HP Color LaserJet 8500 Service Manual - Page 475

DIP switch settings The following table shows the position of the DIP switches to run each of the 2,000-sheet input unit diagnostic tests. Table 48. DIP switch settings for troubleshooting test procedures DIP switch Normal setting Motor test Standalone running test Sensor test 1 Off On On Off 2 Off On Off Off 3 Off Off Off On 4 Off On On On CAUTION Standalone running test This test verifies that the 2,000-sheet input unit is functioning properly. For this test, use the service LEDs. (See page 472 for an interpretation of the service LED patterns.) To prevent excessive media jams during this test, feed only six to eight pages. 1 Ensure that paper is in the tray. 2 Set the DIP switches on the 2,000-sheet input unit's controller PCA for the standalone running test. (See page 473 for an explanation of the settings.) 3 Use the switch that is located on the unit's power supply to switch to diagnostic mode. • If the unit does not work, there is no paper movement and the lower service LED flashes in a pattern that indicates the problem. (See page 472 for an interpretation of the service LED patterns.) 4 To stop the test, turn the power supply switch back to operational mode and set the DIP switches on the controller PCA to the off position. Open the VTU and remove any media from the paper path. EN 2,000-sheet input unit troubleshooting 473