Accessory lights for the 3-bin mailbox and stapler/stacker.................................................................332 Accessory lights .................................................................................................................332 Formatter lights....................................................................................................................................333 Copy-board LED.................................................................................................................333 HP Jetdirect LEDs...............................................................................................................333 Heartbeat LED....................................................................................................................334 Fax LED..............................................................................................................................334 Jams....................................................................................................................................................335 Clearing jams from the top-cover and print-cartridge areas...............................................337 Clearing jams from the optional envelope-feeder area......................................................339 Clearing jams from the tray 1 area.....................................................................................341 Clearing jams from the tray 2, 3, 4, or 5 areas...................................................................343 Clearing jams from the optional duplexer...........................................................................345 Clearing jams from the output areas..................................................................................347 Clearing jams from the fuser...............................................................................................349 To clear jams from the fuser..............................................................................349 Clearing jams from the ADF...............................................................................................353 Clearing staple jams...........................................................................................................354 Solving repeated jams........................................................................................................356 Causes of persistent jams..................................................................................................357 Jams in the top-cover and print-cartridge area..................................................357 Jams in the envelope-feeder area and the tray 1 area......................................358 Jams in the tray 2 area and the optional 500-sheet feeder areas.....................358 Jams in the duplexing area................................................................................359 Jams in the output area......................................................................................359 Jams in the fuser................................................................................................361 Jams in the ADF.................................................................................................361 Using the paper-path test...................................................................................................362 Using the scanner tests......................................................................................................362 Image-formation troubleshooting.........................................................................................................363 Media-related print-quality problems..................................................................................363 Overhead transparency defects..........................................................................................364 Print-quality problems that are related to the environment................................................364 Print-quality problems that are related to jams...................................................................364 Image-defect examples......................................................................................................365 Light print (partial page) ....................................................................................367 Light print (entire page) .....................................................................................368 Specks or dots ..................................................................................................369 Dropouts ............................................................................................................370 Lines ..................................................................................................................372 Horizontal lines...................................................................................................373 Gray background ...............................................................................................374 Loose toner or toner smear ...............................................................................375 Repeating defects and repeating images .........................................................376 Misformed characters ........................................................................................377 Page skew..........................................................................................................378 Curl or wave ......................................................................................................379 Wrinkles or creases ...........................................................................................380 Vertical white lines ............................................................................................381 Horizontal white lines.........................................................................................382 xi