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Firewall ............................................................................................................................ 113
Scan-to and Fax-to Folder Authentication ....................................................................... 113
Syslog .............................................................................................................................. 114
Certificates ....................................................................................................................... 114
Signed Firmware .............................................................................................................. 114
Wireless Authentication ................................................................................................... 114
Economy settings ............................................................................................................................. 114
Print with General Office mode ........................................................................................ 114
Power handling ................................................................................................................ 114
Clean the product ............................................................................................................................. 116
Clean the control panel .................................................................................................... 116
Product updates ............................................................................................................................... 116
11 Solve problems ......................................................................................................................................... 117
Customer support ............................................................................................................................. 117
Problem-solving checklist ................................................................................................................. 117
Step 1: Check that the product power is on ..................................................................... 118
Step 2: Check the control panel for error messages ....................................................... 118
Step 3: Test print functionality ......................................................................................... 118
Step 4: Try sending a print job from a computer .............................................................. 118
Step 5: Test the Plug and Print USB Drive printing functionality (X551 Series) .............. 118
Factors that affect product performance .......................................................................... 119
Restore the factory-set defaults ....................................................................................................... 119
Paper feeds incorrectly or becomes jammed ................................................................................... 120
The product does not pick up paper ................................................................................ 120
The product picks up multiple sheets of paper ................................................................ 120
Prevent paper jams .......................................................................................................... 120
Clear jams ........................................................................................................................................ 121
Jam locations ................................................................................................................... 121
Clear jams in Tray 1(Multi-purpose tray) ......................................................................... 122
Clear jams in Tray 2 ......................................................................................................... 125
Clear jams in optional Tray 3 ........................................................................................... 126
Clear jams in the left door ................................................................................................ 127
Clear jams in the output bin ............................................................................................. 129
Clear jams in the duplexer ............................................................................................... 130
Improve print quality ......................................................................................................................... 132
Use the correct paper type setting in the printer driver .................................................... 133
Adjust color ...................................................................................................................... 133
Use paper that meets HP specifications .......................................................................... 137
Check the ink cartridges .................................................................................................. 137
Clean ink smears ............................................................................................................. 140
ENWW ix