Brother International HL-3400CN Service Manual - Page 65

CHAPTER

4

STRUCTURE

OF

SYSTEM

COMPONENTS

3

Developing

The

developing

process

means

that

an

electrostatic

latent

image

on

the

OPC

belt

is

made

visible

by

depositing

toner

onto

the exposed

areas

of

the

OPC

belt.

(1)

Structure

of

the

Toner

Cartridge

(Refer

to

Fig.4-8

&

4.14.)

i)

The

toner

cartridge

is

located

as

shown

in

Fig.4-8.

ii)

Four

toner

cartridges

are

made

available

from

the

top

to

bottom

in

the

order

black,

yellow,

magenta

and

cyan.

iii)

Each

color

toner

is

loaded

in

the

corresponding

toner

cartridge.

(2)

Process

of

Developing

(Refer

to

Fig.4-8,

4-14,

4-15,

and

4-16)

i)

Toner

adheres

to

the

developer

roller

of

the

toner

cartridge.

Developing

is

processed

by

this

roller

contacting

the

OPC

belt

surface.

ii)

The

developer

roller

has

been

biased

to

the

potential

-DBV(V).

Fig.4-15

describes

the

relationship

established

between

the

potential

of

the

toner,

the

potential

-V

o

(V)

at

the

non

-exposed

area

of

OPC

belt

and

the

potential

-VR(V)

on

the exposed

area

of

the

OPC

belt.

iii)

Developing

is

processed

by

the

toner

adhering

to

the

OPC

belt

due

to

the

attraction

between

the

potential

of

the

toner

and

the

potential

-VR(V)

on

the

exposed

area

of

the

OPC

belt.

A

visible

Toner

image

is

formed

on

the

OPC

belt.

iv)

No

developing

takes

place

on

the

non

-exposed

area

because

the

potential

of

the

toner

and

that

of

the

OPC

belt

is

the

same

polarity

and

therefore

repel

each

other.

OPC

belt

Develper

roller

Toner

cartridge

0

Toner

Fig.

4-14

4-14

Brother International HL-3400CN Service Manual - Page 65

STRUCTURE, SYSTEM, COMPONENTS, Develper, roller, Toner, cartridge

Page 65 highlights