[CONFIDENTIAL]
(2-1)Remove the bulk feeder ................................................................................................................. 4-47
(2-2)Detach the tray cover. .................................................................................................................... 4-47
(2-3)Detach the side cover. ................................................................................................................... 4-49
(2-4)Remove paper feed section and top cover .................................................................................... 4-49
(2-5)Remove printer base mount ........................................................................................................... 4-49
5 Firmware ........................................................................................................ 5-1
5 - 1 Firmware update....................................................................................................................................... 5-1
6 Service mode ................................................................................................. 6-1
6 - 1 Executing a service mode......................................................................................................................... 6-1
6 - 2 Service settings ........................................................................................................................................ 6-2
7 Troubleshooting ............................................................................................ 7-1
7 - 1 Image formation problems ........................................................................................................................ 7-1
(1) Poor image (Image rendering problems: printer engine) .......................................................................... 7-1
(1-1)No image appears (entirely white) ................................................................................................... 7-4
(1-2)No image appears (entirely black) ................................................................................................... 7-5
(1-3)Image is too light .............................................................................................................................. 7-6
(1-4)The background is colored ............................................................................................................... 7-7
(1-5)White streaks are printed vertically .................................................................................................. 7-8
(1-6)Black streaks appear longitudinally .................................................................................................. 7-9
(1-7)Black or white streaks appear horizontally ..................................................................................... 7-10
(1-8)Uneven density longitudinally ......................................................................................................... 7-11
(1-9)Uneven density horizontally ........................................................................................................... 7-12
(1-10)Black dots appear on the image ................................................................................................... 7-13
(1-11)Offset occurs ................................................................................................................................ 7-14
(1-12)Image is partly missing. ................................................................................................................ 7-15
(1-13)Image is out of focus .................................................................................................................... 7-16
(1-14)Poor grayscale reproducibility ...................................................................................................... 7-16
(1-15)Unevenly repeating horizontal streaks in the printed objects. Spots in the printed objects .......... 7-17
(1-16)mage is blurred (Shifted transferring) ........................................................................................... 7-17
(1-17)Paper is wrinkled .......................................................................................................................... 7-18
(1-18)Fusing is loose ............................................................................................................................. 7-18
(1-19)paper edges with toner ................................................................................................................. 7-19
(1-20)reverse side of paper ................................................................................................................... 7-19
(1-21)Carrier leaking occurs .................................................................................................................. 7-20
7 - 2 Feeding/Conveying Failures ................................................................................................................... 7-21
(1) First check items..................................................................................................................................... 7-21
7 - 3 Paper misfeed detection ......................................................................................................................... 7-23
(1) Paper misfeed indication ........................................................................................................................ 7-23
(2) Paper misfeed detection condition.......................................................................................................... 7-24
(3) Jam Codes.............................................................................................................................................. 7-25
(4) Items and corrective actions relating to the device that will cause paper jam ........................................ 7-29
7 - 4 Self-diagnostic function........................................................................................................................... 7-32
(1) Self-diagnostic function........................................................................................................................... 7-32
(2) Self diagnostic codes .............................................................................................................................. 7-32
(2-1)System Error (Fxxxx) Outline ......................................................................................................... 7-42
7 - 5 Electric problems .................................................................................................................................... 7-46
7 - 6 Mechanical problems.............................................................................................................................. 7-49
8 PWBs .............................................................................................................. 8-1
8 - 1 Description for PWB ................................................................................................................................. 8-1
(1) Main PWB................................................................................................................................................. 8-1
(1-1)PWB photograph .............................................................................................................................. 8-1
(1-2)Connector position ........................................................................................................................... 8-1
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