Kyocera FS 2000D User Manual

							2F8/2F9/2GA-1
2-1-1
2-1 Mechanical Construction2-1-1  Paper feed section
Paper feed section consists of the paper feed unit that feeds paper from the paper cassette and the MP tray paper feed 
unit that feeds paper from the MP tray, and the paper feed conveying section that conveys the fed paper to the transfer/ 
separation section.
(1) Paper cassette paper feed section
Paper cassette is the universal type that is applicable to various paper sizes by adjusting the side guides and paper stop-
per and approximate 500 pages can be put in. Mechanism in the paper cassette consists of the bottom plate that lifts the 
paper in order to let it touch the pickup roller and the retard roller that prevents papers from multiple feeding. Paper that is 
drawn out by the rotation of pickup roller of the paper cassette paper feed section is then sent in between the feed roller 
and the retard roller. Function of the built-in torque limiter in the retard roller gives weak resistance force against the rota-
tion. Normally, when only a page is drawn out by the rotation of pickup roller, the paper is conveyed to the printer by the 
rotation of feed roller on its own. If the pickup roller drew out two lapped pages someway, the upper paper is conveyed by 
the feed roller and the lower paper stays due to the rotation resistant force of the retard roller because the friction force 
between papers is smaller than the rotation resistance force of the retard roller and then the multiple paper feed can be 
prevented.
Figure 2-1-1 Paper cassette paper feed section
Figure 2-1-2 Paper cassette paper feed section block diagram

 

 


(1) Pickup roller
(2) Paper feed roller
(3) Feed holder
(4) Retard roller(5) Retard holder
(6) Bottom plate
(7) Retard guide
(8) Cassette base
3
4
5 YC10-3
YC10-4
YC10-5
YC8-8
YC8-1 YC7-2 Engine PWBConnect-R
 PWBMain
motor
Feed
clutch
Lift motor*
*: 35/37 and 45/47 ppm printer (EUR/USA model) only Lift
sensor*MMOTONN
MMOTRDYN
MMOTCLK
FEEDDRN
LIFTSEN
LMOTON
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							2F8/2F9/2GA
2-1-2 (2) MP tray paper feed section
The MP tray can contain about 100 pages. Feeding is performed by the rotation of the MP tray feed roller from the MP tray. 
Function of the MP tray friction pad prevents papers from multiple feeding.
Figure 2-1-3 MP tray paper feed section
Figure 2-1-4MP tray paper feed section block diagram

 



(1) MP tray paper feed roller
(2) Bottom plate
(3) MP tray frame
(4) MPF base
(5) MP tray cover
3
4
5 YC10-3
YC10-4
YC10-5YC8-8 YC9-6 Engine PWBConnect-R
 PWB
Main
motorFeed
clutch MP feed
solenoidMMOTONN
MMOTRDYN
MMOTCLK FEEDDRNMPFDRN
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							2F8/2F9/2GA
2-1-3 (3) Paper feed conveying section
The conveying section consists of the parts shown in the following illustration and conveys papers from the paper cassette 
or the MP tray to the transfer/separation section when papers are fed. Paper by feeding or refeeding is conveyed by the 
middle feed roller to the position where the registration sensor is turned on, and then sent to the transfer/separation sec-
tion by the upper registration roller and lower registration roller.
Figure 2-1-5Paper feed conveying section
Figure 2-1-6Paper feed conveying section block diagram







(1) Middle feed roller
(2) Feed DU pulley
(3) Feed frame
(4) Registration upper guide
(5) Registration sensor (actuator)
(6) Registration lower roller
(7) Registration upper roller
3
4
5 YC10-3
YC10-4
YC10-5
YC8-7
Engine PWBConnect-R
 PWBMain
motor
Regist-
ration
clutchMMOTONN
MMOTRDYN
MMOTCLK
FREGDRN
Regist-
ration
sensor
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							2F8/2F9/2GA
2-1-4
2-1-2  Drum section
(1) Drum section
The drum unit includes a photoconductive drum, eraser lamp, cleaning blade and, a main charger unit. The drum unit is 
removable with the main charger unit.
.
Figure 2-1-7 Drum section
Figure 2-1-8Drum section block diagram




(1) Drum
(2) Main charger case
(3) Charger roller cleaning roller
(4) Main charger roller
TB2Main high voltage output (DC + AC)
Engine PWB
Connect-L
 PWB
3
4
5 YC11-3
YC11-4
YC11-5
YC4-4
YC4-5Drum
motorDMOTONN
DMOTRDYN
DMOTCLK
EECLK
EEDIODrum
PWB
Drum
Ground Main
charger
roller
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							2F8/2F9/2GA-1
2-1-5
2-1-3  Expose section
(1) Laser scanner unit
The charged surface of the drum is then scanned by the laser beam from the laser scanner unit. The laser beam is dis-
persed as the polygon motor revolves to reflect the laser beam over the drum. Various lenses and mirror are housed in the 
laser scanner unit, adjust the diameter of the laser beam, and focalize it at the drum surface.
Figure 2-1-9Laser scanner unit
30/31 ppm printer
(EUR/USA model)
35/37 and 45/47 ppm printer
(EUR/USA model)









