Brother MFC-9450CDN User Manual page 85

Digital copier printer

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User manual (237 pages)

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Table of Contents

Examples of poor print

quality

Colored streaks or bands down

the page

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Colored lines across the page

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

White spots or hollow print

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Completely blank or some

colors are missing.

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Recommendation

One of the toner cartridges may be damaged. Replace the toner

cartridge that matches the color of the streak or band. (See Replacing

a toner cartridge on page 117.)

Clean all four corona wires (one for each color) of the drum unit by

sliding the green tab. (See Cleaning the corona wires on page 104.)

Make sure each corona wire's green tab is at the home position (b).

The drum unit may be damaged. Put in a new drum unit. (See

Replacing the drum unit on page 122.)

The fuser unit may have a smudge mark. Call Brother Customer

Service at 1-877-BROTHER (1-877-276-8437) (in USA) or

877

BROTHER (in Canada).

One of the toner cartridges may be damaged. Replace the toner

cartridge that matches the color of the line. (See Replacing a toner

cartridge on page 117.)

The drum unit may be damaged. Put in a new drum unit. (See

Replacing the drum unit on page 122.)

Clean all four corona wires (one for each color) of the drum unit by

sliding the green tab. (See Cleaning the corona wires on page 104.)

Clean the laser scanner windows with a soft cloth. (See Cleaning the

laser scanner windows on page 100.)

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

Acceptable paper and other media on page 10.)

Make sure that the recommended paper was used.

Choose Thick paper mode in the printer driver or in the machine

Paper Type menu setting, or use thinner paper than you are currently

using. (See Paper type on page 21 and Basic tab in the Software

User's Guide on the CD-ROM.)

Change the paper to fresh, unopened paper.

Check the machine

s environment. Conditions such as high humidity

can cause hollow print. (See Choosing a location on page 50.)

Clean all four corona wires (one for each color) of the drum unit by

sliding the green tab. (See Cleaning the corona wires on page 104.)

If the print quality has not improved, put in a new drum unit. (See

Replacing the drum unit on page 122.)

Make sure that the toner cartridges are installed properly. (See

Replacing a toner cartridge on page 117.)

One of the toner cartridges may be damaged. Identify the missing

color and put in a new toner cartridge for the color with the white line.

(See Replacing a toner cartridge on page 117.)

The drum unit may be damaged. Put in a new drum unit. (See

Replacing the drum unit on page 122.)

Troubleshooting and routine maintenance

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Brother MFC-9450CDN User Manual page 85

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