Oki 490 manual Printhead Gap

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Printhead Gap

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 blue lever (1) to the recommended setting from the table.

Setting Media

1Regular paper

22-part form (with carbon)

33-part form (with carbon)

44-part form (with carbon)

5Envelopes 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 21

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Contents User’s Guide Mailing Address Safety Microline 490/491 User’s Guide Contents Troubleshooting Printer Features IntroductionOki Data on the Internet Saving Money Forms Tear-Off Helpful HintsSaving Time Internet SupportOperation Tips Controlling Access to the PrinterTop of Form TOF Turning the Platen KnobParts Identification Rear Feed Continuous Forms Using Your PrinterParts Identification Top Feed Single Sheets Top of Form TOF and Forms Tear-Off Top of Form TOFDetermining if Forms Tear-Off is Off or On Forms Tear-Off OFF Default Setting Setting Top of Form TOFForms Tear-Off Set to on Temporarily Changing the Top of Form Position Resetting Top of Form to the Factory DefaultPotential Problems with Software Packages Forms Tear-Off FeatureChanging the Forms Tear-Off Setting Paper ParkManual Forms Tear Off Continuous Forms toSingle Sheets Changing Paper PathsSingle Sheets toContinuous Forms Printhead Gap Print Quality Typefaces LQ Mode Character Pitch Printer Reset EmulationsChanging Emulations Menu Mode Keys Menu ModeEntering and Exiting Menu Mode Resetting the Menu to the Factory DefaultsPrinting the Menu Settings Changing the Menu Settings Group Settings Defaults are set in bold italic Menu Settings Table13.6 500 ms, 1 sec, 2 sec DEFAULT, Mode 1, Mode Invalid, Valid Menu Settings Table Explanations of Menu Items Use this to switch character sets to IBM Set Selects the printer command set emulation you want to engage Sets the signal on pin 18 to +5 volts or open Choose the quality and typeface of printing Change to Double for double width and height printing Replacing the Ribbon Cartridge MaintenancePrinthead may be HOT Rear Feed Loading PaperCareful Open the tractor covers Microline 490/491 User’s Guide Maintenance Loading Rear Feed Paper from the Front of the Printer ML490ML491 Microline 490/491 User’s Guide Maintenance Top Feed Single Sheets Maintenance Rear-Feed Paper Jams Clearing Paper JamsRear-Feed, Repeating Paper Jams Microline 490/491 User’s Guide Single-Sheet Paper Jams Cleaning the Housing General Information TroubleshootingSolution Problems / SolutionsSolutions Ink smears on the paper when I print narrow columns There are dots missing in my printouts Printer needs paper. The Alarm is not on. I can’t load paper Purchasing Parts & Accessories Appendix a Parts & AccessoriesPart Number Replacement PartsOption Part Number AccessoriesAppendix B Printer Control Codes Epson LQ CommandsDEL Enabled On DC3 Carriage Return Character Pitch, Select 10 cpi ESC % H IBM CommandsESC Q $ Appendix C Specifications Emulations co-resident Graphics ResolutionPrint Speed Characters per Line cplResident Fonts Bar CodesResident Typefaces Paper Specifications ML490 Paper Specifications ML491 Physical Specifications Environmental RequirementsElectrical Requirements Appendix D Installation LocationUnpack Microline 490/491 User’s Guide Installation Install the Ribbon Cartridge Power Connection Computer ConnectionsParallel LPT Ieee USB Specification 1.1 Compliant Font Sample Test Testing the PrinterRolling Ascii Test Printer Drivers Hexadecimal Dump ModeLoading the OKI Driver Using a Compatible DriverIndex IBM Index Tear