is limited to  
avoid paper jams.  
The first line prints at the red line of the plastic paper shield (1) on the  
printhead.  
1
For more information, see “Top of Form (TOF)” in “Using your Printer”.  
NOTE  
The Forms Tear-Off and the Top of Form settings interact. For more  
information, see “Top of Form (TOF) and Forms Tear-Off” in “Using your  
Printer”.  
Turning the Platen Knob  
Always turn the printer off before turning the platen knob! If you turn  
the platen knob when the printer is on, the Top of Form will misalign.  
INTRODUCTION > 7  
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Controlling Access to the Printer  
>
You can control access to the printer by changing the setting  
for the Operator Panel Function in the Menu from Full  
Operation (the factory default) to Limited Operation.  
>
When Limited Operation is selected, the PRINT QUALITY and  
CHARACTER PITCH keys dont work. This prevents these  
settings from being changed from the control panel when  
several people are using the printer.  
For more information, see Changing the Menu Settingsin Using your  
Printer.  
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PRINTER DRIVERS  
EMULATIONS  
The factory default emulation for your printer is IBM PPR.  
If you wish to change to one of the Epson or Microline emulations, see  
Using your Printer.  
PRINTER DRIVERS  
The Oki driver for your printer is provided on the CD included with the  
printer. You can either load the Oki driver or select one of the  
compatible drivers listed below in your software application.  
1.  
Insert the CD into your CD-ROM drive.  
NOTE  
If the CD does not AutoPlay, click Start Run Browse, then browse  
to your CD-ROM drive, double-click Install.exe and click OK.  
2.  
3.  
Select your Language.  
When the Menu Installer window appears, click the Driver  
Installation button.  
4.  
Follow the on-screen instructions.  
INSTALLING THE 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.  
2.  
When the [Add Printer] window appears, click [Next].  
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;  
PRINTER DRIVERS > 9  
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WinVer is the Windows versions, and CodePage is the selected  
option.  
NOTE  
To find out more about Code pages, see Help on the Oki CD Browser.  
3.  
4.  
After files have finished copying, click [Finish].  
Switch your printer ON.  
USING A COMPATIBLE DRIVER  
The drivers below are listed by decreasing compatibility with your  
printer. Use one as close to the top of the list as possible.  
IBM Proprinter III  
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IBM Proprinter III factory setting  
IBM Proprinter II  
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IBM Proprinter  
Epson FX  
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Epson FX 286e  
Epson FX 850/1050  
Epson FX 800/1000  
INTERFACES - GENERAL  
Your printer is equipped with a selection of data interfaces:  
Under no circumstances attempt to use both parallel and USB ports  
simultaneously.  
1.  
Parallel For direct connection to a PC. This port requires a  
bi-directional (IEEE 1284 compliant) parallel cable.  
2.  
USB For connection to a PC running Windows 98 or above  
(not Windows 95 upgraded to Windows 98) or Macintosh.  
Windows NT 4.0 does not support USB. Administrator  
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privileges are necessary for Windows 2000 and Windows XP  
installations.  
This port requires a cable conforming to USB version 1.1 or  
above. A genuine cable displays the Trident symbol on both  
connectors.  
Using an inferior cable can cause printing problems and  
special cables are needed for longer runs than five metres.  
The operation of a printer is not assured if a USB compatible  
device is connected concurrently with other USB compatible  
machines.  
When connecting multiple printers of the same type, they  
appear as *****, ***** (2), ***** (3), etc. These numbers  
depend on the order of connecting or turning on each printer.  
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.  
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.  
2.  
Plug the Series A male connector (a) into  
the the computers USB port or into a  
suitable USB hub.  
b
3.  
4.  
Plug the Series B Male connector (b) into  
the printers USB port.  
a
Switch on both the computer and printer.  
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5.  
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.  
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 alternative size.  
7.  
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.  
8.  
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.  
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.  
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USING YOUR PRINTER  
COMPONENTS: REAR FEED (CONTINUOUS FORMS)  
The serial number of your printer is on a label fixed to the back of the  
printer.  
1
7
6
2
3
5
4
1. Sheet Guide  
2. Paper Lever  
3. ON-OFF Switch  
4. Platen Knob  
5. Control Panel  
6. Acoustic Cover  
7. Access Cover  
COMPONENTS: TOP FEED (SINGLE SHEETS)  
2
1
7
3
4
5
6
1. Paper Guides  
2. Sheet Guide  
3. Paper Lever  
4. ON-OFF Switch  
5. Platen Knob  
6. Control Panel  
7. Acoustic Cover  
USING YOUR PRINTER > 13  
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NOTE  
For single-sheet printing, the paper lever must be in the middle  
position.  
TOP OF FORM (TOF)  
Top of Form (TOF) sets the print start position. The factory default is 1"  
from the top.  
The TOF can be changed in increments of 1/144", for either a single  
print job, or all print jobs. The overall amount of adjustment is limited  
to avoid paper jams.  
The first line prints at the red line of the plastic paper shield (1) on the  
printhead.  
1
CAUTION!  
If you turn the platen knob when the printer is not at Top of Form, the  
TOF will misalign. Always feed the paper to TOF before turning the  
platen knob.  
NOTE  
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>
Your software may print the first line of print above or below where  
TOF is set. You may need to adjust the TOF to meet your softwares  
requirements.  
The Top of Form and Forms Tear-Off settings of your printer interact.  
How you set the Top of Form depends on whether Forms Tear-Off is  
ON (set to 500 ms, 1 sec, or 2 sec) or OFF (the factory default  
setting).  
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FORMS TEAR-OFF  
There are two ways to determine the status of the Forms Tear-Off  
menu setting:  
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Print the Menu.  
Use the TEAR key.  
To print the Menu:  
2
3
4
1
1.  
2.  
3.  
4.  
Make sure paper is loaded.  
Hold SHIFT (2), then press SEL (1) to enter the Menu Mode.  
Press PARK (4) to print the menu.  
Look for the Form Tear-Off setting in the paper feed group you  
are using (Rear Feed, Bottom Feed or Top FeedForms Tear–  
Off appears in the Top Feed group only if the optional Roll  
Paper Stand is installed).  
To use the TEAR key:  
1.  
2.  
Make sure paper is loaded and wait 2 seconds.  
Press TEAR (3).  
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If the paper moves up, Forms Tear-Off is OFF.  
If the paper moves down, Forms Tear-Off is ON.  
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SETTING TOP OF FORM (TOF)  
CAUTION!  
Do not use the platen knob to change the Top of Form. If you turn the  
platen knob when the printer is not at Top of Form, the TOF will  
misalign. Always feed the paper to TOF before turning the platen knob.  
The first line prints at the red line of the plastic paper shield on the  
printhead.  
Forms Tear-Off set to OFF - (default)  
With paper loaded and the printer ON:  
1
3
5
7
4
2
6
1.  
2.  
3.  
Press PARK (6) to park the paper.  
Press FF/LOAD (4) to load the paper.  
If the printer is ON line, press SEL | MENU (1) to take the  
printer OFF line.  
The SEL light goes out.  
4.  
Press and hold SHIFT (2), then:  
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Press LF | Micro Feed Down (3) to set the TOF higher (the  
paper moves down).  
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Press FF/LOAD | Micro Feed Up (4) to set the TOF lower  
(the paper moves up).  
(When you begin pressing the Micro Feed key, the printhead will move  
to the right).  
5.  
Press SEL | MENU (1) to place the printer back on line.  
To reset the Top of Form to the factory default, see Resetting Top of  
Form to the Factory Defaultlater in this chapter.  
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Forms Tear-Off set to ON  
With paper loaded and the printer ON and selected:  
1
3
5
7
4
2
6
1.  
Press PARK (6) to park the paper.  
The SEL light goes off and the red alarm light comes on.  
2.  
3.  
Press FF | LOAD (4) to load the paper.  
Wait briefly until the paper moves up to the tear position, then  
press and hold TEAR (5).  
The paper moves to the current TOF and the SEL light is  
illuminated.  
4.  
5.  
If the printer is ON line, press SEL | MENU (1) to take the  
printer OFF line.  
The SEL light goes out.  
Hold down SHIFT (2), then:  
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Press LF | Micro Feed Down (3) to set the TOF higher (the  
paper moves down).  
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Press FF/LOAD | Micro Feed Up (4) to set the TOF lower  
(the paper moves up).  
(When you begin pressing the Micro Feed key, the printhead will move  
to the right).  
6.  
Press SEL | MENU (1) to save the setting and place the printer  
back on line.  
To reset the Top of Form to the factory default, see the next page.  
USING YOUR PRINTER > 17  
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TEMPORARILY CHANGING THE TOP OF FORM  
CAUTION!  
Do not use the platen knob to change the Top of Form. If you turn the  
platen knob when the printer is not at Top of Form, the TOF will  
misalign. Always feed the paper to TOF before turning the platen knob!  
To move the Top of Form position lower for one page only:  
1.  
2.  
Press SEL to deselect the printer.  
Press LF to lower the position of the Top of Form.  
RESETTING TOP OF FORM TO THE FACTORY DEFAULT  
The factory default setting for the Top of Form (where the printing  
should begin) is 1" down from the top of the page.  
To reset the Top of Form to the factory default:  
1.  
2.  
3.  
Remove paper from the paper path.  
Turn the printer off.  
Press and hold PARK + QUIET | TOF while turning on the  
printer.  
4.  
Reload paper.  
FORMS TEAR-OFF FEATURE  
This feature is normally turned off. To use Forms Tear-Off, you must  
enter the menu and change the setting to the desired time interval  
(see Changing the Forms Tear- Off Settings).  
The Forms Tear-Off feature allows a printed continuous forms page to  
be torn off without wasting paper or adjusting the printer. It can be  
used for rear feed continuous forms, bottom feed continuous forms  
(with the optional push tractor installed), or for top feed roll paper  
(with optional roll paper stand installed).  
When the printer is turned on, the paper feeds to the tear-off position.  
