Brother MFCL3770CDW Owner's Manual

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Examples of poor print quality Recommendation

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Vertical white streaks or bands appear on the page

• Wipe the windows of all four LED heads with a dry,

soft lint-free cloth.

• Wipe the scanner glass strip with a dry lint free soft

cloth.

• Make sure foreign material such as a torn piece of

paper, sticky notes, or dust is not inside the machine

or around the toner cartridge and drum unit

assemblies.

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Vertical colored streaks or bands appear on the page

• Wipe the scanner glass strip with a dry lint free soft

cloth.

• Clean all four corona wires (one for each color) inside

the drum unit by sliding the green tab.

Make sure the green tab of the corona wire is in

the home position (1).

1

• Replace the toner cartridge that matches the color of

the streak or band.

To identify the color of the toner cartridge, visit the

Brother Solutions Center at support.brother.com and

view the FAQs & Troubleshooting page for your

Brother model.

See Related Information: Replace the Toner Cartridge.

• Install a new drum unit.

See Related Information: Replace the Drum Unit.

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Horizontal colored lines appear on the page

• Identify the color causing the problem and replace the

toner cartridge that matches the color of the line.

To identify the color of the toner cartridge, visit the

Brother Solutions Center at

support.brother.com to

see the FAQs & Troubleshooting page.

See Related Information: Replace the Toner Cartridge.

• Install a new drum unit.

See Related Information: Replace the Drum Unit.

505

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Brother MFCL3770CDW