Jam recovery ................................................................................................... 558 Product feeds multiple sheets .......................................................................................... 559 Product pulls from incorrect tray ...................................................................................... 559 Product feeds incorrect page size ................................................................................... 559 Paper does not feed automatically ..................................................................................
560 Paper does not feed from Tray 2, 3, 4, or 5 ..................................................................... 560 Transparencies or glossy paper will not feed .................................................................. 561 Envelopes jam or will not feed in the product .................................................................. 562 Output is curled or wrinkled ............................................................................................. 562 Product will not duplex or duplexes incorrectly ................................................................
563 Solve image quality problems .......................................................................................................... 564 Example print quality problems ........................................................................................ 564 Repetitive defects ruler .................................................................................................... 564 Overhead transparency defects ....................................................................................... 566 Print quality problems associated with the environment ..................................................
566 Print quality problems associated with jams .................................................................... 566 Optimize and improve image quality ................................................................................ 566 Use supported paper ....................................................................................... 566 Calibrate the product ....................................................................................... 567 Specify the correct paper type ........................................................................ 567 Clean the fuser ................................................................................................
568 Respond to control-panel error messages ...................................................... 569 Clean the registration second transfer assembly ........................... 569 Use manual print modes ................................................................................. 571 Print-quality-troubleshooting pages ................................................................. 572 Image-quality issues ........................................................................................................ 575 Interface troubleshooting ..................................................................................................................
580 Communication checks .................................................................................................... 580 EIO troubleshooting ......................................................................................................... 580 Engine diagnostics ........................................................................................................................... 581 LED diagnostics ............................................................................................................... 581 Understand lights on the formatter ..................................................................
581 HP Jetdirect LEDs .......................................................................... 581 Heartbeat LED ................................................................................ 582 Understand lights on the SCB ......................................................................... 582 Understand lights on the copy-process board (CPB) ...................................... 584 Engine-test button ............................................................................................................ 584 Troubleshooting menu .....................................................................................................
585 Diagnostics mode ............................................................................................................ 586 Diagnostics that put the engine into the special diagnostics mode ................................. 586 Diagnostic tests ............................................................................................................... 587 Disable cartridge check ................................................................................................... 588 Paper-path sensors test ...................................................................................................
588 Paper-path test ................................................................................................................ 590 ENWW xiii