USING YOUR PRINTER > 18  
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When data is received, the paper automatically moves down to the  
print position (TOF) and printing begins.  
NOTE  
You can also move the paper down to the print position manually by  
pressing TEAR.  
When printing stops, Forms Tear-Off automatically moves the paper to  
align the perforation with the tear bar (located under the access  
cover), after the time interval which you selected through the menu.  
Paper remains in the tear-off position until the printer receives more  
data. Then, the paper moves back down for printing.  
NOTE  
>
The status of the Forms Tear-Off menu setting affects how you set  
the Top of Form: see Top of Form (TOF) and Forms Tear-Offearlier  
in this chapter.  
>
>
Do not use Forms Tear-Off with labels or multipart forms!  
Forms Tear-Off cannot be used when the optional pull tractor is  
engaged.  
POTENTIAL ISSUES WITH SOFTWARE PACKAGES  
If Forms Tear-Off is set to ON and the software package you are using  
pausesfor a long enough interval while sending data to the printer,  
Forms Tear-Off may be activated. No data is lost, but this causes  
uneven print registration due to the paper movement.  
If this occurs, use the menu to turn off this feature, then use the TEAR  
key to move the paper up to the tear position manually (see  
Changing the Forms Tear-off Settings).  
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CHANGING THE FORMS TEAR-OFF SETTING  
The default setting for Forms Tear-Off is OFF.  
1
3
5
7
4
2
6
To change the Forms Tear-Off setting:  
1.  
2.  
Press SHIFT (2) + SEL (1).  
Press GROUP (3) repeatedly until the Rear Feed or Bottom Feed  
group shows in the first column of the printed line, depending  
on which paper feed you are using,  
3.  
4.  
5.  
Press ITEM (4) repeatedly until Form Tear-Off appears in the  
second column:  
Rear Feed  
Form Tear-Off  
Off  
Press SET (5) until the time interval you wish to select appears  
in the third column:  
Rear Feed  
Form Tear-Off  
1 Sec  
Press SHIFT (2) + SEL (1) to exit Menu Mode and save the  
setting.  
MANUAL FORMS TEAR-OFF  
If you dont wish to engage the Forms Tear-Off feature, you can  
advance:  
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rear-feed continuous forms loaded on the built-in tractor  
or  
bottom-feed continuous forms loaded on the optional push  
tractor  
up to the tear-off position manually by pressing TEAR (5).  
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PAPER PARK  
CAUTION!  
Never park labels.  
Paper park allows you to switch to single-sheet printing without  
removing continuous feed paper from the printer.  
When you wish to print single sheets, simply press PARK (6) to retract  
the continuous form paper from the paper path, then lift the sheet  
guide, load the sheet and send the print job.  
CHANGING PAPER PATHS  
CONTINUOUS FORMS TO SINGLE SHEETS  
1.  
2.  
Tear off any printed pages, then press PARK.  
Raise the sheet guide (1) to the single-sheet feed position.  
1
3.  
Pivot the wire feed guide into the sheet guide.  
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4.  
Move the paper lever (1) to the middle position marked TOP.”  
1
5.  
Adjust the paper guides (1) for the size of paper you are using,  
then place a sheet of paper in the sheet guide.  
1
SINGLE SHEETS TO CONTINUOUS FORMS  
1.  
2.  
Press FF/LOAD to remove the single-sheet paper.  
Lower the sheet guide into the continuous-forms position.  
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3.  
4.  
Swing the wire feed guide over onto the pull-up roller.  
Move the paper lever to the appropriate position.  
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Rear feed:  
Bottom feed:  
If necessary, load continuous-form paper.  
5.  
Press FF/LOAD.  
USING YOUR PRINTER > 23  
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PRINTHEAD GAP  
1.  
The printhead gap is the distance between the printhead and  
the platen.  
CAUTION!  
Make sure the printer is turned off before you open the access cover.  
To adjust the gap, open the access cover and move the coloured lever  
(1) to the recommended setting from the table.  
1
Setting Media  
1
2
3
4
5
Standard paper  
2-part form (with carbon)  
3-part form (with carbon)  
4-part form (with carbon)  
Envelopes or extra thick paper  
NOTE  
When the head gap is set to 2, 3, 4 or 5, the printer automatically slows  
down for better print quality with multipart forms.  
USING YOUR PRINTER > 24  
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PRINT QUALITY  
1
Press PRINT QUALITY (1) to select:  
Utility (UTL)—the default:  
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Medium quality, medium speed (380 cps)  
Gothic typeface only  
High Speed Draft (HSD):  
Lower quality, higher speed (507 cps)  
Gothic typeface only  
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Super Speed Draft (SSD):  
Lowest quality, highest speed (570 cps)  
Gothic typeface only  
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Near Letter Quality (NLQ):  
Highest quality, slowest speed (95 cps)  
Courier or Gothic  
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NOTE  
Front panel settings for print quality and character pitch are normally  
overridden by software commands.  
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CHARACTER PITCH  
1
Character pitch determines how many characters will print on each  
line. You can choose a specific fixed width for each character in  
characters per inch (cpi), or Proportional. The higher cpi settings are  
often used for spreadsheets.  
Proportional (PROP) sets character widths based on the character  
itself: e.g., the letter i is assigned a narrower width than the letter m.  
This provides a more polished, typeset appearance.  
NOTE  
Front panel settings for character pitch are normally overridden when  
the SI command is received from your software.  
EPSON AND IBM EMULATIONS  
Set the character pitch by pressing CHARACTER PITCH (1) until the  
light beneath the desired setting is illuminated:  
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10 cpi; 12 cpi; 15 cpi; 17 cpi; 20 cpi or Proportional  
MICROLINE Emulation  
In the MICROLINE emulation, the Character Pitch choices are:  
l
10 cpi; 12 cpi; 15 cpi; 17 cpi; 20 cpi, Proportional or non-  
proportional  
To select Proportional, press the CHARACTER PITCH key until both the  
cpi value and PROP lights are illuminated.  
To select non-proportional, press the CHARACTER PITCH key until the  
light for the cpi value you wish to use is illuminated.  
USING YOUR PRINTER > 26  
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PRINTER RESET  
1
2
4
3
5
Clearing some error conditions requires that you reset (reinitialise)  
the printer. To do this:  
1.  
Press and release SEL (1) to take the printer off-line.  
The SEL light goes out.  
2.  
Press and hold SHIFT (2), then press the RESET/CHARACTER  
PITCH key (5).  
NOTE  
Pressing SHIFT and RESET reinitialises the printer, but does not affect  
any menu settings and does not reset the printer to the factory defaults.  
For information on resetting the printer to the factory defaults, see  
Resetting the Menu to the Factory Defaultslater in this chapter.  
EMULATIONS  
®
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IBM Proprinter III factory setting  
®
Epson FX  
®
®
Oki MICROLINE  
Changing Emulations  
Make sure paper is loaded.  
1.  
2.  
Press and hold SHIFT (2), then press SEL (1).  
Press LF (3).  
The following line will print:  
Printer Control Emulation Mode IBM PPR  
3.  
4.  
Press TEAR (4) repeatedly until the emulation you wish to  
select prints in the right-hand column.  
Press and hold SHIFT (2), then press SEL (1) to save your  
setting and exit the Menu Mode.  
USING YOUR PRINTER > 27  
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MENU MODE  
In Menu Mode, use the front panel keys to change the defaults for the  
printer parameters. The changes made in the Menu Mode are  
automatically saved when you exit the Menu Mode and are retained,  
even when the printer is turned off.  
NOTE  
Please print the current Menu Mode settings before you reset or change  
them. This is the only way to have a record of the settings.  
MENU MODE KEYS  
5
3
1
2
4
GROUP Key  
Prints the next Group in the Menu.  
With the SHIFT key, prints the previous Group.  
ITEM Key  
Prints the next Item in the Group.  
With the SHIFT key, prints the previous Item in the Group.  
SET Key  
Prints the next setting for an Item.  
With the SHIFT key, prints the previous setting for an Item.  
PRINT Key  
Prints a copy of all the Menu settings.  
With the SHIFT key, prints the current settings for the Group  
selected.  
MENU Light  
ON when the printer is in the Menu Mode.  
MENU MODE > 28  
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ENTERING AND EXITING MENU MODE  
Hold down the SHIFT key while pressing SEL.  
RESETTING THE MENU TO THE FACTORY DEFAULTS  
1.  
2.  
Turn the printer off.  
Press SEL and LF while turning the printer ON.  
PRINTING THE MENU SETTINGS  
1.  
2.  
3.  
Make sure paper is loaded in the printer.  
Press and hold SHIFT, then press SEL to enter the Menu Mode.  
Press PRINT (PARK key).  
PRINTING ALL MENU SETTINGS  
To print out a listing of the settings for all menu items, regardless of  
the emulation selected or the accessories installed:  
Make sure paper is loaded in the printer.  
1.  
2.  
Press and hold SHIFT, then press SEL to enter the Menu Mode.  
Press and hold SHIFT, then press PRINT QUALITY.  
CHANGING THE MENU SETTINGS  
1.  
2.  
3.  
Press and hold SHIFT, then press SEL to enter the Menu Mode.  
Use the GROUP, ITEM and SET keys to make your changes:  
Press GROUP until the Group you wish to change appears in  
the first column.  
4.  
5.  
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.  
MENU MODE > 29  
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6.  
Press and hold SHIFT, then press SEL to exit the Menu Mode  
and save your settings.  
NOTE  
If you turn off the printer without first exiting the Menu Mode, the  
changes you have made will be lost.  
MENU SETTINGS  
For a complete explanation of each menu item, see Explanations of  
Menu Itemslater in this chapter.  
The table following 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.  
