Understand lights on the formatter ..................................................................

494

HP Jetdirect LEDs ..........................................................................

494

Heartbeat LED ................................................................................

495

Engine-test button ............................................................................................................

495

Diagnostics menu ............................................................................................................

496

Diagnostics mode ............................................................................................................

496

Diagnostics that put the engine into the special diagnostics mode .................................

497

Diagnostic tests ...............................................................................................................

497

Disable cartridge check ...................................................................................................

498

Paper-path sensors test ...................................................................................................

499

Paper-path test ................................................................................................................

501

Manual sensor test (special-mode test) ...........................................................................

501

Manual sensor test 2 (special-mode test) ........................................................................

502

Component tests ..............................................................................................................

503

Component test (special-mode test) ...............................................................

503

Print/stop test ...................................................................................................................

507

Color-band test ................................................................................................................

507

Service mode functions ....................................................................................................................

508

Service menu ...................................................................................................................

508

Product resets ..................................................................................................................

509

Restore factory-set defaults ............................................................................

509

Hard disk initialization .....................................................................................

510

NVRAM initialization ........................................................................................

510

Diagrams ..........................................................................................................................................

511

Connectors ......................................................................................................................

511

DC controller PCA ...........................................................................................

511

PCAs ...............................................................................................................

511

Product base ...................................................................................................

514

1 x 500-sheet input tray ...................................................................................

517

3 x 500-sheet input tray ...................................................................................

517

IPTU ................................................................................................................

518

Sensors ............................................................................................................................

518

Sensors ...........................................................................................................

518

Product base ...................................................................................................

520

1 x 500-sheet input tray ...................................................................................

522

3 x 500-sheet input tray ...................................................................................

523

IPTU ................................................................................................................

524

Fans .................................................................................................................................

525

Fans ................................................................................................................

525

Product base ...................................................................................................

526

Motors ..............................................................................................................................

526

Motors .............................................................................................................

526

Product base ...................................................................................................

528

1 x 500-sheet input tray ...................................................................................

529

ENWW

xiii