HP 1050c Service Manual - Page 119

Service Calibrations Service Calibrations The following is a list of all internal service calibrations available in the Printers. Instructions for entering the service calibrations menu are given on Page 5-4. 1 Accuracy Calibration ⇒ Page 5-6 The purpose of this Service Calibration is to calibrate the nominal advance of the media. This calibration is necessary to control the exact movement of the media in order to avoid print quality problems like banding. 2 Line Sensor ⇒ Page 5-9 The purpose of this Service Calibration is to calibrate the intensity of the line sensor in the Carriage PCA. An incorrect calibration can result in edge-detection failures during media loading and incorrect reading of prints that are used for alignment or calibration. 3 Service Station ⇒ Page 5-11 The purpose of this Service Calibration is to calibrate the Service Station in relation to the Carriage Assembly. 4 Roller Mark Position ⇒ Page 5-13 The purpose of this Service Calibration is to calibrate the Mark Encoder which is located on the Drive Roller. 5 Pen to Paper Spacing ⇒ Page 5-15 THIS CALIBRATION IS NO LONGER REQUIRED. 6 Color to Color Calibration ⇒ Page 5-16 The purpose of this Service Calibration is to correct the alignment between the Printheads and the rest of the Printer. This calibration is necessary in order to prevent color misalignment. 7 Calibrations Backup ⇒ Page 5-19 The purpose of this Service Calibration is to allow the EEROM contents to be saved when the Electronics Module or the Tubes System is replaced. 8 Pen Alignment ⇒ Page 5-22 The purpose of this Service Calibration is to correct the alignment between the Printheads. This calibration is necessary in order to prevent color misalignment and print quality defects like banding. u Carriage Height Calibration ⇒ Page 5-24 The purpose of this Service Calibration is to adjust the distance between the Carriage and the Center Platen. This calibration is necessary in order to prevent problems like Printhead crashes. HP DesignJets 1050C and 1055CM Printers Service Manual 5-3