Group  
Item  
Settings  
Printer  
Control  
Emulation Mode  
IBM PPR, Epson FX, ML  
Font  
Print Mode  
NLQ Courier, NLQ Gothic, NLQ OCR-B,  
Utility, HSD  
DRAFT Mode  
HSD, SSD  
Pitch  
10 cpi, 12 cpi, 15 cpi, 17.1 cpi, 20 cpi  
NO, YES  
Proportional Spacing  
Style  
Size  
Normal, Italics  
Single, Double  
MENU MODE > 30  
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Group  
Item  
Settings  
Symbol Sets Character Set  
Set I, Set II [Epson and IBM mode]  
Standard, Line Graphics, Block  
Graphics [ML Mode]  
Language Set  
ASCII, French, German, British,  
Danish I, Swedish, 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  
Slashed, Unslashed  
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,  
Zero Character  
Code Page  
Windows East Europe  
Windows Cyrillic,  
East Europe Latin II - 852,  
Cyrillic I - 855, Cyrillic II - 866,  
Kamenicky (MJK), ISO Latin 2,  
Turkey_857, Windows Turkey,  
Ukrainian, Bulgarian,  
ISO Latin 6 (8859/10),  
Windows Baltic, Baltic_774,  
KBL-Lithuanian, Cyrillic Latvian,  
Roman-8, Icelandic-861,  
Multilingual 858, ISO 8859-15  
Greek_737  
Rear Feed  
Line Spacing  
6 LPI, 8 LPI  
Form Tear-Off  
Off, 500 ms, 1 sec, 2 sec  
No, Yes  
13.6", 8"  
11", 11-2/3", 12", 14", 17", 5", 3",  
3.5", 4", 5.5", 6", 7", 8", 8.5"  
Skip Over Perforation  
Page Width (wide model)  
Page Length  
Bottom Feed Line Spacing  
Form Tear-Off  
6LPI, 8 LPI  
Off, 500 ms, 1 sec, 2 sec  
No, Yes  
Skip Over Perforation  
Page Width (wide model)  
Page Length  
13.6", 8"  
11", 11-2/3", 12", 14", 17", 5", 3",  
3.25", 3.5", 4", 5.5", 6", 7", 8", 8.5  
MENU MODE > 31  
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Group  
Item  
Settings  
Top Feed  
Line Spacing  
6 LPI, 8 LPI  
Form Tear-Off*  
Off, 500 ms, 1 sec, 2 sec  
Valid, Invalid  
8", 13.6"  
11", 11-2/3", 12", 14", 17", 5", 3",  
3.25", 3.5", 4", 5.5", 6", 7", 8", 8.5"  
500 ms, 1 sec, 2 sec  
by Actual Page Length, by MENU  
Setting  
Bottom Margin  
Page Width (wide model)  
Page Length  
Wait Time  
Page Length Control  
* With RollPaper Stand fitted  
Set-Up  
Graphics  
Bi-directional, Uni-directional  
8, 7  
1 Line, 32K, 64K, 128K  
No, Yes  
7 or 8 Bit Graphics*  
Receive Buffer Size  
Paper Out Override  
Print Registration 1  
0, range to 0.25 mm to the right or  
left, set in 0.05 mm increments  
Press SEL to shift registration to the  
left;press SHIFT + SEL to shift  
registration to the right.  
0, range to 0.25 mm to the right or  
left, set in 0.05 mm increments press  
SEL to shift registration to the left;  
press SHIFT + SEL to shift registration  
to the right.  
Print Registration 2  
7 or 8 Bits Data Word*  
Operator Panel Function  
Reset Inhibit  
8, 7  
Full Operation, Limited Operation  
No, Yes  
Print Suppress Effective  
Auto LF  
No, Yes  
No, Yes  
Auto CR**  
No, Yes  
CSF Bin Select***  
Print DEL Code*  
SI Select Pitch (10 cpi)**  
SI Select Pitch (12 cpi)**  
Time Out Print  
Bin 1, Bin 2  
No, Yes  
15 cpi, 17.1 cpi  
12 cpi, 20 cpi  
Valid, Invalid  
Auto Select  
No, Yes  
Centring Position  
CSF Type***  
DEFAULT, MODE 1, MODE 2  
Wide, Narrow  
ESC SI Pitch  
17.1 cpi, 20 cpi  
Select Language Set  
Power Saving  
Combined, Code Page Only  
Enable, Disable  
Power Save Time  
5 min., 10 min., 15 min., 30 min.,  
60 min.  
*
When MICROLINE emulation selected.  
** When IBM emulation selected.  
*** When Cut Sheet Feeder fitted.  
MENU MODE > 32  
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Group  
Item  
Settings  
Parallel I/F  
I-Prime  
Pin 18  
Buffer Print, Buffer Clear, Invalid  
+5V, Open  
Auto Feed XT*  
Bi-Direction  
Invalid, Valid  
Enable, Disable  
Note:  
*When Epson emulation selected.  
Serial I/F*  
Parity  
None, Odd, Even  
Serial Data 7/8 bits  
Protocol  
Diagnostic Test  
Busy Line  
8 Bits, 7 Bits  
Ready/Busy, X/ON / X/OFF  
No, Yes  
SSD-, SSD+, DTR, RTS  
19200 bps, 9600 bps, 4800 bps,  
2400, 1200, 600, 300 bps  
Valid, Invalid  
Ready On Power Up, Ready On Select  
200 ms, 1 sec.  
Baud Rate  
DSR Signal  
DTR Signal  
Busy Time  
* When Serial  
I/F installed.  
CSF Bin 1**  
Line Spacing  
6 LPI, 8 LPI  
Bottom Margin  
Page Width (Wide model)  
Page Length  
Valid, Invalid  
8", 13.6"  
11", 11-2/3", 12", 14", 17", 5", 3.5",  
4", 5.5", 6", 7", 8", 8.5"  
CSF Bin 2**  
Line Spacing  
Bottom MarginV  
Page Length  
6 LPI, 8 LPI  
Valid, Invalid  
11", 11-2/3", 12", 14", 17", 5", 3.5",  
4", 5.5", 6", 7", 8", 8.5"  
* * When Cut  
Sheet Feeder  
installed.  
MENU MODE > 33  
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EXPLANATION OF MENU ITEMS  
These explanations are in alphabetical sequence to make it easier to  
look them up. Some items only appear when optional accessories are  
installed; others appear in several groups in the menu.  
7 or 8 Bit Graphics, Default = 7  
Change this setting to 8 if your system uses 8-bit graphics.  
7 or 8 Bit Data Word, Default = 8  
Change this setting to 7 if your system uses 7-bit data word lengths.  
Auto CR, Default =No  
IBM emulation only. 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.  
Auto LF, Default = No  
If your printout is consistently double spaced, select No; if it  
overprints, select Yes.  
Auto Feed XT, Default = Invalid  
Epson emulation only. In the Epson emulation, the XT signal on pin 14  
of the parallel interface can control automatic line feed. Some  
interface cables are wired in such a way that automatic line feed is  
always in effect: this item eliminates this potential problem. If your  
system uses pin 14 of the parallel interface to control automatic line  
feed, change the setting to Valid.  
Auto Select, Default = No  
Determines whether or not your printer will automatically be selected  
after you load in paper. With the factory default engaged, the printer  
will be deselected so that you can set the Top of Form. If you always  
use the same Top of Form position, change the setting to Yes.  
MENU MODE > 34  
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Baud Rate, Default = 9600 bps  
Appears only if optional Serial Interface is installed. Set this to match  
your systems transmission speed.  
Bi-direction, Default = Enable  
Change this setting if you wish to disable bi-directional transmission  
(PnP) in Nibble mode.  
Bottom Margin, Default = Valid  
Change to Invalid if you want the printer to ignore the bottom margin  
setting.  
CAUTION!  
Setting the Bottom Margin to Invalid can cause loss of data and  
damage the printhead by allowing printing without paper.  
Busy Line, Default = SSD-  
Appears only when the optional Serial Interface is installed. If Ready/  
Busy protocol (factory default) is selected, you can choose which line  
your system monitors for a busy signal:  
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SSD -9V, select SSD-  
SSD +9V, select SSD+  
DTR -9V, select DTR  
RTS -9V, select RTS  
Busy Time, Default = 200 ms  
Appears only when the optional Serial Interface is installed. Sets the  
length of the busy signal when the Ready/Busy protocol (factory  
default) is engaged.  
Centering Position, Default = DEFAULT  
Used to limit printhead travel when printing narrow columns.  
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Select Mode 1 for the narrow carriage printer.  
Select Mode 1 or Mode 2 for the wide carriage printer.  
MENU MODE > 35  
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Character Set, Default = IBM Set II  
Epson and IBM emulations only. Use this to switch character sets to  
IBM Set II.  
Character Set, Default = Standard  
MICROLINE emulation only. Use this to switch the character set to Line  
Graphics.  
Code Page, Default = USA  
Choose the Code Page character set you wish to use:  
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, Turkey_857,  
Windows Turkey, Ukrainian, Bulgarian, ISO Latin 6 (8859/10),  
Windows Baltic, Baltic_774, KBL-Lithuanian, Cyrillic Latvian,  
Roman-8, Icelandic-861, Multilingual 858, ISO 8859-15 Greek_737.  
CSF Bin Select, Default = Bin 1  
Appears only when the optional Dual-Bin Cut Sheet Feeder is  
installed. Use this to switch to Bin 2 as the default.  
CSF Type, Default = Wide  
To avoid paper jams, change this setting to Narrow if you are using the  
optional Cut Sheet Feeder on the wide model ML5521 printer.  
Diagnostic Test, Default = No  
Appears only when the optional Serial Interface is installed. Select  
YES to perform a diagnostic test of the serial interface.  
DRAFT Mode, Default = HSD  
Applies only when the Print Mode is set to DRAFT. Selects the draft  
mode to be used: HSD (High Speed Draft) or SSD (Super Speed Draft).  
MENU MODE > 36  
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DSR Signal, Default = Valid  
Appears only when the optional Serial Interface is installed. Used with  
the Ready/Busy protocol (factory default) to select the way your  
system handles the DSR signal.  
DTR Signal, Default = Ready On Power Up  
Appears only when the optional Serial Interface is installed. Change  
to Ready On Select if the DTR signal is required when the printer is  
selected (leave as Ready On Power Up if the DTR signal is required  
when the printer is turned ON).  
