HP C7769B Service Manual - Page 91

NOTE Service Tests and Utilities Turn Drive Roller The purpose of this Service Utility is to rotate the Drive Roller in order to clean it. REMOVE THE MEDIA BEFORE PERFORMING THIS OPERATION. Perform the Turn Drive Roller utility as follows: 1 In the Service Utilities submenu, scroll to "Turn Drive Roller" and press Enter. Service utilities Change ink tubes Unlock Carriage Turn Drive Roller Prime tubes EEROM Setup Menu Back Enter 2 Once the utility starts, the Drive Roller will begin to turn slowly and the following message will be displayed. Everytime the Drive Roller completes a turn, the counter will increase by one. Turning Drive Roller turns 2 Press CANCEL to stop 3 If you want to stop the Drive Roller from turning, press Cancel and the following message will appear on the front panel. Press Enter if you want to return to the Service Utility menu or press Back if you want to continue turning the Drive Roller. Turning Drive Roller Turning Drive Roller stopped. Press ENTER to finish or BACK to resume HP DesignJets 500 and 800 Series Printers Service Manual 4-21