HP C7769B Service Manual - Page 64

Ink Supplies Troubleshooting used is below 100%) and the maximum recovery action was also performed (P/H cleaning code is 3). Therefore the conclusion is that the Printer is causing the Printheads to fail. In this situation, to resolve the problem, try the following: 1 Check the amount of ink used by the Printhead (Page 3-10, Obtaining Printhead Information). If the amount of ink used by the Printhead is less than 1 Ink Cartridge (69 cc), then replace the Ink Cartridge for that color. 2 Check if the Ink Supply Station is faulty by performing the Ink Supply Station test ⇒ Page 4-6. If the test fails, replace the Ink Supply Station ⇒ Page 8-48. 3 Use the printer Information utility to check the usage of the Service Station ⇒ Page 4-26. If the usage of the Service Station is close to 100% then replace the Service Station ⇒ Page 8-52. 4 Check if the Ink Supply Tubes are faulty by installing new Start-up Printheads into the Carriage and see if ink flows to them (you will need to perform the Prime Tubes Utility ⇒ Page 4-23). If the ink DOES NOT flow to the Start-up Printheads, replace the Ink Supply Tubes ⇒ Page 8-60. Is the User Replacing the Printheads too Early? In the same way that you can determine if the Printer is causing failures in the Printheads, you can determine if the customer is replacing the Printheads before the minimum life expectancy has been reached without performing the maximum recovery action (Troubleshooting procedure). If the user replaces the Printhead without performing a recovery action, the Printhead will be marked 0. If the user replaces the Printhead after only performing Levels 1 or Level 2 recovery action, the Printhead will be marked 1 or 2. If a customer complains about having to replace the Printheads frequently before the minimum life expectancy has been reached due to poor print quality, using the information obtained with the Printhead History Utility you can determine if the Customer is replacing the Printheads too early as follows: 1 Enter the Printhead History Utility and Select the color of the Printhead that is experiencing the replacement problem. In the 3-18 HP DesignJets 500 and 800 Series Printers Service Manual