Emulation Mode, Default = IBM PPR  
Selects the printer command set (emulation) you want to engage.  
ESC SI Pitch, Default = 17 cpi  
Sets the character pitch used when the ESC SI command is received.  
Form Tear-Off, Default = 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, Default = Bi-directional  
Change to uni-directional graphics for better registration, but slower  
printing. With this set for bi-directional, you can optimise the  
registration using the Print Registration setting in the Menu.  
I-Prime, Default = Buffer Print  
Determines what the printer will do when it receives the I-Prime signal  
from the software.  
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Buffer Print: prints out the buffer contents before resetting.  
Buffer Clear: dumps the buffer contents immediately.  
Invalid: causes the printer to ignore the I-Prime command.  
Select this setting if you wish to enter settings through the  
printers control panel which will not be automatically  
MENU MODE > 37  
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overridden by the softwares settings when the I-Prime signal  
is sent.  
Language Set, Default = ASCII  
Replaces certain standard symbols with special characters used in  
foreign languages.  
Line Spacing, Default = 6 lpi  
Change to 8 lines per inch (lpi) to get more lines on a page.  
Operator Panel Function, Default = Full 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 from being  
changed from the control panel when several people are using the  
printer.  
NOTE  
This feature also prevents access to the Menu. To access the Menu in  
these circumstances, turn the printer off, then hold down the SEL key  
while turning ON the printer.  
Page Length, Default = 11-2/3" or 1/2"  
Selects the length of the paper you are using. This enables the printer  
to keep track of the initial printing position (TOF) on each page.  
Page Length Control, Default = by Actual Page Length  
If you wish to use the Paper End sensor to detect the actual paper end,  
use Actual Page Length setting. If you use by Menu Setting, the  
printer will disregard the Paper End (PE) and use the page length as  
set by the menu.  
Page Width, Default = 13.6"  
Wide carriage model only.  
MENU MODE > 38  
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Paper Out Override, Default = No  
Senses when less than 1" (25 mm) of paper remains and stops  
printing. Change to Yes to override the sensor and print closer to the  
bottom of the page.  
CAUTION!  
Engaging Paper Out Override can cause loss of data and damage the  
printhead by allowing printing without paper.  
Parity, Default = None  
Appears only when the optional Serial Interface is installed. Selects  
the type of parity your system uses: None, Odd or Even.  
Pin 18, Default = +5V  
Sets the signal on pin 18 to +5 volts or open.  
Pitch, Default = 10 cpi  
Choose the character width in characters per inch (cpi).  
Power Save Time, Default = 5 min.  
Sets the interval the printer waits for more data before it goes into the  
power save mode. Power Saving must be set to Enable (the factory  
default) for this to be effective.  
Power Saving, Default = Enable  
Change to Disable if you wish to prevent the printer from entering the  
Power Save mode after the selected interval.  
Print Mode, Default = Utility  
Choose the quality and typeface of printing. Switch to NLQ Courier or  
NLQ Gothic for Near Letter Quality printing. If you are printing  
draft-type documents, select DRAFT, then select either HSD or SSD  
under DRAFT Mode. Both of these Items are in the Font Group.  
MENU MODE > 39  
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Print Registration, Default = 0  
Change the setting as required to obtain the best registration for bi-  
directional printing.  
Print Suppress Effective, Default = Yes  
If your system uses the DC1 and DC3 codes for something other than  
the print suppress mode, change the setting to No.  
Proportional Spacing, Default = No  
Change the setting to Yes to engage proportional spacing of  
characters.  
Protocol, Default = Ready/Busy  
Appears only if the optional Serial Interface is installed. Change to  
X-ON / X-OFF if that is the type of protocol your system uses.  
Receive Buffer Size, Default = 64K  
Selects the amount of memory devoted 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, Default = No  
Select Yes if you wish the printer to ignore the reset command sent by  
software. This prevents your software from changing the settings you  
make through the front panel controls or through printer commands.  
NOTE  
This will also prevent your software from clearing out existing settings  
when you finish printing one document and switch to another.  
Serial Data 7/8 Bits, Default = 8 Bits  
Appears only if the optional Serial Interface is installed. Change to 7  
Bits if your system uses a 7-bit data format.  
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SI Select Pitch 10 cpi, Default = 17.1 cpi  
IBM emulation only. 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, Default = 20 cpi  
IBM emulation only. Sets the pitch to be engaged when the printer  
control panel is set for 12 cpi and the SI command is received.  
Size, Default = Single  
Change to Double for double width and height printing.  
Skip Over Perforation, Default = No  
Change to Yes if you want the printer 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.  
Style, Default = Normal  
Change to Italics if you want the printed characters to be slanted.  
Time Out Print, Default = Valid  
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 dumping the received data while it is waiting for more.  
MENU MODE > 41  
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MAINTENANCE  
REPLACING THE RIBBON CARTRIDGE  
Important!  
Make sure you have the correct replacement ribbon for your printer.  
The wrong ribbon will not print when installed in your printer. Look for  
the printer model number on the ribbon package.  
Ribbon Cartridge Handling  
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Leave unused ribbon cartridges in their packages until  
needed.  
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Careful; the ribbon ink may cause permanent stains.  
Ribbon ink on skin or clothing can usually be removed with  
soap and water.  
Make sure the printer is turned OFF.  
1.  
Open the access cover and center the printhead.  
MAINTENANCE > 42  
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2.  
Swing the used ribbon cartridge up off the printhead, lift it out,  
and discard it.  
WARNING!  
The printhead may be HOT.  
3.  
Unpack the new ribbon cartridge and install it.  
Important!  
Do not remove the ribbon shield (1) from the ribbon!  
1
4.  
5.  
Turn the take-up knob (1) in the direction of the arrow to take  
up any ribbon slack.  
1
Close the access cover and turn the printer back on.  
If ribbon should contact the eyes:  
Flush eyes with large quantities of water for 15 minutes, keeping  
eyelids open with fingers. Seek medical attention.  
If ribbon should contact the skin  
Wash thoroughly with soap and water.  
MAINTENANCE > 43  
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LOADING PAPER  
REAR FEED  
If you have any paper in the paper path, remove it before installing  
rear feed paper.  
2
1
3
1.  
2.  
3.  
Lock Lever  
Upper Tractor Cover  
Pins  
Loading Rear Feed Paper from the Back of the Printer  
These instructions assume you have ready access to the back of the  
printer. If you do not, go to “Loading Rear Feed Paper from the Front of  
the Printer.”  
Make sure the paper lever is forward (position marked REAR).  
MAINTENANCE > 44  
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1.  
Open the access cover (1).  
1
2.  
Grasp the sheet guide. Lift it slightly, then slide it back.  
2
3
1
3.  
Pivot the sheet guide forward and gently rest it against the  
roller assembly.  
Careful! If you push the sheet guide too hard against the roller  
assembly, it may dislodge it. If it does, be sure to reseat the roller  
assembly before continuing.  
MAINTENANCE > 45  
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4.  
From the back of the printer, locate the tractors (1).  
1
5.  
Open the lock levers (1) and move the right tractor (as viewed  
from the back of the printer) to the reference mark (2)  
matching the width of the paper you are loading. Then close  
the lock lever on the right tractor:  
1
2
9.5  
10  
5520  
5521  
1
16  
15  
NOTE  
The movement of the right tractor is limited to ensure that the paper  
covers the paper sensor.  
6.  
Open the tractor covers.  
MAINTENANCE > 46  
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7.  
Place continuous forms paper on the first two pins of either  
tractor.  
Important! You must keep the number of paper holes engaged on  
either pin the same. If you don’t the paper will skew and jam.  
8.  
Close the right tractor cover.  
9.  
Adjust the left tractor until the holes in the paper are centred  
on the pins then lock the lever and close the left tractor cover.  
NOTE  
If the paper is too loose, or too tight, it can cause jams.  
MAINTENANCE > 47  
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10. Lower the sheet guide and slide it towards the front of the  
printer until the marks align.  
11. Place the wire guide in the sheet guide on the pull-up roller  
assembly.  
12. Press FF/LOAD.  
NOTE  
The factory default setting for the Top of Form (where the printing should  
begin) is 1" down from the top of the page. To change the setting, see  
Top of Form (TOF)in the previous chapter.  
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Loading Rear Feed Paper from the Front of the Printer  
These instructions assume that you do not have ready access to the  
back of the printer. If you do, go back to “Loading Rear Feed Paper  
from the Rear of the Printer” earlier in this chapter.  
2
1
3
1.  
2.  
3.  
Lock Lever  
Upper Tractor Cover  
Pins  
Make sure the paper lever is forward (position marked REAR).  
1.  
Open the access cover (1).  
1
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2.  
Grasp the tabs and lift off the sheet guide.  
3.  
Pull up on the lock levers to release them.  
NOTE  
The movement of the left tractor (as viewed from the front of the printer)  
is restricted to ensure that the paper covers the paper out sensor.  
4.  
Move the left tractor to the position to match your paper size  
and push back on the lever to lock it in place, then move the  
right tractor to fit the width of the paper. You will find reference  
marks (1 in illustration below) on the printer for the two most  
common paper sizes:  
16  
15  
10  
9.5  
5520  
5521  
1
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5.  
Open the tractor covers and place continuous forms paper on  
the first two pins of either tractor, then close the left tractor  
cover.  
NOTE  
You must keep the number of paper holes engaged on either pin the  
same. If you dont the paper will skew and jam.  
6.  
Adjust the position of the right tractor to centre the holes in  
the paper on the pins. Then, close the right tractor cover and  
push back the lock lever. Do not stretch the paper.  
If the paper is too loose or too tight it can cause jams.  
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7.  
Reinstall the sheet feeder.  
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8.  
Place the wire guide (1) in the sheet guide on the pull-up roller  
assembly.  
9.  
Press FF/LOAD.  