(1) Polygon motor (polygon mirror)
(2)  f-θ sub lens
(3)  f-θ main lens
(4) Direction change mirror
(5) Protective glass
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							2F8/2F9/2GA-1
2-1-6Figure 2-1-10Laser scanner unit block diagram
Engine PWB
Main PWB
APC
PWB 1
Polygon
motor
PD PWB Pin-photo
sensor
YC12-1YC10-1
YC12-2
YC14-2
YC14-4
YC14-5
YC14-7
YC14-8 YC12-2
YC12-3POLRDYN
POLONN
OUTPEN YC12-4
PDMASKN
POLCLK
SAMPLEN1
VDATAP1
VDATAN1
BEAMSEN1A
BEAMSEN1B
YC16-2
YC16-4
YC16-5
YC16-7
YC16-8
SAMPLEN2
VDATAP2
VDATAN2
BEAMSEN2A
BEAMSEN2B PDN
*: 45/47 ppm printer (EUR/USA model) only.
APC
PWB 2* Laser
diode Laser
diodeLaser
beam
Laser scanner unit
Drum
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							2F8/2F9/2GA
2-1-7
2-1-4  Developing section
(1) Developing section
The developing section consists of the developer unit and the toner container. The developer unit consists of the develop-
ing roller where a magnetic brush is formed, the doctor blade and the agitator A and B that agitate the toner. Also, the 
toner sensor checks whether or not toner remains in the developer unit.
Figure 2-1-11Developing section
Figure 2-1-12Developing section block diagram
	





(1) Developing blade
(2) Blade magnet
(3) Developing roller
(4) Developer case
(5) Agitator A(6) Agitator B
(7) Toner container
(8) Sleeve cover
(9) Developer lid
TB1 Engine PWB
Connect-R
 PWB
3
4
5 YC11-3
YC11-4
YC11-5
YC3-12 YC3-13YC8-3Drum
motor
Toner
sensorToner
motor
Developing
rollerDMOTONN
DMOTRDYN
DMOTCLK
TNMOT TNLEVEL DLPDRN
Developing bias
Developer
solenoid
Connect-L
 PWB
Developer
PWBDeveloper unit
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							2F8/2F9/2GA
2-1-8
2-1-5  Transfer/separation section
(1) Transfer/separation section
The image developed by toner on the drum is transferred onto the paper because of the electrical attraction between the 
toner itself and the transfer roller. The transfer roller is negatively biased so that the positively charged toner is attracted 
onto the paper while it is pinched by the drum and the transfer roller.
Figure 2-1-13Transfer/separation section
Figure 2-1-14Transfer /separation section block diagram

 
(1) Transfer roller
(2) Paper chute guide
(3) Separation brush
Engine PWB
Transfer
roller Separation
brush
Transfer bias Separation bias
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							2F8/2F9/2GA
2-1-9
2-1-6  Cleaning section
After the transferring process, the drum needs to be physically cleaned of toner which is residual after the development 
process. The cleaning blade is constantly pressed against the drum and scrapes the residual toner off to the cleaning 
roller. The waste toner is collected at the output end of the drum screw and sent to the waste toner box.
After the drum is physically cleaned, it then must be cleaned to the electrically neutral state. This is necessary to erase any
residual positive charge, ready to accept the uniform charge for the next print process. The residual charge is canceled by
exposing the drum to the light emitted from the eraser lamp (PWB). This lowers the electrical conductivity of the drum sur-
face making the residual charge on the drum surface escape to the ground.
Figure 2-1-15Cleaning section
Figure 2-1-16Cleaning section block diagram





(1) Cleaning blade
(2) Cleaning roller
(3) Drum screw
(4) Drum frame
(5) Eraser lamp (PWB)
Engine PWBDrum
PWBEraser lamp (PWB)
Drum
Drum unit
Connect-L
PWB
YC4-6ERASER
Ground
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							2F8/2F9/2GA-1
2-1-10
2-1-7  Fuser section
(1) Fuser unit
The fuser section consists of the following parts and fixes the toner that is transferred to the paper at the transfer/separa-
tion section. The paper sent from the transfer/separation section is interleaved between the heat roller and the press roller. 
The heat roller is heated by the fuser heater lamp installed inside, and the toner is fused by heat and pressure and fixed 
onto the paper because the press roller is pressed by the fuser press spring. The fuser thermistor detects the temperature 
of the surface on the heat roller heated by the fuser heater lamp and this temperature is controlled by the engine PWB. If 
the fuse section shows extremely high temperature, the power line will be shut off and the fuser heater lamp is forced to 
turn off. When fusing of toner is complete, the paper is separated from he heat roller by the separator and ejected to the 
paper eject section/rear unit.
Figure 2-1-17Fuser unit

 




	

 

 





	


30/31 ppm printer
(EUR/USA model)
35/37 and 45/47
ppm printer
(EUR/USA model)

(1) Fuser heater lamp
(2) Heat roller
(3) Press roller
(4) Fuser upper frame
(5) Fuser lower frame
(6) Separator(7) Paper exit sensor (actuator)
(8) Paper exit pulley
(9) Paper exit roller
(10) Feed guide
(11) Fuser thermal cutout
(12) Fuser thermistor M
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