Zebra Technologies GC420t manual Maintenance

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Maintenance

Replacing the Printhead

3.Use the spring to pry the printhead clip off the right side of the carriage.

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4.Pull the printhead and bracket forward.

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5.Use a #2 Phillips driver to remove the screw that holds the ground wire.

P1052686-001

GC420t™ User Guide

5/22/2012

Image 74

Contents Zebra GC420t P1052686-001 GC420t User Guide 22/2012 Iii FCC Compliance Statement Contents About This DocumentWho Should Use This Document How This Document Is OrganizedContacts Mail Back Technical LibraryDocument Conventions Icons UsedContents Print Operations Appendix Dimensions P1052686-001 GC420t User Guide 22/2012 Introduction GC420t Thermal Printers What’s in the Box? Unpack and Inspect the PrinterYour Printer Opening the printerPrinter Features Operator Controls Power Switch Feed Button Status LightClosing the printer Contents Getting StartedAttaching Power Loading Roll Media Preparing MediaPlacing the Roll in the Media Compartment Loading Roll Media Guides Loading Transfer Ribbon Loading Transfer Ribbon Loading Transfer Ribbon Loading Transfer Ribbon Printing a Test Printer Configuration Label Pre-install Windows Printer Drivers Universal Serial Bus USB Device Communications Serial Port and Windows operating systemsConnecting your Printer to a Computer Interface Cable RequirementsUSB Interface Requirements Serial Communications AutobaudEPL Y Command Parallel Port Testing Communications by Printing After Your Printer is ConnectedAfter Your Printer is Connected Print Operations Thermal Printing Determining Printer ConfigurationLong Term Printer In-activity or Storage Modes of Printing Print Media TypesTypes of Media Roll and Fanfold Media Adding a New Transfer Ribbon Replacing SuppliesDetermining Thermal Media Types Replacing a Partially Used Transfer Ribbon Adjusting the Print WidthAdjusting the Print Quality Media Sensing Coated Side of Ribbon When to Use RibbonRibbon Overview Ribbon Test with Adhesive Ribbon Scratch TestPrinting on Fan-Fold Media Printing on Fan-Fold Media Printing with Externally Mounted Roll Media Externally Mounted Roll Media ConsiderationsFonts and Your Printer Localizing the Printer with Code PagesIdentifying Fonts in Your Printer ZPL FontsStand Alone Printing Sending Files to the Printer Print Meter Printer Options Label Dispenser Option XA MMP XZLabel Dispenser Option Label Dispenser Option Zebra KDU Printer Accessory KDU Plus Printer Accessory ZBI 2.0 Zebra Basic Interpreter ZBI 2.0 Zebra Basic Interpreter Maintenance Cleaning See Cleaning the Printhead onCleaning the Printhead Media Path Considerations Sensor Cleaning Platen Cleaning and Replacement Maintenance Other Printer Maintenance Replacing the Printhead Maintenance Unplug both bundles of printhead wires from their connectors Maintenance Troubleshooting Status Light Descriptions Status Light Error Resolutions Ribbon is out Printhead is over temperatureMedia is out Printhead is openPrinted image does not look right Print Quality ProblemsNo print on the label Print Quality Problems Is the printer in pause mode? If so, press the Feed button Manual Calibration Recalibration Troubleshooting TestsPrinting a Configuration Label Resetting the Factory Default Values Communications DiagnosticsCommunications Diagnostics Feed Button Modes Flash Sequence ActionPower On Modes Feed Button Modes Appendix Interface Wiring Universal Serial Bus USB Interface Parallel Interface HostConnecting the Printer to a DCE Device Serial Port InterfaceAppendix Dimensions External GC420t Printer Dimensions Optional Label Dispenser External GC420t Printer Dimensions Appendix ZPL Configuration Managing the ZPL Printer Configuration ZPL Printer Configuration FormatZPL Configuration Status to Command Cross-reference Configuration Label PrintoutDefault 65536k.......B only displays this if installed Printer Memory Management and Related Status Reports ZPL Programming for Memory Management~WC Printer Memory Management and Related Status Reports