HP M4345 MFP

11 Problem solving
Problem-solving checklist .................................................................................................................. 168
Factors that affect performance ........................................................................................ 168
Problem-solving flowchart ................................................................................................................. 169
Solve general device problems ......................................................................................................... 174
Control-panel message types ............................................................................................................ 177
Control-panel messages .................................................................................................................... 178
Common causes of jams ................................................................................................................... 188
Clear jams .......................................................................................................................................... 189
Clear jams from the top-cover and print-cartridge areas .................................................. 190
Clear jams from the optional envelope-feeder area ......................................................... 192
Clear jams from the tray1 area ......................................................................................... 194
Clear jams from the tray2, 3, 4, or 5 areas ....................................................................... 195
Clear jams from the optional duplexer .............................................................................. 197
Clear jams from the output areas ..................................................................................... 198
Clear jams from the fuser ................................................................................................. 199
Clear jams from the document feeder .............................................................................. 202
Solve repeated jams ......................................................................................................... 203
Paper-path test ................................................................................................................. 204
Clear staple jams ............................................................................................................................... 205
Solve print-quality problems .............................................................................................................. 207
Print-quality problems associated with media .................................................................. 207
Print-quality problems associated with the environment .................................................. 207
Print-quality problems associated with jams ..................................................................... 207
Image defect examples ..................................................................................................... 207
Light print (partial page) .................................................................................................... 209
Light print (entire page) ..................................................................................................... 209
Specks .............................................................................................................................. 209
Dropouts ......................................................................................................................
..... 210
Lines .................................................................................................................................. 210
Gray background .............................................................................................................. 211
Toner smear ...................................................................................................................... 211
Loose toner ....................................................................................................................... 212
Repeating defects ............................................................................................................. 212
Repeating image ............................................................................................................... 212
Misformed characters ....................................................................................................... 213
Page skew ........................................................................................................................ 213
Curl or wave ...................................................................................................................... 214
Wrinkles or creases .......................................................................................................... 214
Vertical white lines ............................................................................................................ 215
Tire tracks ......................................................................................................................... 215
White spots on black ......................................................................................................... 215
Scattered lines .................................................................................................................. 216
Blurred print ...................................................................................................................... 216
Random image repetition .................................................................................................. 217
Solve network printing problems ....................................................................................................... 218
Solve copy problems ......................................................................................................................... 219
Prevent copy problems ..................................................................................................... 219
Image problems ................................................................................................................ 219
Media-handling problems ................................................................................................. 220
viii ENWW