Brother MFC-8890DW Service Manual

3-54
Confidential
■ Dirt on the back of paper
■ Vertical streaks
■ Black vertical streaks in a light background
<User Check>
- This problem may disappear after printing approximately
10 pages of completely blank sheets.
Step Cause Check
Result Remedy
1
Scratch and Dirt
on the fuser unit
Is the pressure roller
ASSY dirty? Is any other
area in the machine dirty?
Yes Print approximate 10 pages.
No
Replace the fuser unit.
2
Scratch and Dirt
in the paper feed
system
Is the paper feed system
dirty? Yes
Wipe dirt off.
<User Check>
- This problem may occur with noise which is caused by dirt
on the corona wire in the drum unit. In this case, clean the
corona wire with the wire cleaner.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause Check
Result Remedy
1
Scratch and Dirt
in the paper feed
system
Is the paper feed system
dirty? Yes
Wipe dirt off.
2
Scratch and Dirt
on the exposure
drum
Are there scratch and
dirt on the surface of the
exposure drum?
Yes
Replace the drum unit.
3
Scratch and Dirt
on the heat roller
Are there scratch and
dirt on the surface of the
heat roller?
Yes
Replace the fuser unit.
CAUTION :
• If the machine prints the same pattern, especially including vertical streaks,
continuously, black vertical streaks may appear on the paper since the electrostatic
performance of the exposure drum is decreased temporally.
<User Check>
- Clean the inside of the machine and the corona wire in the drum
unit.
- Replace the toner cartridge with a new one.
Step Cause Check
Result Remedy
1
Drum unit failure
Is the problem solved after
replacing the drum unit?
Yes
Replace the drum unit.

Brother MFC-8890DW Specifications

General

Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Economical printing	Yes
Time to first page (black, normal)	8.5 s
Print speed (black, normal quality, A4/US Letter)	30 ppm
Scan to	E-mail, e-Mail, E-mail Server, File, FTP, Image, OCR, USB
Scanner type	Flatbed & ADF scanner
Grayscale levels	256
Input color depth	24 bit
Output color depth	48 bit
Maximum scan resolution	19200 x 19200 DPI
Optical scanning resolution	600 x 2400 DPI
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
N-in-1 copy function (N=)	4, 9, 16, 25
Copy speed (black, normal quality, A4)	30 cpm
Faxing	Mono faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Fax speed dialing (max numbers)	300
Total input capacity	250 sheets
Total output capacity	150 sheets
Auto document feeder (ADF) input capacity	50 sheets
Display	LCD
Market positioning	Business
Internal memory	64 MB
Sound power level (standby)	30 dB
Sound pressure level (printing)	56 dB
Dimensions (WxDxH)	531 x 451 x 475 mm
All-in-one functions	Copy, Fax, Print, Scan
Maximum internal memory	0.576 GB
Color all-in-one functions	Scan
Custom media width	69.8 - 216 mm
Maximum print size	216 x 356 mm
Custom media length	116 - 406.4 mm
Paper tray media types	Plain paper
Paper tray media weight	60 - 105 g/m²
Non-ISO print media sizes	Letter
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5, B6
Multi-purpose tray media types	Bond paper, Envelopes, Heavyweight paper, Labels, Plain paper, Transparencies
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Wi-Fi standards	802.11b, 802.11g
Security algorithms	LEAP
Standard interfaces	Ethernet
USB 2.0 ports quantity	1
AC input frequency	50 - 60 Hz
Power consumption (standby)	85 W
Power consumption (PowerSave)	19 W
Power consumption (average operating)	680 W
Package weight	22100 g
Maximum duty cycle	30000 pages per month
Mac operating systems supported	Mac OS X 10.3 Panther, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion
Server operating systems supported	Windows 2000 Advanced Server, Windows 2000 Server, Windows Server 2003, Windows Server 2003 x64, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64
Windows operating systems supported	Windows 2000, Windows 2000 Professional, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
Sustainability certificates	ENERGY STAR