Brother International HL-3400CN Service Manual - Page 315

HL-3400CN

SERVICE

MANUAL

1-17

Color

Misregistration

Phenomenon

Color

misregistration

is

caused

between

two

colors

as

shown

in

print

sample

(17)

of

Page

8-

46.

Main

Causes

(1)

The

OPC

belt

cartridge

is

not

properly

installed.

(2)

The

OPC

belt

cartridge

is

deformed.

(3)

The

cleaning

brush

of

the

drum

cleaner

is

unstable

in

operation.

(4)

Rotational

load

on

the

OPC

belt

cartridge

is

excessive.

**

This

problem

might

occur

in

the

first

page

printed

in

color

mode

immediately

after

printing

in

monochrome

mode,

or

the

first

page

immediately

after

turning

on

the

printer.

Countermeasures

(1)

Reset

the

OPC

belt

cartridge

properly.

(2)

Replace

the

OPC

belt

cartridge

with

a

new

one.

(See

Section

4.1

of

Chapter

6.)

(3)

Replace

the

drum

cleaner

with

a

new

one.

1-18

Toner

Streak

Phenomenon

Brush

mark

line

of

uneven scanning

density

is

caused

in

the

image

as

shown

in

print

sample

(18)

of

Page

8-46.

Main

Causes

(1)

Main

blade

of

the

developer

unit

and

the

reset

roller

is

not

normal.

(2)

Location

of

the

toner

cartridge

is

not

correct.

(3)

Transport

paddle

in

the

toner

cartridge

is

deformed.

(4)

Brush

mark

line

appears

in

the

continuous

printing

of

high

coverage

(solid)

patterns.

Countermeasures

(1)

Replace

the

toner

cartridge

with

a

new

one.

(2)

Temporarily

suspending

the

printing,

agitate

the

toner

cartridge

and

stabilize

the

replenishment

of

toner.

Brother International HL-3400CN Service Manual - Page 315

uneven scanning

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