HP 1050c Service Manual - Page 70

HP No.80 Ink Supplies Troubleshooting Front panel displays Ready/Replace Draft Normal Best Print Quality is Affected Print Quality is maintained but the printer changes the printing process to compensate for an ageing printhead. Subsequently the printer will print slower. Printer will try to compensate for an ageing printhead Speed not affected Speed is affected Speed not affected Replace Printhead The front panel displays a warning, meaning that the printhead has quite a few nozzles operating incorrectly. There is a risk that media could be wasted. The printer will stop at the beginning of every print job and the front panel will display: Warning! Printhead quality degrading select YES to replace failing printheads YES (Replace) NO (Continue) Failed NOTE Press the ↓ or ↑ down key to select YES or NO. Press the Enter key. If you select YES the print job will be cancelled and a replacement will be started. If you say NO, the printer will continue printing. Next time you print, the same message will appear until you select YES (Replace). This message generally indicates that the printhead must be replaced. This situation must be corrected before the printer will operate. However, this problem may be corrected as follows: 1 Reseat the printhead. 2 Clean the Carriage and Printhead flex circuits using the Carriage Interconnect Wiper ⇒ Page 3-18. 3 If after reseating and cleaning the printhead, the failed message disappears but then reappears later, replace the printhead. If all 4 Printheads have the Status "Failed", it is possible that the Carriage Assembly is faulty. 3-14 HP DesignJets 1050C and 1055CM Printers Service Manual