NOTE  
The factory default setting for the Top of Form (where the printing should  
begin) is 1" down from the top of the page. To change the setting, see  
Top of Form (TOF)in the previous Chapter.  
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TOP FEED (SINGLE SHEETS)  
If you have continuous form paper in the path, press PARK to remove  
it before loading single sheets.  
Make sure the printer is on and deselected (SEL light off).  
1.  
Move the paper lever (1) to the centre position (marked  
TOP).  
1
2.  
Open the acoustic cover (1) and raise the sheet guide (2) to the  
single-sheet position. Pivot the wire feed guide (3) up into the  
sheet guide.  
2
3
1
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3.  
Adjust the paper feed guides (1) for the width of the paper,  
then place a sheet of paper in the separator. The paper will  
feed into the printer.  
1
NOTES  
>
>
If the paper does not feed in, remove it. Check the paper lever  
position. Make sure the ALARM light is ON: if it is flashing, hold the  
SHIFT key and press the CHARACTER PITCH/RESET key. Reload the  
sheet of paper.  
The factory default setting for the Top of Form (where the printing  
should begin) is 1" down from the top of the page. To change the  
setting, see Top of Form (TOF)in the previous chapter.  
CLEARING PAPER JAMS  
REAR FEED JAMS  
1.  
2.  
Turn the printer OFF.  
Use the platen knob to back the paper all the way out of the  
printer.  
CAUTION!  
Make sure the printer is turned OFF before you open the access cover.  
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3.  
Open the access cover (1) and remove the pull-up roller  
assembly (2). Remove any torn paper.  
2
1
4.  
Lift the sheet guide (1) and reload paper. Make sure you lock  
the tractor covers.  
5.  
Lower the sheet guide, then install the pull-up roller assembly  
and close the access cover.  
6.  
Turn the printer ON and press FF/LOAD.  
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REAR FEED, REPEATING PAPER JAMS  
If the paper keeps jamming, you may have:  
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defective paper  
misaligned paper  
bits of paper stuck in the paper path  
Defective Paper  
Replace the defective paper with a fresh stack.  
Misaligned Paper  
1.  
2.  
Turn off the printer.  
Use the platen knob to back the paper all the way out of the  
printer.  
3.  
4.  
Tear off a couple of sheets of paper, leaving a new, clean,  
square-cut edge.  
Reload the paper and turn the printer back on.  
Fragments of Paper in the Paper Path  
1.  
2.  
Turn off the printer.  
Use the platen knob to back the paper all the way out of the  
printer.  
CAUTION!  
Make sure the printer is turned OFF before you open the access cover.  
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3.  
Open the access cover (1) and remove the pull-up roller  
assembly (2). Then grasp the tabs (3) on the sheet guide (4)  
and lift it off the printer.  
2
4
3
3
1
4.  
5.  
Remove any torn pieces of paper.  
Fold some continuous-form paper over three times to make a  
page four sheets thick. Then, load it on the tractors and close  
and lock the covers.  
6.  
7.  
Use the platen knob to draw the quadruple-thick page around  
the platen. This brings out jammed pieces of paper.  
Remove the paper pieces. Then, use the platen knob to back  
the paper out.  
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8.  
Load standard paper, close and lock the tractor covers.  
9.  
Install the sheet guide, then install the pull-up roller assembly  
and close the access cover.  
10. Turn the printer on and press FF/LOAD.  
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SINGLE SHEET PAPER JAMS  
1.  
2.  
Turn off the printer.  
Use the platen knob to back the paper out.  
3.  
Open the access cover (1) and remove the pull-up roller  
assembly (2).  
2
1
4.  
5.  
Remove any torn pieces from around the carriage.  
Reinstall the pull-up roller assembly and close the access  
cover.  
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CLEANING THE HOUSING  
You should clean the printer housing every six months (or after about  
300 hours of operation).  
CAUTION!  
Never use strong solvents or strong detergents on the cabinet—they  
could damage the housing.  
1.  
2.  
Turn off the printer.  
Use the platen knob to back the paper out of the printer.  
CAUTION!  
Make sure the printer is turned off before you open the access cover.  
3.  
Open the access cover (1) and remove the pull-up roller  
assembly (2).  
2
1
4.  
Use a clean, dry cloth to dust around the carriage shaft and  
platen. Remove any loose bits of paper.  
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5.  
Reinstall the pull-up roller assembly and close the access  
cover.  
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TROUBLESHOOTING  
GENERAL INFORMATION  
Here are some general things to check before proceeding with  
detailed troubleshooting.  
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Is the printer plugged in and turned ON?  
Are the connections (power and interface) secure?  
Is the product being operated under the proper ambient  
conditions?  
l
Does the paper being used meet the specifications for this  
product?  
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Is the paper properly installed?  
Is the ribbon properly installed?  
Is an Oki ribbon being used?  
Is the printhead gap correctly set?  
Are the correct printer drivers being used for the printer?  
NOTE  
>
>
Settings in your software application will normally override any  
settings in your printer driver.  
Printer driver settings normally override settings from the printer  
menu or printer front panel.  
Problem  
My word processor files do not print the way I have the menu and front  
panel set.  
Solution  
Remember:  
l
Settings in your software application can override settings in  
your printer driver.  
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l
Your printer driver settings can override any settings from the  
printer menu or printer front panel.  
Before sending a file to the printer, many word processors send either  
an initialization stringor 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 to the Set-Up group and change the setting for  
Reset Inhibit to Yes.  
The I-Prime signal will automatically override any front panel settings  
you have made. To eliminate this problem, enter the Menu Mode, go  
to the Parallel Interface group and change the setting for I-Prime to  
Invalid.  
For more information on changing menu settings, see Changing the  
Menu Settingsin Chapter 3.  
Problem  
Nothing happens when I turn ON the printer.  
Solution  
Check the power cord connection to the outlet and to the printer. If  
you are using a power strip, make sure it is turned ON, and that the  
fuse hasnt blown or that the circuit breaker hasnt tripped.  
Problem  
The printer does not print when the computer sends data.  
Solutions  
1.  
2.  
Is the SEL light on? If not, press the SEL key.  
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.  
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Problem  
I'm getting strange symbols, incorrect fonts, etc., when I try to print a  
document.  
Solutions  
1.  
Check to be sure that the printer driver you have selected in  
your software matches the printer emulation.  
2.  
Press SHIFT and SEL keys, then press GROUP key.  
This will print a line showing the emulation you have selected.  
3.  
If you have embedded any printer commands in your software,  
check to be sure that you entered them correctly.  
Problem  
Ink smears on the paper when I print narrow columns.  
Solution  
This may be caused by excessive printhead travel from the centering  
position. Enter the Menu and set the Centring Position to MODE 1. See  
Using Your Printer, Menu Mode.”  
For the wide carriage printer, if MODE 1 doesn't work, try setting the  
Centering Position to MODE 2.  
Problem  
I've installed a new ribbon and the printing is smeared and streaked.  
Solution  
The ribbon shield (1) is either loose or missing.  
1
Remove the ribbon cartridge and check the ribbon shield.  
If it is loose, secure it.  
If it is missing, find it and install it.  
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Problem  
There are dots missing in my printouts.  
Solution  
The head gap may not be set correctly. Try moving the headgap lever  
to a lower setting. If that doesnt help, the printhead may be  
damaged; call for service.  
Problem  
The ALARM light is flashing.  
Solution  
Try turning the printer OFF and then back ON again. If the light still  
blinks, call for service.  
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 ON and the Character Pitch 15 light is flashing.  
Solution  
This indicates a paper jam. Press the SEL key and correct the paper  
jam situation. See Clearing Paper Jams,in Chapter 3.  
Problem  
The printer needs paper. The ALARM is not ON and I can’t load paper.  
Solution  
1.  
2.  
Press and release the SEL key.  
Press and hold the SHIFT key and press the RESET /  
CHARACTER PITCH key.  
The ALARM light illuminates and you can now load paper.  
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Problem  
Continuous-form paper sticks to the sheet guide.  
Solution  
In cold dry weather, static charges can build up and make the paper  
cling to the sheet guide. Try moving the paper guides together so that  
the paper rests on the guides rather than on the separator.  
Problem  
The Print Quality and Character Pitch keys on the front panel don't  
work.  
Solution  
The Operator Panel Function in the printer menu can be used to  
disable these buttons (Limited Function). 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.  
Check with your system manager before changing any menu settings.  
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PARTS AND ACCESSORIES  
Purchasing Parts & Accessories  
Before you purchase parts and accessories, make a note of your  
printer model number (see the front of the unit) and have the correct  
part number and description of the item you wish to purchase. Item  
descriptions and part numbers are provided in this section.  
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Consult the dealer where you purchased your printer.  
Locate an Authorised Oki Reseller by visiting your local Oki  
web site. Links to all countries are provided on:  
x 2  
5
4
3
2
7
1
6
Item  
Part number  
ML5520  
Part number  
ML5521  
Ribbon Cartridge (1)  
Platen Knob (2)  
01126301  
01126301  
2PP4025-2871P021 2PP4025-2871P021  
Power Cord (3) - Euro  
UK  
YS4011-1272P001  
YS4011-1273P001  
Printhead (4)  
41923901  
42115401  
41923901  
42115301  
Access Cover (5)  
Sheet Guide (6)  
1PA4094-7305G010 1PA4094-7308G011  
42045701  
Pull-up Roller Assembly (7) 42044701  
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1
2
3
4
5
Option  
Part number Part number  
ML5520  
ML5521  
Pull Tractor, Top-Mount (1)  
Push Tractor, Bottom-Mount (2)  
Roll Paper Stand (3)  
09002365  
09002366  
09002332  
09002369  
09002370  
N/A  
Cut Sheet Feeder (4)  
Single Bin  
09000691  
09000692  
09000695  
09000696  
Dual Bin  
Serial Interface RS232C (5)  
09002351  
09002351  
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PRINTER CONTROL CODES  
This section lists the most commonly used printer control codes.  
You will find a comprehensive listing of the control codes (English  
only) on your Printer CD.  
