Craden Peripherals DP8 technical manual Ribbon Shield Removal / Replacement

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5.4.1.1 Ribbon Shield Removal / Replacement

The ribbon shield prevents ribbon fabric from rubbing on and smearing printed media. It is a consumable. Replace the shield every four to five ribbon replacements or when it is damaged.

Lifter

Ring

Tabs

Pull the ribbon guide plate tabs toward you. Insert the new shield tips into the gap between the ribbon guide plate and the carriage

Rotate the shield until it is centered on the carriage. Do not let the shield tips slip behind the carriage.

Push the shield up until it stops. Install the ribbon cartridge and lower the carriage.

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Contents R I P H E R a L S R P O R a T I O N RevisionAirport HIGHWAY, PENNSAUKEN, NJ Record of Changes Pages AffectedALL DP8 & DP9 Technical Manual Table of Contents OperationMaintenance Theory of OperationTroubleshooting Recommended Spare Parts Recommended Service ToolsMajor Assembly Illustrations & Parts Lists Document Characteristics Physical CharacteristicsInterface Environment & StandardsInstallation Procedure Reshipment Operation Ribbon Cartridge LoadingKeypad Operation Display OperationKeypad & Display Panel Configuration Configuration Category PressDocument Insertion Printer Parameters DisplayRemarks Communication Parameters Override ParametersDisplay Remarks Service Parameters Diagnostics Power Up DiagnosticsEnhanced Diagnostics Error Conditions Document JamCarriage Fault Self TestCommand Summary Hex CommandProgramming AsciiESC H ESC KESC L ESC RPrint Commands Stops double height print Low Density Graphics Commands High Density Graphics CommandsDisplay Commands DC3Configuration Commands Status and Keypad CommandsDP XE DJ KB BZ BA Installing Craden Drivers on Windows 95 or AsciiMeaning DriversInstalling Craden Drivers on Windows NT, 2000 or XP Installing Craden USB Drivers on Windows NT, 2000 or XPUsing Printer Resident Device Fonts Writing to the Printer LCD Display InterfacingFunct Input Buffer OperationInterface Signals & Cables Pin Signal DescriptionPrinter Pin PC-25 Pin PC-9 Pin Signal Problem SolvingCarriage Fault or No Carriage Motion Rollers Run at Power-Up or After Document EjectedNo Document Motion No Printing or Light PrintingCarriage Drive Assembly Document Drive AssemblySwitching Power Supply Theory of Operation OverviewKeypad/Display Assembly Main Printed Circuit BoardMicroprocessor System Stepper Motor DriversPhase a I0A I1A Phase B I0B I1B Current Stepper Motor Drive Circuit U20 15 aKeypad and Display Refer to Schematic #72135 Printhead DriversSensors Character PrintingI L Printhead Drive CircuitMaintenance Lubrication and Cleaning 5.1.1 LubricationDocument Feed Roller Cleaning Sensor CleaningPrinthead Cleaning Document Print Area CleaningCabinet Exterior Cleaning Harsh, abrasive cleanersService Parameter SET-UP Procedure Electrical AdjustmentsMechanical Adjustments 5.4.1 Printhead Gap Ribbon Shield Removal / Replacement Ribbon Shield Face Inspection Carriage Drive Belt Tension Document Drive Belt TensionCarriage Shaft Cam and Shaft Rack Rear Document Roller Spring ForceAuto Alignment Gate Ramp Auto Alignment Gate HeightReplacement Procedures Front Document Roller Spring ForceAuto Alignment Skew Sensor Calibration CabinetPower Supply PCB Sensor PCBKeypad DisplayDocument Motor PrintheadCarriage Drive Belt Document Drive BeltTroubleshooting Basic Troubleshooting ProcedureNo Display Defective KeypadDefective Sensor No Document MotionNo Carriage Motion Symptom Condition Remedy No Print or Light PrintPrint Quality Missing Dots Erratic Document Feed or MispositioningErratic Character Spacing or False Document Jams Interface InoperativeDiagnostic Flowchart Use this flow chart to assist in troubleshootingRecommended Service Tools Recommended Spare PartsDescription PART# Printer Diagram DP8 & DP9 Assembly Tree DWG REV. CAll assemblies not ending in X are used both on DP8 and DP9 Page Page Page Page Page Page Page