1-5-8 PWBs ....................................................................................................................................................1-5-19

(1) Detaching and refitting the control PWB .........................................................................................1-5-19

(2) Detaching and refitting the power source PWB...............................................................................1-5-22

(3) Detaching and refitting the high voltage PWB.................................................................................1-5-24

1-5-9 Others ...................................................................................................................................................1-5-28

(1) Detaching and refitting the main motor ...........................................................................................1-5-28

(2) Detaching and refitting the laser scanner unit .................................................................................1-5-29

(3) Detaching and refitting the eraser lamp (PWB)...............................................................................1-5-31

(4) Direction of installing the left cooling fan motor and right cooling fan motor ...................................1-5-32

1-6 Firmware

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

(1) Firmware files ....................................................................................................................................1-6-1

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

(3) Downloading the firmware from the memory card.............................................................................1-6-4

2-1 Mechanical Construction

2-1-1 Paper feed/conveying section.................................................................................................................2-1-1

(1) Cassette paper feed section..............................................................................................................2-1-1

(2) MP tray paper feed section ...............................................................................................................2-1-2

(3) Paper conveying section ...................................................................................................................2-1-3

2-1-2 Drum section...........................................................................................................................................2-1-4

(1) Drum section .....................................................................................................................................2-1-4

(2) Main charger unit...............................................................................................................................2-1-5

2-1-3 Expose section........................................................................................................................................2-1-6

(1) Laser scanner unit.............................................................................................................................2-1-6

2-1-4 Developing section..................................................................................................................................2-1-8

2-1-5 Transfer/separation section ....................................................................................................................2-1-9

2-1-6 Cleaning section ...................................................................................................................................2-1-10

2-1-7 Fuser section ........................................................................................................................................2-1-11

2-1-8 Paper exit section .................................................................................................................................2-1-13

2-1-9 Duplex/conveying section .....................................................................................................................2-1-15

2-2 Electrical Parts Layout

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

(1) PWBs ................................................................................................................................................2-2-1

(2) Switches and sensors .......................................................................................................................2-2-2

(3) Other electrical components..............................................................................................................2-2-3

2-3 Operation of the PWBs

2-3-1 Power source PWB.................................................................................................................................2-3-1

2-3-2 Control PWB ...........................................................................................................................................2-3-3

2-4 Appendixes

2-4-1 Appendixes .............................................................................................................................................2-4-1

(1) Wiring diagram ..................................................................................................................................2-4-1

(2) Repetitive defects gauge...................................................................................................................2-4-2

Table of Contents