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