HP C7769B Service Manual - Page 78

Service Tests and Utilities PHONE SUPPORT Carriage Movement The purpose of this test is to verify the movement of the scan-axis components at several speeds. This test checks for the following problems: n Friction problems with worn out slider rod or Carriage Bushings. n Blockage due to problems with the Service Station. n Problems with encoder sensing. NOTE This Service Test can be performed by the End User with the guidance of a HP Support person via the phone. WARNING IF POSSIBLE ALWAYS PERFORM THIS TEST BEFORE REPLACING THE CARRIAGE ASSEMBLY. IF THIS TEST PASSES, DO NOT REPLACE THE CARRIAGE ASSEMBLY. Perform the Carriage Movement test as follows: 1 In the Service Tests submenu, scroll to "Carriage movement" and press Enter. Service tests Troubleshooting Aerosol Fan test Ink Supply Station Paper advance test Carriage movement test Menu Back Enter 2 The test will start and the following message will appear on the Front Panel: Carriage movement Carriage movement test Moving Carriage. Please wait 3 Once the Printer has completed the test it will analyze the data received while performing the test. Once the data has been analyzed, the following message will appear on the Front Panel: Carriage movement Carriage movement test Ready to display results. Press ENTER Menu Back Enter 4-8 HP DesignJets 500 and 800 Series Printers Service Manual