Brother International HL-3400CN Service Manual - Page 69

CHAPTER

4

STRUCTURE

OF

SYSTEM

COMPONENTS

5

Belt

Discharging

(Erase

Lamp)

The

belt

discharging

process

means

that

upon

completion

of

the

drum

transfer

process,

an

LED

light

is

radiated

onto

the

OPC

belt

prior

to

mechanically

cleaning

the

belt

to

discharge

the

residual

charge.

(1)

Structure

of

Erase

Lamp

i)

The

erase

lamp

is

located

as

shown

in

Fig.4-8.

ii)

The

light

source

of

the

erase

lamp

is

24

light

emitting

diodes

(LEDs).

(2)

Process

of

Discharging

(Refer

to

Fig.4-19.)

i)

Though

the

toner

image

was

transferred

to

the

transfer

drum

in

the

drum

transfer

process,

there

is

still

a

residual

charge

on

the

OPC

belt.

ii)

The

residual

charge

(-VR)

on

the

OPC

belt

is

discharged

by

the

radiation

of

the

erase

lamp

light

prior

to

cleaning

the

belt.

I

888

i

O

I

(

O.

,

r.

•

!

o.

.‘..

x

"

•

6::

•

KE9.

8O

8809

*o

•

All

(

)

I

I

Drum

transferring

•

I

..::,

.

Belt

discharging

(Erase

lamp)

Fig.

4-19

)

Belt

cleaning

(Blade)

4-18

Brother International HL-3400CN Service Manual - Page 69

mechanically

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