Oki 490 manual Troubleshooting, General Information

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Chapter 6: Troubleshooting

General Information

Here are some general things to check before proceeding with detailed troubleshooting.

•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?

•Does the paper being used meet the specifications for this product?

•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.

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Contents User’s Guide Mailing Address Safety Microline 490/491 User’s Guide Contents Troubleshooting Oki Data on the Internet Printer FeaturesIntroduction Internet Support Helpful HintsSaving Money Forms Tear-Off Saving TimeTurning the Platen Knob Controlling Access to the PrinterOperation Tips Top of Form TOFParts 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 FeatureManual Forms Tear Off Changing the Forms Tear-Off SettingPaper Park Continuous Forms toSingle Sheets Changing Paper PathsSingle Sheets toContinuous Forms Printhead Gap Print Quality Typefaces LQ Mode Character Pitch Changing Emulations Printer ResetEmulations Menu Mode Keys Menu ModePrinting the Menu Settings Entering and Exiting Menu ModeResetting the Menu to the Factory Defaults 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 Characters per Line cpl Graphics ResolutionEmulations co-resident Print SpeedResident Typefaces Resident FontsBar Codes Paper Specifications ML490 Paper Specifications ML491 Electrical Requirements Physical SpecificationsEnvironmental Requirements Unpack Appendix D InstallationLocation Microline 490/491 User’s Guide Installation Install the Ribbon Cartridge Parallel LPT Ieee Power ConnectionComputer Connections 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