HP LaserJet 9000 Service Manual - Page 239

Note Note Table 24. DIP switch settings DIP switch Normal 1 Off 2 Off 3 Off 4 Off Motor test On On Off On Stand-alone running test On Off Off On Sensor test Off Off On On Make sure that you turn the power supply off and set all the DIP switches to the off position (normal settings) when you finish the diagnostics, or the unit will not work correctly. Then, replace the back cover. Light-pattern interpretation If tray 4 is working correctly, it picks up media from the tray and feeds it to the printer, and the bottom service light flashes regularly every 0.5 seconds. Table 25. Tray 4 light-pattern interpretation Long (1 sec.) Short (0.03 Error number and Recommended action sec.) meaning 3 1 66.11.01 Lift the tray by hand to make sure that it lifts smoothly. lifter malfunction Make sure that the paper-size plates are correctly installed (in the same corresponding slots) and are not bent. If neither if these is the problem, replace tray 4. 2 1 13.11.11 If the media does not reach the sensor, open the door registration-sensor and remove the media. Replace the paper pickup delay jam assembly. 2 2 13.11.3B Open the door, and remove the media. Check the registration-sensor sensors, and replace the corresponding FRU. station jam/initial jam 2 3 13.11.31 If the media did not reach the sensor, open the door jam-sensor delay jam and remove the media. Replace the paper pickup assembly. 2 4 13.11.21 Open the door and remove the media. 13.11.2B jam-sensor stationary jam/initial jam 1 1 paper-path door open Close the door. 1 2 tray open Close the tray. wrong size of media Load the correct size of media, or check the sensors. loaded 1 3 no media in tray Load the media, or check the sensors. If the LED does not illuminate, replace the paper-deck PCA or the universal-power-supply assembly. Tray 4 diagnostics 223