User’sGuide59348301
10Note: For rear feed, the paper lever must be forward.Chapter 3: Using Your PrinterParts Identification: Rear Feed(Continuous Forms)Note: The serial
Using Your Printer 11Parts Identification: Top Feed(Single Sheets)Paper GuidesSheet GuidePaper LeverOn-Off SwitchPlaten KnobControl PanelAcoustic Cove
12 Microline 420/421 User’s GuideTop of Form (TOF)Important!If you turn the platen knob when the printer is on, the Top ofForm misaligns. Always shut
Using Your Printer 13Determining if Forms Tear-Off is Off or OnThere are two ways to determine the status of the FormsTear-Off menu setting:• Print th
14 Microline 420/421 User’s GuideSetting Top of Form (TOF):Forms Tear-Off OFF (Default Setting)Important!If you turn the platen knob when the printer
Using Your Printer 15Setting Top of Form (TOF):Forms Tear-Off Set to ONImportant!If you turn the platen knob when the printer is on, the Top ofForm mi
16 Microline 420/421 User’s GuideTemporarily Changing the Top of FormPositionImportantDo not use the platen knob to change the Top of Form. If youturn
Using Your Printer 17Forms Tear-Off FeatureNote: This feature is normally turned off. To use FormsTear-Off, you must enter the menu and change thesett
18 Microline 420/421 User’s GuideChanging the Forms Tear-Off SettingNote: The default setting for Forms Tear-Off is OFF.To change the Forms Tear-Off s
Using Your Printer 19Changing Paper PathsContinuous Forms to Single Sheets1 Tear off any printed pages, then press PARK.2 Raise the sheet guide (1) to
2Every effort has been made to ensure that the information inthis document is complete, accurate, and up-to-date. Oki Dataassumes no responsibility fo
20 Microline 420/421 User’s Guide4 Move the paper lever to the appropriate position.• Rear feed:• Bottom feed:5 If necessary, load continuous-form pap
Using Your Printer 21To adjust the gap, open the access cover and move the bluelever (1) to the recommended setting from the table.Setting Media1 Regu
22 Microline 420/421 User’s GuidePrint QualityImportant!Front panel settings for print quality and character pitch arenormally overridden by software
Using Your Printer 23Epson and IBM EmulationsSet the character pitch by pressing CHARACTER PITCH (1)until the light beneath the desired setting is lit
24 Microline 420/421 User’s GuidePrinter ResetClearing some error conditions requires that you reset(reinitialize) the printer. To do this:1 Press and
25Chapter 4: Menu ModeGROUP KeyPrints the next Group in the Menu.With the SHIFT key, prints the previous Group.ITEM KeyPrints the next Item in the Gro
26 Guide de l’utilisateur Microline 420/421Entering and Exiting Menu ModeTo enter or exit the Menu Mode, hold SHIFT while pressingSEL.Resetting the Me
Mode Menu 27Changing the Menu SettingsNote: Please print the current Menu Mode settings before youreset or change them. This is the only way to have a
28 Guide de l’utilisateur Microline 420/421Menu Settings TableFor a complete explanation of each menu item, see “Explanations of Menu Items” later in
Mode Menu 29Menu Settings Table (Continued)Group Item Settings (Defaults are set in bold italic)Rear Feed Line Spacing 6 LPI, 8 LPIForm Tear-Off Off,
3SafetyYour Oki printer has been carefully designed to give you yearsof safe, reliable performance. As with all electrical equipment,there are a few b
30 Guide de l’utilisateur Microline 420/421Menu Settings Table (Continued)Group Item Settings (Defaults are set in bold italic)Top Feed Line Spacing 6
Mode Menu 31Menu Settings Table (Continued)Group Item Settings (Defaults are set in bold italic)Setup (cont..) Print Registration 1 0, range to 0.25 m
32 Guide de l’utilisateur Microline 420/421Menu Settings Table (Continued)Group Item Settings (Defaults are set in bold italic)SI Select Pitch (10 cpi
Mode Menu 33Menu Settings Table (Continued)Group Item Settings (Defaults are set in bold italic)Serial IF* Parity None, Odd, EvenSerial Data 7/8 Bits
34 Guide de l’utilisateur Microline 420/421Menu Settings Table (Continued)Group Item Settings (Defaults are set in bold italic)CSF Bin 1* Line Spacing
Mode Menu 35Explanations of Menu ItemsThese explanations are in alphabetical sequence to make iteasier to look them up. Some items only appear when op
36 Guide de l’utilisateur Microline 420/421Bottom Margin, Default = ValidChange to Invalid if you want the printer to ignore the bottommargin setting.
