HP C7769B Service Manual - Page 119

Print Quality Troubleshooting Procedure Flowchart START HERE Printer checks whether Printhead Alignment has recently been done Printhead Alignment hasn't been done recently Printer recommends Aligning Printheads Printhead Alignment has been done recently No Printer prints Are all black lines in Diagnostic Print A Diagnostic Print A straight? Yes If possible, Printer No tries to Clean Printheads If Printheads have been cleaned 3 times, the Printer recommends that you Replace Printheads Printer prints Diagnostic Print B No Printer recommends Advance Calibration Are the colored blocks in Diagnostic Print A OK? Yes (all OK) Printer checks whether the Printheads have been cleaned recently Are the colored patterns in Diagnostic Print B OK? Yes (all OK) No Yes No problems detected If possible, Printer tries to Clean Printheads If Printheads have been cleaned 3 times, the Printer recommends that you Replace Printheads HP DesignJets 500 and 800 Series Printers Service Manual 6-7