To access it:  
1.  
2.  
3.  
Place the CD in your CD-ROM drive and wait for it to AutoPlay.  
Select your printer model, then click Continue.  
Click Documentation and follow the on-screen prompts to view  
the file.  
IBM PROPRINTER III COMMANDS  
IBM Command  
ASCII  
Decimal  
Backspace  
BS  
CR  
8
Carriage Return  
13  
Character Pitch:  
Select 10 cpi  
Select 12 cpi  
Select 15 cpi  
DC2  
ESC:  
ESC G  
ESC SI, or SI  
18  
27 58  
27 103  
27 15, OR 15  
Select condensed Print  
Character Sets:  
IBM Set I  
ESC 7  
27 55  
IBM Set II  
ESC 6  
27 54  
Publisher  
ESC ! Z  
ESC ! @  
ESC ! A  
27 33 90  
27 33 64  
27 33 65  
Slashed Zero  
Unslashed Zero  
Double Width ON  
ESC W 1  
ESC W 0  
27 87 49  
27 87 48  
Double Width OFF  
Emphasised Printing ON  
Emphasised Printing OFF  
ESC E  
ESC F  
27 69  
27 70  
Enhanced Printing ON  
Enhanced Printing OFF  
ESC G  
ESC H  
27 71  
27 72  
Form Feed  
FF  
12  
Form Length:  
n inches (n = 1 to 255)  
n lines (n = 1 to 255)  
ESC C NUL n  
ESC C n  
27 67 0 n  
27 67 n  
Horizontal Tab, Execute  
HT  
9
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IBM Command  
ASCII  
Decimal  
Italics ON  
Italics OFF  
ESC % G  
ESC % H  
27 37 71  
27 37 72  
Line Feed, Execute:  
w/ Carriage Return  
LF  
10  
n/144" (n = 1 to 127)  
n/216" (n = 0 to 255)  
Reverse  
ESC % 5 n  
ESC J n  
ESC ]  
27 37 53 n  
27 74 n  
27 93  
Auto Line Feed ON  
Auto Line Feed OFF  
ESC 5 1  
ESC 5 0  
27 53 49  
27 53 48  
Line Spacing:  
Set Spacing to 1/8"  
Set Spacing to 7/72"  
Set Spacing to n/72"  
Store Spacing Set by ESC A n  
Set Spacing to n/144"  
(n = 1 to 127)  
ESC 0  
ESC 1  
ESC A n  
ESC 2  
27 48  
27 49  
27 65 n  
27 50  
ESC % 9 n  
ESC 3 n  
27 37 57 n  
27 51 n  
Set Spacing to n/216"  
(n = 0 to 255)  
Overscore ON  
Overscore OFF  
ESC _ 1  
ESC _ 0  
27 95 49  
27 95 48  
Paper Out Sensor OFF  
Paper Out Sensor ON  
ESC 8  
ESC 9  
27 56  
27 57  
Print Quality, Select HSD  
Print Suppress Mode ON  
ML5520  
ML5521  
Print Suppress Mode Off  
ESC # 0  
27 35 48  
ESC Q ETX  
ESC Q SYN  
DC1  
27 81 3  
27 81 22  
17  
Proportional Spacing ON  
Proportional Spacing OFF  
ESC P 1  
ESC P 0  
27 80 49  
27 80 48  
Reset: Clear Print Buffer  
Software I-Prime  
Stop Printing  
CAN  
24  
ESC } NUL  
ESC j  
27 125 0  
27 106  
Subscript ON  
Superscript ON  
Subscript/Superscript OFF  
ESC S 1  
ESC S 0  
ESC T  
27 83 49  
27 83 48  
27 84  
Top of Form,  
Set at Current Position  
ESC 4  
27 52  
Underline Printing ON  
Underline Printing OFF  
ESC - 1  
ESC - 0  
27 45 49  
27 45 48  
Uni-Directional Print ON  
Uni-Directional Print OFF  
ESC U 1  
ESC U 0  
27 85 49  
27 85 48  
Vertical Tab, Execute  
VT  
11  
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EPSON FX COMMANDS  
Epson Command  
ASCII  
Decimal  
Backspace  
BS  
8
Carriage Return  
Execute  
CR  
13  
Character Pitch:  
Select 10 cpi  
Select 12 cpi  
Select 15 cpi  
Begin 10 cpi  
ESC P  
ESC M  
ESC g  
ESC SI, or SI  
27 80  
27 77  
27 103  
27 15, OR 15  
Cancel Condensed Print  
Delete  
DC2  
DEL  
18  
127  
Double Height ON  
Double Height OFF  
ESC w 1  
ESC w 0  
27 119 49  
27 119 48  
Double Width ON  
Double Width OFF  
ESC W 1  
ESC W 0  
27 87 49  
27 87 48  
Emphasised Printing ON  
Emphasised Printing OFF  
ESC E  
ESC F  
27 69  
27 70  
Enhanced Printing ON  
Enhanced Printing OFF  
ESC G  
ESC H  
27 71  
27 72  
Epson Set 1, Select  
Epson Set 2, Select  
ESC t 0  
ESC t 1  
27 116 48  
27 116 48  
Italics Printing ON  
Italics Printing OFF  
ESC 4  
ESC 5  
27 52  
27 53  
Form Feed  
FF  
12  
Form Length:  
n inches (n = 1 to 22)  
n lines (n = 1 to 127)  
ESC C NUL n  
ESC C n  
27 67 0 n  
27 67 n  
Horizontal Tab, Execute  
HT  
9
Justification:  
Left  
ESC a 0  
ESC a 1  
ESC a 2  
ESC a 3  
27 97 48  
27 97 49  
27 97 50  
27 97 51  
Center  
Right  
Full  
Line Feed, Execute:  
Select 10 cpi  
ESC P  
27 80  
Select 12 cpi  
ESC M  
LF  
ESC J n  
ESC % 5 n  
ESC j n  
27 77  
10  
27 74 n  
27 37 53 n  
27 106  
w/ Carriage Return  
n/216" (n = 0 to 255)  
n/144" (n = 1 to 127)  
Reverse, n/216  
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Epson Command  
ASCII  
Decimal  
Line Spacing.  
Set Spacing to:  
ESC % 9 n  
ESC 3 n  
ESC A n  
ESC 2  
27 37 57 n  
27 51 n  
27 65 n  
27 50  
n/144" (n = 0 to 127)  
n/216" (n = 0 to 255)  
n/72" (n=0 to 85 or 0 to 213)  
1/6"  
1/8"  
7/72"  
ESC 0  
ESC 1  
27 48  
27 49 n  
Paper Out Sensor OFF  
Paper Out Sensor ON  
ESC 8  
ESC 9  
27 56  
27 57  
Print Quality/Font:  
Select HSD/SSD  
(depends on setting for Draft Mode)  
Select NLQ  
Select Courier (NLQ only)  
Select Gothic (NLQ only)  
Select UTL  
ESC ( 0  
ESC x  
ESC k  
ESC k 1  
ESC x 0  
27 40 48  
27 107 48  
27 107 49  
27 115 49  
27 115 48  
Print Speed:  
Half-Speed ON  
Half-Speed OFF  
ESC s 1  
ESC s 0  
27 115 49  
27 115 48  
Print Suppress Mode ON  
Print Suppress Mode OFF  
DC3  
DC1  
19  
17  
Proportional Spacing ON  
Proportional Spacing OFF  
ESC p 1  
ESC p 0  
27 112 49  
27 112 48  
Reset Printer:  
Clear Buffer & Initialise  
Clear Print Buffer  
ESC @  
CAN  
27 64  
24  
Skip Over Perforation, Cancel  
Software I-Prime  
ESC O  
27 79  
ESC } NUL  
27 125 0  
Subscript ON  
Superscript ON  
Subscript/Superscript OFF  
ESC S 1  
ESC S 0  
ESC T  
27 83 49  
27 83 48  
27 84  
Underline ON  
Underline OFF  
ESC - 1  
ESC - 0  
27 45 49  
27 45 48  
Uni-Directional Printing:  
One Line only  
ESC  
27 60  
ON  
OFF  
ESC U 1  
ESC U 0  
27 85 49  
27 85 48  
Vertical Tab, Execute  
VT  
11  
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OKI MICROLINE STANDARD COMMANDS  
Oki Command  
ASCII  
Decimal  
Backspace  
BS  
CR  
8
Carriage Return  
13  
Character Pitch:  
Select 10 cpi  
Select 12 cpi  
Select 15 cpi  
Select 17.1 cpi  
Select 20 cpi  
RS  
FS  
ESC g  
GS  
ESC # 3  
30  
28  
27 103  
29  
27 35 51  
Character Sets:  
Standard  
ESC ! 0  
ESC ! 1  
ESC ! 2  
ESC ! Z  
27 33 48  
27 33 49  
27 33 50  
27 33 90  
Block Graphic  
Line Graphic  
Publisher  
Slashed Zero  
Unslashed Zero  
ESC ! @  
ESC ! A  
27 33 64  
27 33 64  
Double Height ON  
Double Height OFF  
ESC US 1  
ESC US 0  
27 31 49  
27 31 48  
Double Width Printing  
US  
31  
Emphasised Printing ON  
Emphasised Printing OFF  
ESC T  
ESC I  
27 84  
27 73  
Enhanced Printing ON  
Enhanced Printing OFF  
ESC H  
ESC I  
27 71  
27 73  
Form Feed  
FF  
12  
9
Horizontal Tab, Execute  
HT  
Italics ON  
Italics OFF  
ESC ! /  
ESC ! *  
27 33 47  
27 33 42  
Line Feed, Commands:  
w/ Carriage Return  
wo/ Carriage Return  
n/144" (n = 1 to 127)  
Reverse  
LF  
10  
ESC DC2  
ESC % 5 n  
ESC LF  
27 18  
27 37 53 n  
27 10  
Line Spacing:  
Set Spacing to 1/6"  
Set Spacing to 1/8"  
Set Spacing to n/144"  
(n = 1 to 127)  
ESC 6  
ESC 8  
27 54  
27 56  
ESC % 9 n  
27 37 57 n  
Skip Over Perforation:  
1/3" increments  
(n = 1 to 9)  
ESC g n n  
ESC % S O  
27 71 nn  
27 37 83 48  
Default  
PRINTER CONTROL CODES > 74  
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Oki Command  
ASCII  
Decimal  
Paper Out Sensor OFF  
Paper Out Sensor ON  
ESC E 1  
ESC E 0  
27 69 49  
27 69 48  
Print Quality:  
Select HSD  
ESC # 0  
ESC 1  
ESC 3  
ESC 0  
27 35 48  
27 49  
27 51  
Select NLQ Courier  
Select NLQ Gothic  
Select Utility  
27 48  
Print Speed:  
Set to Full  
Set to Half  
ESC >  
ESC <  
27 62  
27 60  
Print Suppress ON  
Print Suppress OFF  
DC3  
DC1  
19  
17  
Proportional Printing:  
