White Spots; White Stripes or Faint; Dark Stripes or Toner- Page 220

Brother 7550MC User Manual

2014 Dodge Charger SRT Owner Manual

Table of Contents

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TROUBLESHOOTING PROCEDURES

16-15

MFC 4550/6550MC/7550MC
OP-US-5.0

Printouts 

are 

too 

dark 

or

light.

Question

Recommendation

Adjust 

the 

print 

conditions 

by 

setting 

the 

Print 

Density 

function,

or 

turn 

the 

print 

density 

dial 

counterclockwise 

for 

lighter

images 

and 

clockwise 

for 

darker 

images. 

It 

has 

been 

factory 

set

to 

the 

middle 

position. 

See 

“The 

Print 

is 

too 

Light 

or 

too 

Dark”on

page 

16-6.

You 

may 

fix 

this 

by 

wiping 

the 

scanner 

windows 

with 

clean 

soft

cloth. 

(See 

“Regular 

Maintenance” 

and 

“Cleaning 

the 

Drum

Unit” 

on 

page 

14-1~3.)

If 

the 

same 

problem 

occurs 

and 

the 

display 

shows 

CHANGE

DRUM, 

replace 

the 

drum 

unit 

with 

new 

one.

• Clean 

the 

machine 

interior 

and 

the 

primary 

corona 

wire 

of 

the

toner 

cartridge. 

See 

“Regular 

Maintenance” 

and 

“Cleaning

the 

Drum 

Unit” 

on 

page 

14-1~3.

• Make 

sure 

that 

the 

tab 

of 

the 

corona 

wire 

is 

at 

the 

home

position.

If 

the 

same 

print 

problem 

occurs 

and 

the 

display 

shows 

CHANGE

DRUM, 

after 

cleaning, 

replace 

the 

drum 

unit 

with 

new 

one.

Make 

sure 

that 

you 

use 

paper 

that 

meets 

the 

specifications.

Rough 

surface 

or 

thick 

media 

can 

cause 

the 

problem.

If 

you 

still 

have 

the 

same 

problem 

and 

the 

display 

shows

CHANGE 

DRUM, 

replace 

the 

drum 

unit 

with 

new 

one.

Printed pages are

stained 

with 

toner 

or

have 

vertical 

stripes.

Printed 

pages 

contain

white 

stripes.

White Stripes or Faint
lmages

White Spots

NOTICE

Printed pages have

white 

spots 

in 

black 

text

and 

graphics 

area.

Dark Stripes or Toner
Stains

Print Quality Problems

You 

will 

clear 

print 

quality 

problem 

by 

replacing 

the 

drum 

unit 

with 

a

new 

one 

if 

the 

display 

will 

show 

CHANGE 

DRUM. 

The 

old 

drum 

unit 

is 

at

the 

end 

of 

its 

life.

Detailed Information for Brother 7550MC User Manual

Lists of information found in Brother 7550MC User Manual - Page 220

  • 5.0 Printouts are too dark or light.
  • 6. You may fix this by wiping the scanner windows with a clean soft cloth.
  • 3.) If the same problem occurs and the display shows CHANGE DRUM, replace the drum unit with a new one.
  • 3. • Make sure that the tab of the corona wire is at the home position.
  • Clean the machine interior and the primary corona wire of the toner cartridge.
  • Make sure that the tab of the corona wire is at the home position.

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