Requirements On Pwb Replacement; Mechanical Construction; Electrical Parts Layout; Operation Of The Pwbs - Kyocera FS-1028MFP Service Manual

1-5-2 Outer covers ...........................................................................................................................................1-5-3
(1) Detaching and refitting the left cover and right cover ........................................................................1-5-3
1-5-3 Paper feed section ..................................................................................................................................1-5-6
(1) Detaching and refitting the paper feed assembly (paper feed roller and pickup roller) .....................1-5-6
(2) Detaching and refitting the retard roller assembly.............................................................................1-5-8
(3) Detaching and refitting the MP paper feed roller.............................................................................1-5-10
(4) Note on removing and Installing the upper registration roller and lower registration roller .............1-5-12
1-5-4 Optical section ......................................................................................................................................1-5-13
(1) Detaching and refitting the original cover ........................................................................................1-5-13
(2) Detaching and refitting the scanner unit (LSU) ...............................................................................1-5-14
(3) Detaching and refitting the laser scanner unit (LSU).......................................................................1-5-17
(4) Replacing the image scanner unit (ISU)..........................................................................................1-5-21
(5) Detaching and refitting the exposure lamp and inverter PWB.........................................................1-5-27
1-5-5 Developing section................................................................................................................................1-5-29
(1) Detaching and refitting the developing unit .....................................................................................1-5-29
1-5-6 Drum section.........................................................................................................................................1-5-30
(1) Detaching and refitting the drum unit ..............................................................................................1-5-30
(2) Detaching and refitting the main charger unit..................................................................................1-5-31
1-5-7 Transfer/separation section ..................................................................................................................1-5-32
(1) Detaching and refitting the transfer roller ........................................................................................1-5-32
1-5-8 Fuser section ........................................................................................................................................1-5-34
(1) Detaching and refitting the fuser unit...............................................................................................1-5-34
(2) Switching the fuser pressure ...........................................................................................................1-5-38
1-5-9 PWBs ....................................................................................................................................................1-5-39
(1) Detaching and refitting the control PWB .........................................................................................1-5-39
(2) Detaching and refitting the power source PWB...............................................................................1-5-42
(3) Detaching and refitting the high voltage PWB.................................................................................1-5-45
(4) Detaching and refitting the scanner PWB .......................................................................................1-5-49
1-5-10 Others ...................................................................................................................................................1-5-50
(1) Detaching and refitting the main motor ...........................................................................................1-5-50
(2) Direction of installing the left cooling fan motor, right cooling fan motor and power
source fan motor .............................................................................................................................1-5-51

1-6 Requirements on PWB Replacement

1-6-1 Firmware .................................................................................................................................................1-6-1
(1) Upgrading the firmware .....................................................................................................................1-6-1
1-6-2 Remarks on control PWB replacement...................................................................................................1-6-2

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 Optical section ........................................................................................................................................2-1-6
(1) Scanner unit ......................................................................................................................................2-1-6
(2) Image scanner unit (ISU) ..................................................................................................................2-1-7
(3) Laser scanner unit (LSU) ..................................................................................................................2-1-9
2-1-4 Developing section................................................................................................................................2-1-11
2-1-5 Transfer/separation section ..................................................................................................................2-1-12
2-1-6 Cleaning section ...................................................................................................................................2-1-13
2-1-7 Fuser section ........................................................................................................................................2-1-14
2-1-8 Paper exit section .................................................................................................................................2-1-16
2-1-9 Duplex/conveying section .....................................................................................................................2-1-18

2-2 Electrical Parts Layout

2-2-1 Electrical parts layout..............................................................................................................................2-2-1
(1) PWBs ................................................................................................................................................2-2-1
(2) Switches and sensors .......................................................................................................................2-2-3
(3) Other electrical components..............................................................................................................2-2-4

2-3 Operation of the PWBs

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