HP V8.5 manual Cleaning the thermal printhead

Page 58

6

M A I N T E N A N C E

Cleaning the thermal printhead

After prolonged use, the thermal printhead picks up fibres from the media passing under it. These fine fibres collect and compact on portions of the printhead, blocking the contact it makes with the paper during a plot and causing faded patches. Poor contact between the printhead and paper may also cause the affected heating elements (nibs) to fail prematurely because of improper heat dissipation to the paper.

Clean the printhead every time you install a new roll of paper or film.

1. Turn the plotter power off.

Figure6-1

Print Head

6 -4	V8.5eRev2.2.2002

Image 58

Contents V8.5 Thermal Plotter Disclaimer Copyright NoticeTrademarks HaftungsausschlussPage Iii V8.5eRev2.2.2002 Limitation of Liability Contents Operation Maintenance AppendicesV8.5eRev2.2.2002 General Description Media DescriptionAbout this Manual Functional OperationSpecification S Media Electrical TransportInterface Physical EnvironmentalInstallation UnpackingMounting and Positioning Interface Setup Media InstallationInstalling rolled paper Back Panel Roll paper and film path Opening the plotter Lid Installing fan-fold paper Installing rolled film Spindle blocks Power Supply Precautions E R a T I O NUsing the Control Panel Control panelControl panel button functions Rev2.2.2002 Control Panel Functions and Settings Changing function settingsTestplot Default SettingsContrast Speed Media Scaling MenusettingsareF2, F4, F8, tF,PF Emulation vertical resolutionForm feed length E R a T I O N Menusettingsare b1, b2, g1, g2, g3, and g4 Bytes per scanSetup headers for programming the V8.5e Grayscale media table numberSA=4B E R a T I O N Error Messages Byte Line feedFehlermeldungen Power supplies Plotter Functions and FeaturesIntroduction T I O N Stepper motor Interface timing and signalsInterface Data Transfer Clear Data rates Minimum data ratesVerticalresolution Scan widthPrint mode Mode signalsAutomatic Head Temperature Feedback Thermal PrintheadFilm media Media SensorsMaintenance Maintenance Guidelines I N T E N a N C ERegular Maintenance Cleaning the thermal printhead Cleaningtheplatenroller Replacing the fuse Troubleshooting Problems Plotter does not plotPlot has vertical white stripes PlotwithverticalwhitestripesPlot is blotchy or faded Plot contrast is weak Solution PlothasblackverticallinesPlot is wrong length Paper is wrinkling or tearing along one edgePlotter has no power Can’t make changes to control panel settingsPlot output speed is erratic Bloomingplot Form feed stops before desired length Form feed does not stop at top-of-form marksPlot is skewed or unreadable SkewedplotR R a N T Y R R a N T Y C I I T a B L E S Interface Connector PIN Assignment TableB-2. Centronicscablepinoutsstraightthrough Centronics Interface Board Centronics Interface Board Centronics Interface Board