Network connectivity problems .......................................................................................................... 615
Troubleshooting network printing problems ...................................................................... 615
Loopback test .................................................................................................................... 616
Ping test ............................................................................................................................ 616
Functional checks .............................................................................................................................. 617
Engine test ........................................................................................................................ 617
Formatter test .................................................................................................................... 617
MFP resets ........................................................................................................................................ 619
Cold reset .......................................................................................................................... 619
NVRAM initialization ......................................................................................................... 619
Tools for troubleshooting ................................................................................................................... 621
Individual component diagnostics ..................................................................................... 622
LED diagnostics ............................................................................................... 622
Engine diagnostics ........................................................................................... 623
Diagnostics mode ............................................................................ 623
Diagnostics that put the engine into the special diagnostics
mode ................................................................................................ 623
Diagnostic tests ............................................................................... 624
Paper path sensor test ..................................................................................... 625
Manual sensor test ........................................................................................... 626
Scanner tests ................................................................................................... 628
Component tests .............................................................................................. 628
Service ID ......................................................................................................................... 631
Converting the service ID to an actual date ..................................................... 631
Troubleshooting the embedded HP Jetdirect print server ................................................ 632
Firmware-stack trace ........................................................................................................ 632
Diagrams for troubleshooting ............................................................................................................ 633
DC controller connections ................................................................................................. 633
Scanner controller PCB connections ................................................................................ 636
Locations of major components ........................................................................................ 637
Sensors and switches ...................................................................................... 639
Sensors and switches ..................................................................... 639
Motors, fans, and solenoids ............................................................................. 641
Motors and solenoids ...................................................................... 642
Fans ................................................................................................. 644
PCBs ............................................................................................... 645
Scanner and ADF components ........................................................................ 646
ADF and scanner sensors ............................................................... 646
ADF pickup assembly sensors ........................................................ 647
ADF motors, fans, and solenoids .................................................... 647
2 X 500-sheet feeder ........................................................................................ 649
IPTU ................................................................................................................. 650
General timing chart ......................................................................................................... 651
General circuit diagrams ................................................................................................... 652
Upgrade the firmware ........................................................................................................................ 659
Determine the current firmware version ........................................................................... 659
Download new firmware from the HP Web site ................................................................ 659
Transfer the new firmware to the MFP ............................................................................. 659
Use FTP to upload the firmware through a browser ........................................ 659
Use FTP to upgrade the firmware on a network connection ........................... 660
xvi ENWW
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