Mode Menu 37CSF Type, Default = WideTo avoid paper jams, change this setting to Narrow if you areusing the optional Cut Sheet Feeder on the wide model
38 Guide de l’utilisateur Microline 420/421I-Prime, Default = Buffer PrintDetermines what the printer will do when it receives theI-Prime signal from
Mode Menu 39Page Width, Default = Depends on Feed PathWide carriage model only.For rear and bottom paths, the default is 13.6". Change to 8"
4 Microline 420/421 User’s Guide• Unplug the printer before you clean it. Use only a dampcloth. Do not use liquid or aerosol cleaners.• To protect you
40 Guide de l’utilisateur Microline 420/421Print Mode, Default = UtilityChoose the quality and typeface of printing. Switch to NLQCourier or NLQ Gothi
Mode Menu 41SI Select Pitch 12 cpi, Default = 20 cpiIBM emulation only. Sets the pitch to be engaged when theprinter control panel is set for 12 cpi a
421 Make sure the printer is turned OFF.2 Open the access cover and center the printhead.Chapter 5: MaintenanceReplacing the Ribbon CartridgeImportant
Maintenance 43CAUTION!The printhead may be HOT!3 Swing the used ribbon cartridge up off the printhead, lift itout, and discard it.4 Unpack the new rib
44 Microline 420/421 User’s GuideLoading Rear Feed Paper from the Back of the PrinterNote: These instructions assume you have ready access to theback
Maintenance 454 Pivot the sheet guide forward and gently rest it against theroller assembly.Careful!If you push the sheet guide too hard against the r
46 Microline 420/421 User’s Guide6 Open the lock levers (1) and move the right tractor (asviewed from the back of the printer) to the reference mark(2
Maintenance 478 Place continuous forms paper on the first two pins of eithertractor.Important!You must keep the number of paper holes engaged on eithe
48 Microline 420/421 User’s Guide11 Lower the sheet guide and slide it toward the front of theprinter until the marks align.12 Place the wire guide (“
Maintenance 49Loading Rear Feed Paper from the Front of the PrinterNote: These instructions assume you do not have ready accessto the back of the prin
5ContentsSafety... 3Chapter 1: Introduction ...
50 Microline 420/421 User’s GuideNote: The movement of the left tractor (as viewed from thefront of the printer) is restricted to ensure that thepaper
Maintenance 518 Adjust the position of the right tractor to center the holes inthe paper on the pins. Then, close its tractor cover and pushback the l
52 Microline 420/421 User’s Guide10Place the wire guide (1) in the sheet guide on the pull-uproller assembly.11 Press FF/LOAD.Note: The factory defaul
Maintenance 533 Open the acoustic cover (1) and raise the sheet guide to thesingle-sheet position. Pivot the wire feed guide (2) up intothe sheet guid
54 Microline 420/421 User’s Guide4 Adjust the paper feed guides (1) for the width of the paper,then place a sheet of paper in the separator. The paper
Maintenance 55Clearing Paper JamsRear-Feed Paper Jams1 Turn off the printer.2 Use the platen knob to back the paper all the way out of theprinter.CAUT
56 Microline 420/421 User’s GuideBits of Paper Stuck in the Paper Path1 Turn off the printer.2 Use the platen knob to back the paper all the way out o
Maintenance 574 Remove any torn pieces of paper.5 Fold some continuous-form paper over three times to make apage four sheets thick. Then, load it on t
58 Microline 420/421 User’s GuideSingle-Sheet Paper Jams1 Turn off the printer.2 Use the platen knob to back the paper out.3 Open the access cover (1)
Maintenance 59Cleaning the HousingYou should clean the printer housing every six months (or afterabout 300 hours of operation).CAUTION!Never use stron
6 Microline 420/421 User’s GuideChapter 4: Menu Mode ... 25Menu Mode Keys ...
60Chapter 6: TroubleshootingGeneral InformationHere are some general things to check before proceeding withdetailed troubleshooting.• Is the printer p
Troubleshooting 61Problems / SolutionsProblemMy word processor files do not print the way I have the menuand front panel set.SolutionRemember:• Settin
62 Microline 420/421 User’s GuideProblemThe printer does not print when the computer sends data.Solutions1 Is the SEL light on? If not, press the SEL
Troubleshooting 63ProblemInk smears on the paper when I print narrow columns.SolutionThis may be caused by excessive printhead travel from thecenterin
64 Microline 420/421 User’s GuideProblemThere are dots missing in my printouts.SolutionThe head gap may not be set correctly. Try moving the headgaple
Troubleshooting 65ProblemThe printer needs paper. The ALARM is not on and I can’t loadpaper.Solution1 Press and release the SEL key.2 Press and hold t
66Appendix A: Parts & AccessoriesPurchasing Parts & AccessoriesBefore you purchase, know your printer model number (see thefront of the unit)
