Kyocera FS C5020N - Color LED Printer Service Manual page 4

2F3/2F4-5
(1) Detaching and refitting the primary transfer unit .............................................................................1-6-22
(2) Detaching and refitting the primary transfer belt .............................................................................1-6-22
(3) Replacing the primary transfer unit
(4) Detaching and refitting the primary transfer cleaning unit ...............................................................1-6-24
1-6-8 Fuser unit (16 ppm printer) ...................................................................................................................1-6-25
(1) Detaching and refitting the fuser unit...............................................................................................1-6-25
(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.......................................................................................1-6-26
1-6-9 Fuser unit (24 ppm printer) ...................................................................................................................1-6-32
(1) Detaching and refitting the fuser unit...............................................................................................1-6-32
(2) Detaching and refitting the fuser thermistor 1, fuser thermostat 1, fuser heater lamp, heat
roller, and press belt........................................................................................................................1-6-33
1-6-10 PWBs ....................................................................................................................................................1-6-40
(1) Detaching and refitting the main controller PWB.............................................................................1-6-40
(2) Detaching and refitting the engine controller PWB and power supply PWB ...................................1-6-41
(3) Detaching and refitting the LED print heads relay PWB..................................................................1-6-44
(4) Detaching and refitting the main high voltage PWB ........................................................................1-6-45
(5) Detaching and refitting the bias high voltage PWB .........................................................................1-6-46
1-6-11 Others ...................................................................................................................................................1-6-47
(1) Detaching and refitting the main drive unit ......................................................................................1-6-47
(2) Detaching and refitting the paper feed drive unit.............................................................................1-6-48
(3) Detaching and refitting the fuser drive unit......................................................................................1-6-49
(4) Detaching and refitting the toner motor 1, 2, 3 and 4 ......................................................................1-6-50
(5) Detaching and refitting the ozone filters ..........................................................................................1-6-51
(6) Detaching and refitting the waste toner duct ...................................................................................1-6-52
1-7 Firmware
1-7-1 Downloading firmware ............................................................................................................................1-7-1
(1) Downloading the firmware from the parallel interface ......................................................................1-7-2
(2) Downloading the firmware from the memory card.............................................................................1-7-3
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
(3) \Developer drive stop mechanism ...................................................................................................2-1-10
2-1-3 Drum section.........................................................................................................................................2-1-11
(1) Drum unit.........................................................................................................................................2-1-11
(2) Waste toner ejecting mechanism ....................................................................................................2-1-14
(3) LED print head ................................................................................................................................2-1-15
(4) Main charger unit.............................................................................................................................2-1-17
2-1-4 Primary transfer section ........................................................................................................................2-1-19
(1) Primary transfer unit ........................................................................................................................2-1-19
(2) Primary transfer cleaning unit..........................................................................................................2-1-21
2-1-5 Secondary transfer and separation section ..........................................................................................2-1-24
2-1-6 Fuser section ........................................................................................................................................2-1-26
(1) Fuser unit (16 ppm printer)..............................................................................................................2-1-26
(2) Fuser unit (24 ppm printer)..............................................................................................................2-1-28
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
2-3 Operation of the PWBs
2-3-1 Power supply PWB .................................................................................................................................2-3-1
2-3-2 Engine controller PWB............................................................................................................................2-3-3
(1) Fuser heater lamps control circuit .....................................................................................................2-3-4
(2) Interlock and 24 V DC power supply circuit.......................................................................................2-3-5
2-3-3 Main controller circuit ............................................................................................................................2-3-12
.................... ...................... .......................................................1-6-23