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

2-1-2 Optical section ........................................................................................................................................2-1-4

(1) Original scanning...............................................................................................................................2-1-5

(2) Image printing....................................................................................................................................2-1-6

2-1-3 Drum section...........................................................................................................................................2-1-8

2-1-4 Developing section................................................................................................................................2-1-10

(1) Formation of magnetic brush...........................................................................................................2-1-11

(2) Single component developing system.............................................................................................2-1-12

2-1-5 Transfer and separation sections..........................................................................................................2-1-13

2-1-6 Fixing section ........................................................................................................................................2-1-15

(1) Fixing temperature system ..............................................................................................................2-1-16

(2) Fixing temperature control based on ambient temperature.............................................................2-1-16

2-1-7 Exit and switchback sections ................................................................................................................2-1-17

2-1-8 Duplex section ......................................................................................................................................2-1-18

(1) Paper conveying operation in duplex copying.................................................................................2-1-19

2-2 Electrical Parts Layout

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

(1) PCBs .................................................................................................................................................2-2-1

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

(3) Motors ...............................................................................................................................................2-2-4

(4) Other electrical components..............................................................................................................2-2-5

2-3 Operation of the PWBs

2-3-1 Power source PCB..................................................................................................................................2-3-1

2-3-2 Main PCB................................................................................................................................................2-3-4

2-3-3 Engine PCB ............................................................................................................................................2-3-8

2-3-4 Printer board PCB.................................................................................................................................2-3-14

2-3-5 Operation unit PCB ...............................................................................................................................2-3-18

2-3-6 CCD PCB..............................................................................................................................................2-3-21

2-4 Appendixes

Timing chart No.1....................................................................................................................................2-4-1

Timing chart No.2....................................................................................................................................2-4-2

Timing chart No.3....................................................................................................................................2-4-3

Timing chart No.4....................................................................................................................................2-4-4

Chart of image adjustment procedures...................................................................................................2-4-5

Maintenance parts list .............................................................................................................................2-4-8

Periodic maintenance procedures ..........................................................................................................2-4-9

General wiring diagram.........................................................................................................................2-4-11

Table of Contents