ON  
OFF  
ESC Y  
ESCZ  
27 89  
27 90  
Reset: Clear Print Buffer  
CAN  
24  
Shift-In  
Shift-Out  
SI  
SO  
15  
14  
Software I-Prime  
ESC } NUL  
27 125 0  
Subscript Printing ON  
Subscript Printing OFF  
Superscript Printing ON  
Superscript Printing OFF  
ESC L  
ESC M  
ESC J  
27 76  
27 77  
27 74  
27 75  
ESC K  
Underline Printing ON  
Underline Printing OFF  
ESC - C  
ESC - D  
27 67  
27 68  
Uni-Directional Print ON  
Uni-Directional Print OFF  
ESC -  
ESC =  
27 45  
27 61  
Vertical Tab, Execute  
VT  
11  
PRINTER CONTROL CODES > 75  
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SPECIFICATIONS  
Item  
Specification  
Print Method  
Printhead  
Impact dot matrix  
9 pins, 0.30 mm (0.0118") diameter, with thermal  
protection  
Interfaces:  
Standard:  
Centronics parallel, IEEE-1284 compliant  
USB 1.1  
Optional:  
RS-232C Serial  
Receive Buffer Size  
Maximum 128K  
Reliability  
Ribbon Life  
Printhead Life  
4 million characters, on average, 10 cpi utility  
200 million characters average in 10 cpi utility mode at  
25% duty and 35% page density  
Mean Time Between  
Failures (MTBF)  
20,000 hours at 25% duty cycle and 35% page density  
Mean Time to Repair (MTTR) 15 minutes  
Emulations (co-resident)  
IBM Proprinter III  
Epson FX  
Oki MICROLINE Standard  
Print Speed  
Speed*  
Super Speed Draft  
High Speed Draft (HSD)  
Utility  
570 cps  
507 cps  
380 cps  
Near Letter Quality (NLQ)  
95 cps  
* cps = characters per second  
Characters per Line (cpl) Setting  
ML5520  
80 cpl  
96 cpl  
120 cpl  
137 cpl  
160 cpl  
ML5521  
136 cpl  
163 cpl  
204 cpl  
233 cpl  
272 cpl  
10 cpi  
12 cpi  
15 cpi  
17.1 cpi  
20 cpi  
Graphics Resolution  
IBM, Epson  
Density  
Single  
Max. Resolution (dpi)  
60 x 216  
Double  
120 x 216  
Quadruple  
Single  
240 x 216  
72 x 72  
Oki Microline  
Double  
144 x 144  
Quadruple  
* dpi = Dots per Inch  
288 x 144  
SPECIFICATIONS > 76  
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Item  
Specification  
Resident Fonts  
Near Letter Quality  
Utility  
Courier, Gothic  
Gothic  
High Speed Draft  
Super Speed Draft  
Gothic  
Gothic  
Bar Codes  
Code 39  
UPC A, UPC E  
EAN 8, EAN 13  
Interleaved 2 of 5  
Code 128  
Postnet  
Paper Thickness: Tractor Feed  
Rear Feed:  
0.014" (0.36 mm) max.  
0.017" (0.44 mm) max.  
Bottom Feed*:  
*requires optional push  
or pull tractor.  
SPECIFICATIONS > 77  
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Item  
Specification  
Paper Specifications:  
Single (Cut) Sheets  
Feed:  
Top only  
14 to 24 lb. US Bond (52.6 to 90 g/m2)  
ML5520: 7.2" to 8.5" (183 to 216 mm)  
ML5521: 7.2" to 14.3" (183 to 363.2 mm)  
Weight:  
Width Range:  
Single-part, continuous  
forms  
Rear, Bottom*  
Feed:  
12 to 24 lb. US Bond (45 to 90 g/m2)  
ML5520: 3" to 10" (76.2 to 254 mm)  
ML5521: 3" to 16" (76.2 to 406.4 mm)  
Weight:  
Width Range:  
Carbonless continuous forms  
(orig. + 4 copies)  
Feed:  
Rear, Bottom*  
9 to 11 lb.  
Weight:  
ML5520: 3" to 10" (76.2 to 254 mm)  
ML5521: 3" to 16" (76.2 to 406.4 mm)  
Width Range:  
Interleaf continuous forms  
(orig. + 4 copies)  
Feed:  
Rear, Bottom*  
10 to 12 lb. paper, 9 lb carbon  
ML5520: 3" to 10" (76.2 to 254 mm)  
ML5521: 3" to 16" (76.2 to 406.4 mm)  
Weight:  
Width Range:  
Labels  
Bottom* only  
Not applicable  
ML5520: 3" to 10" (76.2 to 254 mm)  
ML5521: 3" to 16" (76.2 to 406.4 mm)  
Feed:  
Weight:  
Width Range:  
Envelopes, single feed  
Feed:  
Top only  
Max. 24 lb.  
Weight:  
6.5" to 9.5" (165 to 241 mm)  
Width Range:  
Envelopes,continuousfeed,  
(non-overlap type)  
Feed:  
Bottom* only  
Max. 24 lb.  
6.5" to 9.5" (165 to 241 mm)  
Weight:  
Width Range:  
Card Stock  
Feed:  
Bottom only*  
Max. 100 lb. Index (180 g/m2)  
Not applicable  
Weight:  
Width Range:  
* Bottom feed requires optional pull or push tractor  
SPECIFICATIONS > 78  
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Item  
Specification  
Environmental Requirements  
Temperature  
Operating:  
41 to 95°F (5 to 36°C)  
Storage:  
14 to 122°F (-10 to 50°C)  
Humidity  
Operating:  
Storage:  
20 to 80% RH  
5 to 95% RH  
Electrical Requirements  
230 ac, (+15%, -14 %)  
50 or 60 Hz ( 2%)  
58W - typical, 10W - idle  
Physical Specifications  
ML5520  
Size (WxDxH*):  
Weight:  
17.1" x 16.1" x 6"* (434 x 409 x 153 mm*)  
16.7 lbs. (7.6 kg)  
ML5521  
Size (WxDxH*):  
Weight:  
23.1" x 16.1" x 6"* (588 x 409 x 153 mm*)  
21.1 lbs. (9.6 kg)  
*Height dimensions do not include the acoustic cover.  
SPECIFICATIONS > 79  
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SETTING UP YOUR PRINTER  
LOCATION  
l
l
Place your printer on a firm, solid surface.  
Allow enough space around the printer to easily access the  
platen knob and the various paper feed paths.  
l
Make sure a suitable grounded power outlet is available  
nearby.  
UNPACKING  
l
l
If any items are missing, contact your dealer immediately.  
Keep your packing materials and carton in case you ever need  
to ship or transport the printer.  
l
Interface cable and paper are sold separately.  
1
2
3
1.  
2.  
3.  
Printer  
Ribbon Cartridge  
Power Cord  
SETTING UP YOUR PRINTER > 80  
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1.  
Remove any packing tape, then grasp the tabs (1) at either end  
of the access cover and pivot it towards the front of the printer  
as far as it will go.  
1
2.  
Remove the printhead shipping restraint.  
3.  
Remove the shipping restraint from the pull-up roller assembly  
(1).  
1
SETTING UP YOUR PRINTER > 81  
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4.  
Use the tabs (1) to lift and remove the sheet guide, then  
remove the shipping restraint.  
1
5.  
Reinstall the sheet guide: insert the clips on either side of the  
separator into the notches marked with a triangle, then press  
down to secure the separator in place.  
1
SETTING UP YOUR PRINTER > 82  
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INSTALLING THE RIBBON CARTRIDGE  
CAUTION!  
Make sure you have the correct replacement ribbon for your printer.  
The wrong ribbon will not print when installed in your printer.  
RIBBON CARTRIDGE HANDLING  
l
Leave unused ribbon cartridges in their packages until  
needed.  
l
l
Careful; the ribbon ink may cause permanent stains.  
Ribbon ink on skin or clothing can usually be removed with  
soap and water.  
Make sure the printer is turned OFF.  
1.  
Open the access cover and center the printhead (1).  
WARNING!  
The printhead may be HOT.  
SETTING UP YOUR PRINTER > 83  
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2.  
Unpack the new ribbon cartridge and install it on the  
printhead.  
1
CAUTION!  
Do not remove the ribbon shield (1) from the ribbon!  
3.  
Turn the take-up knob (1) in the direction of the molded-in  
arrow to take up any ribbon slack.  
1
4.  
Close the access cover and turn the printer ON.  
SETTING UP YOUR PRINTER > 84  
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POWER CONNECTION  
Make sure both the printer and the computer are switched OFF.  
1.  
Plug the power cord into the back of the printer, then into a  
grounded outlet.  
2.  
Turn on the printer.  
SETTING UP YOUR PRINTER > 85  
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COMPUTER CONNECTIONS  
PARALLEL (LPT), IEEE 1284  
l
Requires a bi-directional cable, max. length 6 ft. (1.8 m), not  
supplied.  
l
Printer has a 36-pin socket  
Make sure the printer and computer are both turned OFF.  
