Service test The service test helps to determine whether the print engine is functioning correctly. This test is very useful for isolating MFP problems. The test can be performed with a finishing device attached, but it will not activate any of the finishing device motors, switches, or sensors. To perform a service test 1 Turn the power off. 2 Make sure that the MFP paper path is clear of all media, and that the left, front, and right doors are closed. 3 Open tray 2 and tray 3. 4 Turn the power on, and when the MFP is ready, touch MENU to open the menus. 5 Scroll to DIAGNOSTICS . 6 Touch DIAGNOSTICS to open that menu. 7 Touch SERVICE TEST .
The service test can take up to two minutes to complete. The control panel shows PERFORMING SERVICE TEST . 8 When the test is complete, SERVICE TEST PASSED should appear on the control panel display or up to five sets of four-digit numbers. If no abnormalities were noted, (0000 0000 0000 0000 0000) should appear. If abnormalities were noted, up to five four-digit codes show up in parentheses (0101 0111 0132 0000 0000). Write down these codes and see table 31 in the HP LaserJet 9000 service manual for an explanation of the codes. 9 Close tray 2 and tray 3. 206 Chapter 7 Troubleshooting C8523-90921