Name: Brother MFC-9420CN
Brand: Brother
Rating: 5 (1 reviews)

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Troubleshooting and routine maintenance

C - 15

Improving the print quality

If you are having problems with print quality, please do a test print first (Menu/Set, 4, 2, 3).

If the problem appears on the printout, then match it to one of the examples below and follow the

recommendation. If the problem does not appear on the test print, please check driver settings

and the interface cables as the problem may not lie with the machine.

Examples of poor print quality Recommendation

White lines or bands or ribbing

across the page

■ Check that the machine is on a solid level surface.

■ Check that the back cover is closed properly.

■ Check that the toner cartridges are installed properly.

■ Shake the toner cartridges gently.

■ Check that the transfer roller is installed properly.

■ Replace the transfer roller. (See Replacing the transfer roller on page C-39.)

Colours are light or unclear on the

whole page

■ Check that the recommended paper was used. (See Recommended paper on

page 2-1.)

■ Change the paper to freshly unpacked paper, and then check that the problem

is solved.

■ Check that the back cover is closed properly.

■ Shake the toner cartridges gently.

■ Clean the laser glass. (See Cleaning the laser glass on page C-24.)

■ Turn off Toner Save. (See Toner Save on page 3-5.)

White streaks or bands down the

page

Clean the laser glass. (See Cleaning the laser glass on page C-24.)

Identify the missing colour and replace that toner cartridge. (See Replacing a toner

cartridge on page C-29.)

The toner has probably reached the end of its life.

However, when you see a white vertical line on the toner roller, try the following

procedure.

■ Cut a sheet approx. 50 mm x 50 mm out of a transparency film.

■ Insert the film about 10mm into the gap between the toner roller and the blade.

■ Slide the film and pull it out as shown below.

ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.

Other manuals for Brother MFC-9420CN

Service Manual428 pages

Network User's Guide83 pages

Quick Setup Guide40 pages

Software User's Guide145 pages

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Brother MFC-9420CN Specifications

General

Print technology	Laser
Maximum resolution	1200 x 2400 DPI
Economical printing	Yes
Print speed (black, normal quality, A4/US Letter)	31 ppm
Print speed (color, normal quality, A4/US Letter)	8 ppm
Digital sender	No
Number of print cartridges	4
Scanner type	Flatbed scanner
Scanner features	Scan to: e-mail, image, OCR, file
Copier resize	25 - 400 %
Maximum copy resolution	600 x 600 DPI
Maximum number of copies	99 copies
Copy speed (black, normal quality, A4)	31 cpm
Copy speed (color, normal quality, A4)	8 cpm
Faxing	Color faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Fax speed dialing (max numbers)	200
Total input capacity	750 sheets
Maximum input capacity	250 sheets
Auto document feeder (ADF) input capacity	35 sheets
Maximum internal memory	576 MB
Bundled software	ScanSoft PaperPort Presto! PageManager
I/O ports	IEEE-1284 USB 2.0
Dimensions (WxDxH)	483.5 x 514 x 530 mm
Printer management	BRAdmin Professional, MIB-II
Networking features	10Base-T/100Base-TX
All-in-one functions	Fax, Scan
Color all-in-one functions	copy, fax, print, scan
Compatible operating systems	Windows 98(SE)/ Me/ NT WorkStation 4.0/ 2000 Professional/ XP Mac OS 9.1 - 9.2, Mac OS X 10.2.4+
Sustainability certificates	ENERGY STAR
Power consumption (standby)	85 W
Power consumption (PowerSave)	16 W
Power consumption (average operating)	1090 W
Operating temperature (T-T)	10 - 32 °C
Operating relative humidity (H-H)	20 - 80 %
Market positioning	Business