(1) Precautions .......................................................................................................................................1-5-1

(2) Drum..................................................................................................................................................1-5-1

(3) Toner container .................................................................................................................................1-5-1

1-5-2 Outer covers ...........................................................................................................................................1-5-2

(1) Detaching and refitting the top cover.................................................................................................1-5-2

(2) Detaching and refitting the rear cover ...............................................................................................1-5-3

(3) Detaching and refitting the right cover...............................................................................................1-5-4

(4) Detaching and refitting the left cover.................................................................................................1-5-5

1-5-3 Paper feed unit........................................................................................................................................1-5-6

(1) Detaching and refitting the paper feed unit .......................................................................................1-5-6

(2) Detaching and refitting the paper feed roller .....................................................................................1-5-7

(3) Detaching and refitting the retard roller .............................................................................................1-5-8

(4) Detaching and refitting the secondary transfer roller.........................................................................1-5-9

1-5-4 MP tray feed unit...................................................................................................................................1-5-10

(1) Detaching and refitting the MP tray feed unit ..................................................................................1-5-10

(2) Detaching and refitting the MP tray feed roller ................................................................................1-5-11

1-5-5 Developing section................................................................................................................................1-5-12

(1) Detaching and refitting the developer unit.......................................................................................1-5-12

1-5-6 Drum section.........................................................................................................................................1-5-13

(1) Detaching and refitting the drum unit ..............................................................................................1-5-13

(2) Replacing the LED print head and drum unit ..................................................................................1-5-15

1-5-7 Primary transfer section ........................................................................................................................1-5-22

(1) Detaching and refitting the primary transfer unit .............................................................................1-5-22

(2) Detaching and refitting the primary transfer unit .............................................................................1-5-22

(3) Replacing the primary transfer unit .................................................................................................1-5-23

(4) Detaching and refitting the primary transfer cleaning unit ...............................................................1-5-24

1-5-8 Fuser unit (16/17 ppm printer [EUR/USA model]).................................................................................1-5-25

(1) Detaching and refitting the fuser unit...............................................................................................1-5-25

(2) Detaching and refitting the fuser thermistor 1 and 2, fuser thermostat 1 and 2, fuser heater

lamp 1 and 2, heat roller, and press roller.......................................................................................1-5-26

1-5-9 Fuser unit (20/22 ppm printer [EUR/USA model]).................................................................................1-5-32

(1) Detaching and refitting the fuser unit...............................................................................................1-5-32

(2) Detaching and refitting the fuser thermistor 1, fuser thermostat 1, fuser heater lamp, heat

roller, and press belt........................................................................................................................1-5-33

1-5-10 PWBs ....................................................................................................................................................1-5-40

(1) Detaching and refitting the main controller PWB.............................................................................1-5-40

(2) Detaching and refitting the engine controller PWB and power supply PWB ...................................1-5-41

(3) Detaching and refitting the LED print heads relay PWB..................................................................1-5-44

(4) Detaching and refitting the main high voltage PWB ........................................................................1-5-45

(5) Detaching and refitting the bias high voltage PWB .........................................................................1-5-46

1-5-11 1 Others ................................................................................................................................................1-5-47

(1) Detaching and refitting the main drive unit ......................................................................................1-5-47

(2) Detaching and refitting the paper feed drive unit.............................................................................1-5-48

(3) Detaching and refitting the fuser drive unit......................................................................................1-5-49

(4) Detaching and refitting the toner motor 1, 2, 3 and 4 ......................................................................1-5-50

(5) Detaching and refitting the ozone filters ..........................................................................................1-5-51

(6) Detaching and refitting the waste toner duct ...................................................................................1-5-52

1-6 Firmware

1-6-1 Downloading firmware ............................................................................................................................1-6-1

(1) Downloading the firmware from the memory card.............................................................................1-6-2

2-1 Mechanical construction

2-1-1 Paper feed section ..................................................................................................................................2-1-1

(1) Paper feeding from paper cassette ...................................................................................................2-1-1

2-1-2 Developing section..................................................................................................................................2-1-7

(1) Developer unit ...................................................................................................................................2-1-7

(2) Touch down developing method .......................................................................................................2-1-9

(3) Developer drive stop mechanism ....................................................................................................2-1-10

2-1-3 Drum section.........................................................................................................................................2-1-11