Name: Brother MFC MFC-9120CN
Brand: Brother
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Troubleshooting and routine maintenance

135

White streaks or bands down

the page

 Wipe the windows of all four LED heads with a dry lint free soft cloth.

(See Cleaning the LED heads on page 157.)

 Clean all four drum units. (See Cleaning the drum unit on page 159.)

 Identify the missing colour and put in a new toner cartridge. (See

Replacing a Toner cartridge on page 168.)

You may only need to replace one toner cartridge to solve the print

problem. To identify which toner cartridge needs to be replaced,

please visit us at http://solutions.brother.com/

to view our FAQs and

troubleshooting tips.

Coloured streaks or bands

down the page

 Clean all four corona wires (one for each colour) inside the drum unit

by sliding the green tab. (See Cleaning the corona wires

on page 158.)

 Make sure the corona wire cleaners are at their home positions (a).

 Clean the scanner glass and scanner glass strip. (See Cleaning the

scanner glass on page 156.)

 Replace the toner cartridge that matches the colour of the streak or

band. (See Replacing a Toner cartridge on page 168.)

You may only need to replace one toner cartridge to solve the print

problem. To identify which toner cartridge needs to be replaced,

please visit us at http://solutions.brother.com/

to view our FAQs and

troubleshooting tips.

 Put in a new drum unit. (See Replacing the drum units on page 174.)

You may only need to replace one drum unit to solve the print

problem. To identify which drum needs to be replaced, please visit us

at http://solutions.brother.com/

to view our FAQs and troubleshooting

tips.

Vertical streaks in a light

background

 Wipe the windows of all four LED heads with a dry lint free soft cloth.

(See Cleaning the LED heads on page 157.)

Examples of poor print

quality

Recommendation

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Print Technology	Laser
Connectivity	USB 2.0, Ethernet
Duplex Printing	Manual
ADF Capacity	35 sheets
Fax Modem Speed	33.6 Kbps
Functions	Print, Copy, Scan, Fax
Maximum Printing Speed (Black)	17 ppm
Maximum Printing Speed (Color)	17 ppm
Monthly Duty Cycle	Up to 30, 000 pages
Scanning Resolution	Up to 19200 x 19200 dpi (interpolated)
Optical Scan Resolution	1200 x 2400 dpi
Memory	64 MB
Paper Handling	250-sheet input tray
Scanner Type	Flatbed
Copy Speed	Up to 17 cpm
Paper Capacity	250 sheets
Print Speed	Up to 17 ppm (Black/Color)

Brother MFC MFC-9120CN User Manual

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Brother MFC MFC-9120CN Specifications

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