Mita-Kyocera FS7000 PARTS CATALOGUE SA03CH04

Chapter Four OPERATION OVERVIEW

Chapter Four OPERATION OVERVIEW

Electrophotographics system 4-4

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Paper feeding system 4-23

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Print timing charts 4-34

Basic engine functions 4-37

Engine controller system 4-38

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Logic controller system 4-51

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## #

Electrophotographics system

Operation overview

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Electrophotography

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Electrophotographic cycle

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)6

2 Exposure

1 Main Charging

6 Cleaning

4 Transfer

5 Fusing

3 Developing7 Erasing

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Operation overview

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Amorphous-silicon drum

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Photoconductive layer

Aluminum base cylinder

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Operation overview

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Charging the drum

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A

B

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Operation overview

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Toner

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Single component toner TK-30

A

B

C

D

A - Resin
B - Ferrite
C - Silica
D - Polisher

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Exposure

Operation overview

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B

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Operation overview

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a-Si LAYER

ALUMINUM

LASER BEAM

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LASER BEAM

250V

20V

0V

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Operation overview

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Scanner unit

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Operation overview

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Drum

n

Laser diode

o

Collimeter lens—

p

Cylindrical lens—

q

Polygon mirror (motor)—

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r

Primary f-theta lens—

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s

Secondary f-theta lens—

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Operation overview

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t

Diversion mirror —

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u

Protective glass —

v

Sensor mirror —

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Beam detector sensor —

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Operation overview

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Laser scanning

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Development

Operation overview

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Blade

Magnetism

0.1mm

Drum

Magnet

developed

Developing roller

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Operation overview

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Developing roller bias

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Blade

Develop. roller

Drum

AC+DC

Toner

Drum

fly

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Toner

Toner sensor

Develop. roller

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Surface

potential =

250V

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Area not exposed by laser

Area exposed by laser

Operation overview

Developing roller bias

160V DC+1.8kV AC

Developing

Developing

ç

+++++++

20V

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WRQHU1

Sensing plate

Sensable level

Toner

Developer unit

Toner

Toner sensor

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Image transfer

Operation overview

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A

A

+

B

-

B

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Paper separation

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704:

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Operation overview

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Fusing

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A

B

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Operation overview

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Heater(s) activated

Paper size

Idle

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Operation overview

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Drum cleaning and erasing static charge

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B

D

A

BC

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