HP Color LaserJet Enterprise CP4020 Service Manual - Page 277

horizontal lines. The test page can use only Tray 2 as the paper source, so make sure that paper is loaded in Tray 2. Figure 3-3 Engine-test button Paper-path test This diagnostic test generates one or more test pages that you can use to isolate the cause of jams. To isolate a problem, specify which input tray to use, specify whether to use the duplex path, and specify the number of copies to print. Multiple copies can be printed to help isolate intermittent problems. The following options become available after you start the diagnostic feature: ● PRINT TEST PAGE. Run the paper-path test from the default settings: Tray 2, no duplex, and one copy. To specify other settings, scroll down the menu and select the setting, and then scroll back up and select PRINT TEST PAGE to start the test. ● SOURCE. Select Tray 1, Tray 2, or the optional tray. ● DUPLEX. Enable or disable two-sided printing. ● COPIES. Set the numbers of copies to be printed; the choices are 1,10, 50, 100, or 500. 1. Press the Home button. 2. Press the down arrow to highlight DIAGNOSTICS, and then press the OK button. 3. Press the down arrow to highlight PAPER PATH TEST, and then press the OK button. 4. Select the paper-path test options for the test you want to run. ENWW Tools for troubleshooting 245