(1) Engine board ........................................................................................................................... 6-30
6-1-6 Print quality problems .............................................................................................................. 6-37
(2) All-black printout ...................................................................................................................... 6-39
(3) Dropouts .................................................................................................................................. 6-40
(4) Black dots ................................................................................................................................ 6-41
(5) Black horizontal streaks ........................................................................................................... 6-41
(6) Black vertical streaks ............................................................................................................... 6-42
(7) Unsharpness ........................................................................................................................... 6-43
(8) Gray background ..................................................................................................................... 6-44
Repetitive defects gauge .............................................................................................................. 6-47
6-1-7 Correcting a paper jam ............................................................................................................ 6-48
(1) Jam in the rear cover ............................................................................................................... 6-48
(2) Jam inside the printer .............................................................................................................. 6-49