Examples of poor print - Page 131

Brother MFC-9440CN User's Guide

Table of Contents

USER’S GUIDE MFC-9440CN
Section II Fax
Section VI Appendixes
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Troubleshooting and routine maintenance

115

C

Colored spots at 2.95 in. 
(75 mm)

 

a

Dust, paper powder, glue, and so on may stick to the surface of the 
photosensitive drum (OPC) and cause black or white spots to 
appear on printed documents.

b

Make a few copies of a blank, white sheet of paper. (See 

Making 

multiple copies

 on page 70.)

c

If you still see the spots on printed documents after making multiple 
copies, clean the drum unit. (See 

Cleaning the drum unit

 on 

page 151.)

d

If the print quality still has not improved you need to install a new 
drum. (See 

Replacing the drum unit

 on page 166.)

Toner scatter or toner stain

 

„

Check the machine’s environment. Conditions such as high humidity 
and high temperatures may cause this print quality problem. (See 

Choosing a location

 on page 90.)

„

Make sure that you use paper that meets our specifications. Rough-
surfaced paper may cause the problem. (See 

Acceptable paper and 

other media

 on page 9.)

„

Install a new toner cartridge for the color causing the problem. (See 

Replacing a toner cartridge

 on page 161.)

„

Clean the corona wires and the drum unit for the color causing the 
problem. (See 

Cleaning the corona wires

 on page 147 and 

Cleaning 

the drum unit

 on page 151.) If the print quality has not improved, put 

in a new drum unit. (See 

Replacing the drum unit

 on page 166.)

Gray or colored background

 

„

Make sure that you use paper that meets our specifications. (See 

Acceptable paper and other media

 on page 9.

„

Check the machine

s environment. Conditions such as high 

temperatures and high humidity can increase the amount of 
background shading. (See 

Choosing a location

 on page 90.)

„

Install a new toner cartridge for the color causing the problem. (See 

Replacing a toner cartridge

 on page 161.)

„

Clean the corona wires and the drum unit for the color causing the 
problem. (See 

Cleaning the corona wires

 on page 147 and 

Cleaning 

the drum unit

 on page 151.) If the print quality has not improved, put 

in a new drum unit. (See 

Replacing the drum unit

 on page 166.)

Examples of poor print 
quality

Recommendation

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

75 mm / 2.95 in.

75 mm / 2.95 in.

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Detailed Information for Brother MFC-9440CN User's Guide

Lists of information found in Brother MFC-9440CN User's Guide - Page 131

  • 2.95 in.
  • 51.) d If the print quality still has not improved you need to install a new drum.
  • 66.) Toner scatter or toner stain „ Check the machine’s environment.
  • 9.) „ Install a new toner cartridge for the color causing the problem.
  • 61.) „ Clean the corona wires and the drum unit for the color causing the problem.
  • 51.) If the print quality has not improved, put in a new drum unit.
  • 66.) Gray or colored background „ Make sure that you use paper that meets our specifications.
  • 9.) „ Check the machine ’ s environment.
  • 61.) „ Clean the corona wires and the drum unit for the color causing the problem.
  • 51.) If the print quality has not improved, put in a new drum unit.
  • 66.) Examples of poor print quality Recommendation ABCDEFGHIJKLMNOPQRSTUVWXYZ.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 2.95 in.
  • 2.95 in.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.
  • 89. abcdefghijklmnopqrstuvwxyz.

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