Accessories 67Replacement PartsItem Part NumberBoth ModelsRibbon Cartridge () ------------------------------- 42377801Platen Knob () -----------------
68 Microline 420/421 User’s GuideAccessoriesOption Part NumberModel ML420Pull Tractor, Top-Mount ()----------------------- 70030501Push Tractor, Botto
69Appendix B: Printer Control CodesThis section lists the most commonly used printer controlcodes.You will find a comprehensive listing of the control
7Chapter 1: IntroductionOki Data on the InternetThe Oki Data Web Sites provide the most current informationavailable on your printer.On-line documents
70 Microline 420/421 User’s GuideIBM Proprinter III Commands(continued)IBM Command ASCII DecimalDouble Width On ESC W 1 27 87 49Double Width Off ESC W
Control Codes 71IBM Proprinter III Commands(continued)IBM Command ASCII DecimalOverscore On ESC _ 1 27 95 49Overscore Off ESC _ 0 27 95 48Paper Out Se
72 Microline 420/421 User’s GuideEpson FX CommandsEpson Command ASCII DecimalBackspace BS 8Carriage Return,Execute CR 13Character PitchSelect 10 cpi E
Control Codes 73Epson FX Commands (continued)Epson Command ASCII DecimalForm Lengthn Inches (n = 1 to 22) ESC C NUL n 27 67 0 nn Lines (n = 1 to 127)
74 Microline 420/421 User’s GuideEpson FX Commands (continued)Epson Command ASCII DecimalPrint Quality/FontSelect HSD/SSD(depends on settingfor Draft
Control Codes 75Oki MICROLINE StandardCommandsOki Command ASCII DecimalBackspace BS 8Carriage Return CR 13Character PitchSelect 10 cpi RS 30Select 12
76 Microline 420/421 User’s GuideOki MICROLINE StandardCommands (continued)Oki Command ASCII DecimalLine Feed Commandsw/ Carriage Return LF 10w/o Carr
Control Codes 77Oki MICROLINE StandardCommands (continued)Oki Command ASCII DecimalShift-In SI 15Shift-Out SO 14Software I-Prime ESC } NUL 27 125 0Sub
78Appendix C: SpecificationsNote: Specifications are subject to change without notice.Print MethodImpact dot matrixPrinthead9 pins, 0.30 mm (0.0118&qu
Specifications 79Emulations (co-resident)• IBM Proprinter III• Epson FX• Oki MICROLINE StandardPrint SpeedSpeedMode (Characters per Second)Super Speed
8Chapter 2: Helpful HintsSaving TimeInternet SupportOki Data provides support via the Internet:•www.okidata.com is the main web site, the gateway to O
80 Microline 420/421 User’s GuideGraphics ResolutionMax. ResolutionEmulation Density (Dots per inch)IBM, Epson Single 60 x 216 dpiDouble 120 x 216 dpi
Specifications 81Paper Specifications: ML420Single (Cut) SheetsFeed: Top OnlyWeight: 14 to 24 lb. US Bond (52.6 to 90 g/m2)Width Range: 7.2" to 8
82 Microline 420/421 User’s GuidePaper Specifications: ML421Single (Cut) SheetFeed: Top OnlyWeight: 14 to 24 lb. US Bond (52.6 to 90 g/m2)Width Range:
Specifications 83Environmental RequirementsTemperatureOperating: 41 to 95°F (5 to 36°C)Storage: 14 to 122°F (-10 to 50°C)HumidityOperating: 20 to 80%
84Appendix D: InstallationLocation• Place your printer on a firm, solid surface.• Allow enough space around the printer to easily access theplaten kno
Installation 851 Remove any packing tape, then grasp the tabs (1) at eitherend of the access cover and pivot it toward the front of theprinter as far
86 Microline 420/421 User’s Guide4 Use the tabs (1) to lift and remove the sheet guide, thenremove the shipping restraint.5 Reinstall the sheet guide:
Installation 87CAUTION! The printhead may be HOT!3 Unpack the new ribbon cartridge and install it on theprinthead.Important!Do not remove the ribbon s
88 Microline 420/421 User’s GuidePower Connection1 Make sure both the printer and the computer are OFF.2 Plug the power cord into the back of the prin
Installation 89USB: Specification 1.1 Compliant• Requires USB 1.1 cable, maximum length 19.7 ft. (5 m), notsupplied.• Printer has USB “B” receptacle.1
Helpful Hints 9Operation TipsTop of Form (TOF)Top of Form (TOF) sets the print start position. The factorydefault is 1" from the top.The Top of F
90 Microline 420/421 User’s GuideTesting the Printer• Font Sample Test• Rolling ASCII Test• Hexadecimal Dump ModeFont Sample TestImportant!Wide carria
Installation 91Rolling ASCII TestImportant!Wide carriage Model ML421: If you are using 8.5" paper torun the tests, make sure the paper width sele
92 Microline 420/421 User’s GuideHexadecimal Dump ModeWhen the printer is placed in the Hexadecimal Dump Mode, alldata received, including text and pr
Installation 93Loading the OKI DriverParallel Interface1 Insert the CD into your CD-ROM drive.Note: If the CD does not AutoPlay, click Start Run Bro
94AAccessories ...68Alignment problems ... 9ASCII Test ...
Index 95FFactory defaults, menu mode ... 26Font Sample Test ... 90FontsEmbedded Printer Commands ...
96 Microline 420/421 User’s GuideOOki MICROLINE StandardCommands.... 75–77Operator Panel Function ...
Index 97SSelf Tests............ 90Serial Interface........... 68Serial Interface Opt
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