1-6-6 Drum section ...................................................................................................................................... 1-6-12

(1) Detaching and refitting the drum unit ............................................................................................ 1-6-12

(2) Detaching and refitting the LED print heads ................................................................................. 1-6-13

1-6-7 Primary transfer section ..................................................................................................................... 1-6-14

(1) Detaching and refitting the primary transfer unit ........................................................................... 1-6-14

(2) Detaching and refitting the primary transfer belt ........................................................................... 1-6-15

(3) Detaching and refitting the primary transfer cleaning unit ............................................................ 1-6-16

1-6-8 Fuser unit ........................................................................................................................................... 1-6-17

(1) Detaching and refitting the fuser unit ............................................................................................ 1-6-17

(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 ................................................................................... 1-6-18

1-6-9 PWBs ................................................................................................................................................. 1-6-24

(1) Detaching and refitting the main controller PWB .......................................................................... 1-6-24

(2) Detaching and refitting the engine controller PWB and power supply PWB ................................ 1-6-25

(3) Detaching and refitting the LED print heads relay PWB ............................................................... 1-6-28

(4) Detaching and refitting the main high voltage PWB ..................................................................... 1-6-29

(5) Detaching and refitting the bias high voltage PWB ...................................................................... 1-6-30

1-6-10 Others ................................................................................................................................................ 1-6-31

(1) Detaching and refitting the main drive unit ................................................................................... 1-6-31

(2) Detaching and refitting the paper feed drive unit .......................................................................... 1-6-32

(3) Detaching and refitting the fuser drive unit ................................................................................... 1-6-33

(4) Detaching and refitting the toner motor 1, 2, 3 and 4 ................................................................... 1-6-34

(5) Detaching and refitting the ozone filters ....................................................................................... 1-6-35

(6) Detaching and refitting the waste toner duct ................................................................................ 1-6-36

1-7 Firmware

1-7-1 Downloading firmware .......................................................................................................................... 1-7-1

(1) Format of the firmware files ............................................................................................................ 1-7-1

(2) Downloading firmware via the parallel interface ............................................................................. 1-7-2

(3) Downloading firmware using the memory card .............................................................................. 1-7-3

(4) Downloading the message data ..................................................................................................... 1-7-5

2-1 Mechanical construction

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

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

(2) Paper feeding from MP tray ............................................................................................................ 2-1-5

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

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

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

2-1-3 Drum section ...................................................................................................................................... 2-1-10

(1) Drum unit ...................................................................................................................................... 2-1-10

(2) Waste toner ejecting mechanism ................................................................................................. 2-1-13

(3) LED print head .............................................................................................................................. 2-1-14

(4) Main charger unit .......................................................................................................................... 2-1-16

2-1-4 Primary transfer section ..................................................................................................................... 2-1-18

(1) Primary transfer unit ..................................................................................................................... 2-1-18

(2) Primary transfer cleaning unit ....................................................................................................... 2-1-20

2-1-5 Secondary transfer and separation section ........................................................................................ 2-1-23

2-1-6 Fuser section ...................................................................................................................................... 2-1-25

(1) Fuser unit ...................................................................................................................................... 2-1-25

2-2 Electrical Parts Layout

2-2-1 Electrical parts layout ........................................................................................................................... 2-2-1

(1) Main frame and controller box ........................................................................................................ 2-2-1

(2) Drum unit, developer unit and fuser unit ......................................................................................... 2-2-3

1-1-2

Table of Contents