press roller.......................................................................................................................................1-5-10

(3) Detaching and refitting the engine/high voltage PWB and power source PWB ..............................1-5-14

(4) Detaching and refitting the laser scanner unit .................................................................................1-5-17

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

(6) Detaching and refitting the drive unit...............................................................................................1-5-20

(7) Detaching and refitting the main motor ...........................................................................................1-5-21

1-5-6 Scanner unit..........................................................................................................................................1-5-22

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

(2) Detaching and refitting the optical module unit ...............................................................................1-5-24

(3) Detaching and refitting the main PWB ............................................................................................1-5-29

(4) Detaching and refitting the fax control PWB (d-Copia164MF only).................................................1-5-31

(5) Detaching and refitting the exposure lamp......................................................................................1-5-33

(6) Detaching and refitting the inverter PWB ........................................................................................1-5-35

(7) Detaching and refitting the scanner home position sensor .............................................................1-5-37

(8) Detaching and refitting the scanner motor ......................................................................................1-5-38

1-5-7 Document processor (DP) ....................................................................................................................1-5-39

(1) Detaching and refitting the document processor (DP) ....................................................................1-5-39

(2) Detaching and refitting the pad assembly .......................................................................................1-5-41

(3) Detaching and refitting the original feed roller.................................................................................1-5-42

1-6 Firmware

1-6-1 Updating the firmware.............................................................................................................................1-6-1

2-1 Mechanical construction

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

(1) Paper feed section ............................................................................................................................2-1-1

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

(1) Drum unit...........................................................................................................................................2-1-3

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

2-1-3 Expose section........................................................................................................................................2-1-5

(1) Laser scanner unit.............................................................................................................................2-1-5

2-1-4 Developing section..................................................................................................................................2-1-7

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

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

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

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

(1) Fuser unit ........................................................................................................................................2-1-11

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

(1) Paper exit section............................................................................................................................2-1-13

2-1-9 Scanner section ....................................................................................................................................2-1-15

(1) Scanner unit ....................................................................................................................................2-1-15

(2) Optical module unit..........................................................................................................................2-1-16

2-1-10 Document processor (DP) section ........................................................................................................2-1-17

(1) Document processor (DP)...............................................................................................................2-1-17

2-2 Electrical Parts Layout

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

(1) Electrical parts layout ........................................................................................................................2-2-1

2-3 Operation of the PWBs

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

2-3-2 Engine/high voltage PWB .......................................................................................................................2-3-3

2-3-3 Main PWB s .............................................................................................................................................2-3-7

2-3-4 Fax control PWB (d-Copia164MF only)................................................................................................2-3-10

2-4 Appendixes

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

(2) Repetitive defects gauge...................................................................................................................2-4-3

Table of Contents