![]() ![]() ![]() When a single color cartridge is changed, some ink is also consumed from the other color ink cartridges using the same print head. When removing these air bubbles, some ink is also removed.On IIC systems, multiple colors may use the same print head. Air bubbles can be removed by pumping them out of the print head. In some IIC printers, air bubbles can be caused by an ink cartridge change. Tiny bubbles of air form in the ink over time and can block the flow of ink in long-life print head printers (IIC). To keep the printer ready to print in either color or black, these service routines typically consume some ink from every cartridge, even if only black or color is used in the document being printed. Nozzles are kept clean by servicing, including wiping the surface with a small rubber wiper, ejecting ink through the nozzles to purge particles and to prevent drying, and pumping with ink to clean the print head. Print head nozzles get clogged over time, most commonly by microscopic dust particles or dried ink. The printer is out of warranty and I am stuck, any help would be very much appreciated.įor reference I have looked and followed these support pages but for many of the suggestions I am unable to check as cant print the reports. Many of the troubleshoot pages recommend changing the print heads but this is an expensive gamble, especially as I cannot even print the alignment reports to check which one. I had a look at the print heads but now I keep getting "alignment failure". Once I changed the cartridge (genuine) still no luck. Initially the Yellow ink cartridge was low so I assumed it needed changing, even whilst low I could not print Black ink only. I have searched this forum and tried following previous advice, I have tried connecting via LAN, wireless, USB and Installed the latest drives along with the official software. Cant print from my laptop to my Officejet Pro 8500a Plus, I only get blank pages which includes printing all diagnostic pages. ![]()
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