HP C7769B Service Manual - Page 83

Service Tests and Utilities Service Utilities The following is a list of all internal Service Utilities available in the Printers. Instructions for entering the Service Utilities menu are given on Page 4-14. 1 EEROM Setup ⇒ Page 4-16 The purpose of this Service Utility is to modify identification parameters such as serial and model numbers, as well as the Font Type. This only needs to be performed when EEROM failures cannot be recovered where both the current EEROM (located in the Main PCA) and the backup EEROM (located in the Ink Supply Station) contain false values or because both of them have failed. 2 Turn Drive Roller ⇒ Page 4-21 The purpose of this Service Utility is to rotate the Drive Roller in order to clean it. 3 Unlock Carriage ⇒ Page 4-22 The purpose of this Service Utility is to unlock the Carriage Assembly which is normally locked by the Service Station in order to cap the Printheads. Once unlocked, the Carriage Assembly can then be moved freely along the Printer by hand. 4 Prime Tubes ⇒ Page 4-23 The purpose of this Service Utility is to prime the Ink Supply Tubes after they have been replaced (or if a situation arises where you need to force the priming procedure). 5 Change Cutter ⇒ Page 4-24 The purpose of this Service Utility is to move the Cutter Assembly to a position where it can be replaced. 6 Change Ink Tubes ⇒ Page 4-25 The purpose of this Service Utility is to move the Carriage Assembly to a position where it makes the removal of the Ink Supply Tubes much easier. 7 Printer Information ⇒ Page 4-26 The purpose of this Utility is the following: n Report basic parameters for call qualification. n Identify potential problems. HP DesignJets 500 and 800 Series Printers Service Manual 4-13