1.  
Attach a suitable bi-directional cable to the parallel connector  
on the back of the printer. Then attach and secure the cable to  
your computer.  
2.  
Turn the printer and computer back ON.  
USB, SPECIFICATION 1.1 COMPLIANT  
l
Requires a USB 1.1 cable, maximum length 19.7 ft. (5 m), not  
supplied.  
l
Printer has a USB series Breceptacle.  
Make sure the printer and computer are both turned OFF.  
SETTING UP YOUR PRINTER > 86  
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3.  
Attach a suitable USB cable to the printer. Then attach the  
cable to your computer.  
4.  
Turn the computer and printer back on.  
LOADING PAPER  
For instructions on loading paper, see Loading Paperin the chapter  
on Maintenance.  
TESTING THE PRINTER  
l
l
l
Font Sample Test  
Rolling ASCII Test  
Hexadecimal Dump Mode  
SETTING UP YOUR PRINTER > 87  
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Font Sample Test  
The Font Sample Test prints a sample of the fonts standard to the  
printer.  
The top of the printout shows the Printer Model, Emulation, Country  
Code, Interface, and Firmware Revision Level.  
Make sure paper is loaded.  
1.  
2.  
Turn the printer OFF.  
Press and hold the LF key while turning the printer back ON.  
The printer will print a page of font samples and the test ends.  
SETTING UP YOUR PRINTER > 88  
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Rolling ASCII Test  
CAUTION!  
Wide carriage Model ML5521:  
If you are using 8.5 inch paper to run the tests, make sure the paper  
width selection in the printer menu is set to 8.5 inches. Otherwise,  
printing on the platen may damage the printer. See the chapter on  
“Menu Mode” for more information.  
The Rolling ASCII Print Test produces a continuous printout of all 96  
ASCII characters in a rolling pattern in whatever typeface is selected  
(default = LQ Courier).  
The top of the printout shows the Printer Model, Emulation, Country  
Code, and Firmware Revision Level.  
Make sure continuous forms paper is loaded.  
1.  
2.  
Turn the printer OFF.  
Press and hold the QUIET/TOF key while turning the printer  
back ON. (If the printer comes on without starting the Rolling  
ASCII test print, you did not hold the QUIET/TOF key long  
enough.)  
The printer prints the rolling ASCII text continuously.  
3.  
Press SEL to end the test.  
SETTING UP YOUR PRINTER > 89  
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Hexadecimal Dump Mode  
When the printer is placed in the Hexadecimal Dump Mode, all data  
received, including text and printer commands, is printed in both  
hexadecimal and ASCII formats.  
For example, the following line of BASIC code  
LPRINT CHR$ (27);”0”;CHR$ (30);”THIS IS AN EXAMPLE OF A  
HEXADECIMAL DUMP.”  
would print like this:  
NOTE  
In the ASCII format, all non-printable characters are represented by a  
period.  
To engage the Hexadecimal Dump Mode:  
Make sure paper is loaded.  
1.  
2.  
Turn the printer OFF.  
Hold the SEL and FF/LOAD keys for several seconds while  
turning on the printer.  
To exit the Hexadecimal Dump Mode:  
1.  
Press the SEL key.  
or  
Turn the printer off, then on again.  
SETTING UP YOUR PRINTER > 90  
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INDEX  
Fonts  
Embedded Printer Commands ..65  
A
Auto Carriage return....................34  
Auto LF (Line Feed) ............... 32, 34  
Auto Select .................................32  
Resident..................................77  
Selecting.................................39  
Forms Tear-Off ............................37  
Top of Form .............................19  
B
Bar Codes...................................77  
Bi-directional printing .......... 32, 40  
Bottom Feed ...............................78  
Form Tear-Off ..........................31  
Line Spacing ...........................31  
G
Graphics  
Printing............................ 32, 37  
GROUP, Menu Mode....................28  
Skip Over Perforation...............31  
Buffer  
H
Height, Double Height Printing ....41  
Hexadecimal Dump Mode............90  
High Speed Draft.........................77  
Humidity.....................................79  
Clearing ..................................38  
Receive Buffer Size ..................76  
C
Carbonless continuous forms ......78  
Card Stock..................................78  
Centering printhead position.......65  
Character Pitch ...........................39  
Character Set..............................36  
Character Width..........................39  
Characters Per Second (CPS) .........6  
Computer Connections................86  
I
IBM  
Character Set ..........................36  
Initialization string......................63  
Installing the Ribbon Cartridge ....83  
Interleaf continuous forms ..........78  
Interleaved 2 of 5........................77  
I-Prime .......................... 33, 38, 63  
Italics .........................................41  
E
Electrical Requirements...............79  
Emulations .................................27  
Mode ......................................37  
Envelopes...................................78  
Environmental Requirements.......79  
L
Labels ........................................78  
Length, Page  
Rear Feed ................................31  
Top Feed .................................32  
Limited Operation ................ 38, 67  
Line Spacing...............................38  
F
Font Sample Test ........................88  
> 91  
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Bottom Feed............................31  
Rear Feed ................................31  
Loading Paper.............................87  
I-PRIME Signal.........................63  
Perforation, skip over........... 31, 41  
Pitch, character...........................39  
Postnet.......................................77  
Power Connection .......................85  
Print Method...............................76  
Print Mode..................................39  
Print Registration................. 32, 40  
Print Size....................................76  
Print Speed............................ 6, 76  
Print Suppress..................... 32, 40  
Printhead ...................................76  
Proportional Spacing ..................40  
M
Margin, Bottom.................... 32, 35  
Mean Time Between Failures  
(MTBF).......................................76  
Mean Time to Repair (MTTR) ........76  
Memory, Receive Buffer Size .......76  
MENU light .................................28  
N
Near Letter Quality ......................77  
O
R
Operator Panel Function..............67  
Rear Feed  
Form Tear-Off ................... 31, 32  
Line Spacing............................31  
Skip Over Perforation...............31  
Receive Buffer Size .....................76  
Reliability ...................................76  
Ribbon Shield ................ 43, 65, 84  
Rolling ASCII Test........................89  
RS-232C Serial Interface .............76  
P
Page Length  
Rear Feed ................................31  
Top Feed .................................32  
Page Width  
Bottom Feed............................31  
Rear Feed ................................31  
Setting in the Printer Menu ......32  
Top Feed .................................32  
Paper  
S
Serial Interface Option ................64  
Static ......................................67  
Setting up your Printer ................80  
Thickness................................77  
Widths ....................................32  
Paper Jams .................................66  
Paper Lever.................................66  
Paper Out ...................................66  
Override........................... 32, 39  
Parallel (LPT), IEEE 1284..............86  
Parallel Interface.........................33  
Skip Over Perforation ..................31  
Software  
Embedded commands .............65  
Matching drivers to  
emulations.............................65  
Software vs. printer settings ....63  
Super Speed Draft.......................77  
Symbol Sets ...............................38  
> 92  
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T
U
Uni-directional printing,  
Temperature Specifications.........79  
Testing the Printer ......................87  
Thickness, Paper.........................77  
Time Out.............................. 32, 41  
Top Feed.....................................78  
Bottom Margin ........................32  
Line Spacing ...........................32  
Top of Form.................................34  
Forms Tear-Off.................... 7, 19  
graphics....................................32  
Unpacking ..................................80  
USB, Specification 1.1  
Compliant..................................86  
Utility  
Front Panel Light......................77  
Print Speeds..............................6  
Utility Mode Print Quality .........25  
W
Paper Shield....................... 7, 14  
Typefaces  
Wait Time ...................................32  
Width  
Selecting.................................39  
Character ................................39  
Double width printing ..............41  
Page  
Bottom Feed.........................31  
Rear Feed.............................31  
Top Feed ..............................32  
Paper  
Setting in the Printer  
Menu..................................32  
> 93  
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OKI CONTACT DETAILS  
Oki Systems (UK) Limited  
550 Dundee Road  
Oki Data (Singapore) Pte. Ltd.  
78 Shenton Way, #09-01,  
Singapore 079120  
Slough Trading Estate  
Slough, SL1 4LE  
Tel: (65) 221 3722  
Fax : (65)421 1688  
Tel:44 (0) 1753 819819  
Fax:44 (0) 1753 819899  
Oki Systems (Thailand) Ltd.  
956 Udomvidhya Building 6th  
Floor, Rama IV Rd., Bangkok  
10500, Thailand  
Oki Systems Ireland Limited  
The Square Industrial Complex  
Tallaght, Dublin 24, Ireland  
Tel:+353 1 4049590  
Fax:+353 1 4049591  
Tel : (662) 636 2535  
Fax: (662) 636 2536  
OKI Systems (Ireland) Ltd  
40 Sydenham Park  
Oki Hong Kong Limited  
Suite 1909, Tower3,  
Belfast, BT4 1PW  
China Hong Kong City,  
33 Canton Rd., Tsimshatsui,  
Kowloon, Hong Kong  
Tel:+44 44 (0)28 90 20 1110  
Tel: (852) 2736 0130  
Fax : (852) 2376 3725  
Technical Support for all of  
Ireland:  
Tel : +353 1 4049570  
Fax: +353 1 4049555  
The IPL Group  
63-85 Victoria Street  
Beaconsfield NSW 2015,  
Australia  
Oki Data Corporation  
4-11-22 Shibaura, Minato-ku,  
Tokyo 108-8551, Japan  
Tel : (61) 2 9690 8200  
Fax : (61) 2 9690 8300  
Tel : (81) 3 5445 6158  
Fax : (81) 3 5445 6189  
Comworth Systems Ltd.  
10 Constellation Drive Mairangi  
Bay, Auckland,  
New Zealand  
Tel : (64) 9 477 0500  
Fax : (64) 9 477 0549  
> 94  
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ML5520/21  
Central House  
Balfour Road, Hounslow  
TW3 1HY  
United Kingdom  
tel +44 (0) 20 8219 2190  
Fax +44 (0) 20 8219 2199  
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07044201 Iss.02  

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